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/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved    by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * evalfunc.c: Builtin functions
 */
#define USING_FLOAT_STUFF

#include "vim.h"

#if defined(FEAT_EVAL) || defined(PROTO)

#ifdef AMIGA
# include <time.h>      /* for strftime() */
#endif

#ifdef VMS
# include <float.h>
#endif

#ifdef MACOS_X
# include <time.h>      /* for time_t */
#endif

static char *e_listarg = N_("E686: Argument of %s must be a List");
#ifdef FEAT_QUICKFIX
static char *e_stringreq = N_("E928: String required");
#endif

#ifdef FEAT_FLOAT
static void f_abs(typval_T *argvars, typval_T *rettv);
static void f_acos(typval_T *argvars, typval_T *rettv);
#endif
static void f_add(typval_T *argvars, typval_T *rettv);
static void f_and(typval_T *argvars, typval_T *rettv);
static void f_append(typval_T *argvars, typval_T *rettv);
static void f_argc(typval_T *argvars, typval_T *rettv);
static void f_argidx(typval_T *argvars, typval_T *rettv);
static void f_arglistid(typval_T *argvars, typval_T *rettv);
static void f_argv(typval_T *argvars, typval_T *rettv);
static void f_assert_beeps(typval_T *argvars, typval_T *rettv);
static void f_assert_equal(typval_T *argvars, typval_T *rettv);
static void f_assert_equalfile(typval_T *argvars, typval_T *rettv);
static void f_assert_exception(typval_T *argvars, typval_T *rettv);
static void f_assert_fails(typval_T *argvars, typval_T *rettv);
static void f_assert_false(typval_T *argvars, typval_T *rettv);
static void f_assert_inrange(typval_T *argvars, typval_T *rettv);
static void f_assert_match(typval_T *argvars, typval_T *rettv);
static void f_assert_notequal(typval_T *argvars, typval_T *rettv);
static void f_assert_notmatch(typval_T *argvars, typval_T *rettv);
static void f_assert_report(typval_T *argvars, typval_T *rettv);
static void f_assert_true(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_asin(typval_T *argvars, typval_T *rettv);
static void f_atan(typval_T *argvars, typval_T *rettv);
static void f_atan2(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_BEVAL
static void f_balloon_show(typval_T *argvars, typval_T *rettv);
# if defined(FEAT_BEVAL_TERM)
static void f_balloon_split(typval_T *argvars, typval_T *rettv);
# endif
#endif
static void f_browse(typval_T *argvars, typval_T *rettv);
static void f_browsedir(typval_T *argvars, typval_T *rettv);
static void f_bufexists(typval_T *argvars, typval_T *rettv);
static void f_buflisted(typval_T *argvars, typval_T *rettv);
static void f_bufloaded(typval_T *argvars, typval_T *rettv);
static void f_bufname(typval_T *argvars, typval_T *rettv);
static void f_bufnr(typval_T *argvars, typval_T *rettv);
static void f_bufwinid(typval_T *argvars, typval_T *rettv);
static void f_bufwinnr(typval_T *argvars, typval_T *rettv);
static void f_byte2line(typval_T *argvars, typval_T *rettv);
static void byteidx(typval_T *argvars, typval_T *rettv, int comp);
static void f_byteidx(typval_T *argvars, typval_T *rettv);
static void f_byteidxcomp(typval_T *argvars, typval_T *rettv);
static void f_call(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_ceil(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_JOB_CHANNEL
static void f_ch_canread(typval_T *argvars, typval_T *rettv);
static void f_ch_close(typval_T *argvars, typval_T *rettv);
static void f_ch_close_in(typval_T *argvars, typval_T *rettv);
static void f_ch_evalexpr(typval_T *argvars, typval_T *rettv);
static void f_ch_evalraw(typval_T *argvars, typval_T *rettv);
static void f_ch_getbufnr(typval_T *argvars, typval_T *rettv);
static void f_ch_getjob(typval_T *argvars, typval_T *rettv);
static void f_ch_info(typval_T *argvars, typval_T *rettv);
static void f_ch_log(typval_T *argvars, typval_T *rettv);
static void f_ch_logfile(typval_T *argvars, typval_T *rettv);
static void f_ch_open(typval_T *argvars, typval_T *rettv);
static void f_ch_read(typval_T *argvars, typval_T *rettv);
static void f_ch_readraw(typval_T *argvars, typval_T *rettv);
static void f_ch_sendexpr(typval_T *argvars, typval_T *rettv);
static void f_ch_sendraw(typval_T *argvars, typval_T *rettv);
static void f_ch_setoptions(typval_T *argvars, typval_T *rettv);
static void f_ch_status(typval_T *argvars, typval_T *rettv);
#endif
static void f_changenr(typval_T *argvars, typval_T *rettv);
static void f_char2nr(typval_T *argvars, typval_T *rettv);
static void f_cindent(typval_T *argvars, typval_T *rettv);
static void f_clearmatches(typval_T *argvars, typval_T *rettv);
static void f_col(typval_T *argvars, typval_T *rettv);
#if defined(FEAT_INS_EXPAND)
static void f_complete(typval_T *argvars, typval_T *rettv);
static void f_complete_add(typval_T *argvars, typval_T *rettv);
static void f_complete_check(typval_T *argvars, typval_T *rettv);
#endif
static void f_confirm(typval_T *argvars, typval_T *rettv);
static void f_copy(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_cos(typval_T *argvars, typval_T *rettv);
static void f_cosh(typval_T *argvars, typval_T *rettv);
#endif
static void f_count(typval_T *argvars, typval_T *rettv);
static void f_cscope_connection(typval_T *argvars, typval_T *rettv);
static void f_cursor(typval_T *argsvars, typval_T *rettv);
static void f_deepcopy(typval_T *argvars, typval_T *rettv);
static void f_delete(typval_T *argvars, typval_T *rettv);
static void f_did_filetype(typval_T *argvars, typval_T *rettv);
static void f_diff_filler(typval_T *argvars, typval_T *rettv);
static void f_diff_hlID(typval_T *argvars, typval_T *rettv);
static void f_empty(typval_T *argvars, typval_T *rettv);
static void f_escape(typval_T *argvars, typval_T *rettv);
static void f_eval(typval_T *argvars, typval_T *rettv);
static void f_eventhandler(typval_T *argvars, typval_T *rettv);
static void f_executable(typval_T *argvars, typval_T *rettv);
static void f_execute(typval_T *argvars, typval_T *rettv);
static void f_exepath(typval_T *argvars, typval_T *rettv);
static void f_exists(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_exp(typval_T *argvars, typval_T *rettv);
#endif
static void f_expand(typval_T *argvars, typval_T *rettv);
static void f_extend(typval_T *argvars, typval_T *rettv);
static void f_feedkeys(typval_T *argvars, typval_T *rettv);
static void f_filereadable(typval_T *argvars, typval_T *rettv);
static void f_filewritable(typval_T *argvars, typval_T *rettv);
static void f_filter(typval_T *argvars, typval_T *rettv);
static void f_finddir(typval_T *argvars, typval_T *rettv);
static void f_findfile(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_float2nr(typval_T *argvars, typval_T *rettv);
static void f_floor(typval_T *argvars, typval_T *rettv);
static void f_fmod(typval_T *argvars, typval_T *rettv);
#endif
static void f_fnameescape(typval_T *argvars, typval_T *rettv);
static void f_fnamemodify(typval_T *argvars, typval_T *rettv);
static void f_foldclosed(typval_T *argvars, typval_T *rettv);
static void f_foldclosedend(typval_T *argvars, typval_T *rettv);
static void f_foldlevel(typval_T *argvars, typval_T *rettv);
static void f_foldtext(typval_T *argvars, typval_T *rettv);
static void f_foldtextresult(typval_T *argvars, typval_T *rettv);
static void f_foreground(typval_T *argvars, typval_T *rettv);
static void f_funcref(typval_T *argvars, typval_T *rettv);
static void f_function(typval_T *argvars, typval_T *rettv);
static void f_garbagecollect(typval_T *argvars, typval_T *rettv);
static void f_get(typval_T *argvars, typval_T *rettv);
static void f_getbufinfo(typval_T *argvars, typval_T *rettv);
static void f_getbufline(typval_T *argvars, typval_T *rettv);
static void f_getbufvar(typval_T *argvars, typval_T *rettv);
static void f_getchangelist(typval_T *argvars, typval_T *rettv);
static void f_getchar(typval_T *argvars, typval_T *rettv);
static void f_getcharmod(typval_T *argvars, typval_T *rettv);
static void f_getcharsearch(typval_T *argvars, typval_T *rettv);
static void f_getcmdline(typval_T *argvars, typval_T *rettv);
#if defined(FEAT_CMDL_COMPL)
static void f_getcompletion(typval_T *argvars, typval_T *rettv);
#endif
static void f_getcmdpos(typval_T *argvars, typval_T *rettv);
static void f_getcmdtype(typval_T *argvars, typval_T *rettv);
static void f_getcmdwintype(typval_T *argvars, typval_T *rettv);
static void f_getcwd(typval_T *argvars, typval_T *rettv);
static void f_getfontname(typval_T *argvars, typval_T *rettv);
static void f_getfperm(typval_T *argvars, typval_T *rettv);
static void f_getfsize(typval_T *argvars, typval_T *rettv);
static void f_getftime(typval_T *argvars, typval_T *rettv);
static void f_getftype(typval_T *argvars, typval_T *rettv);
static void f_getjumplist(typval_T *argvars, typval_T *rettv);
static void f_getline(typval_T *argvars, typval_T *rettv);
static void f_getloclist(typval_T *argvars UNUSED, typval_T *rettv UNUSED);
static void f_getmatches(typval_T *argvars, typval_T *rettv);
static void f_getpid(typval_T *argvars, typval_T *rettv);
static void f_getcurpos(typval_T *argvars, typval_T *rettv);
static void f_getpos(typval_T *argvars, typval_T *rettv);
static void f_getqflist(typval_T *argvars, typval_T *rettv);
static void f_getreg(typval_T *argvars, typval_T *rettv);
static void f_getregtype(typval_T *argvars, typval_T *rettv);
static void f_gettabinfo(typval_T *argvars, typval_T *rettv);
static void f_gettabvar(typval_T *argvars, typval_T *rettv);
static void f_gettabwinvar(typval_T *argvars, typval_T *rettv);
static void f_getwininfo(typval_T *argvars, typval_T *rettv);
static void f_getwinpos(typval_T *argvars, typval_T *rettv);
static void f_getwinposx(typval_T *argvars, typval_T *rettv);
static void f_getwinposy(typval_T *argvars, typval_T *rettv);
static void f_getwinvar(typval_T *argvars, typval_T *rettv);
static void f_glob(typval_T *argvars, typval_T *rettv);
static void f_globpath(typval_T *argvars, typval_T *rettv);
static void f_glob2regpat(typval_T *argvars, typval_T *rettv);
static void f_has(typval_T *argvars, typval_T *rettv);
static void f_has_key(typval_T *argvars, typval_T *rettv);
static void f_haslocaldir(typval_T *argvars, typval_T *rettv);
static void f_hasmapto(typval_T *argvars, typval_T *rettv);
static void f_histadd(typval_T *argvars, typval_T *rettv);
static void f_histdel(typval_T *argvars, typval_T *rettv);
static void f_histget(typval_T *argvars, typval_T *rettv);
static void f_histnr(typval_T *argvars, typval_T *rettv);
static void f_hlID(typval_T *argvars, typval_T *rettv);
static void f_hlexists(typval_T *argvars, typval_T *rettv);
static void f_hostname(typval_T *argvars, typval_T *rettv);
static void f_iconv(typval_T *argvars, typval_T *rettv);
static void f_indent(typval_T *argvars, typval_T *rettv);
static void f_index(typval_T *argvars, typval_T *rettv);
static void f_input(typval_T *argvars, typval_T *rettv);
static void f_inputdialog(typval_T *argvars, typval_T *rettv);
static void f_inputlist(typval_T *argvars, typval_T *rettv);
static void f_inputrestore(typval_T *argvars, typval_T *rettv);
static void f_inputsave(typval_T *argvars, typval_T *rettv);
static void f_inputsecret(typval_T *argvars, typval_T *rettv);
static void f_insert(typval_T *argvars, typval_T *rettv);
static void f_invert(typval_T *argvars, typval_T *rettv);
static void f_isdirectory(typval_T *argvars, typval_T *rettv);
static void f_islocked(typval_T *argvars, typval_T *rettv);
#if defined(FEAT_FLOAT) && defined(HAVE_MATH_H)
static void f_isnan(typval_T *argvars, typval_T *rettv);
#endif
static void f_items(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_JOB_CHANNEL
static void f_job_getchannel(typval_T *argvars, typval_T *rettv);
static void f_job_info(typval_T *argvars, typval_T *rettv);
static void f_job_setoptions(typval_T *argvars, typval_T *rettv);
static void f_job_start(typval_T *argvars, typval_T *rettv);
static void f_job_stop(typval_T *argvars, typval_T *rettv);
static void f_job_status(typval_T *argvars, typval_T *rettv);
#endif
static void f_join(typval_T *argvars, typval_T *rettv);
static void f_js_decode(typval_T *argvars, typval_T *rettv);
static void f_js_encode(typval_T *argvars, typval_T *rettv);
static void f_json_decode(typval_T *argvars, typval_T *rettv);
static void f_json_encode(typval_T *argvars, typval_T *rettv);
static void f_keys(typval_T *argvars, typval_T *rettv);
static void f_last_buffer_nr(typval_T *argvars, typval_T *rettv);
static void f_len(typval_T *argvars, typval_T *rettv);
static void f_libcall(typval_T *argvars, typval_T *rettv);
static void f_libcallnr(typval_T *argvars, typval_T *rettv);
static void f_line(typval_T *argvars, typval_T *rettv);
static void f_line2byte(typval_T *argvars, typval_T *rettv);
static void f_lispindent(typval_T *argvars, typval_T *rettv);
static void f_localtime(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_log(typval_T *argvars, typval_T *rettv);
static void f_log10(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_LUA
static void f_luaeval(typval_T *argvars, typval_T *rettv);
#endif
static void f_map(typval_T *argvars, typval_T *rettv);
static void f_maparg(typval_T *argvars, typval_T *rettv);
static void f_mapcheck(typval_T *argvars, typval_T *rettv);
static void f_match(typval_T *argvars, typval_T *rettv);
static void f_matchadd(typval_T *argvars, typval_T *rettv);
static void f_matchaddpos(typval_T *argvars, typval_T *rettv);
static void f_matcharg(typval_T *argvars, typval_T *rettv);
static void f_matchdelete(typval_T *argvars, typval_T *rettv);
static void f_matchend(typval_T *argvars, typval_T *rettv);
static void f_matchlist(typval_T *argvars, typval_T *rettv);
static void f_matchstr(typval_T *argvars, typval_T *rettv);
static void f_matchstrpos(typval_T *argvars, typval_T *rettv);
static void f_max(typval_T *argvars, typval_T *rettv);
static void f_min(typval_T *argvars, typval_T *rettv);
#ifdef vim_mkdir
static void f_mkdir(typval_T *argvars, typval_T *rettv);
#endif
static void f_mode(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_MZSCHEME
static void f_mzeval(typval_T *argvars, typval_T *rettv);
#endif
static void f_nextnonblank(typval_T *argvars, typval_T *rettv);
static void f_nr2char(typval_T *argvars, typval_T *rettv);
static void f_or(typval_T *argvars, typval_T *rettv);
static void f_pathshorten(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_PERL
static void f_perleval(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_FLOAT
static void f_pow(typval_T *argvars, typval_T *rettv);
#endif
static void f_prevnonblank(typval_T *argvars, typval_T *rettv);
static void f_printf(typval_T *argvars, typval_T *rettv);
static void f_pumvisible(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_PYTHON3
static void f_py3eval(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_PYTHON
static void f_pyeval(typval_T *argvars, typval_T *rettv);
#endif
#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3)
static void f_pyxeval(typval_T *argvars, typval_T *rettv);
#endif
static void f_range(typval_T *argvars, typval_T *rettv);
static void f_readfile(typval_T *argvars, typval_T *rettv);
static void f_reltime(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_reltimefloat(typval_T *argvars, typval_T *rettv);
#endif
static void f_reltimestr(typval_T *argvars, typval_T *rettv);
static void f_remote_expr(typval_T *argvars, typval_T *rettv);
static void f_remote_foreground(typval_T *argvars, typval_T *rettv);
static void f_remote_peek(typval_T *argvars, typval_T *rettv);
static void f_remote_read(typval_T *argvars, typval_T *rettv);
static void f_remote_send(typval_T *argvars, typval_T *rettv);
static void f_remote_startserver(typval_T *argvars, typval_T *rettv);
static void f_remove(typval_T *argvars, typval_T *rettv);
static void f_rename(typval_T *argvars, typval_T *rettv);
static void f_repeat(typval_T *argvars, typval_T *rettv);
static void f_resolve(typval_T *argvars, typval_T *rettv);
static void f_reverse(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_round(typval_T *argvars, typval_T *rettv);
#endif
static void f_screenattr(typval_T *argvars, typval_T *rettv);
static void f_screenchar(typval_T *argvars, typval_T *rettv);
static void f_screencol(typval_T *argvars, typval_T *rettv);
static void f_screenrow(typval_T *argvars, typval_T *rettv);
static void f_search(typval_T *argvars, typval_T *rettv);
static void f_searchdecl(typval_T *argvars, typval_T *rettv);
static void f_searchpair(typval_T *argvars, typval_T *rettv);
static void f_searchpairpos(typval_T *argvars, typval_T *rettv);
static void f_searchpos(typval_T *argvars, typval_T *rettv);
static void f_server2client(typval_T *argvars, typval_T *rettv);
static void f_serverlist(typval_T *argvars, typval_T *rettv);
static void f_setbufline(typval_T *argvars, typval_T *rettv);
static void f_setbufvar(typval_T *argvars, typval_T *rettv);
static void f_setcharsearch(typval_T *argvars, typval_T *rettv);
static void f_setcmdpos(typval_T *argvars, typval_T *rettv);
static void f_setfperm(typval_T *argvars, typval_T *rettv);
static void f_setline(typval_T *argvars, typval_T *rettv);
static void f_setloclist(typval_T *argvars, typval_T *rettv);
static void f_setmatches(typval_T *argvars, typval_T *rettv);
static void f_setpos(typval_T *argvars, typval_T *rettv);
static void f_setqflist(typval_T *argvars, typval_T *rettv);
static void f_setreg(typval_T *argvars, typval_T *rettv);
static void f_settabvar(typval_T *argvars, typval_T *rettv);
static void f_settabwinvar(typval_T *argvars, typval_T *rettv);
static void f_setwinvar(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_CRYPT
static void f_sha256(typval_T *argvars, typval_T *rettv);
#endif /* FEAT_CRYPT */
static void f_shellescape(typval_T *argvars, typval_T *rettv);
static void f_shiftwidth(typval_T *argvars, typval_T *rettv);
static void f_simplify(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_sin(typval_T *argvars, typval_T *rettv);
static void f_sinh(typval_T *argvars, typval_T *rettv);
#endif
static void f_sort(typval_T *argvars, typval_T *rettv);
static void f_soundfold(typval_T *argvars, typval_T *rettv);
static void f_spellbadword(typval_T *argvars, typval_T *rettv);
static void f_spellsuggest(typval_T *argvars, typval_T *rettv);
static void f_split(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_sqrt(typval_T *argvars, typval_T *rettv);
static void f_str2float(typval_T *argvars, typval_T *rettv);
#endif
static void f_str2nr(typval_T *argvars, typval_T *rettv);
static void f_strchars(typval_T *argvars, typval_T *rettv);
#ifdef HAVE_STRFTIME
static void f_strftime(typval_T *argvars, typval_T *rettv);
#endif
static void f_strgetchar(typval_T *argvars, typval_T *rettv);
static void f_stridx(typval_T *argvars, typval_T *rettv);
static void f_string(typval_T *argvars, typval_T *rettv);
static void f_strlen(typval_T *argvars, typval_T *rettv);
static void f_strcharpart(typval_T *argvars, typval_T *rettv);
static void f_strpart(typval_T *argvars, typval_T *rettv);
static void f_strridx(typval_T *argvars, typval_T *rettv);
static void f_strtrans(typval_T *argvars, typval_T *rettv);
static void f_strdisplaywidth(typval_T *argvars, typval_T *rettv);
static void f_strwidth(typval_T *argvars, typval_T *rettv);
static void f_submatch(typval_T *argvars, typval_T *rettv);
static void f_substitute(typval_T *argvars, typval_T *rettv);
static void f_synID(typval_T *argvars, typval_T *rettv);
static void f_synIDattr(typval_T *argvars, typval_T *rettv);
static void f_synIDtrans(typval_T *argvars, typval_T *rettv);
static void f_synstack(typval_T *argvars, typval_T *rettv);
static void f_synconcealed(typval_T *argvars, typval_T *rettv);
static void f_system(typval_T *argvars, typval_T *rettv);
static void f_systemlist(typval_T *argvars, typval_T *rettv);
static void f_tabpagebuflist(typval_T *argvars, typval_T *rettv);
static void f_tabpagenr(typval_T *argvars, typval_T *rettv);
static void f_tabpagewinnr(typval_T *argvars, typval_T *rettv);
static void f_taglist(typval_T *argvars, typval_T *rettv);
static void f_tagfiles(typval_T *argvars, typval_T *rettv);
static void f_tempname(typval_T *argvars, typval_T *rettv);
static void f_test_alloc_fail(typval_T *argvars, typval_T *rettv);
static void f_test_autochdir(typval_T *argvars, typval_T *rettv);
static void f_test_feedinput(typval_T *argvars, typval_T *rettv);
static void f_test_override(typval_T *argvars, typval_T *rettv);
static void f_test_garbagecollect_now(typval_T *argvars, typval_T *rettv);
static void f_test_ignore_error(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_JOB_CHANNEL
static void f_test_null_channel(typval_T *argvars, typval_T *rettv);
#endif
static void f_test_null_dict(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_JOB_CHANNEL
static void f_test_null_job(typval_T *argvars, typval_T *rettv);
#endif
static void f_test_null_list(typval_T *argvars, typval_T *rettv);
static void f_test_null_partial(typval_T *argvars, typval_T *rettv);
static void f_test_null_string(typval_T *argvars, typval_T *rettv);
static void f_test_settime(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_tan(typval_T *argvars, typval_T *rettv);
static void f_tanh(typval_T *argvars, typval_T *rettv);
#endif
#ifdef FEAT_TIMERS
static void f_timer_info(typval_T *argvars, typval_T *rettv);
static void f_timer_pause(typval_T *argvars, typval_T *rettv);
static void f_timer_start(typval_T *argvars, typval_T *rettv);
static void f_timer_stop(typval_T *argvars, typval_T *rettv);
static void f_timer_stopall(typval_T *argvars, typval_T *rettv);
#endif
static void f_tolower(typval_T *argvars, typval_T *rettv);
static void f_toupper(typval_T *argvars, typval_T *rettv);
static void f_tr(typval_T *argvars, typval_T *rettv);
static void f_trim(typval_T *argvars, typval_T *rettv);
#ifdef FEAT_FLOAT
static void f_trunc(typval_T *argvars, typval_T *rettv);
#endif
static void f_type(typval_T *argvars, typval_T *rettv);
static void f_undofile(typval_T *argvars, typval_T *rettv);
static void f_undotree(typval_T *argvars, typval_T *rettv);
static void f_uniq(typval_T *argvars, typval_T *rettv);
static void f_values(typval_T *argvars, typval_T *rettv);
static void f_virtcol(typval_T *argvars, typval_T *rettv);
static void f_visualmode(typval_T *argvars, typval_T *rettv);
static void f_wildmenumode(typval_T *argvars, typval_T *rettv);
static void f_win_findbuf(typval_T *argvars, typval_T *rettv);
static void f_win_getid(typval_T *argvars, typval_T *rettv);
static void f_win_gotoid(typval_T *argvars, typval_T *rettv);
static void f_win_id2tabwin(typval_T *argvars, typval_T *rettv);
static void f_win_id2win(typval_T *argvars, typval_T *rettv);
static void f_win_screenpos(typval_T *argvars, typval_T *rettv);
static void f_winbufnr(typval_T *argvars, typval_T *rettv);
static void f_wincol(typval_T *argvars, typval_T *rettv);
static void f_winheight(typval_T *argvars, typval_T *rettv);
static void f_winline(typval_T *argvars, typval_T *rettv);
static void f_winnr(typval_T *argvars, typval_T *rettv);
static void f_winrestcmd(typval_T *argvars, typval_T *rettv);
static void f_winrestview(typval_T *argvars, typval_T *rettv);
static void f_winsaveview(typval_T *argvars, typval_T *rettv);
static void f_winwidth(typval_T *argvars, typval_T *rettv);
static void f_writefile(typval_T *argvars, typval_T *rettv);
static void f_wordcount(typval_T *argvars, typval_T *rettv);
static void f_xor(typval_T *argvars, typval_T *rettv);

/*
 * Array with names and number of arguments of all internal functions
 * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
 */
static struct fst
{
    char        *f_name;        /* function name */
    char        f_min_argc;     /* minimal number of arguments */
    char        f_max_argc;     /* maximal number of arguments */
    void        (*f_func)(typval_T *args, typval_T *rvar);
                                /* implementation of function */
} functions[] =
{
#ifdef FEAT_FLOAT
    {"abs",             1, 1, f_abs},
    {"acos",            1, 1, f_acos},  /* WJMc */
#endif
    {"add",             2, 2, f_add},
    {"and",             2, 2, f_and},
    {"append",          2, 2, f_append},
    {"argc",            0, 0, f_argc},
    {"argidx",          0, 0, f_argidx},
    {"arglistid",       0, 2, f_arglistid},
    {"argv",            0, 1, f_argv},
#ifdef FEAT_FLOAT
    {"asin",            1, 1, f_asin},  /* WJMc */
#endif
    {"assert_beeps",    1, 2, f_assert_beeps},
    {"assert_equal",    2, 3, f_assert_equal},
    {"assert_equalfile", 2, 2, f_assert_equalfile},
    {"assert_exception", 1, 2, f_assert_exception},
    {"assert_fails",    1, 2, f_assert_fails},
    {"assert_false",    1, 2, f_assert_false},
    {"assert_inrange",  3, 4, f_assert_inrange},
    {"assert_match",    2, 3, f_assert_match},
    {"assert_notequal", 2, 3, f_assert_notequal},
    {"assert_notmatch", 2, 3, f_assert_notmatch},
    {"assert_report",   1, 1, f_assert_report},
    {"assert_true",     1, 2, f_assert_true},
#ifdef FEAT_FLOAT
    {"atan",            1, 1, f_atan},
    {"atan2",           2, 2, f_atan2},
#endif
#ifdef FEAT_BEVAL
    {"balloon_show",    1, 1, f_balloon_show},
# if defined(FEAT_BEVAL_TERM)
    {"balloon_split",   1, 1, f_balloon_split},
# endif
#endif
    {"browse",          4, 4, f_browse},
    {"browsedir",       2, 2, f_browsedir},
    {"bufexists",       1, 1, f_bufexists},
    {"buffer_exists",   1, 1, f_bufexists},     /* obsolete */
    {"buffer_name",     1, 1, f_bufname},       /* obsolete */
    {"buffer_number",   1, 1, f_bufnr},         /* obsolete */
    {"buflisted",       1, 1, f_buflisted},
    {"bufloaded",       1, 1, f_bufloaded},
    {"bufname",         1, 1, f_bufname},
    {"bufnr",           1, 2, f_bufnr},
    {"bufwinid",        1, 1, f_bufwinid},
    {"bufwinnr",        1, 1, f_bufwinnr},
    {"byte2line",       1, 1, f_byte2line},
    {"byteidx",         2, 2, f_byteidx},
    {"byteidxcomp",     2, 2, f_byteidxcomp},
    {"call",            2, 3, f_call},
#ifdef FEAT_FLOAT
    {"ceil",            1, 1, f_ceil},
#endif
#ifdef FEAT_JOB_CHANNEL
    {"ch_canread",      1, 1, f_ch_canread},
    {"ch_close",        1, 1, f_ch_close},
    {"ch_close_in",     1, 1, f_ch_close_in},
    {"ch_evalexpr",     2, 3, f_ch_evalexpr},
    {"ch_evalraw",      2, 3, f_ch_evalraw},
    {"ch_getbufnr",     2, 2, f_ch_getbufnr},
    {"ch_getjob",       1, 1, f_ch_getjob},
    {"ch_info",         1, 1, f_ch_info},
    {"ch_log",          1, 2, f_ch_log},
    {"ch_logfile",      1, 2, f_ch_logfile},
    {"ch_open",         1, 2, f_ch_open},
    {"ch_read",         1, 2, f_ch_read},
    {"ch_readraw",      1, 2, f_ch_readraw},
    {"ch_sendexpr",     2, 3, f_ch_sendexpr},
    {"ch_sendraw",      2, 3, f_ch_sendraw},
    {"ch_setoptions",   2, 2, f_ch_setoptions},
    {"ch_status",       1, 2, f_ch_status},
#endif
    {"changenr",        0, 0, f_changenr},
    {"char2nr",         1, 2, f_char2nr},
    {"cindent",         1, 1, f_cindent},
    {"clearmatches",    0, 0, f_clearmatches},
    {"col",             1, 1, f_col},
#if defined(FEAT_INS_EXPAND)
    {"complete",        2, 2, f_complete},
    {"complete_add",    1, 1, f_complete_add},
    {"complete_check",  0, 0, f_complete_check},
#endif
    {"confirm",         1, 4, f_confirm},
    {"copy",            1, 1, f_copy},
#ifdef FEAT_FLOAT
    {"cos",             1, 1, f_cos},
    {"cosh",            1, 1, f_cosh},
#endif
    {"count",           2, 4, f_count},
    {"cscope_connection",0,3, f_cscope_connection},
    {"cursor",          1, 3, f_cursor},
    {"deepcopy",        1, 2, f_deepcopy},
    {"delete",          1, 2, f_delete},
    {"did_filetype",    0, 0, f_did_filetype},
    {"diff_filler",     1, 1, f_diff_filler},
    {"diff_hlID",       2, 2, f_diff_hlID},
    {"empty",           1, 1, f_empty},
    {"escape",          2, 2, f_escape},
    {"eval",            1, 1, f_eval},
    {"eventhandler",    0, 0, f_eventhandler},
    {"executable",      1, 1, f_executable},
    {"execute",         1, 2, f_execute},
    {"exepath",         1, 1, f_exepath},
    {"exists",          1, 1, f_exists},
#ifdef FEAT_FLOAT
    {"exp",             1, 1, f_exp},
#endif
    {"expand",          1, 3, f_expand},
    {"extend",          2, 3, f_extend},
    {"feedkeys",        1, 2, f_feedkeys},
    {"file_readable",   1, 1, f_filereadable},  /* obsolete */
    {"filereadable",    1, 1, f_filereadable},
    {"filewritable",    1, 1, f_filewritable},
    {"filter",          2, 2, f_filter},
    {"finddir",         1, 3, f_finddir},
    {"findfile",        1, 3, f_findfile},
#ifdef FEAT_FLOAT
    {"float2nr",        1, 1, f_float2nr},
    {"floor",           1, 1, f_floor},
    {"fmod",            2, 2, f_fmod},
#endif
    {"fnameescape",     1, 1, f_fnameescape},
    {"fnamemodify",     2, 2, f_fnamemodify},
    {"foldclosed",      1, 1, f_foldclosed},
    {"foldclosedend",   1, 1, f_foldclosedend},
    {"foldlevel",       1, 1, f_foldlevel},
    {"foldtext",        0, 0, f_foldtext},
    {"foldtextresult",  1, 1, f_foldtextresult},
    {"foreground",      0, 0, f_foreground},
    {"funcref",         1, 3, f_funcref},
    {"function",        1, 3, f_function},
    {"garbagecollect",  0, 1, f_garbagecollect},
    {"get",             2, 3, f_get},
    {"getbufinfo",      0, 1, f_getbufinfo},
    {"getbufline",      2, 3, f_getbufline},
    {"getbufvar",       2, 3, f_getbufvar},
    {"getchangelist",   1, 1, f_getchangelist},
    {"getchar",         0, 1, f_getchar},
    {"getcharmod",      0, 0, f_getcharmod},
    {"getcharsearch",   0, 0, f_getcharsearch},
    {"getcmdline",      0, 0, f_getcmdline},
    {"getcmdpos",       0, 0, f_getcmdpos},
    {"getcmdtype",      0, 0, f_getcmdtype},
    {"getcmdwintype",   0, 0, f_getcmdwintype},
#if defined(FEAT_CMDL_COMPL)
    {"getcompletion",   2, 3, f_getcompletion},
#endif
    {"getcurpos",       0, 0, f_getcurpos},
    {"getcwd",          0, 2, f_getcwd},
    {"getfontname",     0, 1, f_getfontname},
    {"getfperm",        1, 1, f_getfperm},
    {"getfsize",        1, 1, f_getfsize},
    {"getftime",        1, 1, f_getftime},
    {"getftype",        1, 1, f_getftype},
    {"getjumplist",     0, 2, f_getjumplist},
    {"getline",         1, 2, f_getline},
    {"getloclist",      1, 2, f_getloclist},
    {"getmatches",      0, 0, f_getmatches},
    {"getpid",          0, 0, f_getpid},
    {"getpos",          1, 1, f_getpos},
    {"getqflist",       0, 1, f_getqflist},
    {"getreg",          0, 3, f_getreg},
    {"getregtype",      0, 1, f_getregtype},
    {"gettabinfo",      0, 1, f_gettabinfo},
    {"gettabvar",       2, 3, f_gettabvar},
    {"gettabwinvar",    3, 4, f_gettabwinvar},
    {"getwininfo",      0, 1, f_getwininfo},
    {"getwinpos",       0, 1, f_getwinpos},
    {"getwinposx",      0, 0, f_getwinposx},
    {"getwinposy",      0, 0, f_getwinposy},
    {"getwinvar",       2, 3, f_getwinvar},
    {"glob",            1, 4, f_glob},
    {"glob2regpat",     1, 1, f_glob2regpat},
    {"globpath",        2, 5, f_globpath},
    {"has",             1, 1, f_has},
    {"has_key",         2, 2, f_has_key},
    {"haslocaldir",     0, 2, f_haslocaldir},
    {"hasmapto",        1, 3, f_hasmapto},
    {"highlightID",     1, 1, f_hlID},          /* obsolete */
    {"highlight_exists",1, 1, f_hlexists},      /* obsolete */
    {"histadd",         2, 2, f_histadd},
    {"histdel",         1, 2, f_histdel},
    {"histget",         1, 2, f_histget},
    {"histnr",          1, 1, f_histnr},
    {"hlID",            1, 1, f_hlID},
    {"hlexists",        1, 1, f_hlexists},
    {"hostname",        0, 0, f_hostname},
    {"iconv",           3, 3, f_iconv},
    {"indent",          1, 1, f_indent},
    {"index",           2, 4, f_index},
    {"input",           1, 3, f_input},
    {"inputdialog",     1, 3, f_inputdialog},
    {"inputlist",       1, 1, f_inputlist},
    {"inputrestore",    0, 0, f_inputrestore},
    {"inputsave",       0, 0, f_inputsave},
    {"inputsecret",     1, 2, f_inputsecret},
    {"insert",          2, 3, f_insert},
    {"invert",          1, 1, f_invert},
    {"isdirectory",     1, 1, f_isdirectory},
    {"islocked",        1, 1, f_islocked},
#if defined(FEAT_FLOAT) && defined(HAVE_MATH_H)
    {"isnan",           1, 1, f_isnan},
#endif
    {"items",           1, 1, f_items},
#ifdef FEAT_JOB_CHANNEL
    {"job_getchannel",  1, 1, f_job_getchannel},
    {"job_info",        0, 1, f_job_info},
    {"job_setoptions",  2, 2, f_job_setoptions},
    {"job_start",       1, 2, f_job_start},
    {"job_status",      1, 1, f_job_status},
    {"job_stop",        1, 2, f_job_stop},
#endif
    {"join",            1, 2, f_join},
    {"js_decode",       1, 1, f_js_decode},
    {"js_encode",       1, 1, f_js_encode},
    {"json_decode",     1, 1, f_json_decode},
    {"json_encode",     1, 1, f_json_encode},
    {"keys",            1, 1, f_keys},
    {"last_buffer_nr",  0, 0, f_last_buffer_nr},/* obsolete */
    {"len",             1, 1, f_len},
    {"libcall",         3, 3, f_libcall},
    {"libcallnr",       3, 3, f_libcallnr},
    {"line",            1, 1, f_line},
    {"line2byte",       1, 1, f_line2byte},
    {"lispindent",      1, 1, f_lispindent},
    {"localtime",       0, 0, f_localtime},
#ifdef FEAT_FLOAT
    {"log",             1, 1, f_log},
    {"log10",           1, 1, f_log10},
#endif
#ifdef FEAT_LUA
    {"luaeval",         1, 2, f_luaeval},
#endif
    {"map",             2, 2, f_map},
    {"maparg",          1, 4, f_maparg},
    {"mapcheck",        1, 3, f_mapcheck},
    {"match",           2, 4, f_match},
    {"matchadd",        2, 5, f_matchadd},
    {"matchaddpos",     2, 5, f_matchaddpos},
    {"matcharg",        1, 1, f_matcharg},
    {"matchdelete",     1, 1, f_matchdelete},
    {"matchend",        2, 4, f_matchend},
    {"matchlist",       2, 4, f_matchlist},
    {"matchstr",        2, 4, f_matchstr},
    {"matchstrpos",     2, 4, f_matchstrpos},
    {"max",             1, 1, f_max},
    {"min",             1, 1, f_min},
#ifdef vim_mkdir
    {"mkdir",           1, 3, f_mkdir},
#endif
    {"mode",            0, 1, f_mode},
#ifdef FEAT_MZSCHEME
    {"mzeval",          1, 1, f_mzeval},
#endif
    {"nextnonblank",    1, 1, f_nextnonblank},
    {"nr2char",         1, 2, f_nr2char},
    {"or",              2, 2, f_or},
    {"pathshorten",     1, 1, f_pathshorten},
#ifdef FEAT_PERL
    {"perleval",        1, 1, f_perleval},
#endif
#ifdef FEAT_FLOAT
    {"pow",             2, 2, f_pow},
#endif
    {"prevnonblank",    1, 1, f_prevnonblank},
    {"printf",          1, 19, f_printf},
    {"pumvisible",      0, 0, f_pumvisible},
#ifdef FEAT_PYTHON3
    {"py3eval",         1, 1, f_py3eval},
#endif
#ifdef FEAT_PYTHON
    {"pyeval",          1, 1, f_pyeval},
#endif
#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3)
    {"pyxeval",         1, 1, f_pyxeval},
#endif
    {"range",           1, 3, f_range},
    {"readfile",        1, 3, f_readfile},
    {"reltime",         0, 2, f_reltime},
#ifdef FEAT_FLOAT
    {"reltimefloat",    1, 1, f_reltimefloat},
#endif
    {"reltimestr",      1, 1, f_reltimestr},
    {"remote_expr",     2, 4, f_remote_expr},
    {"remote_foreground", 1, 1, f_remote_foreground},
    {"remote_peek",     1, 2, f_remote_peek},
    {"remote_read",     1, 2, f_remote_read},
    {"remote_send",     2, 3, f_remote_send},
    {"remote_startserver", 1, 1, f_remote_startserver},
    {"remove",          2, 3, f_remove},
    {"rename",          2, 2, f_rename},
    {"repeat",          2, 2, f_repeat},
    {"resolve",         1, 1, f_resolve},
    {"reverse",         1, 1, f_reverse},
#ifdef FEAT_FLOAT
    {"round",           1, 1, f_round},
#endif
    {"screenattr",      2, 2, f_screenattr},
    {"screenchar",      2, 2, f_screenchar},
    {"screencol",       0, 0, f_screencol},
    {"screenrow",       0, 0, f_screenrow},
    {"search",          1, 4, f_search},
    {"searchdecl",      1, 3, f_searchdecl},
    {"searchpair",      3, 7, f_searchpair},
    {"searchpairpos",   3, 7, f_searchpairpos},
    {"searchpos",       1, 4, f_searchpos},
    {"server2client",   2, 2, f_server2client},
    {"serverlist",      0, 0, f_serverlist},
    {"setbufline",      3, 3, f_setbufline},
    {"setbufvar",       3, 3, f_setbufvar},
    {"setcharsearch",   1, 1, f_setcharsearch},
    {"setcmdpos",       1, 1, f_setcmdpos},
    {"setfperm",        2, 2, f_setfperm},
    {"setline",         2, 2, f_setline},
    {"setloclist",      2, 4, f_setloclist},
    {"setmatches",      1, 1, f_setmatches},
    {"setpos",          2, 2, f_setpos},
    {"setqflist",       1, 3, f_setqflist},
    {"setreg",          2, 3, f_setreg},
    {"settabvar",       3, 3, f_settabvar},
    {"settabwinvar",    4, 4, f_settabwinvar},
    {"setwinvar",       3, 3, f_setwinvar},
#ifdef FEAT_CRYPT
    {"sha256",          1, 1, f_sha256},
#endif
    {"shellescape",     1, 2, f_shellescape},
    {"shiftwidth",      0, 0, f_shiftwidth},
    {"simplify",        1, 1, f_simplify},
#ifdef FEAT_FLOAT
    {"sin",             1, 1, f_sin},
    {"sinh",            1, 1, f_sinh},
#endif
    {"sort",            1, 3, f_sort},
    {"soundfold",       1, 1, f_soundfold},
    {"spellbadword",    0, 1, f_spellbadword},
    {"spellsuggest",    1, 3, f_spellsuggest},
    {"split",           1, 3, f_split},
#ifdef FEAT_FLOAT
    {"sqrt",            1, 1, f_sqrt},
    {"str2float",       1, 1, f_str2float},
#endif
    {"str2nr",          1, 2, f_str2nr},
    {"strcharpart",     2, 3, f_strcharpart},
    {"strchars",        1, 2, f_strchars},
    {"strdisplaywidth", 1, 2, f_strdisplaywidth},
#ifdef HAVE_STRFTIME
    {"strftime",        1, 2, f_strftime},
#endif
    {"strgetchar",      2, 2, f_strgetchar},
    {"stridx",          2, 3, f_stridx},
    {"string",          1, 1, f_string},
    {"strlen",          1, 1, f_strlen},
    {"strpart",         2, 3, f_strpart},
    {"strridx",         2, 3, f_strridx},
    {"strtrans",        1, 1, f_strtrans},
    {"strwidth",        1, 1, f_strwidth},
    {"submatch",        1, 2, f_submatch},
    {"substitute",      4, 4, f_substitute},
    {"synID",           3, 3, f_synID},
    {"synIDattr",       2, 3, f_synIDattr},
    {"synIDtrans",      1, 1, f_synIDtrans},
    {"synconcealed",    2, 2, f_synconcealed},
    {"synstack",        2, 2, f_synstack},
    {"system",          1, 2, f_system},
    {"systemlist",      1, 2, f_systemlist},
    {"tabpagebuflist",  0, 1, f_tabpagebuflist},
    {"tabpagenr",       0, 1, f_tabpagenr},
    {"tabpagewinnr",    1, 2, f_tabpagewinnr},
    {"tagfiles",        0, 0, f_tagfiles},
    {"taglist",         1, 2, f_taglist},
#ifdef FEAT_FLOAT
    {"tan",             1, 1, f_tan},
    {"tanh",            1, 1, f_tanh},
#endif
    {"tempname",        0, 0, f_tempname},
#ifdef FEAT_TERMINAL
    {"term_dumpdiff",   2, 3, f_term_dumpdiff},
    {"term_dumpload",   1, 2, f_term_dumpload},
    {"term_dumpwrite",  2, 3, f_term_dumpwrite},
    {"term_getaltscreen", 1, 1, f_term_getaltscreen},
# if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
    {"term_getansicolors", 1, 1, f_term_getansicolors},
# endif
    {"term_getattr",    2, 2, f_term_getattr},
    {"term_getcursor",  1, 1, f_term_getcursor},
    {"term_getjob",     1, 1, f_term_getjob},
    {"term_getline",    2, 2, f_term_getline},
    {"term_getscrolled", 1, 1, f_term_getscrolled},
    {"term_getsize",    1, 1, f_term_getsize},
    {"term_getstatus",  1, 1, f_term_getstatus},
    {"term_gettitle",   1, 1, f_term_gettitle},
    {"term_gettty",     1, 2, f_term_gettty},
    {"term_list",       0, 0, f_term_list},
    {"term_scrape",     2, 2, f_term_scrape},
    {"term_sendkeys",   2, 2, f_term_sendkeys},
# if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
    {"term_setansicolors", 2, 2, f_term_setansicolors},
# endif
    {"term_setkill",    2, 2, f_term_setkill},
    {"term_setrestore", 2, 2, f_term_setrestore},
    {"term_setsize",    3, 3, f_term_setsize},
    {"term_start",      1, 2, f_term_start},
    {"term_wait",       1, 2, f_term_wait},
#endif
    {"test_alloc_fail", 3, 3, f_test_alloc_fail},
    {"test_autochdir",  0, 0, f_test_autochdir},
    {"test_feedinput",  1, 1, f_test_feedinput},
    {"test_garbagecollect_now", 0, 0, f_test_garbagecollect_now},
    {"test_ignore_error",       1, 1, f_test_ignore_error},
#ifdef FEAT_JOB_CHANNEL
    {"test_null_channel", 0, 0, f_test_null_channel},
#endif
    {"test_null_dict",  0, 0, f_test_null_dict},
#ifdef FEAT_JOB_CHANNEL
    {"test_null_job",   0, 0, f_test_null_job},
#endif
    {"test_null_list",  0, 0, f_test_null_list},
    {"test_null_partial", 0, 0, f_test_null_partial},
    {"test_null_string", 0, 0, f_test_null_string},
    {"test_override",    2, 2, f_test_override},
    {"test_settime",    1, 1, f_test_settime},
#ifdef FEAT_TIMERS
    {"timer_info",      0, 1, f_timer_info},
    {"timer_pause",     2, 2, f_timer_pause},
    {"timer_start",     2, 3, f_timer_start},
    {"timer_stop",      1, 1, f_timer_stop},
    {"timer_stopall",   0, 0, f_timer_stopall},
#endif
    {"tolower",         1, 1, f_tolower},
    {"toupper",         1, 1, f_toupper},
    {"tr",              3, 3, f_tr},
    {"trim",            1, 2, f_trim},
#ifdef FEAT_FLOAT
    {"trunc",           1, 1, f_trunc},
#endif
    {"type",            1, 1, f_type},
    {"undofile",        1, 1, f_undofile},
    {"undotree",        0, 0, f_undotree},
    {"uniq",            1, 3, f_uniq},
    {"values",          1, 1, f_values},
    {"virtcol",         1, 1, f_virtcol},
    {"visualmode",      0, 1, f_visualmode},
    {"wildmenumode",    0, 0, f_wildmenumode},
    {"win_findbuf",     1, 1, f_win_findbuf},
    {"win_getid",       0, 2, f_win_getid},
    {"win_gotoid",      1, 1, f_win_gotoid},
    {"win_id2tabwin",   1, 1, f_win_id2tabwin},
    {"win_id2win",      1, 1, f_win_id2win},
    {"win_screenpos",   1, 1, f_win_screenpos},
    {"winbufnr",        1, 1, f_winbufnr},
    {"wincol",          0, 0, f_wincol},
    {"winheight",       1, 1, f_winheight},
    {"winline",         0, 0, f_winline},
    {"winnr",           0, 1, f_winnr},
    {"winrestcmd",      0, 0, f_winrestcmd},
    {"winrestview",     1, 1, f_winrestview},
    {"winsaveview",     0, 0, f_winsaveview},
    {"winwidth",        1, 1, f_winwidth},
    {"wordcount",       0, 0, f_wordcount},
    {"writefile",       2, 3, f_writefile},
    {"xor",             2, 2, f_xor},
};

#if defined(FEAT_CMDL_COMPL) || defined(PROTO)

/*
 * Function given to ExpandGeneric() to obtain the list of internal
 * or user defined function names.
 */
    char_u *
get_function_name(expand_T *xp, int idx)
{
    static int  intidx = -1;
    char_u      *name;

    if (idx == 0)
        intidx = -1;
    if (intidx < 0)
    {
        name = get_user_func_name(xp, idx);
        if (name != NULL)
            return name;
    }
    if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
    {
        STRCPY(IObuff, functions[intidx].f_name);
        STRCAT(IObuff, "(");
        if (functions[intidx].f_max_argc == 0)
            STRCAT(IObuff, ")");
        return IObuff;
    }

    return NULL;
}

/*
 * Function given to ExpandGeneric() to obtain the list of internal or
 * user defined variable or function names.
 */
    char_u *
get_expr_name(expand_T *xp, int idx)
{
    static int  intidx = -1;
    char_u      *name;

    if (idx == 0)
        intidx = -1;
    if (intidx < 0)
    {
        name = get_function_name(xp, idx);
        if (name != NULL)
            return name;
    }
    return get_user_var_name(xp, ++intidx);
}

#endif /* FEAT_CMDL_COMPL */

/*
 * Find internal function in table above.
 * Return index, or -1 if not found
 */
    int
find_internal_func(
    char_u      *name)          /* name of the function */
{
    int         first = 0;
    int         last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
    int         cmp;
    int         x;

    /*
     * Find the function name in the table. Binary search.
     */
    while (first <= last)
    {
        x = first + ((unsigned)(last - first) >> 1);
        cmp = STRCMP(name, functions[x].f_name);
        if (cmp < 0)
            last = x - 1;
        else if (cmp > 0)
            first = x + 1;
        else
            return x;
    }
    return -1;
}

    int
call_internal_func(
        char_u      *name,
        int         argcount,
        typval_T    *argvars,
        typval_T    *rettv)
{
    int i;

    i = find_internal_func(name);
    if (i < 0)
        return ERROR_UNKNOWN;
    if (argcount < functions[i].f_min_argc)
        return ERROR_TOOFEW;
    if (argcount > functions[i].f_max_argc)
        return ERROR_TOOMANY;
    argvars[argcount].v_type = VAR_UNKNOWN;
    functions[i].f_func(argvars, rettv);
    return ERROR_NONE;
}

/*
 * Return TRUE for a non-zero Number and a non-empty String.
 */
    static int
non_zero_arg(typval_T *argvars)
{
    return ((argvars[0].v_type == VAR_NUMBER
                && argvars[0].vval.v_number != 0)
            || (argvars[0].v_type == VAR_SPECIAL
                && argvars[0].vval.v_number == VVAL_TRUE)
            || (argvars[0].v_type == VAR_STRING
                && argvars[0].vval.v_string != NULL
                && *argvars[0].vval.v_string != NUL));
}

/*
 * Get the lnum from the first argument.
 * Also accepts ".", "$", etc., but that only works for the current buffer.
 * Returns -1 on error.
 */
    static linenr_T
get_tv_lnum(typval_T *argvars)
{
    typval_T    rettv;
    linenr_T    lnum;

    lnum = (linenr_T)get_tv_number_chk(&argvars[0], NULL);
    if (lnum == 0)  /* no valid number, try using line() */
    {
        rettv.v_type = VAR_NUMBER;
        f_line(argvars, &rettv);
        lnum = (linenr_T)rettv.vval.v_number;
        clear_tv(&rettv);
    }
    return lnum;
}

#ifdef FEAT_FLOAT
static int get_float_arg(typval_T *argvars, float_T *f);

/*
 * Get the float value of "argvars[0]" into "f".
 * Returns FAIL when the argument is not a Number or Float.
 */
    static int
get_float_arg(typval_T *argvars, float_T *f)
{
    if (argvars[0].v_type == VAR_FLOAT)
    {
        *f = argvars[0].vval.v_float;
        return OK;
    }
    if (argvars[0].v_type == VAR_NUMBER)
    {
        *f = (float_T)argvars[0].vval.v_number;
        return OK;
    }
    EMSG(_("E808: Number or Float required"));
    return FAIL;
}

/*
 * "abs(expr)" function
 */
    static void
f_abs(typval_T *argvars, typval_T *rettv)
{
    if (argvars[0].v_type == VAR_FLOAT)
    {
        rettv->v_type = VAR_FLOAT;
        rettv->vval.v_float = fabs(argvars[0].vval.v_float);
    }
    else
    {
        varnumber_T     n;
        int             error = FALSE;

        n = get_tv_number_chk(&argvars[0], &error);
        if (error)
            rettv->vval.v_number = -1;
        else if (n > 0)
            rettv->vval.v_number = n;
        else
            rettv->vval.v_number = -n;
    }
}

/*
 * "acos()" function
 */
    static void
f_acos(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = acos(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "add(list, item)" function
 */
    static void
f_add(typval_T *argvars, typval_T *rettv)
{
    list_T      *l;

    rettv->vval.v_number = 1; /* Default: Failed */
    if (argvars[0].v_type == VAR_LIST)
    {
        if ((l = argvars[0].vval.v_list) != NULL
                && !tv_check_lock(l->lv_lock,
                                         (char_u *)N_("add() argument"), TRUE)
                && list_append_tv(l, &argvars[1]) == OK)
            copy_tv(&argvars[0], rettv);
    }
    else
        EMSG(_(e_listreq));
}

/*
 * "and(expr, expr)" function
 */
    static void
f_and(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
                                        & get_tv_number_chk(&argvars[1], NULL);
}

/*
 * "append(lnum, string/list)" function
 */
    static void
f_append(typval_T *argvars, typval_T *rettv)
{
    long        lnum;
    char_u      *line;
    list_T      *l = NULL;
    listitem_T  *li = NULL;
    typval_T    *tv;
    long        added = 0;

    /* When coming here from Insert mode, sync undo, so that this can be
     * undone separately from what was previously inserted. */
    if (u_sync_once == 2)
    {
        u_sync_once = 1; /* notify that u_sync() was called */
        u_sync(TRUE);
    }

    lnum = get_tv_lnum(argvars);
    if (lnum >= 0
            && lnum <= curbuf->b_ml.ml_line_count
            && u_save(lnum, lnum + 1) == OK)
    {
        if (argvars[1].v_type == VAR_LIST)
        {
            l = argvars[1].vval.v_list;
            if (l == NULL)
                return;
            li = l->lv_first;
        }
        for (;;)
        {
            if (l == NULL)
                tv = &argvars[1];       /* append a string */
            else if (li == NULL)
                break;                  /* end of list */
            else
                tv = &li->li_tv;        /* append item from list */
            line = get_tv_string_chk(tv);
            if (line == NULL)           /* type error */
            {
                rettv->vval.v_number = 1;       /* Failed */
                break;
            }
            ml_append(lnum + added, line, (colnr_T)0, FALSE);
            ++added;
            if (l == NULL)
                break;
            li = li->li_next;
        }

        appended_lines_mark(lnum, added);
        if (curwin->w_cursor.lnum > lnum)
            curwin->w_cursor.lnum += added;
    }
    else
        rettv->vval.v_number = 1;       /* Failed */
}

/*
 * "argc()" function
 */
    static void
f_argc(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = ARGCOUNT;
}

/*
 * "argidx()" function
 */
    static void
f_argidx(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = curwin->w_arg_idx;
}

/*
 * "arglistid()" function
 */
    static void
f_arglistid(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp;

    rettv->vval.v_number = -1;
    wp = find_tabwin(&argvars[0], &argvars[1]);
    if (wp != NULL)
        rettv->vval.v_number = wp->w_alist->id;
}

/*
 * "argv(nr)" function
 */
    static void
f_argv(typval_T *argvars, typval_T *rettv)
{
    int         idx;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        idx = (int)get_tv_number_chk(&argvars[0], NULL);
        if (idx >= 0 && idx < ARGCOUNT)
            rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
        else
            rettv->vval.v_string = NULL;
        rettv->v_type = VAR_STRING;
    }
    else if (rettv_list_alloc(rettv) == OK)
        for (idx = 0; idx < ARGCOUNT; ++idx)
            list_append_string(rettv->vval.v_list,
                                               alist_name(&ARGLIST[idx]), -1);
}

/*
 * "assert_beeps(cmd [, error])" function
 */
    static void
f_assert_beeps(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_beeps(argvars);
}

/*
 * "assert_equal(expected, actual[, msg])" function
 */
    static void
f_assert_equal(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_equal_common(argvars, ASSERT_EQUAL);
}

/*
 * "assert_equalfile(fname-one, fname-two)" function
 */
    static void
f_assert_equalfile(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_equalfile(argvars);
}

/*
 * "assert_notequal(expected, actual[, msg])" function
 */
    static void
f_assert_notequal(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_equal_common(argvars, ASSERT_NOTEQUAL);
}

/*
 * "assert_exception(string[, msg])" function
 */
    static void
f_assert_exception(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_exception(argvars);
}

/*
 * "assert_fails(cmd [, error])" function
 */
    static void
f_assert_fails(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_fails(argvars);
}

/*
 * "assert_false(actual[, msg])" function
 */
    static void
f_assert_false(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_bool(argvars, FALSE);
}

/*
 * "assert_inrange(lower, upper[, msg])" function
 */
    static void
f_assert_inrange(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_inrange(argvars);
}

/*
 * "assert_match(pattern, actual[, msg])" function
 */
    static void
f_assert_match(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_match_common(argvars, ASSERT_MATCH);
}

/*
 * "assert_notmatch(pattern, actual[, msg])" function
 */
    static void
f_assert_notmatch(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_match_common(argvars, ASSERT_NOTMATCH);
}

/*
 * "assert_report(msg)" function
 */
    static void
f_assert_report(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_report(argvars);
}

/*
 * "assert_true(actual[, msg])" function
 */
    static void
f_assert_true(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = assert_bool(argvars, TRUE);
}

#ifdef FEAT_FLOAT
/*
 * "asin()" function
 */
    static void
f_asin(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = asin(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "atan()" function
 */
    static void
f_atan(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = atan(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "atan2()" function
 */
    static void
f_atan2(typval_T *argvars, typval_T *rettv)
{
    float_T     fx = 0.0, fy = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &fx) == OK
                                     && get_float_arg(&argvars[1], &fy) == OK)
        rettv->vval.v_float = atan2(fx, fy);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "balloon_show()" function
 */
#ifdef FEAT_BEVAL
    static void
f_balloon_show(typval_T *argvars, typval_T *rettv UNUSED)
{
    if (balloonEval != NULL)
    {
        if (argvars[0].v_type == VAR_LIST
# ifdef FEAT_GUI
                && !gui.in_use
# endif
           )
            post_balloon(balloonEval, NULL, argvars[0].vval.v_list);
        else
            post_balloon(balloonEval, get_tv_string_chk(&argvars[0]), NULL);
    }
}

# if defined(FEAT_BEVAL_TERM)
    static void
f_balloon_split(typval_T *argvars, typval_T *rettv UNUSED)
{
    if (rettv_list_alloc(rettv) == OK)
    {
        char_u *msg = get_tv_string_chk(&argvars[0]);

        if (msg != NULL)
        {
            pumitem_T   *array;
            int         size = split_message(msg, &array);
            int         i;

            /* Skip the first and last item, they are always empty. */
            for (i = 1; i < size - 1; ++i)
                list_append_string(rettv->vval.v_list, array[i].pum_text, -1);
            while (size > 0)
                vim_free(array[--size].pum_text);
            vim_free(array);
        }
    }
}
# endif
#endif

/*
 * "browse(save, title, initdir, default)" function
 */
    static void
f_browse(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_BROWSE
    int         save;
    char_u      *title;
    char_u      *initdir;
    char_u      *defname;
    char_u      buf[NUMBUFLEN];
    char_u      buf2[NUMBUFLEN];
    int         error = FALSE;

    save = (int)get_tv_number_chk(&argvars[0], &error);
    title = get_tv_string_chk(&argvars[1]);
    initdir = get_tv_string_buf_chk(&argvars[2], buf);
    defname = get_tv_string_buf_chk(&argvars[3], buf2);

    if (error || title == NULL || initdir == NULL || defname == NULL)
        rettv->vval.v_string = NULL;
    else
        rettv->vval.v_string =
                 do_browse(save ? BROWSE_SAVE : 0,
                                 title, defname, NULL, initdir, NULL, curbuf);
#else
    rettv->vval.v_string = NULL;
#endif
    rettv->v_type = VAR_STRING;
}

/*
 * "browsedir(title, initdir)" function
 */
    static void
f_browsedir(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_BROWSE
    char_u      *title;
    char_u      *initdir;
    char_u      buf[NUMBUFLEN];

    title = get_tv_string_chk(&argvars[0]);
    initdir = get_tv_string_buf_chk(&argvars[1], buf);

    if (title == NULL || initdir == NULL)
        rettv->vval.v_string = NULL;
    else
        rettv->vval.v_string = do_browse(BROWSE_DIR,
                                    title, NULL, NULL, initdir, NULL, curbuf);
#else
    rettv->vval.v_string = NULL;
#endif
    rettv->v_type = VAR_STRING;
}

static buf_T *find_buffer(typval_T *avar);

/*
 * Find a buffer by number or exact name.
 */
    static buf_T *
find_buffer(typval_T *avar)
{
    buf_T       *buf = NULL;

    if (avar->v_type == VAR_NUMBER)
        buf = buflist_findnr((int)avar->vval.v_number);
    else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
    {
        buf = buflist_findname_exp(avar->vval.v_string);
        if (buf == NULL)
        {
            /* No full path name match, try a match with a URL or a "nofile"
             * buffer, these don't use the full path. */
            FOR_ALL_BUFFERS(buf)
                if (buf->b_fname != NULL
                        && (path_with_url(buf->b_fname)
#ifdef FEAT_QUICKFIX
                            || bt_nofile(buf)
#endif
                           )
                        && STRCMP(buf->b_fname, avar->vval.v_string) == 0)
                    break;
        }
    }
    return buf;
}

/*
 * "bufexists(expr)" function
 */
    static void
f_bufexists(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
}

/*
 * "buflisted(expr)" function
 */
    static void
f_buflisted(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf;

    buf = find_buffer(&argvars[0]);
    rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
}

/*
 * "bufloaded(expr)" function
 */
    static void
f_bufloaded(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf;

    buf = find_buffer(&argvars[0]);
    rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
}

    buf_T *
buflist_find_by_name(char_u *name, int curtab_only)
{
    int         save_magic;
    char_u      *save_cpo;
    buf_T       *buf;

    /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
    save_magic = p_magic;
    p_magic = TRUE;
    save_cpo = p_cpo;
    p_cpo = (char_u *)"";

    buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
                                                    TRUE, FALSE, curtab_only));

    p_magic = save_magic;
    p_cpo = save_cpo;
    return buf;
}

/*
 * Get buffer by number or pattern.
 */
    buf_T *
get_buf_tv(typval_T *tv, int curtab_only)
{
    char_u      *name = tv->vval.v_string;
    buf_T       *buf;

    if (tv->v_type == VAR_NUMBER)
        return buflist_findnr((int)tv->vval.v_number);
    if (tv->v_type != VAR_STRING)
        return NULL;
    if (name == NULL || *name == NUL)
        return curbuf;
    if (name[0] == '$' && name[1] == NUL)
        return lastbuf;

    buf = buflist_find_by_name(name, curtab_only);

    /* If not found, try expanding the name, like done for bufexists(). */
    if (buf == NULL)
        buf = find_buffer(tv);

    return buf;
}

/*
 * "bufname(expr)" function
 */
    static void
f_bufname(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf;

    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], FALSE);
    rettv->v_type = VAR_STRING;
    if (buf != NULL && buf->b_fname != NULL)
        rettv->vval.v_string = vim_strsave(buf->b_fname);
    else
        rettv->vval.v_string = NULL;
    --emsg_off;
}

/*
 * "bufnr(expr)" function
 */
    static void
f_bufnr(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf;
    int         error = FALSE;
    char_u      *name;

    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], FALSE);
    --emsg_off;

    /* If the buffer isn't found and the second argument is not zero create a
     * new buffer. */
    if (buf == NULL
            && argvars[1].v_type != VAR_UNKNOWN
            && get_tv_number_chk(&argvars[1], &error) != 0
            && !error
            && (name = get_tv_string_chk(&argvars[0])) != NULL
            && !error)
        buf = buflist_new(name, NULL, (linenr_T)1, 0);

    if (buf != NULL)
        rettv->vval.v_number = buf->b_fnum;
    else
        rettv->vval.v_number = -1;
}

    static void
buf_win_common(typval_T *argvars, typval_T *rettv, int get_nr)
{
    win_T       *wp;
    int         winnr = 0;
    buf_T       *buf;

    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], TRUE);
    FOR_ALL_WINDOWS(wp)
    {
        ++winnr;
        if (wp->w_buffer == buf)
            break;
    }
    rettv->vval.v_number = (wp != NULL ? (get_nr ? winnr : wp->w_id) : -1);
    --emsg_off;
}

/*
 * "bufwinid(nr)" function
 */
    static void
f_bufwinid(typval_T *argvars, typval_T *rettv)
{
    buf_win_common(argvars, rettv, FALSE);
}

/*
 * "bufwinnr(nr)" function
 */
    static void
f_bufwinnr(typval_T *argvars, typval_T *rettv)
{
    buf_win_common(argvars, rettv, TRUE);
}

/*
 * "byte2line(byte)" function
 */
    static void
f_byte2line(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifndef FEAT_BYTEOFF
    rettv->vval.v_number = -1;
#else
    long        boff = 0;

    boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
    if (boff < 0)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = ml_find_line_or_offset(curbuf,
                                                          (linenr_T)0, &boff);
#endif
}

    static void
byteidx(typval_T *argvars, typval_T *rettv, int comp UNUSED)
{
#ifdef FEAT_MBYTE
    char_u      *t;
#endif
    char_u      *str;
    varnumber_T idx;

    str = get_tv_string_chk(&argvars[0]);
    idx = get_tv_number_chk(&argvars[1], NULL);
    rettv->vval.v_number = -1;
    if (str == NULL || idx < 0)
        return;

#ifdef FEAT_MBYTE
    t = str;
    for ( ; idx > 0; idx--)
    {
        if (*t == NUL)          /* EOL reached */
            return;
        if (enc_utf8 && comp)
            t += utf_ptr2len(t);
        else
            t += (*mb_ptr2len)(t);
    }
    rettv->vval.v_number = (varnumber_T)(t - str);
#else
    if ((size_t)idx <= STRLEN(str))
        rettv->vval.v_number = idx;
#endif
}

/*
 * "byteidx()" function
 */
    static void
f_byteidx(typval_T *argvars, typval_T *rettv)
{
    byteidx(argvars, rettv, FALSE);
}

/*
 * "byteidxcomp()" function
 */
    static void
f_byteidxcomp(typval_T *argvars, typval_T *rettv)
{
    byteidx(argvars, rettv, TRUE);
}

/*
 * "call(func, arglist [, dict])" function
 */
    static void
f_call(typval_T *argvars, typval_T *rettv)
{
    char_u      *func;
    partial_T   *partial = NULL;
    dict_T      *selfdict = NULL;

    if (argvars[1].v_type != VAR_LIST)
    {
        EMSG(_(e_listreq));
        return;
    }
    if (argvars[1].vval.v_list == NULL)
        return;

    if (argvars[0].v_type == VAR_FUNC)
        func = argvars[0].vval.v_string;
    else if (argvars[0].v_type == VAR_PARTIAL)
    {
        partial = argvars[0].vval.v_partial;
        func = partial_name(partial);
    }
    else
        func = get_tv_string(&argvars[0]);
    if (*func == NUL)
        return;         /* type error or empty name */

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        if (argvars[2].v_type != VAR_DICT)
        {
            EMSG(_(e_dictreq));
            return;
        }
        selfdict = argvars[2].vval.v_dict;
    }

    (void)func_call(func, &argvars[1], partial, selfdict, rettv);
}

#ifdef FEAT_FLOAT
/*
 * "ceil({float})" function
 */
    static void
f_ceil(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = ceil(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

#ifdef FEAT_JOB_CHANNEL
/*
 * "ch_canread()" function
 */
    static void
f_ch_canread(typval_T *argvars, typval_T *rettv)
{
    channel_T *channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);

    rettv->vval.v_number = 0;
    if (channel != NULL)
        rettv->vval.v_number = channel_has_readahead(channel, PART_SOCK)
                            || channel_has_readahead(channel, PART_OUT)
                            || channel_has_readahead(channel, PART_ERR);
}

/*
 * "ch_close()" function
 */
    static void
f_ch_close(typval_T *argvars, typval_T *rettv UNUSED)
{
    channel_T *channel = get_channel_arg(&argvars[0], TRUE, FALSE, 0);

    if (channel != NULL)
    {
        channel_close(channel, FALSE);
        channel_clear(channel);
    }
}

/*
 * "ch_close()" function
 */
    static void
f_ch_close_in(typval_T *argvars, typval_T *rettv UNUSED)
{
    channel_T *channel = get_channel_arg(&argvars[0], TRUE, FALSE, 0);

    if (channel != NULL)
        channel_close_in(channel);
}

/*
 * "ch_getbufnr()" function
 */
    static void
f_ch_getbufnr(typval_T *argvars, typval_T *rettv)
{
    channel_T *channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);

    rettv->vval.v_number = -1;
    if (channel != NULL)
    {
        char_u  *what = get_tv_string(&argvars[1]);
        int     part;

        if (STRCMP(what, "err") == 0)
            part = PART_ERR;
        else if (STRCMP(what, "out") == 0)
            part = PART_OUT;
        else if (STRCMP(what, "in") == 0)
            part = PART_IN;
        else
            part = PART_SOCK;
        if (channel->ch_part[part].ch_bufref.br_buf != NULL)
            rettv->vval.v_number =
                              channel->ch_part[part].ch_bufref.br_buf->b_fnum;
    }
}

/*
 * "ch_getjob()" function
 */
    static void
f_ch_getjob(typval_T *argvars, typval_T *rettv)
{
    channel_T *channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);

    if (channel != NULL)
    {
        rettv->v_type = VAR_JOB;
        rettv->vval.v_job = channel->ch_job;
        if (channel->ch_job != NULL)
            ++channel->ch_job->jv_refcount;
    }
}

/*
 * "ch_info()" function
 */
    static void
f_ch_info(typval_T *argvars, typval_T *rettv UNUSED)
{
    channel_T *channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);

    if (channel != NULL && rettv_dict_alloc(rettv) != FAIL)
        channel_info(channel, rettv->vval.v_dict);
}

/*
 * "ch_log()" function
 */
    static void
f_ch_log(typval_T *argvars, typval_T *rettv UNUSED)
{
    char_u      *msg = get_tv_string(&argvars[0]);
    channel_T   *channel = NULL;

    if (argvars[1].v_type != VAR_UNKNOWN)
        channel = get_channel_arg(&argvars[1], FALSE, FALSE, 0);

    ch_log(channel, "%s", msg);
}

/*
 * "ch_logfile()" function
 */
    static void
f_ch_logfile(typval_T *argvars, typval_T *rettv UNUSED)
{
    char_u *fname;
    char_u *opt = (char_u *)"";
    char_u buf[NUMBUFLEN];

    /* Don't open a file in restricted mode. */
    if (check_restricted() || check_secure())
        return;
    fname = get_tv_string(&argvars[0]);
    if (argvars[1].v_type == VAR_STRING)
        opt = get_tv_string_buf(&argvars[1], buf);
    ch_logfile(fname, opt);
}

/*
 * "ch_open()" function
 */
    static void
f_ch_open(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_CHANNEL;
    if (check_restricted() || check_secure())
        return;
    rettv->vval.v_channel = channel_open_func(argvars);
}

/*
 * "ch_read()" function
 */
    static void
f_ch_read(typval_T *argvars, typval_T *rettv)
{
    common_channel_read(argvars, rettv, FALSE);
}

/*
 * "ch_readraw()" function
 */
    static void
f_ch_readraw(typval_T *argvars, typval_T *rettv)
{
    common_channel_read(argvars, rettv, TRUE);
}

/*
 * "ch_evalexpr()" function
 */
    static void
f_ch_evalexpr(typval_T *argvars, typval_T *rettv)
{
    ch_expr_common(argvars, rettv, TRUE);
}

/*
 * "ch_sendexpr()" function
 */
    static void
f_ch_sendexpr(typval_T *argvars, typval_T *rettv)
{
    ch_expr_common(argvars, rettv, FALSE);
}

/*
 * "ch_evalraw()" function
 */
    static void
f_ch_evalraw(typval_T *argvars, typval_T *rettv)
{
    ch_raw_common(argvars, rettv, TRUE);
}

/*
 * "ch_sendraw()" function
 */
    static void
f_ch_sendraw(typval_T *argvars, typval_T *rettv)
{
    ch_raw_common(argvars, rettv, FALSE);
}

/*
 * "ch_setoptions()" function
 */
    static void
f_ch_setoptions(typval_T *argvars, typval_T *rettv UNUSED)
{
    channel_T   *channel;
    jobopt_T    opt;

    channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);
    if (channel == NULL)
        return;
    clear_job_options(&opt);
    if (get_job_options(&argvars[1], &opt,
                            JO_CB_ALL + JO_TIMEOUT_ALL + JO_MODE_ALL, 0) == OK)
        channel_set_options(channel, &opt);
    free_job_options(&opt);
}

/*
 * "ch_status()" function
 */
    static void
f_ch_status(typval_T *argvars, typval_T *rettv)
{
    channel_T   *channel;
    jobopt_T    opt;
    int         part = -1;

    /* return an empty string by default */
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    channel = get_channel_arg(&argvars[0], FALSE, FALSE, 0);

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        clear_job_options(&opt);
        if (get_job_options(&argvars[1], &opt, JO_PART, 0) == OK
                                                     && (opt.jo_set & JO_PART))
            part = opt.jo_part;
    }

    rettv->vval.v_string = vim_strsave((char_u *)channel_status(channel, part));
}
#endif

/*
 * "changenr()" function
 */
    static void
f_changenr(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = curbuf->b_u_seq_cur;
}

/*
 * "char2nr(string)" function
 */
    static void
f_char2nr(typval_T *argvars, typval_T *rettv)
{
#ifdef FEAT_MBYTE
    if (has_mbyte)
    {
        int     utf8 = 0;

        if (argvars[1].v_type != VAR_UNKNOWN)
            utf8 = (int)get_tv_number_chk(&argvars[1], NULL);

        if (utf8)
            rettv->vval.v_number = (*utf_ptr2char)(get_tv_string(&argvars[0]));
        else
            rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
    }
    else
#endif
    rettv->vval.v_number = get_tv_string(&argvars[0])[0];
}

/*
 * "cindent(lnum)" function
 */
    static void
f_cindent(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_CINDENT
    pos_T       pos;
    linenr_T    lnum;

    pos = curwin->w_cursor;
    lnum = get_tv_lnum(argvars);
    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
    {
        curwin->w_cursor.lnum = lnum;
        rettv->vval.v_number = get_c_indent();
        curwin->w_cursor = pos;
    }
    else
#endif
        rettv->vval.v_number = -1;
}

/*
 * "clearmatches()" function
 */
    static void
f_clearmatches(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    clear_matches(curwin);
#endif
}

/*
 * "col(string)" function
 */
    static void
f_col(typval_T *argvars, typval_T *rettv)
{
    colnr_T     col = 0;
    pos_T       *fp;
    int         fnum = curbuf->b_fnum;

    fp = var2fpos(&argvars[0], FALSE, &fnum);
    if (fp != NULL && fnum == curbuf->b_fnum)
    {
        if (fp->col == MAXCOL)
        {
            /* '> can be MAXCOL, get the length of the line then */
            if (fp->lnum <= curbuf->b_ml.ml_line_count)
                col = (colnr_T)STRLEN(ml_get(fp->lnum)) + 1;
            else
                col = MAXCOL;
        }
        else
        {
            col = fp->col + 1;
#ifdef FEAT_VIRTUALEDIT
            /* col(".") when the cursor is on the NUL at the end of the line
             * because of "coladd" can be seen as an extra column. */
            if (virtual_active() && fp == &curwin->w_cursor)
            {
                char_u  *p = ml_get_cursor();

                if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
                                 curwin->w_virtcol - curwin->w_cursor.coladd))
                {
# ifdef FEAT_MBYTE
                    int         l;

                    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
                        col += l;
# else
                    if (*p != NUL && p[1] == NUL)
                        ++col;
# endif
                }
            }
#endif
        }
    }
    rettv->vval.v_number = col;
}

#if defined(FEAT_INS_EXPAND)
/*
 * "complete()" function
 */
    static void
f_complete(typval_T *argvars, typval_T *rettv UNUSED)
{
    int     startcol;

    if ((State & INSERT) == 0)
    {
        EMSG(_("E785: complete() can only be used in Insert mode"));
        return;
    }

    /* Check for undo allowed here, because if something was already inserted
     * the line was already saved for undo and this check isn't done. */
    if (!undo_allowed())
        return;

    if (argvars[1].v_type != VAR_LIST || argvars[1].vval.v_list == NULL)
    {
        EMSG(_(e_invarg));
        return;
    }

    startcol = (int)get_tv_number_chk(&argvars[0], NULL);
    if (startcol <= 0)
        return;

    set_completion(startcol - 1, argvars[1].vval.v_list);
}

/*
 * "complete_add()" function
 */
    static void
f_complete_add(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = ins_compl_add_tv(&argvars[0], 0);
}

/*
 * "complete_check()" function
 */
    static void
f_complete_check(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         saved = RedrawingDisabled;

    RedrawingDisabled = 0;
    ins_compl_check_keys(0, TRUE);
    rettv->vval.v_number = compl_interrupted;
    RedrawingDisabled = saved;
}
#endif

/*
 * "confirm(message, buttons[, default [, type]])" function
 */
    static void
f_confirm(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
    char_u      *message;
    char_u      *buttons = NULL;
    char_u      buf[NUMBUFLEN];
    char_u      buf2[NUMBUFLEN];
    int         def = 1;
    int         type = VIM_GENERIC;
    char_u      *vim_typestr;
    int         error = FALSE;

    message = get_tv_string_chk(&argvars[0]);
    if (message == NULL)
        error = TRUE;
    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        buttons = get_tv_string_buf_chk(&argvars[1], buf);
        if (buttons == NULL)
            error = TRUE;
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            def = (int)get_tv_number_chk(&argvars[2], &error);
            if (argvars[3].v_type != VAR_UNKNOWN)
            {
                vim_typestr = get_tv_string_buf_chk(&argvars[3], buf2);
                if (vim_typestr == NULL)
                    error = TRUE;
                else
                {
                    switch (TOUPPER_ASC(*vim_typestr))
                    {
                        case 'E': type = VIM_ERROR; break;
                        case 'Q': type = VIM_QUESTION; break;
                        case 'I': type = VIM_INFO; break;
                        case 'W': type = VIM_WARNING; break;
                        case 'G': type = VIM_GENERIC; break;
                    }
                }
            }
        }
    }

    if (buttons == NULL || *buttons == NUL)
        buttons = (char_u *)_("&Ok");

    if (!error)
        rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
                                                            def, NULL, FALSE);
#endif
}

/*
 * "copy()" function
 */
    static void
f_copy(typval_T *argvars, typval_T *rettv)
{
    item_copy(&argvars[0], rettv, FALSE, 0);
}

#ifdef FEAT_FLOAT
/*
 * "cos()" function
 */
    static void
f_cos(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = cos(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "cosh()" function
 */
    static void
f_cosh(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = cosh(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "count()" function
 */
    static void
f_count(typval_T *argvars, typval_T *rettv)
{
    long        n = 0;
    int         ic = FALSE;
    int         error = FALSE;

    if (argvars[2].v_type != VAR_UNKNOWN)
        ic = (int)get_tv_number_chk(&argvars[2], &error);

    if (argvars[0].v_type == VAR_STRING)
    {
        char_u *expr = get_tv_string_chk(&argvars[1]);
        char_u *p = argvars[0].vval.v_string;
        char_u *next;

        if (!error && expr != NULL && *expr != NUL && p != NULL)
        {
            if (ic)
            {
                size_t len = STRLEN(expr);

                while (*p != NUL)
                {
                    if (MB_STRNICMP(p, expr, len) == 0)
                    {
                        ++n;
                        p += len;
                    }
                    else
                        MB_PTR_ADV(p);
                }
            }
            else
                while ((next = (char_u *)strstr((char *)p, (char *)expr))
                                                                       != NULL)
                {
                    ++n;
                    p = next + STRLEN(expr);
                }
        }

    }
    else if (argvars[0].v_type == VAR_LIST)
    {
        listitem_T      *li;
        list_T          *l;
        long            idx;

        if ((l = argvars[0].vval.v_list) != NULL)
        {
            li = l->lv_first;
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                if (argvars[3].v_type != VAR_UNKNOWN)
                {
                    idx = (long)get_tv_number_chk(&argvars[3], &error);
                    if (!error)
                    {
                        li = list_find(l, idx);
                        if (li == NULL)
                            EMSGN(_(e_listidx), idx);
                    }
                }
                if (error)
                    li = NULL;
            }

            for ( ; li != NULL; li = li->li_next)
                if (tv_equal(&li->li_tv, &argvars[1], ic, FALSE))
                    ++n;
        }
    }
    else if (argvars[0].v_type == VAR_DICT)
    {
        int             todo;
        dict_T          *d;
        hashitem_T      *hi;

        if ((d = argvars[0].vval.v_dict) != NULL)
        {
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                if (argvars[3].v_type != VAR_UNKNOWN)
                    EMSG(_(e_invarg));
            }

            todo = error ? 0 : (int)d->dv_hashtab.ht_used;
            for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
            {
                if (!HASHITEM_EMPTY(hi))
                {
                    --todo;
                    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic, FALSE))
                        ++n;
                }
            }
        }
    }
    else
        EMSG2(_(e_listdictarg), "count()");
    rettv->vval.v_number = n;
}

/*
 * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
 *
 * Checks the existence of a cscope connection.
 */
    static void
f_cscope_connection(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_CSCOPE
    int         num = 0;
    char_u      *dbpath = NULL;
    char_u      *prepend = NULL;
    char_u      buf[NUMBUFLEN];

    if (argvars[0].v_type != VAR_UNKNOWN
            && argvars[1].v_type != VAR_UNKNOWN)
    {
        num = (int)get_tv_number(&argvars[0]);
        dbpath = get_tv_string(&argvars[1]);
        if (argvars[2].v_type != VAR_UNKNOWN)
            prepend = get_tv_string_buf(&argvars[2], buf);
    }

    rettv->vval.v_number = cs_connection(num, dbpath, prepend);
#endif
}

/*
 * "cursor(lnum, col)" function, or
 * "cursor(list)"
 *
 * Moves the cursor to the specified line and column.
 * Returns 0 when the position could be set, -1 otherwise.
 */
    static void
f_cursor(typval_T *argvars, typval_T *rettv)
{
    long        line, col;
#ifdef FEAT_VIRTUALEDIT
    long        coladd = 0;
#endif
    int         set_curswant = TRUE;

    rettv->vval.v_number = -1;
    if (argvars[1].v_type == VAR_UNKNOWN)
    {
        pos_T       pos;
        colnr_T     curswant = -1;

        if (list2fpos(argvars, &pos, NULL, &curswant) == FAIL)
        {
            EMSG(_(e_invarg));
            return;
        }
        line = pos.lnum;
        col = pos.col;
#ifdef FEAT_VIRTUALEDIT
        coladd = pos.coladd;
#endif
        if (curswant >= 0)
        {
            curwin->w_curswant = curswant - 1;
            set_curswant = FALSE;
        }
    }
    else
    {
        line = get_tv_lnum(argvars);
        col = (long)get_tv_number_chk(&argvars[1], NULL);
#ifdef FEAT_VIRTUALEDIT
        if (argvars[2].v_type != VAR_UNKNOWN)
            coladd = (long)get_tv_number_chk(&argvars[2], NULL);
#endif
    }
    if (line < 0 || col < 0
#ifdef FEAT_VIRTUALEDIT
                            || coladd < 0
#endif
            )
        return;         /* type error; errmsg already given */
    if (line > 0)
        curwin->w_cursor.lnum = line;
    if (col > 0)
        curwin->w_cursor.col = col - 1;
#ifdef FEAT_VIRTUALEDIT
    curwin->w_cursor.coladd = coladd;
#endif

    /* Make sure the cursor is in a valid position. */
    check_cursor();
#ifdef FEAT_MBYTE
    /* Correct cursor for multi-byte character. */
    if (has_mbyte)
        mb_adjust_cursor();
#endif

    curwin->w_set_curswant = set_curswant;
    rettv->vval.v_number = 0;
}

/*
 * "deepcopy()" function
 */
    static void
f_deepcopy(typval_T *argvars, typval_T *rettv)
{
    int         noref = 0;
    int         copyID;

    if (argvars[1].v_type != VAR_UNKNOWN)
        noref = (int)get_tv_number_chk(&argvars[1], NULL);
    if (noref < 0 || noref > 1)
        EMSG(_(e_invarg));
    else
    {
        copyID = get_copyID();
        item_copy(&argvars[0], rettv, TRUE, noref == 0 ? copyID : 0);
    }
}

/*
 * "delete()" function
 */
    static void
f_delete(typval_T *argvars, typval_T *rettv)
{
    char_u      nbuf[NUMBUFLEN];
    char_u      *name;
    char_u      *flags;

    rettv->vval.v_number = -1;
    if (check_restricted() || check_secure())
        return;

    name = get_tv_string(&argvars[0]);
    if (name == NULL || *name == NUL)
    {
        EMSG(_(e_invarg));
        return;
    }

    if (argvars[1].v_type != VAR_UNKNOWN)
        flags = get_tv_string_buf(&argvars[1], nbuf);
    else
        flags = (char_u *)"";

    if (*flags == NUL)
        /* delete a file */
        rettv->vval.v_number = mch_remove(name) == 0 ? 0 : -1;
    else if (STRCMP(flags, "d") == 0)
        /* delete an empty directory */
        rettv->vval.v_number = mch_rmdir(name) == 0 ? 0 : -1;
    else if (STRCMP(flags, "rf") == 0)
        /* delete a directory recursively */
        rettv->vval.v_number = delete_recursive(name);
    else
        EMSG2(_(e_invexpr2), flags);
}

/*
 * "did_filetype()" function
 */
    static void
f_did_filetype(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
    rettv->vval.v_number = did_filetype;
}

/*
 * "diff_filler()" function
 */
    static void
f_diff_filler(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_DIFF
    rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
#endif
}

/*
 * "diff_hlID()" function
 */
    static void
f_diff_hlID(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_DIFF
    linenr_T            lnum = get_tv_lnum(argvars);
    static linenr_T     prev_lnum = 0;
    static varnumber_T  changedtick = 0;
    static int          fnum = 0;
    static int          change_start = 0;
    static int          change_end = 0;
    static hlf_T        hlID = (hlf_T)0;
    int                 filler_lines;
    int                 col;

    if (lnum < 0)       /* ignore type error in {lnum} arg */
        lnum = 0;
    if (lnum != prev_lnum
            || changedtick != CHANGEDTICK(curbuf)
            || fnum != curbuf->b_fnum)
    {
        /* New line, buffer, change: need to get the values. */
        filler_lines = diff_check(curwin, lnum);
        if (filler_lines < 0)
        {
            if (filler_lines == -1)
            {
                change_start = MAXCOL;
                change_end = -1;
                if (diff_find_change(curwin, lnum, &change_start, &change_end))
                    hlID = HLF_ADD;     /* added line */
                else
                    hlID = HLF_CHD;     /* changed line */
            }
            else
                hlID = HLF_ADD; /* added line */
        }
        else
            hlID = (hlf_T)0;
        prev_lnum = lnum;
        changedtick = CHANGEDTICK(curbuf);
        fnum = curbuf->b_fnum;
    }

    if (hlID == HLF_CHD || hlID == HLF_TXD)
    {
        col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
        if (col >= change_start && col <= change_end)
            hlID = HLF_TXD;                     /* changed text */
        else
            hlID = HLF_CHD;                     /* changed line */
    }
    rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
#endif
}

/*
 * "empty({expr})" function
 */
    static void
f_empty(typval_T *argvars, typval_T *rettv)
{
    int         n = FALSE;

    switch (argvars[0].v_type)
    {
        case VAR_STRING:
        case VAR_FUNC:
            n = argvars[0].vval.v_string == NULL
                                          || *argvars[0].vval.v_string == NUL;
            break;
        case VAR_PARTIAL:
            n = FALSE;
            break;
        case VAR_NUMBER:
            n = argvars[0].vval.v_number == 0;
            break;
        case VAR_FLOAT:
#ifdef FEAT_FLOAT
            n = argvars[0].vval.v_float == 0.0;
            break;
#endif
        case VAR_LIST:
            n = argvars[0].vval.v_list == NULL
                                  || argvars[0].vval.v_list->lv_first == NULL;
            break;
        case VAR_DICT:
            n = argvars[0].vval.v_dict == NULL
                        || argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
            break;
        case VAR_SPECIAL:
            n = argvars[0].vval.v_number != VVAL_TRUE;
            break;

        case VAR_JOB:
#ifdef FEAT_JOB_CHANNEL
            n = argvars[0].vval.v_job == NULL
                           || argvars[0].vval.v_job->jv_status != JOB_STARTED;
            break;
#endif
        case VAR_CHANNEL:
#ifdef FEAT_JOB_CHANNEL
            n = argvars[0].vval.v_channel == NULL
                               || !channel_is_open(argvars[0].vval.v_channel);
            break;
#endif
        case VAR_UNKNOWN:
            internal_error("f_empty(UNKNOWN)");
            n = TRUE;
            break;
    }

    rettv->vval.v_number = n;
}

/*
 * "escape({string}, {chars})" function
 */
    static void
f_escape(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];

    rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
                                         get_tv_string_buf(&argvars[1], buf));
    rettv->v_type = VAR_STRING;
}

/*
 * "eval()" function
 */
    static void
f_eval(typval_T *argvars, typval_T *rettv)
{
    char_u      *s, *p;

    s = get_tv_string_chk(&argvars[0]);
    if (s != NULL)
        s = skipwhite(s);

    p = s;
    if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
    {
        if (p != NULL && !aborting())
            EMSG2(_(e_invexpr2), p);
        need_clr_eos = FALSE;
        rettv->v_type = VAR_NUMBER;
        rettv->vval.v_number = 0;
    }
    else if (*s != NUL)
        EMSG(_(e_trailing));
}

/*
 * "eventhandler()" function
 */
    static void
f_eventhandler(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = vgetc_busy;
}

/*
 * "executable()" function
 */
    static void
f_executable(typval_T *argvars, typval_T *rettv)
{
    char_u *name = get_tv_string(&argvars[0]);

    /* Check in $PATH and also check directly if there is a directory name. */
    rettv->vval.v_number = mch_can_exe(name, NULL, TRUE)
                 || (gettail(name) != name && mch_can_exe(name, NULL, FALSE));
}

static garray_T redir_execute_ga;

/*
 * Append "value[value_len]" to the execute() output.
 */
    void
execute_redir_str(char_u *value, int value_len)
{
    int         len;

    if (value_len == -1)
        len = (int)STRLEN(value);       /* Append the entire string */
    else
        len = value_len;                /* Append only "value_len" characters */
    if (ga_grow(&redir_execute_ga, len) == OK)
    {
        mch_memmove((char *)redir_execute_ga.ga_data
                                       + redir_execute_ga.ga_len, value, len);
        redir_execute_ga.ga_len += len;
    }
}

/*
 * Get next line from a list.
 * Called by do_cmdline() to get the next line.
 * Returns allocated string, or NULL for end of function.
 */

    static char_u *
get_list_line(
    int     c UNUSED,
    void    *cookie,
    int     indent UNUSED)
{
    listitem_T **p = (listitem_T **)cookie;
    listitem_T *item = *p;
    char_u      buf[NUMBUFLEN];
    char_u      *s;

    if (item == NULL)
        return NULL;
    s = get_tv_string_buf_chk(&item->li_tv, buf);
    *p = item->li_next;
    return s == NULL ? NULL : vim_strsave(s);
}

/*
 * "execute()" function
 */
    static void
f_execute(typval_T *argvars, typval_T *rettv)
{
    char_u      *cmd = NULL;
    list_T      *list = NULL;
    int         save_msg_silent = msg_silent;
    int         save_emsg_silent = emsg_silent;
    int         save_emsg_noredir = emsg_noredir;
    int         save_redir_execute = redir_execute;
    int         save_redir_off = redir_off;
    garray_T    save_ga;

    rettv->vval.v_string = NULL;
    rettv->v_type = VAR_STRING;

    if (argvars[0].v_type == VAR_LIST)
    {
        list = argvars[0].vval.v_list;
        if (list == NULL || list->lv_first == NULL)
            /* empty list, no commands, empty output */
            return;
        ++list->lv_refcount;
    }
    else
    {
        cmd = get_tv_string_chk(&argvars[0]);
        if (cmd == NULL)
            return;
    }

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        char_u  buf[NUMBUFLEN];
        char_u  *s = get_tv_string_buf_chk(&argvars[1], buf);

        if (s == NULL)
            return;
        if (STRNCMP(s, "silent", 6) == 0)
            ++msg_silent;
        if (STRCMP(s, "silent!") == 0)
        {
            emsg_silent = TRUE;
            emsg_noredir = TRUE;
        }
    }
    else
        ++msg_silent;

    if (redir_execute)
        save_ga = redir_execute_ga;
    ga_init2(&redir_execute_ga, (int)sizeof(char), 500);
    redir_execute = TRUE;
    redir_off = FALSE;

    if (cmd != NULL)
        do_cmdline_cmd(cmd);
    else
    {
        listitem_T      *item = list->lv_first;

        do_cmdline(NULL, get_list_line, (void *)&item,
                      DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT|DOCMD_KEYTYPED);
        --list->lv_refcount;
    }

    /* Need to append a NUL to the result. */
    if (ga_grow(&redir_execute_ga, 1) == OK)
    {
        ((char *)redir_execute_ga.ga_data)[redir_execute_ga.ga_len] = NUL;
        rettv->vval.v_string = redir_execute_ga.ga_data;
    }
    else
    {
        ga_clear(&redir_execute_ga);
        rettv->vval.v_string = NULL;
    }
    msg_silent = save_msg_silent;
    emsg_silent = save_emsg_silent;
    emsg_noredir = save_emsg_noredir;

    redir_execute = save_redir_execute;
    if (redir_execute)
        redir_execute_ga = save_ga;
    redir_off = save_redir_off;

    /* "silent reg" or "silent echo x" leaves msg_col somewhere in the
     * line.  Put it back in the first column. */
    msg_col = 0;
}

/*
 * "exepath()" function
 */
    static void
f_exepath(typval_T *argvars, typval_T *rettv)
{
    char_u *p = NULL;

    (void)mch_can_exe(get_tv_string(&argvars[0]), &p, TRUE);
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = p;
}

/*
 * "exists()" function
 */
    static void
f_exists(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;
    int         n = FALSE;

    p = get_tv_string(&argvars[0]);
    if (*p == '$')                      /* environment variable */
    {
        /* first try "normal" environment variables (fast) */
        if (mch_getenv(p + 1) != NULL)
            n = TRUE;
        else
        {
            /* try expanding things like $VIM and ${HOME} */
            p = expand_env_save(p);
            if (p != NULL && *p != '$')
                n = TRUE;
            vim_free(p);
        }
    }
    else if (*p == '&' || *p == '+')                    /* option */
    {
        n = (get_option_tv(&p, NULL, TRUE) == OK);
        if (*skipwhite(p) != NUL)
            n = FALSE;                  /* trailing garbage */
    }
    else if (*p == '*')                 /* internal or user defined function */
    {
        n = function_exists(p + 1, FALSE);
    }
    else if (*p == ':')
    {
        n = cmd_exists(p + 1);
    }
    else if (*p == '#')
    {
        if (p[1] == '#')
            n = autocmd_supported(p + 2);
        else
            n = au_exists(p + 1);
    }
    else                                /* internal variable */
    {
        n = var_exists(p);
    }

    rettv->vval.v_number = n;
}

#ifdef FEAT_FLOAT
/*
 * "exp()" function
 */
    static void
f_exp(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = exp(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "expand()" function
 */
    static void
f_expand(typval_T *argvars, typval_T *rettv)
{
    char_u      *s;
    int         len;
    char_u      *errormsg;
    int         options = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
    expand_T    xpc;
    int         error = FALSE;
    char_u      *result;

    rettv->v_type = VAR_STRING;
    if (argvars[1].v_type != VAR_UNKNOWN
            && argvars[2].v_type != VAR_UNKNOWN
            && get_tv_number_chk(&argvars[2], &error)
            && !error)
    {
        rettv_list_set(rettv, NULL);
    }

    s = get_tv_string(&argvars[0]);
    if (*s == '%' || *s == '#' || *s == '<')
    {
        ++emsg_off;
        result = eval_vars(s, s, &len, NULL, &errormsg, NULL);
        --emsg_off;
        if (rettv->v_type == VAR_LIST)
        {
            if (rettv_list_alloc(rettv) != FAIL && result != NULL)
                list_append_string(rettv->vval.v_list, result, -1);
            else
                vim_free(result);
        }
        else
            rettv->vval.v_string = result;
    }
    else
    {
        /* When the optional second argument is non-zero, don't remove matches
         * for 'wildignore' and don't put matches for 'suffixes' at the end. */
        if (argvars[1].v_type != VAR_UNKNOWN
                                    && get_tv_number_chk(&argvars[1], &error))
            options |= WILD_KEEP_ALL;
        if (!error)
        {
            ExpandInit(&xpc);
            xpc.xp_context = EXPAND_FILES;
            if (p_wic)
                options += WILD_ICASE;
            if (rettv->v_type == VAR_STRING)
                rettv->vval.v_string = ExpandOne(&xpc, s, NULL,
                                                           options, WILD_ALL);
            else if (rettv_list_alloc(rettv) != FAIL)
            {
                int i;

                ExpandOne(&xpc, s, NULL, options, WILD_ALL_KEEP);
                for (i = 0; i < xpc.xp_numfiles; i++)
                    list_append_string(rettv->vval.v_list, xpc.xp_files[i], -1);
                ExpandCleanup(&xpc);
            }
        }
        else
            rettv->vval.v_string = NULL;
    }
}

/*
 * "extend(list, list [, idx])" function
 * "extend(dict, dict [, action])" function
 */
    static void
f_extend(typval_T *argvars, typval_T *rettv)
{
    char_u      *arg_errmsg = (char_u *)N_("extend() argument");

    if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
    {
        list_T          *l1, *l2;
        listitem_T      *item;
        long            before;
        int             error = FALSE;

        l1 = argvars[0].vval.v_list;
        l2 = argvars[1].vval.v_list;
        if (l1 != NULL && !tv_check_lock(l1->lv_lock, arg_errmsg, TRUE)
                && l2 != NULL)
        {
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                before = (long)get_tv_number_chk(&argvars[2], &error);
                if (error)
                    return;             /* type error; errmsg already given */

                if (before == l1->lv_len)
                    item = NULL;
                else
                {
                    item = list_find(l1, before);
                    if (item == NULL)
                    {
                        EMSGN(_(e_listidx), before);
                        return;
                    }
                }
            }
            else
                item = NULL;
            list_extend(l1, l2, item);

            copy_tv(&argvars[0], rettv);
        }
    }
    else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
    {
        dict_T  *d1, *d2;
        char_u  *action;
        int     i;

        d1 = argvars[0].vval.v_dict;
        d2 = argvars[1].vval.v_dict;
        if (d1 != NULL && !tv_check_lock(d1->dv_lock, arg_errmsg, TRUE)
                && d2 != NULL)
        {
            /* Check the third argument. */
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                static char *(av[]) = {"keep", "force", "error"};

                action = get_tv_string_chk(&argvars[2]);
                if (action == NULL)
                    return;             /* type error; errmsg already given */
                for (i = 0; i < 3; ++i)
                    if (STRCMP(action, av[i]) == 0)
                        break;
                if (i == 3)
                {
                    EMSG2(_(e_invarg2), action);
                    return;
                }
            }
            else
                action = (char_u *)"force";

            dict_extend(d1, d2, action);

            copy_tv(&argvars[0], rettv);
        }
    }
    else
        EMSG2(_(e_listdictarg), "extend()");
}

/*
 * "feedkeys()" function
 */
    static void
f_feedkeys(typval_T *argvars, typval_T *rettv UNUSED)
{
    int         remap = TRUE;
    int         insert = FALSE;
    char_u      *keys, *flags;
    char_u      nbuf[NUMBUFLEN];
    int         typed = FALSE;
    int         execute = FALSE;
    int         dangerous = FALSE;
    char_u      *keys_esc;

    /* This is not allowed in the sandbox.  If the commands would still be
     * executed in the sandbox it would be OK, but it probably happens later,
     * when "sandbox" is no longer set. */
    if (check_secure())
        return;

    keys = get_tv_string(&argvars[0]);

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        flags = get_tv_string_buf(&argvars[1], nbuf);
        for ( ; *flags != NUL; ++flags)
        {
            switch (*flags)
            {
                case 'n': remap = FALSE; break;
                case 'm': remap = TRUE; break;
                case 't': typed = TRUE; break;
                case 'i': insert = TRUE; break;
                case 'x': execute = TRUE; break;
                case '!': dangerous = TRUE; break;
            }
        }
    }

    if (*keys != NUL || execute)
    {
        /* Need to escape K_SPECIAL and CSI before putting the string in the
         * typeahead buffer. */
        keys_esc = vim_strsave_escape_csi(keys);
        if (keys_esc != NULL)
        {
            ins_typebuf(keys_esc, (remap ? REMAP_YES : REMAP_NONE),
                                  insert ? 0 : typebuf.tb_len, !typed, FALSE);
            vim_free(keys_esc);
            if (vgetc_busy
#ifdef FEAT_TIMERS
                    || timer_busy
#endif
                    )
                typebuf_was_filled = TRUE;
            if (execute)
            {
                int save_msg_scroll = msg_scroll;

                /* Avoid a 1 second delay when the keys start Insert mode. */
                msg_scroll = FALSE;

                if (!dangerous)
                    ++ex_normal_busy;
                exec_normal(TRUE, TRUE);
                if (!dangerous)
                    --ex_normal_busy;

                msg_scroll |= save_msg_scroll;
            }
        }
    }
}

/*
 * "filereadable()" function
 */
    static void
f_filereadable(typval_T *argvars, typval_T *rettv)
{
    int         fd;
    char_u      *p;
    int         n;

#ifndef O_NONBLOCK
# define O_NONBLOCK 0
#endif
    p = get_tv_string(&argvars[0]);
    if (*p && !mch_isdir(p) && (fd = mch_open((char *)p,
                                              O_RDONLY | O_NONBLOCK, 0)) >= 0)
    {
        n = TRUE;
        close(fd);
    }
    else
        n = FALSE;

    rettv->vval.v_number = n;
}

/*
 * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
 * rights to write into.
 */
    static void
f_filewritable(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
}

    static void
findfilendir(
    typval_T    *argvars UNUSED,
    typval_T    *rettv,
    int         find_what UNUSED)
{
#ifdef FEAT_SEARCHPATH
    char_u      *fname;
    char_u      *fresult = NULL;
    char_u      *path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
    char_u      *p;
    char_u      pathbuf[NUMBUFLEN];
    int         count = 1;
    int         first = TRUE;
    int         error = FALSE;
#endif

    rettv->vval.v_string = NULL;
    rettv->v_type = VAR_STRING;

#ifdef FEAT_SEARCHPATH
    fname = get_tv_string(&argvars[0]);

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        p = get_tv_string_buf_chk(&argvars[1], pathbuf);
        if (p == NULL)
            error = TRUE;
        else
        {
            if (*p != NUL)
                path = p;

            if (argvars[2].v_type != VAR_UNKNOWN)
                count = (int)get_tv_number_chk(&argvars[2], &error);
        }
    }

    if (count < 0 && rettv_list_alloc(rettv) == FAIL)
        error = TRUE;

    if (*fname != NUL && !error)
    {
        do
        {
            if (rettv->v_type == VAR_STRING || rettv->v_type == VAR_LIST)
                vim_free(fresult);
            fresult = find_file_in_path_option(first ? fname : NULL,
                                               first ? (int)STRLEN(fname) : 0,
                                        0, first, path,
                                        find_what,
                                        curbuf->b_ffname,
                                        find_what == FINDFILE_DIR
                                            ? (char_u *)"" : curbuf->b_p_sua);
            first = FALSE;

            if (fresult != NULL && rettv->v_type == VAR_LIST)
                list_append_string(rettv->vval.v_list, fresult, -1);

        } while ((rettv->v_type == VAR_LIST || --count > 0) && fresult != NULL);
    }

    if (rettv->v_type == VAR_STRING)
        rettv->vval.v_string = fresult;
#endif
}

/*
 * "filter()" function
 */
    static void
f_filter(typval_T *argvars, typval_T *rettv)
{
    filter_map(argvars, rettv, FALSE);
}

/*
 * "finddir({fname}[, {path}[, {count}]])" function
 */
    static void
f_finddir(typval_T *argvars, typval_T *rettv)
{
    findfilendir(argvars, rettv, FINDFILE_DIR);
}

/*
 * "findfile({fname}[, {path}[, {count}]])" function
 */
    static void
f_findfile(typval_T *argvars, typval_T *rettv)
{
    findfilendir(argvars, rettv, FINDFILE_FILE);
}

#ifdef FEAT_FLOAT
/*
 * "float2nr({float})" function
 */
    static void
f_float2nr(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    if (get_float_arg(argvars, &f) == OK)
    {
        if (f <= -VARNUM_MAX + DBL_EPSILON)
            rettv->vval.v_number = -VARNUM_MAX;
        else if (f >= VARNUM_MAX - DBL_EPSILON)
            rettv->vval.v_number = VARNUM_MAX;
        else
            rettv->vval.v_number = (varnumber_T)f;
    }
}

/*
 * "floor({float})" function
 */
    static void
f_floor(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = floor(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "fmod()" function
 */
    static void
f_fmod(typval_T *argvars, typval_T *rettv)
{
    float_T     fx = 0.0, fy = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &fx) == OK
                                     && get_float_arg(&argvars[1], &fy) == OK)
        rettv->vval.v_float = fmod(fx, fy);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "fnameescape({string})" function
 */
    static void
f_fnameescape(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_string = vim_strsave_fnameescape(
                                           get_tv_string(&argvars[0]), FALSE);
    rettv->v_type = VAR_STRING;
}

/*
 * "fnamemodify({fname}, {mods})" function
 */
    static void
f_fnamemodify(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    char_u      *mods;
    int         usedlen = 0;
    int         len;
    char_u      *fbuf = NULL;
    char_u      buf[NUMBUFLEN];

    fname = get_tv_string_chk(&argvars[0]);
    mods = get_tv_string_buf_chk(&argvars[1], buf);
    if (fname == NULL || mods == NULL)
        fname = NULL;
    else
    {
        len = (int)STRLEN(fname);
        (void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
    }

    rettv->v_type = VAR_STRING;
    if (fname == NULL)
        rettv->vval.v_string = NULL;
    else
        rettv->vval.v_string = vim_strnsave(fname, len);
    vim_free(fbuf);
}

static void foldclosed_both(typval_T *argvars, typval_T *rettv, int end);

/*
 * "foldclosed()" function
 */
    static void
foldclosed_both(
    typval_T    *argvars UNUSED,
    typval_T    *rettv,
    int         end UNUSED)
{
#ifdef FEAT_FOLDING
    linenr_T    lnum;
    linenr_T    first, last;

    lnum = get_tv_lnum(argvars);
    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
    {
        if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
        {
            if (end)
                rettv->vval.v_number = (varnumber_T)last;
            else
                rettv->vval.v_number = (varnumber_T)first;
            return;
        }
    }
#endif
    rettv->vval.v_number = -1;
}

/*
 * "foldclosed()" function
 */
    static void
f_foldclosed(typval_T *argvars, typval_T *rettv)
{
    foldclosed_both(argvars, rettv, FALSE);
}

/*
 * "foldclosedend()" function
 */
    static void
f_foldclosedend(typval_T *argvars, typval_T *rettv)
{
    foldclosed_both(argvars, rettv, TRUE);
}

/*
 * "foldlevel()" function
 */
    static void
f_foldlevel(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_FOLDING
    linenr_T    lnum;

    lnum = get_tv_lnum(argvars);
    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
        rettv->vval.v_number = foldLevel(lnum);
#endif
}

/*
 * "foldtext()" function
 */
    static void
f_foldtext(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_FOLDING
    linenr_T    foldstart;
    linenr_T    foldend;
    char_u      *dashes;
    linenr_T    lnum;
    char_u      *s;
    char_u      *r;
    int         len;
    char        *txt;
    long        count;
#endif

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_FOLDING
    foldstart = (linenr_T)get_vim_var_nr(VV_FOLDSTART);
    foldend = (linenr_T)get_vim_var_nr(VV_FOLDEND);
    dashes = get_vim_var_str(VV_FOLDDASHES);
    if (foldstart > 0 && foldend <= curbuf->b_ml.ml_line_count
            && dashes != NULL)
    {
        /* Find first non-empty line in the fold. */
        for (lnum = foldstart; lnum < foldend; ++lnum)
            if (!linewhite(lnum))
                break;

        /* Find interesting text in this line. */
        s = skipwhite(ml_get(lnum));
        /* skip C comment-start */
        if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
        {
            s = skipwhite(s + 2);
            if (*skipwhite(s) == NUL
                            && lnum + 1 < (linenr_T)get_vim_var_nr(VV_FOLDEND))
            {
                s = skipwhite(ml_get(lnum + 1));
                if (*s == '*')
                    s = skipwhite(s + 1);
            }
        }
        count = (long)(foldend - foldstart + 1);
        txt = NGETTEXT("+-%s%3ld line: ", "+-%s%3ld lines: ", count);
        r = alloc((unsigned)(STRLEN(txt)
                    + STRLEN(dashes)        /* for %s */
                    + 20                    /* for %3ld */
                    + STRLEN(s)));          /* concatenated */
        if (r != NULL)
        {
            sprintf((char *)r, txt, dashes, count);
            len = (int)STRLEN(r);
            STRCAT(r, s);
            /* remove 'foldmarker' and 'commentstring' */
            foldtext_cleanup(r + len);
            rettv->vval.v_string = r;
        }
    }
#endif
}

/*
 * "foldtextresult(lnum)" function
 */
    static void
f_foldtextresult(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_FOLDING
    linenr_T    lnum;
    char_u      *text;
    char_u      buf[FOLD_TEXT_LEN];
    foldinfo_T  foldinfo;
    int         fold_count;
    static int  entered = FALSE;
#endif

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_FOLDING
    if (entered)
        return; /* reject recursive use */
    entered = TRUE;

    lnum = get_tv_lnum(argvars);
    /* treat illegal types and illegal string values for {lnum} the same */
    if (lnum < 0)
        lnum = 0;
    fold_count = foldedCount(curwin, lnum, &foldinfo);
    if (fold_count > 0)
    {
        text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
                                                               &foldinfo, buf);
        if (text == buf)
            text = vim_strsave(text);
        rettv->vval.v_string = text;
    }

    entered = FALSE;
#endif
}

/*
 * "foreground()" function
 */
    static void
f_foreground(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_GUI
    if (gui.in_use)
        gui_mch_set_foreground();
#else
# ifdef WIN32
    win32_set_foreground();
# endif
#endif
}

    static void
common_function(typval_T *argvars, typval_T *rettv, int is_funcref)
{
    char_u      *s;
    char_u      *name;
    int         use_string = FALSE;
    partial_T   *arg_pt = NULL;
    char_u      *trans_name = NULL;

    if (argvars[0].v_type == VAR_FUNC)
    {
        /* function(MyFunc, [arg], dict) */
        s = argvars[0].vval.v_string;
    }
    else if (argvars[0].v_type == VAR_PARTIAL
                                         && argvars[0].vval.v_partial != NULL)
    {
        /* function(dict.MyFunc, [arg]) */
        arg_pt = argvars[0].vval.v_partial;
        s = partial_name(arg_pt);
    }
    else
    {
        /* function('MyFunc', [arg], dict) */
        s = get_tv_string(&argvars[0]);
        use_string = TRUE;
    }

    if ((use_string && vim_strchr(s, AUTOLOAD_CHAR) == NULL) || is_funcref)
    {
        name = s;
        trans_name = trans_function_name(&name, FALSE,
             TFN_INT | TFN_QUIET | TFN_NO_AUTOLOAD | TFN_NO_DEREF, NULL, NULL);
        if (*name != NUL)
            s = NULL;
    }

    if (s == NULL || *s == NUL || (use_string && VIM_ISDIGIT(*s))
                                         || (is_funcref && trans_name == NULL))
        EMSG2(_(e_invarg2), use_string ? get_tv_string(&argvars[0]) : s);
    /* Don't check an autoload name for existence here. */
    else if (trans_name != NULL && (is_funcref
                                ? find_func(trans_name) == NULL
                                : !translated_function_exists(trans_name)))
        EMSG2(_("E700: Unknown function: %s"), s);
    else
    {
        int     dict_idx = 0;
        int     arg_idx = 0;
        list_T  *list = NULL;

        if (STRNCMP(s, "s:", 2) == 0 || STRNCMP(s, "<SID>", 5) == 0)
        {
            char        sid_buf[25];
            int         off = *s == 's' ? 2 : 5;

            /* Expand s: and <SID> into <SNR>nr_, so that the function can
             * also be called from another script. Using trans_function_name()
             * would also work, but some plugins depend on the name being
             * printable text. */
            sprintf(sid_buf, "<SNR>%ld_", (long)current_SID);
            name = alloc((int)(STRLEN(sid_buf) + STRLEN(s + off) + 1));
            if (name != NULL)
            {
                STRCPY(name, sid_buf);
                STRCAT(name, s + off);
            }
        }
        else
            name = vim_strsave(s);

        if (argvars[1].v_type != VAR_UNKNOWN)
        {
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                /* function(name, [args], dict) */
                arg_idx = 1;
                dict_idx = 2;
            }
            else if (argvars[1].v_type == VAR_DICT)
                /* function(name, dict) */
                dict_idx = 1;
            else
                /* function(name, [args]) */
                arg_idx = 1;
            if (dict_idx > 0)
            {
                if (argvars[dict_idx].v_type != VAR_DICT)
                {
                    EMSG(_("E922: expected a dict"));
                    vim_free(name);
                    goto theend;
                }
                if (argvars[dict_idx].vval.v_dict == NULL)
                    dict_idx = 0;
            }
            if (arg_idx > 0)
            {
                if (argvars[arg_idx].v_type != VAR_LIST)
                {
                    EMSG(_("E923: Second argument of function() must be a list or a dict"));
                    vim_free(name);
                    goto theend;
                }
                list = argvars[arg_idx].vval.v_list;
                if (list == NULL || list->lv_len == 0)
                    arg_idx = 0;
            }
        }
        if (dict_idx > 0 || arg_idx > 0 || arg_pt != NULL || is_funcref)
        {
            partial_T   *pt = (partial_T *)alloc_clear(sizeof(partial_T));

            /* result is a VAR_PARTIAL */
            if (pt == NULL)
                vim_free(name);
            else
            {
                if (arg_idx > 0 || (arg_pt != NULL && arg_pt->pt_argc > 0))
                {
                    listitem_T  *li;
                    int         i = 0;
                    int         arg_len = 0;
                    int         lv_len = 0;

                    if (arg_pt != NULL)
                        arg_len = arg_pt->pt_argc;
                    if (list != NULL)
                        lv_len = list->lv_len;
                    pt->pt_argc = arg_len + lv_len;
                    pt->pt_argv = (typval_T *)alloc(
                                              sizeof(typval_T) * pt->pt_argc);
                    if (pt->pt_argv == NULL)
                    {
                        vim_free(pt);
                        vim_free(name);
                        goto theend;
                    }
                    for (i = 0; i < arg_len; i++)
                        copy_tv(&arg_pt->pt_argv[i], &pt->pt_argv[i]);
                    if (lv_len > 0)
                        for (li = list->lv_first; li != NULL;
                                                         li = li->li_next)
                            copy_tv(&li->li_tv, &pt->pt_argv[i++]);
                }

                /* For "function(dict.func, [], dict)" and "func" is a partial
                 * use "dict".  That is backwards compatible. */
                if (dict_idx > 0)
                {
                    /* The dict is bound explicitly, pt_auto is FALSE. */
                    pt->pt_dict = argvars[dict_idx].vval.v_dict;
                    ++pt->pt_dict->dv_refcount;
                }
                else if (arg_pt != NULL)
                {
                    /* If the dict was bound automatically the result is also
                     * bound automatically. */
                    pt->pt_dict = arg_pt->pt_dict;
                    pt->pt_auto = arg_pt->pt_auto;
                    if (pt->pt_dict != NULL)
                        ++pt->pt_dict->dv_refcount;
                }

                pt->pt_refcount = 1;
                if (arg_pt != NULL && arg_pt->pt_func != NULL)
                {
                    pt->pt_func = arg_pt->pt_func;
                    func_ptr_ref(pt->pt_func);
                    vim_free(name);
                }
                else if (is_funcref)
                {
                    pt->pt_func = find_func(trans_name);
                    func_ptr_ref(pt->pt_func);
                    vim_free(name);
                }
                else
                {
                    pt->pt_name = name;
                    func_ref(name);
                }
            }
            rettv->v_type = VAR_PARTIAL;
            rettv->vval.v_partial = pt;
        }
        else
        {
            /* result is a VAR_FUNC */
            rettv->v_type = VAR_FUNC;
            rettv->vval.v_string = name;
            func_ref(name);
        }
    }
theend:
    vim_free(trans_name);
}

/*
 * "funcref()" function
 */
    static void
f_funcref(typval_T *argvars, typval_T *rettv)
{
    common_function(argvars, rettv, TRUE);
}

/*
 * "function()" function
 */
    static void
f_function(typval_T *argvars, typval_T *rettv)
{
    common_function(argvars, rettv, FALSE);
}

/*
 * "garbagecollect()" function
 */
    static void
f_garbagecollect(typval_T *argvars, typval_T *rettv UNUSED)
{
    /* This is postponed until we are back at the toplevel, because we may be
     * using Lists and Dicts internally.  E.g.: ":echo [garbagecollect()]". */
    want_garbage_collect = TRUE;

    if (argvars[0].v_type != VAR_UNKNOWN && get_tv_number(&argvars[0]) == 1)
        garbage_collect_at_exit = TRUE;
}

/*
 * "get()" function
 */
    static void
f_get(typval_T *argvars, typval_T *rettv)
{
    listitem_T  *li;
    list_T      *l;
    dictitem_T  *di;
    dict_T      *d;
    typval_T    *tv = NULL;

    if (argvars[0].v_type == VAR_LIST)
    {
        if ((l = argvars[0].vval.v_list) != NULL)
        {
            int         error = FALSE;

            li = list_find(l, (long)get_tv_number_chk(&argvars[1], &error));
            if (!error && li != NULL)
                tv = &li->li_tv;
        }
    }
    else if (argvars[0].v_type == VAR_DICT)
    {
        if ((d = argvars[0].vval.v_dict) != NULL)
        {
            di = dict_find(d, get_tv_string(&argvars[1]), -1);
            if (di != NULL)
                tv = &di->di_tv;
        }
    }
    else if (argvars[0].v_type == VAR_PARTIAL || argvars[0].v_type == VAR_FUNC)
    {
        partial_T       *pt;
        partial_T       fref_pt;

        if (argvars[0].v_type == VAR_PARTIAL)
            pt = argvars[0].vval.v_partial;
        else
        {
            vim_memset(&fref_pt, 0, sizeof(fref_pt));
            fref_pt.pt_name = argvars[0].vval.v_string;
            pt = &fref_pt;
        }

        if (pt != NULL)
        {
            char_u *what = get_tv_string(&argvars[1]);
            char_u *n;

            if (STRCMP(what, "func") == 0 || STRCMP(what, "name") == 0)
            {
                rettv->v_type = (*what == 'f' ? VAR_FUNC : VAR_STRING);
                n = partial_name(pt);
                if (n == NULL)
                    rettv->vval.v_string = NULL;
                else
                {
                    rettv->vval.v_string = vim_strsave(n);
                    if (rettv->v_type == VAR_FUNC)
                        func_ref(rettv->vval.v_string);
                }
            }
            else if (STRCMP(what, "dict") == 0)
                rettv_dict_set(rettv, pt->pt_dict);
            else if (STRCMP(what, "args") == 0)
            {
                rettv->v_type = VAR_LIST;
                if (rettv_list_alloc(rettv) == OK)
                {
                    int i;

                    for (i = 0; i < pt->pt_argc; ++i)
                        list_append_tv(rettv->vval.v_list, &pt->pt_argv[i]);
                }
            }
            else
                EMSG2(_(e_invarg2), what);
            return;
        }
    }
    else
        EMSG2(_(e_listdictarg), "get()");

    if (tv == NULL)
    {
        if (argvars[2].v_type != VAR_UNKNOWN)
            copy_tv(&argvars[2], rettv);
    }
    else
        copy_tv(tv, rettv);
}

#ifdef FEAT_SIGNS
/*
 * Returns information about signs placed in a buffer as list of dicts.
 */
    static void
get_buffer_signs(buf_T *buf, list_T *l)
{
    signlist_T  *sign;

    for (sign = buf->b_signlist; sign; sign = sign->next)
    {
        dict_T *d = dict_alloc();

        if (d != NULL)
        {
            dict_add_nr_str(d, "id", sign->id, NULL);
            dict_add_nr_str(d, "lnum", sign->lnum, NULL);
            dict_add_nr_str(d, "name", 0L, sign_typenr2name(sign->typenr));

            list_append_dict(l, d);
        }
    }
}
#endif

/*
 * Returns buffer options, variables and other attributes in a dictionary.
 */
    static dict_T *
get_buffer_info(buf_T *buf)
{
    dict_T      *dict;
    tabpage_T   *tp;
    win_T       *wp;
    list_T      *windows;

    dict = dict_alloc();
    if (dict == NULL)
        return NULL;

    dict_add_nr_str(dict, "bufnr", buf->b_fnum, NULL);
    dict_add_nr_str(dict, "name", 0L,
            buf->b_ffname != NULL ? buf->b_ffname : (char_u *)"");
    dict_add_nr_str(dict, "lnum", buf == curbuf ? curwin->w_cursor.lnum
                                                : buflist_findlnum(buf), NULL);
    dict_add_nr_str(dict, "loaded", buf->b_ml.ml_mfp != NULL, NULL);
    dict_add_nr_str(dict, "listed", buf->b_p_bl, NULL);
    dict_add_nr_str(dict, "changed", bufIsChanged(buf), NULL);
    dict_add_nr_str(dict, "changedtick", CHANGEDTICK(buf), NULL);
    dict_add_nr_str(dict, "hidden",
                    buf->b_ml.ml_mfp != NULL && buf->b_nwindows == 0,
                    NULL);

    /* Get a reference to buffer variables */
    dict_add_dict(dict, "variables", buf->b_vars);

    /* List of windows displaying this buffer */
    windows = list_alloc();
    if (windows != NULL)
    {
        FOR_ALL_TAB_WINDOWS(tp, wp)
            if (wp->w_buffer == buf)
                list_append_number(windows, (varnumber_T)wp->w_id);
        dict_add_list(dict, "windows", windows);
    }

#ifdef FEAT_SIGNS
    if (buf->b_signlist != NULL)
    {
        /* List of signs placed in this buffer */
        list_T  *signs = list_alloc();
        if (signs != NULL)
        {
            get_buffer_signs(buf, signs);
            dict_add_list(dict, "signs", signs);
        }
    }
#endif

    return dict;
}

/*
 * "getbufinfo()" function
 */
    static void
f_getbufinfo(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf = NULL;
    buf_T       *argbuf = NULL;
    dict_T      *d;
    int         filtered = FALSE;
    int         sel_buflisted = FALSE;
    int         sel_bufloaded = FALSE;
    int         sel_bufmodified = FALSE;

    if (rettv_list_alloc(rettv) != OK)
        return;

    /* List of all the buffers or selected buffers */
    if (argvars[0].v_type == VAR_DICT)
    {
        dict_T  *sel_d = argvars[0].vval.v_dict;

        if (sel_d != NULL)
        {
            dictitem_T  *di;

            filtered = TRUE;

            di = dict_find(sel_d, (char_u *)"buflisted", -1);
            if (di != NULL && get_tv_number(&di->di_tv))
                sel_buflisted = TRUE;

            di = dict_find(sel_d, (char_u *)"bufloaded", -1);
            if (di != NULL && get_tv_number(&di->di_tv))
                sel_bufloaded = TRUE;

            di = dict_find(sel_d, (char_u *)"bufmodified", -1);
            if (di != NULL && get_tv_number(&di->di_tv))
                sel_bufmodified = TRUE;
        }
    }
    else if (argvars[0].v_type != VAR_UNKNOWN)
    {
        /* Information about one buffer.  Argument specifies the buffer */
        (void)get_tv_number(&argvars[0]);   /* issue errmsg if type error */
        ++emsg_off;
        argbuf = get_buf_tv(&argvars[0], FALSE);
        --emsg_off;
        if (argbuf == NULL)
            return;
    }

    /* Return information about all the buffers or a specified buffer */
    FOR_ALL_BUFFERS(buf)
    {
        if (argbuf != NULL && argbuf != buf)
            continue;
        if (filtered && ((sel_bufloaded && buf->b_ml.ml_mfp == NULL)
                        || (sel_buflisted && !buf->b_p_bl)
                        || (sel_bufmodified && !buf->b_changed)))
            continue;

        d = get_buffer_info(buf);
        if (d != NULL)
            list_append_dict(rettv->vval.v_list, d);
        if (argbuf != NULL)
            return;
    }
}

static void get_buffer_lines(buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv);

/*
 * Get line or list of lines from buffer "buf" into "rettv".
 * Return a range (from start to end) of lines in rettv from the specified
 * buffer.
 * If 'retlist' is TRUE, then the lines are returned as a Vim List.
 */
    static void
get_buffer_lines(
    buf_T       *buf,
    linenr_T    start,
    linenr_T    end,
    int         retlist,
    typval_T    *rettv)
{
    char_u      *p;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
    if (retlist && rettv_list_alloc(rettv) == FAIL)
        return;

    if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
        return;

    if (!retlist)
    {
        if (start >= 1 && start <= buf->b_ml.ml_line_count)
            p = ml_get_buf(buf, start, FALSE);
        else
            p = (char_u *)"";
        rettv->vval.v_string = vim_strsave(p);
    }
    else
    {
        if (end < start)
            return;

        if (start < 1)
            start = 1;
        if (end > buf->b_ml.ml_line_count)
            end = buf->b_ml.ml_line_count;
        while (start <= end)
            if (list_append_string(rettv->vval.v_list,
                                 ml_get_buf(buf, start++, FALSE), -1) == FAIL)
                break;
    }
}

/*
 * Get the lnum from the first argument.
 * Also accepts "$", then "buf" is used.
 * Returns 0 on error.
 */
    static linenr_T
get_tv_lnum_buf(typval_T *argvars, buf_T *buf)
{
    if (argvars[0].v_type == VAR_STRING
            && argvars[0].vval.v_string != NULL
            && argvars[0].vval.v_string[0] == '$'
            && buf != NULL)
        return buf->b_ml.ml_line_count;
    return (linenr_T)get_tv_number_chk(&argvars[0], NULL);
}

/*
 * "getbufline()" function
 */
    static void
f_getbufline(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum;
    linenr_T    end;
    buf_T       *buf;

    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], FALSE);
    --emsg_off;

    lnum = get_tv_lnum_buf(&argvars[1], buf);
    if (argvars[2].v_type == VAR_UNKNOWN)
        end = lnum;
    else
        end = get_tv_lnum_buf(&argvars[2], buf);

    get_buffer_lines(buf, lnum, end, TRUE, rettv);
}

/*
 * "getbufvar()" function
 */
    static void
f_getbufvar(typval_T *argvars, typval_T *rettv)
{
    buf_T       *buf;
    buf_T       *save_curbuf;
    char_u      *varname;
    dictitem_T  *v;
    int         done = FALSE;

    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    varname = get_tv_string_chk(&argvars[1]);
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], FALSE);

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    if (buf != NULL && varname != NULL)
    {
        /* set curbuf to be our buf, temporarily */
        save_curbuf = curbuf;
        curbuf = buf;

        if (*varname == '&')
        {
            if (varname[1] == NUL)
            {
                /* get all buffer-local options in a dict */
                dict_T  *opts = get_winbuf_options(TRUE);

                if (opts != NULL)
                {
                    rettv_dict_set(rettv, opts);
                    done = TRUE;
                }
            }
            else if (get_option_tv(&varname, rettv, TRUE) == OK)
                /* buffer-local-option */
                done = TRUE;
        }
        else
        {
            /* Look up the variable. */
            /* Let getbufvar({nr}, "") return the "b:" dictionary. */
            v = find_var_in_ht(&curbuf->b_vars->dv_hashtab,
                                                         'b', varname, FALSE);
            if (v != NULL)
            {
                copy_tv(&v->di_tv, rettv);
                done = TRUE;
            }
        }

        /* restore previous notion of curbuf */
        curbuf = save_curbuf;
    }

    if (!done && argvars[2].v_type != VAR_UNKNOWN)
        /* use the default value */
        copy_tv(&argvars[2], rettv);

    --emsg_off;
}

/*
 * "getchangelist()" function
 */
    static void
f_getchangelist(typval_T *argvars, typval_T *rettv)
{
#ifdef FEAT_JUMPLIST
    buf_T       *buf;
    int         i;
    list_T      *l;
    dict_T      *d;
#endif

    if (rettv_list_alloc(rettv) != OK)
        return;

#ifdef FEAT_JUMPLIST
    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    ++emsg_off;
    buf = get_buf_tv(&argvars[0], FALSE);
    --emsg_off;
    if (buf == NULL)
        return;

    l = list_alloc();
    if (l == NULL)
        return;

    if (list_append_list(rettv->vval.v_list, l) == FAIL)
        return;
    /*
     * The current window change list index tracks only the position in the
     * current buffer change list. For other buffers, use the change list
     * length as the current index.
     */
    list_append_number(rettv->vval.v_list,
            (varnumber_T)((buf == curwin->w_buffer)
                ? curwin->w_changelistidx : buf->b_changelistlen));

    for (i = 0; i < buf->b_changelistlen; ++i)
    {
        if (buf->b_changelist[i].lnum == 0)
            continue;
        if ((d = dict_alloc()) == NULL)
            return;
        if (list_append_dict(l, d) == FAIL)
            return;
        dict_add_nr_str(d, "lnum", (long)buf->b_changelist[i].lnum, NULL);
        dict_add_nr_str(d, "col", (long)buf->b_changelist[i].col, NULL);
# ifdef FEAT_VIRTUALEDIT
        dict_add_nr_str(d, "coladd", (long)buf->b_changelist[i].coladd, NULL);
# endif
    }
#endif
}
/*
 * "getchar()" function
 */
    static void
f_getchar(typval_T *argvars, typval_T *rettv)
{
    varnumber_T         n;
    int                 error = FALSE;

    /* Position the cursor.  Needed after a message that ends in a space. */
    windgoto(msg_row, msg_col);

    ++no_mapping;
    ++allow_keys;
    for (;;)
    {
        if (argvars[0].v_type == VAR_UNKNOWN)
            /* getchar(): blocking wait. */
            n = plain_vgetc();
        else if (get_tv_number_chk(&argvars[0], &error) == 1)
            /* getchar(1): only check if char avail */
            n = vpeekc_any();
        else if (error || vpeekc_any() == NUL)
            /* illegal argument or getchar(0) and no char avail: return zero */
            n = 0;
        else
            /* getchar(0) and char avail: return char */
            n = plain_vgetc();

        if (n == K_IGNORE)
            continue;
        break;
    }
    --no_mapping;
    --allow_keys;

    set_vim_var_nr(VV_MOUSE_WIN, 0);
    set_vim_var_nr(VV_MOUSE_WINID, 0);
    set_vim_var_nr(VV_MOUSE_LNUM, 0);
    set_vim_var_nr(VV_MOUSE_COL, 0);

    rettv->vval.v_number = n;
    if (IS_SPECIAL(n) || mod_mask != 0)
    {
        char_u          temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
        int             i = 0;

        /* Turn a special key into three bytes, plus modifier. */
        if (mod_mask != 0)
        {
            temp[i++] = K_SPECIAL;
            temp[i++] = KS_MODIFIER;
            temp[i++] = mod_mask;
        }
        if (IS_SPECIAL(n))
        {
            temp[i++] = K_SPECIAL;
            temp[i++] = K_SECOND(n);
            temp[i++] = K_THIRD(n);
        }
#ifdef FEAT_MBYTE
        else if (has_mbyte)
            i += (*mb_char2bytes)(n, temp + i);
#endif
        else
            temp[i++] = n;
        temp[i++] = NUL;
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = vim_strsave(temp);

#ifdef FEAT_MOUSE
        if (is_mouse_key(n))
        {
            int         row = mouse_row;
            int         col = mouse_col;
            win_T       *win;
            linenr_T    lnum;
            win_T       *wp;
            int         winnr = 1;

            if (row >= 0 && col >= 0)
            {
                /* Find the window at the mouse coordinates and compute the
                 * text position. */
                win = mouse_find_win(&row, &col);
                if (win == NULL)
                    return;
                (void)mouse_comp_pos(win, &row, &col, &lnum);
                for (wp = firstwin; wp != win; wp = wp->w_next)
                    ++winnr;
                set_vim_var_nr(VV_MOUSE_WIN, winnr);
                set_vim_var_nr(VV_MOUSE_WINID, win->w_id);
                set_vim_var_nr(VV_MOUSE_LNUM, lnum);
                set_vim_var_nr(VV_MOUSE_COL, col + 1);
            }
        }
#endif
    }
}

/*
 * "getcharmod()" function
 */
    static void
f_getcharmod(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = mod_mask;
}

/*
 * "getcharsearch()" function
 */
    static void
f_getcharsearch(typval_T *argvars UNUSED, typval_T *rettv)
{
    if (rettv_dict_alloc(rettv) != FAIL)
    {
        dict_T *dict = rettv->vval.v_dict;

        dict_add_nr_str(dict, "char", 0L, last_csearch());
        dict_add_nr_str(dict, "forward", last_csearch_forward(), NULL);
        dict_add_nr_str(dict, "until", last_csearch_until(), NULL);
    }
}

/*
 * "getcmdline()" function
 */
    static void
f_getcmdline(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = get_cmdline_str();
}

/*
 * "getcmdpos()" function
 */
    static void
f_getcmdpos(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = get_cmdline_pos() + 1;
}

/*
 * "getcmdtype()" function
 */
    static void
f_getcmdtype(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = alloc(2);
    if (rettv->vval.v_string != NULL)
    {
        rettv->vval.v_string[0] = get_cmdline_type();
        rettv->vval.v_string[1] = NUL;
    }
}

/*
 * "getcmdwintype()" function
 */
    static void
f_getcmdwintype(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_CMDWIN
    rettv->vval.v_string = alloc(2);
    if (rettv->vval.v_string != NULL)
    {
        rettv->vval.v_string[0] = cmdwin_type;
        rettv->vval.v_string[1] = NUL;
    }
#endif
}

#if defined(FEAT_CMDL_COMPL)
/*
 * "getcompletion()" function
 */
    static void
f_getcompletion(typval_T *argvars, typval_T *rettv)
{
    char_u      *pat;
    expand_T    xpc;
    int         filtered = FALSE;
    int         options = WILD_SILENT | WILD_USE_NL | WILD_ADD_SLASH
                                        | WILD_NO_BEEP;

    if (argvars[2].v_type != VAR_UNKNOWN)
        filtered = get_tv_number_chk(&argvars[2], NULL);

    if (p_wic)
        options |= WILD_ICASE;

    /* For filtered results, 'wildignore' is used */
    if (!filtered)
        options |= WILD_KEEP_ALL;

    ExpandInit(&xpc);
    xpc.xp_pattern = get_tv_string(&argvars[0]);
    xpc.xp_pattern_len = (int)STRLEN(xpc.xp_pattern);
    xpc.xp_context = cmdcomplete_str_to_type(get_tv_string(&argvars[1]));
    if (xpc.xp_context == EXPAND_NOTHING)
    {
        if (argvars[1].v_type == VAR_STRING)
            EMSG2(_(e_invarg2), argvars[1].vval.v_string);
        else
            EMSG(_(e_invarg));
        return;
    }

# if defined(FEAT_MENU)
    if (xpc.xp_context == EXPAND_MENUS)
    {
        set_context_in_menu_cmd(&xpc, (char_u *)"menu", xpc.xp_pattern, FALSE);
        xpc.xp_pattern_len = (int)STRLEN(xpc.xp_pattern);
    }
# endif
#ifdef FEAT_CSCOPE
    if (xpc.xp_context == EXPAND_CSCOPE)
    {
        set_context_in_cscope_cmd(&xpc, xpc.xp_pattern, CMD_cscope);
        xpc.xp_pattern_len = (int)STRLEN(xpc.xp_pattern);
    }
#endif
#ifdef FEAT_SIGNS
    if (xpc.xp_context == EXPAND_SIGN)
    {
        set_context_in_sign_cmd(&xpc, xpc.xp_pattern);
        xpc.xp_pattern_len = (int)STRLEN(xpc.xp_pattern);
    }
#endif

    pat = addstar(xpc.xp_pattern, xpc.xp_pattern_len, xpc.xp_context);
    if ((rettv_list_alloc(rettv) != FAIL) && (pat != NULL))
    {
        int     i;

        ExpandOne(&xpc, pat, NULL, options, WILD_ALL_KEEP);

        for (i = 0; i < xpc.xp_numfiles; i++)
            list_append_string(rettv->vval.v_list, xpc.xp_files[i], -1);
    }
    vim_free(pat);
    ExpandCleanup(&xpc);
}
#endif

/*
 * "getcwd()" function
 */
    static void
f_getcwd(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp = NULL;
    char_u      *cwd;
    int         global = FALSE;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    if (argvars[0].v_type == VAR_NUMBER && argvars[0].vval.v_number == -1)
        global = TRUE;
    else
        wp = find_tabwin(&argvars[0], &argvars[1]);

    if (wp != NULL && wp->w_localdir != NULL)
        rettv->vval.v_string = vim_strsave(wp->w_localdir);
    else if (wp != NULL || global)
    {
        if (globaldir != NULL)
            rettv->vval.v_string = vim_strsave(globaldir);
        else
        {
            cwd = alloc(MAXPATHL);
            if (cwd != NULL)
            {
                if (mch_dirname(cwd, MAXPATHL) != FAIL)
                    rettv->vval.v_string = vim_strsave(cwd);
                vim_free(cwd);
            }
        }
#ifdef BACKSLASH_IN_FILENAME
        if (rettv->vval.v_string != NULL)
            slash_adjust(rettv->vval.v_string);
#endif
    }
}

/*
 * "getfontname()" function
 */
    static void
f_getfontname(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_GUI
    if (gui.in_use)
    {
        GuiFont font;
        char_u  *name = NULL;

        if (argvars[0].v_type == VAR_UNKNOWN)
        {
            /* Get the "Normal" font.  Either the name saved by
             * hl_set_font_name() or from the font ID. */
            font = gui.norm_font;
            name = hl_get_font_name();
        }
        else
        {
            name = get_tv_string(&argvars[0]);
            if (STRCMP(name, "*") == 0)     /* don't use font dialog */
                return;
            font = gui_mch_get_font(name, FALSE);
            if (font == NOFONT)
                return;     /* Invalid font name, return empty string. */
        }
        rettv->vval.v_string = gui_mch_get_fontname(font, name);
        if (argvars[0].v_type != VAR_UNKNOWN)
            gui_mch_free_font(font);
    }
#endif
}

/*
 * "getfperm({fname})" function
 */
    static void
f_getfperm(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    stat_T      st;
    char_u      *perm = NULL;
    char_u      flags[] = "rwx";
    int         i;

    fname = get_tv_string(&argvars[0]);

    rettv->v_type = VAR_STRING;
    if (mch_stat((char *)fname, &st) >= 0)
    {
        perm = vim_strsave((char_u *)"---------");
        if (perm != NULL)
        {
            for (i = 0; i < 9; i++)
            {
                if (st.st_mode & (1 << (8 - i)))
                    perm[i] = flags[i % 3];
            }
        }
    }
    rettv->vval.v_string = perm;
}

/*
 * "getfsize({fname})" function
 */
    static void
f_getfsize(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    stat_T      st;

    fname = get_tv_string(&argvars[0]);

    rettv->v_type = VAR_NUMBER;

    if (mch_stat((char *)fname, &st) >= 0)
    {
        if (mch_isdir(fname))
            rettv->vval.v_number = 0;
        else
        {
            rettv->vval.v_number = (varnumber_T)st.st_size;

            /* non-perfect check for overflow */
            if ((off_T)rettv->vval.v_number != (off_T)st.st_size)
                rettv->vval.v_number = -2;
        }
    }
    else
          rettv->vval.v_number = -1;
}

/*
 * "getftime({fname})" function
 */
    static void
f_getftime(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    stat_T      st;

    fname = get_tv_string(&argvars[0]);

    if (mch_stat((char *)fname, &st) >= 0)
        rettv->vval.v_number = (varnumber_T)st.st_mtime;
    else
        rettv->vval.v_number = -1;
}

/*
 * "getftype({fname})" function
 */
    static void
f_getftype(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    stat_T      st;
    char_u      *type = NULL;
    char        *t;

    fname = get_tv_string(&argvars[0]);

    rettv->v_type = VAR_STRING;
    if (mch_lstat((char *)fname, &st) >= 0)
    {
#ifdef S_ISREG
        if (S_ISREG(st.st_mode))
            t = "file";
        else if (S_ISDIR(st.st_mode))
            t = "dir";
# ifdef S_ISLNK
        else if (S_ISLNK(st.st_mode))
            t = "link";
# endif
# ifdef S_ISBLK
        else if (S_ISBLK(st.st_mode))
            t = "bdev";
# endif
# ifdef S_ISCHR
        else if (S_ISCHR(st.st_mode))
            t = "cdev";
# endif
# ifdef S_ISFIFO
        else if (S_ISFIFO(st.st_mode))
            t = "fifo";
# endif
# ifdef S_ISSOCK
        else if (S_ISSOCK(st.st_mode))
            t = "fifo";
# endif
        else
            t = "other";
#else
# ifdef S_IFMT
        switch (st.st_mode & S_IFMT)
        {
            case S_IFREG: t = "file"; break;
            case S_IFDIR: t = "dir"; break;
#  ifdef S_IFLNK
            case S_IFLNK: t = "link"; break;
#  endif
#  ifdef S_IFBLK
            case S_IFBLK: t = "bdev"; break;
#  endif
#  ifdef S_IFCHR
            case S_IFCHR: t = "cdev"; break;
#  endif
#  ifdef S_IFIFO
            case S_IFIFO: t = "fifo"; break;
#  endif
#  ifdef S_IFSOCK
            case S_IFSOCK: t = "socket"; break;
#  endif
            default: t = "other";
        }
# else
        if (mch_isdir(fname))
            t = "dir";
        else
            t = "file";
# endif
#endif
        type = vim_strsave((char_u *)t);
    }
    rettv->vval.v_string = type;
}

/*
 * "getjumplist()" function
 */
    static void
f_getjumplist(typval_T *argvars, typval_T *rettv)
{
#ifdef FEAT_JUMPLIST
    win_T       *wp;
    int         i;
    list_T      *l;
    dict_T      *d;
#endif

    if (rettv_list_alloc(rettv) != OK)
        return;

#ifdef FEAT_JUMPLIST
    wp = find_tabwin(&argvars[0], &argvars[1]);
    if (wp == NULL)
        return;

    l = list_alloc();
    if (l == NULL)
        return;

    if (list_append_list(rettv->vval.v_list, l) == FAIL)
        return;
    list_append_number(rettv->vval.v_list, (varnumber_T)wp->w_jumplistidx);

    cleanup_jumplist(wp, TRUE);

    for (i = 0; i < wp->w_jumplistlen; ++i)
    {
        if (wp->w_jumplist[i].fmark.mark.lnum == 0)
            continue;
        if ((d = dict_alloc()) == NULL)
            return;
        if (list_append_dict(l, d) == FAIL)
            return;
        dict_add_nr_str(d, "lnum", (long)wp->w_jumplist[i].fmark.mark.lnum,
                NULL);
        dict_add_nr_str(d, "col", (long)wp->w_jumplist[i].fmark.mark.col,
                NULL);
# ifdef FEAT_VIRTUALEDIT
        dict_add_nr_str(d, "coladd", (long)wp->w_jumplist[i].fmark.mark.coladd,
                NULL);
# endif
        dict_add_nr_str(d, "bufnr", (long)wp->w_jumplist[i].fmark.fnum, NULL);
        if (wp->w_jumplist[i].fname != NULL)
            dict_add_nr_str(d, "filename", 0L, wp->w_jumplist[i].fname);
    }
#endif
}

/*
 * "getline(lnum, [end])" function
 */
    static void
f_getline(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum;
    linenr_T    end;
    int         retlist;

    lnum = get_tv_lnum(argvars);
    if (argvars[1].v_type == VAR_UNKNOWN)
    {
        end = 0;
        retlist = FALSE;
    }
    else
    {
        end = get_tv_lnum(&argvars[1]);
        retlist = TRUE;
    }

    get_buffer_lines(curbuf, lnum, end, retlist, rettv);
}

#ifdef FEAT_QUICKFIX
    static void
get_qf_loc_list(int is_qf, win_T *wp, typval_T *what_arg, typval_T *rettv)
{
    if (what_arg->v_type == VAR_UNKNOWN)
    {
        if (rettv_list_alloc(rettv) == OK)
            if (is_qf || wp != NULL)
                (void)get_errorlist(NULL, wp, -1, rettv->vval.v_list);
    }
    else
    {
        if (rettv_dict_alloc(rettv) == OK)
            if (is_qf || (wp != NULL))
            {
                if (what_arg->v_type == VAR_DICT)
                {
                    dict_T      *d = what_arg->vval.v_dict;

                    if (d != NULL)
                        qf_get_properties(wp, d, rettv->vval.v_dict);
                }
                else
                    EMSG(_(e_dictreq));
            }
    }
}
#endif

/*
 * "getloclist()" function
 */
    static void
f_getloclist(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_QUICKFIX
    win_T       *wp;

    wp = find_win_by_nr(&argvars[0], NULL);
    get_qf_loc_list(FALSE, wp, &argvars[1], rettv);
#endif
}

/*
 * "getmatches()" function
 */
    static void
f_getmatches(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    dict_T      *dict;
    matchitem_T *cur = curwin->w_match_head;
    int         i;

    if (rettv_list_alloc(rettv) == OK)
    {
        while (cur != NULL)
        {
            dict = dict_alloc();
            if (dict == NULL)
                return;
            if (cur->match.regprog == NULL)
            {
                /* match added with matchaddpos() */
                for (i = 0; i < MAXPOSMATCH; ++i)
                {
                    llpos_T     *llpos;
                    char        buf[6];
                    list_T      *l;

                    llpos = &cur->pos.pos[i];
                    if (llpos->lnum == 0)
                        break;
                    l = list_alloc();
                    if (l == NULL)
                        break;
                    list_append_number(l, (varnumber_T)llpos->lnum);
                    if (llpos->col > 0)
                    {
                        list_append_number(l, (varnumber_T)llpos->col);
                        list_append_number(l, (varnumber_T)llpos->len);
                    }
                    sprintf(buf, "pos%d", i + 1);
                    dict_add_list(dict, buf, l);
                }
            }
            else
            {
                dict_add_nr_str(dict, "pattern", 0L, cur->pattern);
            }
            dict_add_nr_str(dict, "group", 0L, syn_id2name(cur->hlg_id));
            dict_add_nr_str(dict, "priority", (long)cur->priority, NULL);
            dict_add_nr_str(dict, "id", (long)cur->id, NULL);
# if defined(FEAT_CONCEAL) && defined(FEAT_MBYTE)
            if (cur->conceal_char)
            {
                char_u buf[MB_MAXBYTES + 1];

                buf[(*mb_char2bytes)((int)cur->conceal_char, buf)] = NUL;
                dict_add_nr_str(dict, "conceal", 0L, (char_u *)&buf);
            }
# endif
            list_append_dict(rettv->vval.v_list, dict);
            cur = cur->next;
        }
    }
#endif
}

/*
 * "getpid()" function
 */
    static void
f_getpid(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = mch_get_pid();
}

    static void
getpos_both(
    typval_T    *argvars,
    typval_T    *rettv,
    int         getcurpos)
{
    pos_T       *fp;
    list_T      *l;
    int         fnum = -1;

    if (rettv_list_alloc(rettv) == OK)
    {
        l = rettv->vval.v_list;
        if (getcurpos)
            fp = &curwin->w_cursor;
        else
            fp = var2fpos(&argvars[0], TRUE, &fnum);
        if (fnum != -1)
            list_append_number(l, (varnumber_T)fnum);
        else
            list_append_number(l, (varnumber_T)0);
        list_append_number(l, (fp != NULL) ? (varnumber_T)fp->lnum
                                                            : (varnumber_T)0);
        list_append_number(l, (fp != NULL)
                     ? (varnumber_T)(fp->col == MAXCOL ? MAXCOL : fp->col + 1)
                                                            : (varnumber_T)0);
        list_append_number(l,
#ifdef FEAT_VIRTUALEDIT
                                (fp != NULL) ? (varnumber_T)fp->coladd :
#endif
                                                              (varnumber_T)0);
        if (getcurpos)
        {
            update_curswant();
            list_append_number(l, curwin->w_curswant == MAXCOL ?
                    (varnumber_T)MAXCOL : (varnumber_T)curwin->w_curswant + 1);
        }
    }
    else
        rettv->vval.v_number = FALSE;
}


/*
 * "getcurpos()" function
 */
    static void
f_getcurpos(typval_T *argvars, typval_T *rettv)
{
    getpos_both(argvars, rettv, TRUE);
}

/*
 * "getpos(string)" function
 */
    static void
f_getpos(typval_T *argvars, typval_T *rettv)
{
    getpos_both(argvars, rettv, FALSE);
}

/*
 * "getqflist()" function
 */
    static void
f_getqflist(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_QUICKFIX
    get_qf_loc_list(TRUE, NULL, &argvars[0], rettv);
#endif
}

/*
 * "getreg()" function
 */
    static void
f_getreg(typval_T *argvars, typval_T *rettv)
{
    char_u      *strregname;
    int         regname;
    int         arg2 = FALSE;
    int         return_list = FALSE;
    int         error = FALSE;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        strregname = get_tv_string_chk(&argvars[0]);
        error = strregname == NULL;
        if (argvars[1].v_type != VAR_UNKNOWN)
        {
            arg2 = (int)get_tv_number_chk(&argvars[1], &error);
            if (!error && argvars[2].v_type != VAR_UNKNOWN)
                return_list = (int)get_tv_number_chk(&argvars[2], &error);
        }
    }
    else
        strregname = get_vim_var_str(VV_REG);

    if (error)
        return;

    regname = (strregname == NULL ? '"' : *strregname);
    if (regname == 0)
        regname = '"';

    if (return_list)
    {
        rettv->v_type = VAR_LIST;
        rettv->vval.v_list = (list_T *)get_reg_contents(regname,
                                      (arg2 ? GREG_EXPR_SRC : 0) | GREG_LIST);
        if (rettv->vval.v_list == NULL)
            (void)rettv_list_alloc(rettv);
        else
            ++rettv->vval.v_list->lv_refcount;
    }
    else
    {
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = get_reg_contents(regname,
                                                    arg2 ? GREG_EXPR_SRC : 0);
    }
}

/*
 * "getregtype()" function
 */
    static void
f_getregtype(typval_T *argvars, typval_T *rettv)
{
    char_u      *strregname;
    int         regname;
    char_u      buf[NUMBUFLEN + 2];
    long        reglen = 0;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        strregname = get_tv_string_chk(&argvars[0]);
        if (strregname == NULL)     /* type error; errmsg already given */
        {
            rettv->v_type = VAR_STRING;
            rettv->vval.v_string = NULL;
            return;
        }
    }
    else
        /* Default to v:register */
        strregname = get_vim_var_str(VV_REG);

    regname = (strregname == NULL ? '"' : *strregname);
    if (regname == 0)
        regname = '"';

    buf[0] = NUL;
    buf[1] = NUL;
    switch (get_reg_type(regname, &reglen))
    {
        case MLINE: buf[0] = 'V'; break;
        case MCHAR: buf[0] = 'v'; break;
        case MBLOCK:
                buf[0] = Ctrl_V;
                sprintf((char *)buf + 1, "%ld", reglen + 1);
                break;
    }
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_strsave(buf);
}

/*
 * Returns information (variables, options, etc.) about a tab page
 * as a dictionary.
 */
    static dict_T *
get_tabpage_info(tabpage_T *tp, int tp_idx)
{
    win_T       *wp;
    dict_T      *dict;
    list_T      *l;

    dict = dict_alloc();
    if (dict == NULL)
        return NULL;

    dict_add_nr_str(dict, "tabnr", tp_idx, NULL);

    l = list_alloc();
    if (l != NULL)
    {
        for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
                wp; wp = wp->w_next)
            list_append_number(l, (varnumber_T)wp->w_id);
        dict_add_list(dict, "windows", l);
    }

    /* Make a reference to tabpage variables */
    dict_add_dict(dict, "variables", tp->tp_vars);

    return dict;
}

/*
 * "gettabinfo()" function
 */
    static void
f_gettabinfo(typval_T *argvars, typval_T *rettv)
{
    tabpage_T   *tp, *tparg = NULL;
    dict_T      *d;
    int         tpnr = 0;

    if (rettv_list_alloc(rettv) != OK)
        return;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        /* Information about one tab page */
        tparg = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
        if (tparg == NULL)
            return;
    }

    /* Get information about a specific tab page or all tab pages */
    FOR_ALL_TABPAGES(tp)
    {
        tpnr++;
        if (tparg != NULL && tp != tparg)
            continue;
        d = get_tabpage_info(tp, tpnr);
        if (d != NULL)
            list_append_dict(rettv->vval.v_list, d);
        if (tparg != NULL)
            return;
    }
}

/*
 * "gettabvar()" function
 */
    static void
f_gettabvar(typval_T *argvars, typval_T *rettv)
{
    win_T       *oldcurwin;
    tabpage_T   *tp, *oldtabpage;
    dictitem_T  *v;
    char_u      *varname;
    int         done = FALSE;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    varname = get_tv_string_chk(&argvars[1]);
    tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
    if (tp != NULL && varname != NULL)
    {
        /* Set tp to be our tabpage, temporarily.  Also set the window to the
         * first window in the tabpage, otherwise the window is not valid. */
        if (switch_win(&oldcurwin, &oldtabpage,
                tp == curtab || tp->tp_firstwin == NULL ? firstwin
                                            : tp->tp_firstwin, tp, TRUE) == OK)
        {
            /* look up the variable */
            /* Let gettabvar({nr}, "") return the "t:" dictionary. */
            v = find_var_in_ht(&tp->tp_vars->dv_hashtab, 't', varname, FALSE);
            if (v != NULL)
            {
                copy_tv(&v->di_tv, rettv);
                done = TRUE;
            }
        }

        /* restore previous notion of curwin */
        restore_win(oldcurwin, oldtabpage, TRUE);
    }

    if (!done && argvars[2].v_type != VAR_UNKNOWN)
        copy_tv(&argvars[2], rettv);
}

/*
 * "gettabwinvar()" function
 */
    static void
f_gettabwinvar(typval_T *argvars, typval_T *rettv)
{
    getwinvar(argvars, rettv, 1);
}

/*
 * Returns information about a window as a dictionary.
 */
    static dict_T *
get_win_info(win_T *wp, short tpnr, short winnr)
{
    dict_T      *dict;

    dict = dict_alloc();
    if (dict == NULL)
        return NULL;

    dict_add_nr_str(dict, "tabnr", tpnr, NULL);
    dict_add_nr_str(dict, "winnr", winnr, NULL);
    dict_add_nr_str(dict, "winid", wp->w_id, NULL);
    dict_add_nr_str(dict, "height", wp->w_height, NULL);
#ifdef FEAT_MENU
    dict_add_nr_str(dict, "winbar", wp->w_winbar_height, NULL);
#endif
    dict_add_nr_str(dict, "width", wp->w_width, NULL);
    dict_add_nr_str(dict, "bufnr", wp->w_buffer->b_fnum, NULL);

#ifdef FEAT_TERMINAL
    dict_add_nr_str(dict, "terminal", bt_terminal(wp->w_buffer), NULL);
#endif
#ifdef FEAT_QUICKFIX
    dict_add_nr_str(dict, "quickfix", bt_quickfix(wp->w_buffer), NULL);
    dict_add_nr_str(dict, "loclist",
            (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL), NULL);
#endif

    /* Add a reference to window variables */
    dict_add_dict(dict, "variables", wp->w_vars);

    return dict;
}

/*
 * "getwininfo()" function
 */
    static void
f_getwininfo(typval_T *argvars, typval_T *rettv)
{
    tabpage_T   *tp;
    win_T       *wp = NULL, *wparg = NULL;
    dict_T      *d;
    short       tabnr = 0, winnr;

    if (rettv_list_alloc(rettv) != OK)
        return;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        wparg = win_id2wp(argvars);
        if (wparg == NULL)
            return;
    }

    /* Collect information about either all the windows across all the tab
     * pages or one particular window.
     */
    FOR_ALL_TABPAGES(tp)
    {
        tabnr++;
        winnr = 0;
        FOR_ALL_WINDOWS_IN_TAB(tp, wp)
        {
            winnr++;
            if (wparg != NULL && wp != wparg)
                continue;
            d = get_win_info(wp, tabnr, winnr);
            if (d != NULL)
                list_append_dict(rettv->vval.v_list, d);
            if (wparg != NULL)
                /* found information about a specific window */
                return;
        }
    }
}

/*
 * "win_findbuf()" function
 */
    static void
f_win_findbuf(typval_T *argvars, typval_T *rettv)
{
    if (rettv_list_alloc(rettv) != FAIL)
        win_findbuf(argvars, rettv->vval.v_list);
}

/*
 * "win_getid()" function
 */
    static void
f_win_getid(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = win_getid(argvars);
}

/*
 * "win_gotoid()" function
 */
    static void
f_win_gotoid(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = win_gotoid(argvars);
}

/*
 * "win_id2tabwin()" function
 */
    static void
f_win_id2tabwin(typval_T *argvars, typval_T *rettv)
{
    if (rettv_list_alloc(rettv) != FAIL)
        win_id2tabwin(argvars, rettv->vval.v_list);
}

/*
 * "win_id2win()" function
 */
    static void
f_win_id2win(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = win_id2win(argvars);
}

/*
 * "win_screenpos()" function
 */
    static void
f_win_screenpos(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp;

    if (rettv_list_alloc(rettv) == FAIL)
        return;

    wp = find_win_by_nr(&argvars[0], NULL);
    list_append_number(rettv->vval.v_list, wp == NULL ? 0 : wp->w_winrow + 1);
    list_append_number(rettv->vval.v_list, wp == NULL ? 0 : wp->w_wincol + 1);
}

/*
 * "getwinpos({timeout})" function
 */
    static void
f_getwinpos(typval_T *argvars UNUSED, typval_T *rettv)
{
    int x = -1;
    int y = -1;

    if (rettv_list_alloc(rettv) == FAIL)
        return;
#ifdef FEAT_GUI
    if (gui.in_use)
        (void)gui_mch_get_winpos(&x, &y);
# if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
    else
# endif
#endif
#if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
    {
        varnumber_T timeout = 100;

        if (argvars[0].v_type != VAR_UNKNOWN)
            timeout = get_tv_number(&argvars[0]);
        term_get_winpos(&x, &y, timeout);
    }
#endif
    list_append_number(rettv->vval.v_list, (varnumber_T)x);
    list_append_number(rettv->vval.v_list, (varnumber_T)y);
}


/*
 * "getwinposx()" function
 */
    static void
f_getwinposx(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = -1;
#ifdef FEAT_GUI
    if (gui.in_use)
    {
        int         x, y;

        if (gui_mch_get_winpos(&x, &y) == OK)
            rettv->vval.v_number = x;
        return;
    }
#endif
#if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
    {
        int         x, y;

        if (term_get_winpos(&x, &y, (varnumber_T)100) == OK)
            rettv->vval.v_number = x;
    }
#endif
}

/*
 * "getwinposy()" function
 */
    static void
f_getwinposy(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = -1;
#ifdef FEAT_GUI
    if (gui.in_use)
    {
        int         x, y;

        if (gui_mch_get_winpos(&x, &y) == OK)
            rettv->vval.v_number = y;
        return;
    }
#endif
#if defined(HAVE_TGETENT) && defined(FEAT_TERMRESPONSE)
    {
        int         x, y;

        if (term_get_winpos(&x, &y, (varnumber_T)100) == OK)
            rettv->vval.v_number = y;
    }
#endif
}

/*
 * "getwinvar()" function
 */
    static void
f_getwinvar(typval_T *argvars, typval_T *rettv)
{
    getwinvar(argvars, rettv, 0);
}

/*
 * "glob()" function
 */
    static void
f_glob(typval_T *argvars, typval_T *rettv)
{
    int         options = WILD_SILENT|WILD_USE_NL;
    expand_T    xpc;
    int         error = FALSE;

    /* When the optional second argument is non-zero, don't remove matches
     * for 'wildignore' and don't put matches for 'suffixes' at the end. */
    rettv->v_type = VAR_STRING;
    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        if (get_tv_number_chk(&argvars[1], &error))
            options |= WILD_KEEP_ALL;
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            if (get_tv_number_chk(&argvars[2], &error))
            {
                rettv_list_set(rettv, NULL);
            }
            if (argvars[3].v_type != VAR_UNKNOWN
                                    && get_tv_number_chk(&argvars[3], &error))
                options |= WILD_ALLLINKS;
        }
    }
    if (!error)
    {
        ExpandInit(&xpc);
        xpc.xp_context = EXPAND_FILES;
        if (p_wic)
            options += WILD_ICASE;
        if (rettv->v_type == VAR_STRING)
            rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
                                                     NULL, options, WILD_ALL);
        else if (rettv_list_alloc(rettv) != FAIL)
        {
          int i;

          ExpandOne(&xpc, get_tv_string(&argvars[0]),
                                                NULL, options, WILD_ALL_KEEP);
          for (i = 0; i < xpc.xp_numfiles; i++)
              list_append_string(rettv->vval.v_list, xpc.xp_files[i], -1);

          ExpandCleanup(&xpc);
        }
    }
    else
        rettv->vval.v_string = NULL;
}

/*
 * "globpath()" function
 */
    static void
f_globpath(typval_T *argvars, typval_T *rettv)
{
    int         flags = 0;
    char_u      buf1[NUMBUFLEN];
    char_u      *file = get_tv_string_buf_chk(&argvars[1], buf1);
    int         error = FALSE;
    garray_T    ga;
    int         i;

    /* When the optional second argument is non-zero, don't remove matches
    * for 'wildignore' and don't put matches for 'suffixes' at the end. */
    rettv->v_type = VAR_STRING;
    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        if (get_tv_number_chk(&argvars[2], &error))
            flags |= WILD_KEEP_ALL;
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            if (get_tv_number_chk(&argvars[3], &error))
            {
                rettv_list_set(rettv, NULL);
            }
            if (argvars[4].v_type != VAR_UNKNOWN
                                    && get_tv_number_chk(&argvars[4], &error))
                flags |= WILD_ALLLINKS;
        }
    }
    if (file != NULL && !error)
    {
        ga_init2(&ga, (int)sizeof(char_u *), 10);
        globpath(get_tv_string(&argvars[0]), file, &ga, flags);
        if (rettv->v_type == VAR_STRING)
            rettv->vval.v_string = ga_concat_strings(&ga, "\n");
        else if (rettv_list_alloc(rettv) != FAIL)
            for (i = 0; i < ga.ga_len; ++i)
                list_append_string(rettv->vval.v_list,
                                            ((char_u **)(ga.ga_data))[i], -1);
        ga_clear_strings(&ga);
    }
    else
        rettv->vval.v_string = NULL;
}

/*
 * "glob2regpat()" function
 */
    static void
f_glob2regpat(typval_T *argvars, typval_T *rettv)
{
    char_u      *pat = get_tv_string_chk(&argvars[0]);

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = (pat == NULL)
                         ? NULL : file_pat_to_reg_pat(pat, NULL, NULL, FALSE);
}

/* for VIM_VERSION_ defines */
#include "version.h"

/*
 * "has()" function
 */
    static void
f_has(typval_T *argvars, typval_T *rettv)
{
    int         i;
    char_u      *name;
    int         n = FALSE;
    static char *(has_list[]) =
    {
#ifdef AMIGA
        "amiga",
# ifdef FEAT_ARP
        "arp",
# endif
#endif
#ifdef __BEOS__
        "beos",
#endif
#ifdef MACOS_X
        "mac",          /* Mac OS X (and, once, Mac OS Classic) */
        "osx",          /* Mac OS X */
# ifdef MACOS_X_DARWIN
        "macunix",      /* Mac OS X, with the darwin feature */
        "osxdarwin",    /* synonym for macunix */
# endif
#endif
#ifdef __QNX__
        "qnx",
#endif
#ifdef UNIX
        "unix",
#endif
#ifdef VMS
        "vms",
#endif
#ifdef WIN32
        "win32",
#endif
#if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
        "win32unix",
#endif
#if defined(WIN64) || defined(_WIN64)
        "win64",
#endif
#ifdef EBCDIC
        "ebcdic",
#endif
#ifndef CASE_INSENSITIVE_FILENAME
        "fname_case",
#endif
#ifdef HAVE_ACL
        "acl",
#endif
#ifdef FEAT_ARABIC
        "arabic",
#endif
        "autocmd",
#ifdef FEAT_AUTOSERVERNAME
        "autoservername",
#endif
#ifdef FEAT_BEVAL_GUI
        "balloon_eval",
# ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
        "balloon_multiline",
# endif
#endif
#ifdef FEAT_BEVAL_TERM
        "balloon_eval_term",
#endif
#if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
        "builtin_terms",
# ifdef ALL_BUILTIN_TCAPS
        "all_builtin_terms",
# endif
#endif
#if defined(FEAT_BROWSE) && (defined(USE_FILE_CHOOSER) \
        || defined(FEAT_GUI_W32) \
        || defined(FEAT_GUI_MOTIF))
        "browsefilter",
#endif
#ifdef FEAT_BYTEOFF
        "byte_offset",
#endif
#ifdef FEAT_JOB_CHANNEL
        "channel",
#endif
#ifdef FEAT_CINDENT
        "cindent",
#endif
#ifdef FEAT_CLIENTSERVER
        "clientserver",
#endif
#ifdef FEAT_CLIPBOARD
        "clipboard",
#endif
#ifdef FEAT_CMDL_COMPL
        "cmdline_compl",
#endif
#ifdef FEAT_CMDHIST
        "cmdline_hist",
#endif
#ifdef FEAT_COMMENTS
        "comments",
#endif
#ifdef FEAT_CONCEAL
        "conceal",
#endif
#ifdef FEAT_CRYPT
        "cryptv",
        "crypt-blowfish",
        "crypt-blowfish2",
#endif
#ifdef FEAT_CSCOPE
        "cscope",
#endif
        "cursorbind",
#ifdef CURSOR_SHAPE
        "cursorshape",
#endif
#ifdef DEBUG
        "debug",
#endif
#ifdef FEAT_CON_DIALOG
        "dialog_con",
#endif
#ifdef FEAT_GUI_DIALOG
        "dialog_gui",
#endif
#ifdef FEAT_DIFF
        "diff",
#endif
#ifdef FEAT_DIGRAPHS
        "digraphs",
#endif
#ifdef FEAT_DIRECTX
        "directx",
#endif
#ifdef FEAT_DND
        "dnd",
#endif
#ifdef FEAT_EMACS_TAGS
        "emacs_tags",
#endif
        "eval",     /* always present, of course! */
        "ex_extra", /* graduated feature */
#ifdef FEAT_SEARCH_EXTRA
        "extra_search",
#endif
#ifdef FEAT_FKMAP
        "farsi",
#endif
#ifdef FEAT_SEARCHPATH
        "file_in_path",
#endif
#ifdef FEAT_FILTERPIPE
        "filterpipe",
#endif
#ifdef FEAT_FIND_ID
        "find_in_path",
#endif
#ifdef FEAT_FLOAT
        "float",
#endif
#ifdef FEAT_FOLDING
        "folding",
#endif
#ifdef FEAT_FOOTER
        "footer",
#endif
#if !defined(USE_SYSTEM) && defined(UNIX)
        "fork",
#endif
#ifdef FEAT_GETTEXT
        "gettext",
#endif
#ifdef FEAT_GUI
        "gui",
#endif
#ifdef FEAT_GUI_ATHENA
# ifdef FEAT_GUI_NEXTAW
        "gui_neXtaw",
# else
        "gui_athena",
# endif
#endif
#ifdef FEAT_GUI_GTK
        "gui_gtk",
# ifdef USE_GTK3
        "gui_gtk3",
# else
        "gui_gtk2",
# endif
#endif
#ifdef FEAT_GUI_GNOME
        "gui_gnome",
#endif
#ifdef FEAT_GUI_MAC
        "gui_mac",
#endif
#ifdef FEAT_GUI_MOTIF
        "gui_motif",
#endif
#ifdef FEAT_GUI_PHOTON
        "gui_photon",
#endif
#ifdef FEAT_GUI_W32
        "gui_win32",
#endif
#ifdef FEAT_HANGULIN
        "hangul_input",
#endif
#if defined(HAVE_ICONV_H) && defined(USE_ICONV)
        "iconv",
#endif
#ifdef FEAT_INS_EXPAND
        "insert_expand",
#endif
#ifdef FEAT_JOB_CHANNEL
        "job",
#endif
#ifdef FEAT_JUMPLIST
        "jumplist",
#endif
#ifdef FEAT_KEYMAP
        "keymap",
#endif
        "lambda", /* always with FEAT_EVAL, since 7.4.2120 with closure */
#ifdef FEAT_LANGMAP
        "langmap",
#endif
#ifdef FEAT_LIBCALL
        "libcall",
#endif
#ifdef FEAT_LINEBREAK
        "linebreak",
#endif
#ifdef FEAT_LISP
        "lispindent",
#endif
        "listcmds",
#ifdef FEAT_LOCALMAP
        "localmap",
#endif
#ifdef FEAT_LUA
# ifndef DYNAMIC_LUA
        "lua",
# endif
#endif
#ifdef FEAT_MENU
        "menu",
#endif
#ifdef FEAT_SESSION
        "mksession",
#endif
#ifdef FEAT_MODIFY_FNAME
        "modify_fname",
#endif
#ifdef FEAT_MOUSE
        "mouse",
#endif
#ifdef FEAT_MOUSESHAPE
        "mouseshape",
#endif
#if defined(UNIX) || defined(VMS)
# ifdef FEAT_MOUSE_DEC
        "mouse_dec",
# endif
# ifdef FEAT_MOUSE_GPM
        "mouse_gpm",
# endif
# ifdef FEAT_MOUSE_JSB
        "mouse_jsbterm",
# endif
# ifdef FEAT_MOUSE_NET
        "mouse_netterm",
# endif
# ifdef FEAT_MOUSE_PTERM
        "mouse_pterm",
# endif
# ifdef FEAT_MOUSE_SGR
        "mouse_sgr",
# endif
# ifdef FEAT_SYSMOUSE
        "mouse_sysmouse",
# endif
# ifdef FEAT_MOUSE_URXVT
        "mouse_urxvt",
# endif
# ifdef FEAT_MOUSE_XTERM
        "mouse_xterm",
# endif
#endif
#ifdef FEAT_MBYTE
        "multi_byte",
#endif
#ifdef FEAT_MBYTE_IME
        "multi_byte_ime",
#endif
#ifdef FEAT_MULTI_LANG
        "multi_lang",
#endif
#ifdef FEAT_MZSCHEME
#ifndef DYNAMIC_MZSCHEME
        "mzscheme",
#endif
#endif
#ifdef FEAT_NUM64
        "num64",
#endif
#ifdef FEAT_OLE
        "ole",
#endif
        "packages",
#ifdef FEAT_PATH_EXTRA
        "path_extra",
#endif
#ifdef FEAT_PERL
#ifndef DYNAMIC_PERL
        "perl",
#endif
#endif
#ifdef FEAT_PERSISTENT_UNDO
        "persistent_undo",
#endif
#if defined(FEAT_PYTHON)
        "python_compiled",
# if defined(DYNAMIC_PYTHON)
        "python_dynamic",
# else
        "python",
        "pythonx",
# endif
#endif
#if defined(FEAT_PYTHON3)
        "python3_compiled",
# if defined(DYNAMIC_PYTHON3)
        "python3_dynamic",
# else
        "python3",
        "pythonx",
# endif
#endif
#ifdef FEAT_POSTSCRIPT
        "postscript",
#endif
#ifdef FEAT_PRINTER
        "printer",
#endif
#ifdef FEAT_PROFILE
        "profile",
#endif
#ifdef FEAT_RELTIME
        "reltime",
#endif
#ifdef FEAT_QUICKFIX
        "quickfix",
#endif
#ifdef FEAT_RIGHTLEFT
        "rightleft",
#endif
#if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
        "ruby",
#endif
        "scrollbind",
#ifdef FEAT_CMDL_INFO
        "showcmd",
        "cmdline_info",
#endif
#ifdef FEAT_SIGNS
        "signs",
#endif
#ifdef FEAT_SMARTINDENT
        "smartindent",
#endif
#ifdef STARTUPTIME
        "startuptime",
#endif
#ifdef FEAT_STL_OPT
        "statusline",
#endif
#ifdef FEAT_SUN_WORKSHOP
        "sun_workshop",
#endif
#ifdef FEAT_NETBEANS_INTG
        "netbeans_intg",
#endif
#ifdef FEAT_SPELL
        "spell",
#endif
#ifdef FEAT_SYN_HL
        "syntax",
#endif
#if defined(USE_SYSTEM) || !defined(UNIX)
        "system",
#endif
#ifdef FEAT_TAG_BINS
        "tag_binary",
#endif
#ifdef FEAT_TAG_OLDSTATIC
        "tag_old_static",
#endif
#ifdef FEAT_TAG_ANYWHITE
        "tag_any_white",
#endif
#ifdef FEAT_TCL
# ifndef DYNAMIC_TCL
        "tcl",
# endif
#endif
#ifdef FEAT_TERMGUICOLORS
        "termguicolors",
#endif
#if defined(FEAT_TERMINAL) && !defined(WIN3264)
        "terminal",
#endif
#ifdef TERMINFO
        "terminfo",
#endif
#ifdef FEAT_TERMRESPONSE
        "termresponse",
#endif
#ifdef FEAT_TEXTOBJ
        "textobjects",
#endif
#ifdef HAVE_TGETENT
        "tgetent",
#endif
#ifdef FEAT_TIMERS
        "timers",
#endif
#ifdef FEAT_TITLE
        "title",
#endif
#ifdef FEAT_TOOLBAR
        "toolbar",
#endif
#if defined(FEAT_CLIPBOARD) && defined(FEAT_X11)
        "unnamedplus",
#endif
#ifdef FEAT_USR_CMDS
        "user-commands",    /* was accidentally included in 5.4 */
        "user_commands",
#endif
#ifdef FEAT_VIMINFO
        "viminfo",
#endif
        "vertsplit",
#ifdef FEAT_VIRTUALEDIT
        "virtualedit",
#endif
        "visual",
#ifdef FEAT_VISUALEXTRA
        "visualextra",
#endif
#ifdef FEAT_VREPLACE
        "vreplace",
#endif
#ifdef FEAT_VTP
        "vtp",
#endif
#ifdef FEAT_WILDIGN
        "wildignore",
#endif
#ifdef FEAT_WILDMENU
        "wildmenu",
#endif
        "windows",
#ifdef FEAT_WAK
        "winaltkeys",
#endif
#ifdef FEAT_WRITEBACKUP
        "writebackup",
#endif
#ifdef FEAT_XIM
        "xim",
#endif
#ifdef FEAT_XFONTSET
        "xfontset",
#endif
#ifdef FEAT_XPM_W32
        "xpm",
        "xpm_w32",      /* for backward compatibility */
#else
# if defined(HAVE_XPM)
        "xpm",
# endif
#endif
#ifdef USE_XSMP
        "xsmp",
#endif
#ifdef USE_XSMP_INTERACT
        "xsmp_interact",
#endif
#ifdef FEAT_XCLIPBOARD
        "xterm_clipboard",
#endif
#ifdef FEAT_XTERM_SAVE
        "xterm_save",
#endif
#if defined(UNIX) && defined(FEAT_X11)
        "X11",
#endif
        NULL
    };

    name = get_tv_string(&argvars[0]);
    for (i = 0; has_list[i] != NULL; ++i)
        if (STRICMP(name, has_list[i]) == 0)
        {
            n = TRUE;
            break;
        }

    if (n == FALSE)
    {
        if (STRNICMP(name, "patch", 5) == 0)
        {
            if (name[5] == '-'
                    && STRLEN(name) >= 11
                    && vim_isdigit(name[6])
                    && vim_isdigit(name[8])
                    && vim_isdigit(name[10]))
            {
                int major = atoi((char *)name + 6);
                int minor = atoi((char *)name + 8);

                /* Expect "patch-9.9.01234". */
                n = (major < VIM_VERSION_MAJOR
                     || (major == VIM_VERSION_MAJOR
                         && (minor < VIM_VERSION_MINOR
                             || (minor == VIM_VERSION_MINOR
                                 && has_patch(atoi((char *)name + 10))))));
            }
            else
                n = has_patch(atoi((char *)name + 5));
        }
        else if (STRICMP(name, "vim_starting") == 0)
            n = (starting != 0);
        else if (STRICMP(name, "ttyin") == 0)
            n = mch_input_isatty();
        else if (STRICMP(name, "ttyout") == 0)
            n = stdout_isatty;
#ifdef FEAT_MBYTE
        else if (STRICMP(name, "multi_byte_encoding") == 0)
            n = has_mbyte;
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
        else if (STRICMP(name, "balloon_multiline") == 0)
            n = multiline_balloon_available();
#endif
#ifdef DYNAMIC_TCL
        else if (STRICMP(name, "tcl") == 0)
            n = tcl_enabled(FALSE);
#endif
#if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
        else if (STRICMP(name, "iconv") == 0)
            n = iconv_enabled(FALSE);
#endif
#ifdef DYNAMIC_LUA
        else if (STRICMP(name, "lua") == 0)
            n = lua_enabled(FALSE);
#endif
#ifdef DYNAMIC_MZSCHEME
        else if (STRICMP(name, "mzscheme") == 0)
            n = mzscheme_enabled(FALSE);
#endif
#ifdef DYNAMIC_RUBY
        else if (STRICMP(name, "ruby") == 0)
            n = ruby_enabled(FALSE);
#endif
#ifdef DYNAMIC_PYTHON
        else if (STRICMP(name, "python") == 0)
            n = python_enabled(FALSE);
#endif
#ifdef DYNAMIC_PYTHON3
        else if (STRICMP(name, "python3") == 0)
            n = python3_enabled(FALSE);
#endif
#if defined(DYNAMIC_PYTHON) || defined(DYNAMIC_PYTHON3)
        else if (STRICMP(name, "pythonx") == 0)
        {
# if defined(DYNAMIC_PYTHON) && defined(DYNAMIC_PYTHON3)
            if (p_pyx == 0)
                n = python3_enabled(FALSE) || python_enabled(FALSE);
            else if (p_pyx == 3)
                n = python3_enabled(FALSE);
            else if (p_pyx == 2)
                n = python_enabled(FALSE);
# elif defined(DYNAMIC_PYTHON)
            n = python_enabled(FALSE);
# elif defined(DYNAMIC_PYTHON3)
            n = python3_enabled(FALSE);
# endif
        }
#endif
#ifdef DYNAMIC_PERL
        else if (STRICMP(name, "perl") == 0)
            n = perl_enabled(FALSE);
#endif
#ifdef FEAT_GUI
        else if (STRICMP(name, "gui_running") == 0)
            n = (gui.in_use || gui.starting);
# ifdef FEAT_BROWSE
        else if (STRICMP(name, "browse") == 0)
            n = gui.in_use;     /* gui_mch_browse() works when GUI is running */
# endif
#endif
#ifdef FEAT_SYN_HL
        else if (STRICMP(name, "syntax_items") == 0)
            n = syntax_present(curwin);
#endif
#ifdef FEAT_VTP
        else if (STRICMP(name, "vcon") == 0)
            n = has_vtp_working();
#endif
#ifdef FEAT_NETBEANS_INTG
        else if (STRICMP(name, "netbeans_enabled") == 0)
            n = netbeans_active();
#endif
#if defined(FEAT_TERMINAL) && defined(WIN3264)
        else if (STRICMP(name, "terminal") == 0)
            n = terminal_enabled();
#endif
    }

    rettv->vval.v_number = n;
}

/*
 * "has_key()" function
 */
    static void
f_has_key(typval_T *argvars, typval_T *rettv)
{
    if (argvars[0].v_type != VAR_DICT)
    {
        EMSG(_(e_dictreq));
        return;
    }
    if (argvars[0].vval.v_dict == NULL)
        return;

    rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
                                      get_tv_string(&argvars[1]), -1) != NULL;
}

/*
 * "haslocaldir()" function
 */
    static void
f_haslocaldir(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp = NULL;

    wp = find_tabwin(&argvars[0], &argvars[1]);
    rettv->vval.v_number = (wp != NULL && wp->w_localdir != NULL);
}

/*
 * "hasmapto()" function
 */
    static void
f_hasmapto(typval_T *argvars, typval_T *rettv)
{
    char_u      *name;
    char_u      *mode;
    char_u      buf[NUMBUFLEN];
    int         abbr = FALSE;

    name = get_tv_string(&argvars[0]);
    if (argvars[1].v_type == VAR_UNKNOWN)
        mode = (char_u *)"nvo";
    else
    {
        mode = get_tv_string_buf(&argvars[1], buf);
        if (argvars[2].v_type != VAR_UNKNOWN)
            abbr = (int)get_tv_number(&argvars[2]);
    }

    if (map_to_exists(name, mode, abbr))
        rettv->vval.v_number = TRUE;
    else
        rettv->vval.v_number = FALSE;
}

/*
 * "histadd()" function
 */
    static void
f_histadd(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_CMDHIST
    int         histype;
    char_u      *str;
    char_u      buf[NUMBUFLEN];
#endif

    rettv->vval.v_number = FALSE;
    if (check_restricted() || check_secure())
        return;
#ifdef FEAT_CMDHIST
    str = get_tv_string_chk(&argvars[0]);       /* NULL on type error */
    histype = str != NULL ? get_histtype(str) : -1;
    if (histype >= 0)
    {
        str = get_tv_string_buf(&argvars[1], buf);
        if (*str != NUL)
        {
            init_history();
            add_to_history(histype, str, FALSE, NUL);
            rettv->vval.v_number = TRUE;
            return;
        }
    }
#endif
}

/*
 * "histdel()" function
 */
    static void
f_histdel(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_CMDHIST
    int         n;
    char_u      buf[NUMBUFLEN];
    char_u      *str;

    str = get_tv_string_chk(&argvars[0]);       /* NULL on type error */
    if (str == NULL)
        n = 0;
    else if (argvars[1].v_type == VAR_UNKNOWN)
        /* only one argument: clear entire history */
        n = clr_history(get_histtype(str));
    else if (argvars[1].v_type == VAR_NUMBER)
        /* index given: remove that entry */
        n = del_history_idx(get_histtype(str),
                                          (int)get_tv_number(&argvars[1]));
    else
        /* string given: remove all matching entries */
        n = del_history_entry(get_histtype(str),
                                      get_tv_string_buf(&argvars[1], buf));
    rettv->vval.v_number = n;
#endif
}

/*
 * "histget()" function
 */
    static void
f_histget(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_CMDHIST
    int         type;
    int         idx;
    char_u      *str;

    str = get_tv_string_chk(&argvars[0]);       /* NULL on type error */
    if (str == NULL)
        rettv->vval.v_string = NULL;
    else
    {
        type = get_histtype(str);
        if (argvars[1].v_type == VAR_UNKNOWN)
            idx = get_history_idx(type);
        else
            idx = (int)get_tv_number_chk(&argvars[1], NULL);
                                                    /* -1 on type error */
        rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
    }
#else
    rettv->vval.v_string = NULL;
#endif
    rettv->v_type = VAR_STRING;
}

/*
 * "histnr()" function
 */
    static void
f_histnr(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         i;

#ifdef FEAT_CMDHIST
    char_u      *history = get_tv_string_chk(&argvars[0]);

    i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
    if (i >= HIST_CMD && i < HIST_COUNT)
        i = get_history_idx(i);
    else
#endif
        i = -1;
    rettv->vval.v_number = i;
}

/*
 * "highlightID(name)" function
 */
    static void
f_hlID(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
}

/*
 * "highlight_exists()" function
 */
    static void
f_hlexists(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
}

/*
 * "hostname()" function
 */
    static void
f_hostname(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u hostname[256];

    mch_get_host_name(hostname, 256);
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_strsave(hostname);
}

/*
 * iconv() function
 */
    static void
f_iconv(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_MBYTE
    char_u      buf1[NUMBUFLEN];
    char_u      buf2[NUMBUFLEN];
    char_u      *from, *to, *str;
    vimconv_T   vimconv;
#endif

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

#ifdef FEAT_MBYTE
    str = get_tv_string(&argvars[0]);
    from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
    to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
    vimconv.vc_type = CONV_NONE;
    convert_setup(&vimconv, from, to);

    /* If the encodings are equal, no conversion needed. */
    if (vimconv.vc_type == CONV_NONE)
        rettv->vval.v_string = vim_strsave(str);
    else
        rettv->vval.v_string = string_convert(&vimconv, str, NULL);

    convert_setup(&vimconv, NULL, NULL);
    vim_free(from);
    vim_free(to);
#endif
}

/*
 * "indent()" function
 */
    static void
f_indent(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum;

    lnum = get_tv_lnum(argvars);
    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
        rettv->vval.v_number = get_indent_lnum(lnum);
    else
        rettv->vval.v_number = -1;
}

/*
 * "index()" function
 */
    static void
f_index(typval_T *argvars, typval_T *rettv)
{
    list_T      *l;
    listitem_T  *item;
    long        idx = 0;
    int         ic = FALSE;

    rettv->vval.v_number = -1;
    if (argvars[0].v_type != VAR_LIST)
    {
        EMSG(_(e_listreq));
        return;
    }
    l = argvars[0].vval.v_list;
    if (l != NULL)
    {
        item = l->lv_first;
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            int         error = FALSE;

            /* Start at specified item.  Use the cached index that list_find()
             * sets, so that a negative number also works. */
            item = list_find(l, (long)get_tv_number_chk(&argvars[2], &error));
            idx = l->lv_idx;
            if (argvars[3].v_type != VAR_UNKNOWN)
                ic = (int)get_tv_number_chk(&argvars[3], &error);
            if (error)
                item = NULL;
        }

        for ( ; item != NULL; item = item->li_next, ++idx)
            if (tv_equal(&item->li_tv, &argvars[1], ic, FALSE))
            {
                rettv->vval.v_number = idx;
                break;
            }
    }
}

static int inputsecret_flag = 0;

/*
 * "input()" function
 *     Also handles inputsecret() when inputsecret is set.
 */
    static void
f_input(typval_T *argvars, typval_T *rettv)
{
    get_user_input(argvars, rettv, FALSE, inputsecret_flag);
}

/*
 * "inputdialog()" function
 */
    static void
f_inputdialog(typval_T *argvars, typval_T *rettv)
{
#if defined(FEAT_GUI_TEXTDIALOG)
    /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
    if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
    {
        char_u  *message;
        char_u  buf[NUMBUFLEN];
        char_u  *defstr = (char_u *)"";

        message = get_tv_string_chk(&argvars[0]);
        if (argvars[1].v_type != VAR_UNKNOWN
                && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
            vim_strncpy(IObuff, defstr, IOSIZE - 1);
        else
            IObuff[0] = NUL;
        if (message != NULL && defstr != NULL
                && do_dialog(VIM_QUESTION, NULL, message,
                          (char_u *)_("&OK\n&Cancel"), 1, IObuff, FALSE) == 1)
            rettv->vval.v_string = vim_strsave(IObuff);
        else
        {
            if (message != NULL && defstr != NULL
                                        && argvars[1].v_type != VAR_UNKNOWN
                                        && argvars[2].v_type != VAR_UNKNOWN)
                rettv->vval.v_string = vim_strsave(
                                      get_tv_string_buf(&argvars[2], buf));
            else
                rettv->vval.v_string = NULL;
        }
        rettv->v_type = VAR_STRING;
    }
    else
#endif
        get_user_input(argvars, rettv, TRUE, inputsecret_flag);
}

/*
 * "inputlist()" function
 */
    static void
f_inputlist(typval_T *argvars, typval_T *rettv)
{
    listitem_T  *li;
    int         selected;
    int         mouse_used;

#ifdef NO_CONSOLE_INPUT
    /* While starting up, there is no place to enter text. When running tests
     * with --not-a-term we assume feedkeys() will be used. */
    if (no_console_input() && !is_not_a_term())
        return;
#endif
    if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
    {
        EMSG2(_(e_listarg), "inputlist()");
        return;
    }

    msg_start();
    msg_row = Rows - 1; /* for when 'cmdheight' > 1 */
    lines_left = Rows;  /* avoid more prompt */
    msg_scroll = TRUE;
    msg_clr_eos();

    for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
    {
        msg_puts(get_tv_string(&li->li_tv));
        msg_putchar('\n');
    }

    /* Ask for choice. */
    selected = prompt_for_number(&mouse_used);
    if (mouse_used)
        selected -= lines_left;

    rettv->vval.v_number = selected;
}


static garray_T     ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};

/*
 * "inputrestore()" function
 */
    static void
f_inputrestore(typval_T *argvars UNUSED, typval_T *rettv)
{
    if (ga_userinput.ga_len > 0)
    {
        --ga_userinput.ga_len;
        restore_typeahead((tasave_T *)(ga_userinput.ga_data)
                                                       + ga_userinput.ga_len);
        /* default return is zero == OK */
    }
    else if (p_verbose > 1)
    {
        verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
        rettv->vval.v_number = 1; /* Failed */
    }
}

/*
 * "inputsave()" function
 */
    static void
f_inputsave(typval_T *argvars UNUSED, typval_T *rettv)
{
    /* Add an entry to the stack of typeahead storage. */
    if (ga_grow(&ga_userinput, 1) == OK)
    {
        save_typeahead((tasave_T *)(ga_userinput.ga_data)
                                                       + ga_userinput.ga_len);
        ++ga_userinput.ga_len;
        /* default return is zero == OK */
    }
    else
        rettv->vval.v_number = 1; /* Failed */
}

/*
 * "inputsecret()" function
 */
    static void
f_inputsecret(typval_T *argvars, typval_T *rettv)
{
    ++cmdline_star;
    ++inputsecret_flag;
    f_input(argvars, rettv);
    --cmdline_star;
    --inputsecret_flag;
}

/*
 * "insert()" function
 */
    static void
f_insert(typval_T *argvars, typval_T *rettv)
{
    long        before = 0;
    listitem_T  *item;
    list_T      *l;
    int         error = FALSE;

    if (argvars[0].v_type != VAR_LIST)
        EMSG2(_(e_listarg), "insert()");
    else if ((l = argvars[0].vval.v_list) != NULL
            && !tv_check_lock(l->lv_lock, (char_u *)N_("insert() argument"), TRUE))
    {
        if (argvars[2].v_type != VAR_UNKNOWN)
            before = (long)get_tv_number_chk(&argvars[2], &error);
        if (error)
            return;             /* type error; errmsg already given */

        if (before == l->lv_len)
            item = NULL;
        else
        {
            item = list_find(l, before);
            if (item == NULL)
            {
                EMSGN(_(e_listidx), before);
                l = NULL;
            }
        }
        if (l != NULL)
        {
            list_insert_tv(l, &argvars[1], item);
            copy_tv(&argvars[0], rettv);
        }
    }
}

/*
 * "invert(expr)" function
 */
    static void
f_invert(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = ~get_tv_number_chk(&argvars[0], NULL);
}

/*
 * "isdirectory()" function
 */
    static void
f_isdirectory(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
}

/*
 * Return TRUE if typeval "tv" is locked: Either that value is locked itself
 * or it refers to a List or Dictionary that is locked.
 */
    static int
tv_islocked(typval_T *tv)
{
    return (tv->v_lock & VAR_LOCKED)
        || (tv->v_type == VAR_LIST
                && tv->vval.v_list != NULL
                && (tv->vval.v_list->lv_lock & VAR_LOCKED))
        || (tv->v_type == VAR_DICT
                && tv->vval.v_dict != NULL
                && (tv->vval.v_dict->dv_lock & VAR_LOCKED));
}

/*
 * "islocked()" function
 */
    static void
f_islocked(typval_T *argvars, typval_T *rettv)
{
    lval_T      lv;
    char_u      *end;
    dictitem_T  *di;

    rettv->vval.v_number = -1;
    end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE,
                             GLV_NO_AUTOLOAD | GLV_READ_ONLY, FNE_CHECK_START);
    if (end != NULL && lv.ll_name != NULL)
    {
        if (*end != NUL)
            EMSG(_(e_trailing));
        else
        {
            if (lv.ll_tv == NULL)
            {
                di = find_var(lv.ll_name, NULL, TRUE);
                if (di != NULL)
                {
                    /* Consider a variable locked when:
                     * 1. the variable itself is locked
                     * 2. the value of the variable is locked.
                     * 3. the List or Dict value is locked.
                     */
                    rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
                                                   || tv_islocked(&di->di_tv));
                }
            }
            else if (lv.ll_range)
                EMSG(_("E786: Range not allowed"));
            else if (lv.ll_newkey != NULL)
                EMSG2(_(e_dictkey), lv.ll_newkey);
            else if (lv.ll_list != NULL)
                /* List item. */
                rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
            else
                /* Dictionary item. */
                rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
        }
    }

    clear_lval(&lv);
}

#if defined(FEAT_FLOAT) && defined(HAVE_MATH_H)
/*
 * "isnan()" function
 */
    static void
f_isnan(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = argvars[0].v_type == VAR_FLOAT
                                            && isnan(argvars[0].vval.v_float);
}
#endif

/*
 * "items(dict)" function
 */
    static void
f_items(typval_T *argvars, typval_T *rettv)
{
    dict_list(argvars, rettv, 2);
}

#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
/*
 * Get the job from the argument.
 * Returns NULL if the job is invalid.
 */
    static job_T *
get_job_arg(typval_T *tv)
{
    job_T *job;

    if (tv->v_type != VAR_JOB)
    {
        EMSG2(_(e_invarg2), get_tv_string(tv));
        return NULL;
    }
    job = tv->vval.v_job;

    if (job == NULL)
        EMSG(_("E916: not a valid job"));
    return job;
}

/*
 * "job_getchannel()" function
 */
    static void
f_job_getchannel(typval_T *argvars, typval_T *rettv)
{
    job_T       *job = get_job_arg(&argvars[0]);

    if (job != NULL)
    {
        rettv->v_type = VAR_CHANNEL;
        rettv->vval.v_channel = job->jv_channel;
        if (job->jv_channel != NULL)
            ++job->jv_channel->ch_refcount;
    }
}

/*
 * "job_info()" function
 */
    static void
f_job_info(typval_T *argvars, typval_T *rettv)
{
    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        job_T   *job = get_job_arg(&argvars[0]);

        if (job != NULL && rettv_dict_alloc(rettv) != FAIL)
            job_info(job, rettv->vval.v_dict);
    }
    else if (rettv_list_alloc(rettv) == OK)
        job_info_all(rettv->vval.v_list);
}

/*
 * "job_setoptions()" function
 */
    static void
f_job_setoptions(typval_T *argvars, typval_T *rettv UNUSED)
{
    job_T       *job = get_job_arg(&argvars[0]);
    jobopt_T    opt;

    if (job == NULL)
        return;
    clear_job_options(&opt);
    if (get_job_options(&argvars[1], &opt, JO_STOPONEXIT + JO_EXIT_CB, 0) == OK)
        job_set_options(job, &opt);
    free_job_options(&opt);
}

/*
 * "job_start()" function
 */
    static void
f_job_start(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_JOB;
    if (check_restricted() || check_secure())
        return;
    rettv->vval.v_job = job_start(argvars, NULL, NULL);
}

/*
 * "job_status()" function
 */
    static void
f_job_status(typval_T *argvars, typval_T *rettv)
{
    job_T       *job = get_job_arg(&argvars[0]);

    if (job != NULL)
    {
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = vim_strsave((char_u *)job_status(job));
    }
}

/*
 * "job_stop()" function
 */
    static void
f_job_stop(typval_T *argvars, typval_T *rettv)
{
    job_T       *job = get_job_arg(&argvars[0]);

    if (job != NULL)
        rettv->vval.v_number = job_stop(job, argvars, NULL);
}
#endif

/*
 * "join()" function
 */
    static void
f_join(typval_T *argvars, typval_T *rettv)
{
    garray_T    ga;
    char_u      *sep;

    if (argvars[0].v_type != VAR_LIST)
    {
        EMSG(_(e_listreq));
        return;
    }
    if (argvars[0].vval.v_list == NULL)
        return;
    if (argvars[1].v_type == VAR_UNKNOWN)
        sep = (char_u *)" ";
    else
        sep = get_tv_string_chk(&argvars[1]);

    rettv->v_type = VAR_STRING;

    if (sep != NULL)
    {
        ga_init2(&ga, (int)sizeof(char), 80);
        list_join(&ga, argvars[0].vval.v_list, sep, TRUE, FALSE, 0);
        ga_append(&ga, NUL);
        rettv->vval.v_string = (char_u *)ga.ga_data;
    }
    else
        rettv->vval.v_string = NULL;
}

/*
 * "js_decode()" function
 */
    static void
f_js_decode(typval_T *argvars, typval_T *rettv)
{
    js_read_T   reader;

    reader.js_buf = get_tv_string(&argvars[0]);
    reader.js_fill = NULL;
    reader.js_used = 0;
    if (json_decode_all(&reader, rettv, JSON_JS) != OK)
        EMSG(_(e_invarg));
}

/*
 * "js_encode()" function
 */
    static void
f_js_encode(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = json_encode(&argvars[0], JSON_JS);
}

/*
 * "json_decode()" function
 */
    static void
f_json_decode(typval_T *argvars, typval_T *rettv)
{
    js_read_T   reader;

    reader.js_buf = get_tv_string(&argvars[0]);
    reader.js_fill = NULL;
    reader.js_used = 0;
    json_decode_all(&reader, rettv, 0);
}

/*
 * "json_encode()" function
 */
    static void
f_json_encode(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = json_encode(&argvars[0], 0);
}

/*
 * "keys()" function
 */
    static void
f_keys(typval_T *argvars, typval_T *rettv)
{
    dict_list(argvars, rettv, 0);
}

/*
 * "last_buffer_nr()" function.
 */
    static void
f_last_buffer_nr(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         n = 0;
    buf_T       *buf;

    FOR_ALL_BUFFERS(buf)
        if (n < buf->b_fnum)
            n = buf->b_fnum;

    rettv->vval.v_number = n;
}

/*
 * "len()" function
 */
    static void
f_len(typval_T *argvars, typval_T *rettv)
{
    switch (argvars[0].v_type)
    {
        case VAR_STRING:
        case VAR_NUMBER:
            rettv->vval.v_number = (varnumber_T)STRLEN(
                                               get_tv_string(&argvars[0]));
            break;
        case VAR_LIST:
            rettv->vval.v_number = list_len(argvars[0].vval.v_list);
            break;
        case VAR_DICT:
            rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
            break;
        case VAR_UNKNOWN:
        case VAR_SPECIAL:
        case VAR_FLOAT:
        case VAR_FUNC:
        case VAR_PARTIAL:
        case VAR_JOB:
        case VAR_CHANNEL:
            EMSG(_("E701: Invalid type for len()"));
            break;
    }
}

    static void
libcall_common(typval_T *argvars UNUSED, typval_T *rettv, int type)
{
#ifdef FEAT_LIBCALL
    char_u              *string_in;
    char_u              **string_result;
    int                 nr_result;
#endif

    rettv->v_type = type;
    if (type != VAR_NUMBER)
        rettv->vval.v_string = NULL;

    if (check_restricted() || check_secure())
        return;

#ifdef FEAT_LIBCALL
    /* The first two args must be strings, otherwise it's meaningless */
    if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
    {
        string_in = NULL;
        if (argvars[2].v_type == VAR_STRING)
            string_in = argvars[2].vval.v_string;
        if (type == VAR_NUMBER)
            string_result = NULL;
        else
            string_result = &rettv->vval.v_string;
        if (mch_libcall(argvars[0].vval.v_string,
                             argvars[1].vval.v_string,
                             string_in,
                             argvars[2].vval.v_number,
                             string_result,
                             &nr_result) == OK
                && type == VAR_NUMBER)
            rettv->vval.v_number = nr_result;
    }
#endif
}

/*
 * "libcall()" function
 */
    static void
f_libcall(typval_T *argvars, typval_T *rettv)
{
    libcall_common(argvars, rettv, VAR_STRING);
}

/*
 * "libcallnr()" function
 */
    static void
f_libcallnr(typval_T *argvars, typval_T *rettv)
{
    libcall_common(argvars, rettv, VAR_NUMBER);
}

/*
 * "line(string)" function
 */
    static void
f_line(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum = 0;
    pos_T       *fp;
    int         fnum;

    fp = var2fpos(&argvars[0], TRUE, &fnum);
    if (fp != NULL)
        lnum = fp->lnum;
    rettv->vval.v_number = lnum;
}

/*
 * "line2byte(lnum)" function
 */
    static void
f_line2byte(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifndef FEAT_BYTEOFF
    rettv->vval.v_number = -1;
#else
    linenr_T    lnum;

    lnum = get_tv_lnum(argvars);
    if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
    if (rettv->vval.v_number >= 0)
        ++rettv->vval.v_number;
#endif
}

/*
 * "lispindent(lnum)" function
 */
    static void
f_lispindent(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_LISP
    pos_T       pos;
    linenr_T    lnum;

    pos = curwin->w_cursor;
    lnum = get_tv_lnum(argvars);
    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
    {
        curwin->w_cursor.lnum = lnum;
        rettv->vval.v_number = get_lisp_indent();
        curwin->w_cursor = pos;
    }
    else
#endif
        rettv->vval.v_number = -1;
}

/*
 * "localtime()" function
 */
    static void
f_localtime(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = (varnumber_T)time(NULL);
}

static void get_maparg(typval_T *argvars, typval_T *rettv, int exact);

    static void
get_maparg(typval_T *argvars, typval_T *rettv, int exact)
{
    char_u      *keys;
    char_u      *which;
    char_u      buf[NUMBUFLEN];
    char_u      *keys_buf = NULL;
    char_u      *rhs;
    int         mode;
    int         abbr = FALSE;
    int         get_dict = FALSE;
    mapblock_T  *mp;
    int         buffer_local;

    /* return empty string for failure */
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    keys = get_tv_string(&argvars[0]);
    if (*keys == NUL)
        return;

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        which = get_tv_string_buf_chk(&argvars[1], buf);
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            abbr = (int)get_tv_number(&argvars[2]);
            if (argvars[3].v_type != VAR_UNKNOWN)
                get_dict = (int)get_tv_number(&argvars[3]);
        }
    }
    else
        which = (char_u *)"";
    if (which == NULL)
        return;

    mode = get_map_mode(&which, 0);

    keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE, FALSE);
    rhs = check_map(keys, mode, exact, FALSE, abbr, &mp, &buffer_local);
    vim_free(keys_buf);

    if (!get_dict)
    {
        /* Return a string. */
        if (rhs != NULL)
            rettv->vval.v_string = str2special_save(rhs, FALSE);

    }
    else if (rettv_dict_alloc(rettv) != FAIL && rhs != NULL)
    {
        /* Return a dictionary. */
        char_u      *lhs = str2special_save(mp->m_keys, TRUE);
        char_u      *mapmode = map_mode_to_chars(mp->m_mode);
        dict_T      *dict = rettv->vval.v_dict;

        dict_add_nr_str(dict, "lhs",     0L, lhs);
        dict_add_nr_str(dict, "rhs",     0L, mp->m_orig_str);
        dict_add_nr_str(dict, "noremap", mp->m_noremap ? 1L : 0L , NULL);
        dict_add_nr_str(dict, "expr",    mp->m_expr    ? 1L : 0L, NULL);
        dict_add_nr_str(dict, "silent",  mp->m_silent  ? 1L : 0L, NULL);
        dict_add_nr_str(dict, "sid",     (long)mp->m_script_ID, NULL);
        dict_add_nr_str(dict, "buffer",  (long)buffer_local, NULL);
        dict_add_nr_str(dict, "nowait",  mp->m_nowait  ? 1L : 0L, NULL);
        dict_add_nr_str(dict, "mode",    0L, mapmode);

        vim_free(lhs);
        vim_free(mapmode);
    }
}

#ifdef FEAT_FLOAT
/*
 * "log()" function
 */
    static void
f_log(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = log(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "log10()" function
 */
    static void
f_log10(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = log10(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

#ifdef FEAT_LUA
/*
 * "luaeval()" function
 */
    static void
f_luaeval(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      buf[NUMBUFLEN];

    str = get_tv_string_buf(&argvars[0], buf);
    do_luaeval(str, argvars + 1, rettv);
}
#endif

/*
 * "map()" function
 */
    static void
f_map(typval_T *argvars, typval_T *rettv)
{
    filter_map(argvars, rettv, TRUE);
}

/*
 * "maparg()" function
 */
    static void
f_maparg(typval_T *argvars, typval_T *rettv)
{
    get_maparg(argvars, rettv, TRUE);
}

/*
 * "mapcheck()" function
 */
    static void
f_mapcheck(typval_T *argvars, typval_T *rettv)
{
    get_maparg(argvars, rettv, FALSE);
}

typedef enum
{
    MATCH_END,      /* matchend() */
    MATCH_MATCH,    /* match() */
    MATCH_STR,      /* matchstr() */
    MATCH_LIST,     /* matchlist() */
    MATCH_POS       /* matchstrpos() */
} matchtype_T;

    static void
find_some_match(typval_T *argvars, typval_T *rettv, matchtype_T type)
{
    char_u      *str = NULL;
    long        len = 0;
    char_u      *expr = NULL;
    char_u      *pat;
    regmatch_T  regmatch;
    char_u      patbuf[NUMBUFLEN];
    char_u      strbuf[NUMBUFLEN];
    char_u      *save_cpo;
    long        start = 0;
    long        nth = 1;
    colnr_T     startcol = 0;
    int         match = 0;
    list_T      *l = NULL;
    listitem_T  *li = NULL;
    long        idx = 0;
    char_u      *tofree = NULL;

    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
    save_cpo = p_cpo;
    p_cpo = (char_u *)"";

    rettv->vval.v_number = -1;
    if (type == MATCH_LIST || type == MATCH_POS)
    {
        /* type MATCH_LIST: return empty list when there are no matches.
         * type MATCH_POS: return ["", -1, -1, -1] */
        if (rettv_list_alloc(rettv) == FAIL)
            goto theend;
        if (type == MATCH_POS
                && (list_append_string(rettv->vval.v_list,
                                            (char_u *)"", 0) == FAIL
                    || list_append_number(rettv->vval.v_list,
                                            (varnumber_T)-1) == FAIL
                    || list_append_number(rettv->vval.v_list,
                                            (varnumber_T)-1) == FAIL
                    || list_append_number(rettv->vval.v_list,
                                            (varnumber_T)-1) == FAIL))
        {
                list_free(rettv->vval.v_list);
                rettv->vval.v_list = NULL;
                goto theend;
        }
    }
    else if (type == MATCH_STR)
    {
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = NULL;
    }

    if (argvars[0].v_type == VAR_LIST)
    {
        if ((l = argvars[0].vval.v_list) == NULL)
            goto theend;
        li = l->lv_first;
    }
    else
    {
        expr = str = get_tv_string(&argvars[0]);
        len = (long)STRLEN(str);
    }

    pat = get_tv_string_buf_chk(&argvars[1], patbuf);
    if (pat == NULL)
        goto theend;

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        int         error = FALSE;

        start = (long)get_tv_number_chk(&argvars[2], &error);
        if (error)
            goto theend;
        if (l != NULL)
        {
            li = list_find(l, start);
            if (li == NULL)
                goto theend;
            idx = l->lv_idx;    /* use the cached index */
        }
        else
        {
            if (start < 0)
                start = 0;
            if (start > len)
                goto theend;
            /* When "count" argument is there ignore matches before "start",
             * otherwise skip part of the string.  Differs when pattern is "^"
             * or "\<". */
            if (argvars[3].v_type != VAR_UNKNOWN)
                startcol = start;
            else
            {
                str += start;
                len -= start;
            }
        }

        if (argvars[3].v_type != VAR_UNKNOWN)
            nth = (long)get_tv_number_chk(&argvars[3], &error);
        if (error)
            goto theend;
    }

    regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
    if (regmatch.regprog != NULL)
    {
        regmatch.rm_ic = p_ic;

        for (;;)
        {
            if (l != NULL)
            {
                if (li == NULL)
                {
                    match = FALSE;
                    break;
                }
                vim_free(tofree);
                expr = str = echo_string(&li->li_tv, &tofree, strbuf, 0);
                if (str == NULL)
                    break;
            }

            match = vim_regexec_nl(&regmatch, str, (colnr_T)startcol);

            if (match && --nth <= 0)
                break;
            if (l == NULL && !match)
                break;

            /* Advance to just after the match. */
            if (l != NULL)
            {
                li = li->li_next;
                ++idx;
            }
            else
            {
#ifdef FEAT_MBYTE
                startcol = (colnr_T)(regmatch.startp[0]
                                    + (*mb_ptr2len)(regmatch.startp[0]) - str);
#else
                startcol = (colnr_T)(regmatch.startp[0] + 1 - str);
#endif
                if (startcol > (colnr_T)len
                                      || str + startcol <= regmatch.startp[0])
                {
                    match = FALSE;
                    break;
                }
            }
        }

        if (match)
        {
            if (type == MATCH_POS)
            {
                listitem_T *li1 = rettv->vval.v_list->lv_first;
                listitem_T *li2 = li1->li_next;
                listitem_T *li3 = li2->li_next;
                listitem_T *li4 = li3->li_next;

                vim_free(li1->li_tv.vval.v_string);
                li1->li_tv.vval.v_string = vim_strnsave(regmatch.startp[0],
                                (int)(regmatch.endp[0] - regmatch.startp[0]));
                li3->li_tv.vval.v_number =
                                      (varnumber_T)(regmatch.startp[0] - expr);
                li4->li_tv.vval.v_number =
                                        (varnumber_T)(regmatch.endp[0] - expr);
                if (l != NULL)
                    li2->li_tv.vval.v_number = (varnumber_T)idx;
            }
            else if (type == MATCH_LIST)
            {
                int i;

                /* return list with matched string and submatches */
                for (i = 0; i < NSUBEXP; ++i)
                {
                    if (regmatch.endp[i] == NULL)
                    {
                        if (list_append_string(rettv->vval.v_list,
                                                     (char_u *)"", 0) == FAIL)
                            break;
                    }
                    else if (list_append_string(rettv->vval.v_list,
                                regmatch.startp[i],
                                (int)(regmatch.endp[i] - regmatch.startp[i]))
                            == FAIL)
                        break;
                }
            }
            else if (type == MATCH_STR)
            {
                /* return matched string */
                if (l != NULL)
                    copy_tv(&li->li_tv, rettv);
                else
                    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
                                (int)(regmatch.endp[0] - regmatch.startp[0]));
            }
            else if (l != NULL)
                rettv->vval.v_number = idx;
            else
            {
                if (type != MATCH_END)
                    rettv->vval.v_number =
                                      (varnumber_T)(regmatch.startp[0] - str);
                else
                    rettv->vval.v_number =
                                        (varnumber_T)(regmatch.endp[0] - str);
                rettv->vval.v_number += (varnumber_T)(str - expr);
            }
        }
        vim_regfree(regmatch.regprog);
    }

theend:
    if (type == MATCH_POS && l == NULL && rettv->vval.v_list != NULL)
        /* matchstrpos() without a list: drop the second item. */
        listitem_remove(rettv->vval.v_list,
                                       rettv->vval.v_list->lv_first->li_next);
    vim_free(tofree);
    p_cpo = save_cpo;
}

/*
 * "match()" function
 */
    static void
f_match(typval_T *argvars, typval_T *rettv)
{
    find_some_match(argvars, rettv, MATCH_MATCH);
}

/*
 * "matchadd()" function
 */
    static void
f_matchadd(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    char_u      buf[NUMBUFLEN];
    char_u      *grp = get_tv_string_buf_chk(&argvars[0], buf); /* group */
    char_u      *pat = get_tv_string_buf_chk(&argvars[1], buf); /* pattern */
    int         prio = 10;      /* default priority */
    int         id = -1;
    int         error = FALSE;
    char_u      *conceal_char = NULL;

    rettv->vval.v_number = -1;

    if (grp == NULL || pat == NULL)
        return;
    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        prio = (int)get_tv_number_chk(&argvars[2], &error);
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
            if (argvars[4].v_type != VAR_UNKNOWN)
            {
                if (argvars[4].v_type != VAR_DICT)
                {
                    EMSG(_(e_dictreq));
                    return;
                }
                if (dict_find(argvars[4].vval.v_dict,
                                             (char_u *)"conceal", -1) != NULL)
                    conceal_char = get_dict_string(argvars[4].vval.v_dict,
                                                  (char_u *)"conceal", FALSE);
            }
        }
    }
    if (error == TRUE)
        return;
    if (id >= 1 && id <= 3)
    {
        EMSGN(_("E798: ID is reserved for \":match\": %ld"), id);
        return;
    }

    rettv->vval.v_number = match_add(curwin, grp, pat, prio, id, NULL,
                                                                conceal_char);
#endif
}

/*
 * "matchaddpos()" function
 */
    static void
f_matchaddpos(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    char_u      buf[NUMBUFLEN];
    char_u      *group;
    int         prio = 10;
    int         id = -1;
    int         error = FALSE;
    list_T      *l;
    char_u      *conceal_char = NULL;

    rettv->vval.v_number = -1;

    group = get_tv_string_buf_chk(&argvars[0], buf);
    if (group == NULL)
        return;

    if (argvars[1].v_type != VAR_LIST)
    {
        EMSG2(_(e_listarg), "matchaddpos()");
        return;
    }
    l = argvars[1].vval.v_list;
    if (l == NULL)
        return;

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        prio = (int)get_tv_number_chk(&argvars[2], &error);
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
            if (argvars[4].v_type != VAR_UNKNOWN)
            {
                if (argvars[4].v_type != VAR_DICT)
                {
                    EMSG(_(e_dictreq));
                    return;
                }
                if (dict_find(argvars[4].vval.v_dict,
                                             (char_u *)"conceal", -1) != NULL)
                    conceal_char = get_dict_string(argvars[4].vval.v_dict,
                                                  (char_u *)"conceal", FALSE);
            }
        }
    }
    if (error == TRUE)
        return;

    /* id == 3 is ok because matchaddpos() is supposed to substitute :3match */
    if (id == 1 || id == 2)
    {
        EMSGN(_("E798: ID is reserved for \":match\": %ld"), id);
        return;
    }

    rettv->vval.v_number = match_add(curwin, group, NULL, prio, id, l,
                                                                conceal_char);
#endif
}

/*
 * "matcharg()" function
 */
    static void
f_matcharg(typval_T *argvars UNUSED, typval_T *rettv)
{
    if (rettv_list_alloc(rettv) == OK)
    {
#ifdef FEAT_SEARCH_EXTRA
        int         id = (int)get_tv_number(&argvars[0]);
        matchitem_T *m;

        if (id >= 1 && id <= 3)
        {
            if ((m = (matchitem_T *)get_match(curwin, id)) != NULL)
            {
                list_append_string(rettv->vval.v_list,
                                                syn_id2name(m->hlg_id), -1);
                list_append_string(rettv->vval.v_list, m->pattern, -1);
            }
            else
            {
                list_append_string(rettv->vval.v_list, NULL, -1);
                list_append_string(rettv->vval.v_list, NULL, -1);
            }
        }
#endif
    }
}

/*
 * "matchdelete()" function
 */
    static void
f_matchdelete(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    rettv->vval.v_number = match_delete(curwin,
                                       (int)get_tv_number(&argvars[0]), TRUE);
#endif
}

/*
 * "matchend()" function
 */
    static void
f_matchend(typval_T *argvars, typval_T *rettv)
{
    find_some_match(argvars, rettv, MATCH_END);
}

/*
 * "matchlist()" function
 */
    static void
f_matchlist(typval_T *argvars, typval_T *rettv)
{
    find_some_match(argvars, rettv, MATCH_LIST);
}

/*
 * "matchstr()" function
 */
    static void
f_matchstr(typval_T *argvars, typval_T *rettv)
{
    find_some_match(argvars, rettv, MATCH_STR);
}

/*
 * "matchstrpos()" function
 */
    static void
f_matchstrpos(typval_T *argvars, typval_T *rettv)
{
    find_some_match(argvars, rettv, MATCH_POS);
}

static void max_min(typval_T *argvars, typval_T *rettv, int domax);

    static void
max_min(typval_T *argvars, typval_T *rettv, int domax)
{
    varnumber_T n = 0;
    varnumber_T i;
    int         error = FALSE;

    if (argvars[0].v_type == VAR_LIST)
    {
        list_T          *l;
        listitem_T      *li;

        l = argvars[0].vval.v_list;
        if (l != NULL)
        {
            li = l->lv_first;
            if (li != NULL)
            {
                n = get_tv_number_chk(&li->li_tv, &error);
                for (;;)
                {
                    li = li->li_next;
                    if (li == NULL)
                        break;
                    i = get_tv_number_chk(&li->li_tv, &error);
                    if (domax ? i > n : i < n)
                        n = i;
                }
            }
        }
    }
    else if (argvars[0].v_type == VAR_DICT)
    {
        dict_T          *d;
        int             first = TRUE;
        hashitem_T      *hi;
        int             todo;

        d = argvars[0].vval.v_dict;
        if (d != NULL)
        {
            todo = (int)d->dv_hashtab.ht_used;
            for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
            {
                if (!HASHITEM_EMPTY(hi))
                {
                    --todo;
                    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
                    if (first)
                    {
                        n = i;
                        first = FALSE;
                    }
                    else if (domax ? i > n : i < n)
                        n = i;
                }
            }
        }
    }
    else
        EMSG2(_(e_listdictarg), domax ? "max()" : "min()");
    rettv->vval.v_number = error ? 0 : n;
}

/*
 * "max()" function
 */
    static void
f_max(typval_T *argvars, typval_T *rettv)
{
    max_min(argvars, rettv, TRUE);
}

/*
 * "min()" function
 */
    static void
f_min(typval_T *argvars, typval_T *rettv)
{
    max_min(argvars, rettv, FALSE);
}

static int mkdir_recurse(char_u *dir, int prot);

/*
 * Create the directory in which "dir" is located, and higher levels when
 * needed.
 * Return OK or FAIL.
 */
    static int
mkdir_recurse(char_u *dir, int prot)
{
    char_u      *p;
    char_u      *updir;
    int         r = FAIL;

    /* Get end of directory name in "dir".
     * We're done when it's "/" or "c:/". */
    p = gettail_sep(dir);
    if (p <= get_past_head(dir))
        return OK;

    /* If the directory exists we're done.  Otherwise: create it.*/
    updir = vim_strnsave(dir, (int)(p - dir));
    if (updir == NULL)
        return FAIL;
    if (mch_isdir(updir))
        r = OK;
    else if (mkdir_recurse(updir, prot) == OK)
        r = vim_mkdir_emsg(updir, prot);
    vim_free(updir);
    return r;
}

#ifdef vim_mkdir
/*
 * "mkdir()" function
 */
    static void
f_mkdir(typval_T *argvars, typval_T *rettv)
{
    char_u      *dir;
    char_u      buf[NUMBUFLEN];
    int         prot = 0755;

    rettv->vval.v_number = FAIL;
    if (check_restricted() || check_secure())
        return;

    dir = get_tv_string_buf(&argvars[0], buf);
    if (*dir == NUL)
        return;

    if (*gettail(dir) == NUL)
        /* remove trailing slashes */
        *gettail_sep(dir) = NUL;

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            prot = (int)get_tv_number_chk(&argvars[2], NULL);
            if (prot == -1)
                return;
        }
        if (STRCMP(get_tv_string(&argvars[1]), "p") == 0)
        {
            if (mch_isdir(dir))
            {
                /* With the "p" flag it's OK if the dir already exists. */
                rettv->vval.v_number = OK;
                return;
            }
            mkdir_recurse(dir, prot);
        }
    }
    rettv->vval.v_number = vim_mkdir_emsg(dir, prot);
}
#endif

/*
 * "mode()" function
 */
    static void
f_mode(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[3];

    buf[1] = NUL;
    buf[2] = NUL;

    if (time_for_testing == 93784)
    {
        /* Testing the two-character code. */
        buf[0] = 'x';
        buf[1] = '!';
    }
#ifdef FEAT_TERMINAL
    else if (term_use_loop())
        buf[0] = 't';
#endif
    else if (VIsual_active)
    {
        if (VIsual_select)
            buf[0] = VIsual_mode + 's' - 'v';
        else
            buf[0] = VIsual_mode;
    }
    else if (State == HITRETURN || State == ASKMORE || State == SETWSIZE
                || State == CONFIRM)
    {
        buf[0] = 'r';
        if (State == ASKMORE)
            buf[1] = 'm';
        else if (State == CONFIRM)
            buf[1] = '?';
    }
    else if (State == EXTERNCMD)
        buf[0] = '!';
    else if (State & INSERT)
    {
#ifdef FEAT_VREPLACE
        if (State & VREPLACE_FLAG)
        {
            buf[0] = 'R';
            buf[1] = 'v';
        }
        else
#endif
        {
            if (State & REPLACE_FLAG)
                buf[0] = 'R';
            else
                buf[0] = 'i';
#ifdef FEAT_INS_EXPAND
            if (ins_compl_active())
                buf[1] = 'c';
            else if (ctrl_x_mode_not_defined_yet())
                buf[1] = 'x';
#endif
        }
    }
    else if ((State & CMDLINE) || exmode_active)
    {
        buf[0] = 'c';
        if (exmode_active == EXMODE_VIM)
            buf[1] = 'v';
        else if (exmode_active == EXMODE_NORMAL)
            buf[1] = 'e';
    }
    else
    {
        buf[0] = 'n';
        if (finish_op)
            buf[1] = 'o';
    }

    /* Clear out the minor mode when the argument is not a non-zero number or
     * non-empty string.  */
    if (!non_zero_arg(&argvars[0]))
        buf[1] = NUL;

    rettv->vval.v_string = vim_strsave(buf);
    rettv->v_type = VAR_STRING;
}

#if defined(FEAT_MZSCHEME) || defined(PROTO)
/*
 * "mzeval()" function
 */
    static void
f_mzeval(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      buf[NUMBUFLEN];

    str = get_tv_string_buf(&argvars[0], buf);
    do_mzeval(str, rettv);
}

    void
mzscheme_call_vim(char_u *name, typval_T *args, typval_T *rettv)
{
    typval_T argvars[3];

    argvars[0].v_type = VAR_STRING;
    argvars[0].vval.v_string = name;
    copy_tv(args, &argvars[1]);
    argvars[2].v_type = VAR_UNKNOWN;
    f_call(argvars, rettv);
    clear_tv(&argvars[1]);
}
#endif

/*
 * "nextnonblank()" function
 */
    static void
f_nextnonblank(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum;

    for (lnum = get_tv_lnum(argvars); ; ++lnum)
    {
        if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
        {
            lnum = 0;
            break;
        }
        if (*skipwhite(ml_get(lnum)) != NUL)
            break;
    }
    rettv->vval.v_number = lnum;
}

/*
 * "nr2char()" function
 */
    static void
f_nr2char(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];

#ifdef FEAT_MBYTE
    if (has_mbyte)
    {
        int     utf8 = 0;

        if (argvars[1].v_type != VAR_UNKNOWN)
            utf8 = (int)get_tv_number_chk(&argvars[1], NULL);
        if (utf8)
            buf[(*utf_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
        else
            buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
    }
    else
#endif
    {
        buf[0] = (char_u)get_tv_number(&argvars[0]);
        buf[1] = NUL;
    }
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_strsave(buf);
}

/*
 * "or(expr, expr)" function
 */
    static void
f_or(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
                                        | get_tv_number_chk(&argvars[1], NULL);
}

/*
 * "pathshorten()" function
 */
    static void
f_pathshorten(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;

    rettv->v_type = VAR_STRING;
    p = get_tv_string_chk(&argvars[0]);
    if (p == NULL)
        rettv->vval.v_string = NULL;
    else
    {
        p = vim_strsave(p);
        rettv->vval.v_string = p;
        if (p != NULL)
            shorten_dir(p);
    }
}

#ifdef FEAT_PERL
/*
 * "perleval()" function
 */
    static void
f_perleval(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      buf[NUMBUFLEN];

    str = get_tv_string_buf(&argvars[0], buf);
    do_perleval(str, rettv);
}
#endif

#ifdef FEAT_FLOAT
/*
 * "pow()" function
 */
    static void
f_pow(typval_T *argvars, typval_T *rettv)
{
    float_T     fx = 0.0, fy = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &fx) == OK
                                     && get_float_arg(&argvars[1], &fy) == OK)
        rettv->vval.v_float = pow(fx, fy);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "prevnonblank()" function
 */
    static void
f_prevnonblank(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum;

    lnum = get_tv_lnum(argvars);
    if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
        lnum = 0;
    else
        while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
            --lnum;
    rettv->vval.v_number = lnum;
}

/* This dummy va_list is here because:
 * - passing a NULL pointer doesn't work when va_list isn't a pointer
 * - locally in the function results in a "used before set" warning
 * - using va_start() to initialize it gives "function with fixed args" error */
static va_list  ap;

/*
 * "printf()" function
 */
    static void
f_printf(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];
    int         len;
    char_u      *s;
    int         saved_did_emsg = did_emsg;
    char        *fmt;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;

    /* Get the required length, allocate the buffer and do it for real. */
    did_emsg = FALSE;
    fmt = (char *)get_tv_string_buf(&argvars[0], buf);
    len = vim_vsnprintf_typval(NULL, 0, fmt, ap, argvars + 1);
    if (!did_emsg)
    {
        s = alloc(len + 1);
        if (s != NULL)
        {
            rettv->vval.v_string = s;
            (void)vim_vsnprintf_typval((char *)s, len + 1, fmt,
                                                              ap, argvars + 1);
        }
    }
    did_emsg |= saved_did_emsg;
}

/*
 * "pumvisible()" function
 */
    static void
f_pumvisible(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_INS_EXPAND
    if (pum_visible())
        rettv->vval.v_number = 1;
#endif
}

#ifdef FEAT_PYTHON3
/*
 * "py3eval()" function
 */
    static void
f_py3eval(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      buf[NUMBUFLEN];

    if (p_pyx == 0)
        p_pyx = 3;

    str = get_tv_string_buf(&argvars[0], buf);
    do_py3eval(str, rettv);
}
#endif

#ifdef FEAT_PYTHON
/*
 * "pyeval()" function
 */
    static void
f_pyeval(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      buf[NUMBUFLEN];

    if (p_pyx == 0)
        p_pyx = 2;

    str = get_tv_string_buf(&argvars[0], buf);
    do_pyeval(str, rettv);
}
#endif

#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3)
/*
 * "pyxeval()" function
 */
    static void
f_pyxeval(typval_T *argvars, typval_T *rettv)
{
# if defined(FEAT_PYTHON) && defined(FEAT_PYTHON3)
    init_pyxversion();
    if (p_pyx == 2)
        f_pyeval(argvars, rettv);
    else
        f_py3eval(argvars, rettv);
# elif defined(FEAT_PYTHON)
    f_pyeval(argvars, rettv);
# elif defined(FEAT_PYTHON3)
    f_py3eval(argvars, rettv);
# endif
}
#endif

/*
 * "range()" function
 */
    static void
f_range(typval_T *argvars, typval_T *rettv)
{
    varnumber_T start;
    varnumber_T end;
    varnumber_T stride = 1;
    varnumber_T i;
    int         error = FALSE;

    start = get_tv_number_chk(&argvars[0], &error);
    if (argvars[1].v_type == VAR_UNKNOWN)
    {
        end = start - 1;
        start = 0;
    }
    else
    {
        end = get_tv_number_chk(&argvars[1], &error);
        if (argvars[2].v_type != VAR_UNKNOWN)
            stride = get_tv_number_chk(&argvars[2], &error);
    }

    if (error)
        return;         /* type error; errmsg already given */
    if (stride == 0)
        EMSG(_("E726: Stride is zero"));
    else if (stride > 0 ? end + 1 < start : end - 1 > start)
        EMSG(_("E727: Start past end"));
    else
    {
        if (rettv_list_alloc(rettv) == OK)
            for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
                if (list_append_number(rettv->vval.v_list,
                                                      (varnumber_T)i) == FAIL)
                    break;
    }
}

/*
 * "readfile()" function
 */
    static void
f_readfile(typval_T *argvars, typval_T *rettv)
{
    int         binary = FALSE;
    int         failed = FALSE;
    char_u      *fname;
    FILE        *fd;
    char_u      buf[(IOSIZE/256)*256];  /* rounded to avoid odd + 1 */
    int         io_size = sizeof(buf);
    int         readlen;                /* size of last fread() */
    char_u      *prev    = NULL;        /* previously read bytes, if any */
    long        prevlen  = 0;           /* length of data in prev */
    long        prevsize = 0;           /* size of prev buffer */
    long        maxline  = MAXLNUM;
    long        cnt      = 0;
    char_u      *p;                     /* position in buf */
    char_u      *start;                 /* start of current line */

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
            binary = TRUE;
        if (argvars[2].v_type != VAR_UNKNOWN)
            maxline = (long)get_tv_number(&argvars[2]);
    }

    if (rettv_list_alloc(rettv) == FAIL)
        return;

    /* Always open the file in binary mode, library functions have a mind of
     * their own about CR-LF conversion. */
    fname = get_tv_string(&argvars[0]);
    if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
    {
        EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
        return;
    }

    while (cnt < maxline || maxline < 0)
    {
        readlen = (int)fread(buf, 1, io_size, fd);

        /* This for loop processes what was read, but is also entered at end
         * of file so that either:
         * - an incomplete line gets written
         * - a "binary" file gets an empty line at the end if it ends in a
         *   newline.  */
        for (p = buf, start = buf;
                p < buf + readlen || (readlen <= 0 && (prevlen > 0 || binary));
                ++p)
        {
            if (*p == '\n' || readlen <= 0)
            {
                listitem_T  *li;
                char_u      *s  = NULL;
                long_u      len = p - start;

                /* Finished a line.  Remove CRs before NL. */
                if (readlen > 0 && !binary)
                {
                    while (len > 0 && start[len - 1] == '\r')
                        --len;
                    /* removal may cross back to the "prev" string */
                    if (len == 0)
                        while (prevlen > 0 && prev[prevlen - 1] == '\r')
                            --prevlen;
                }
                if (prevlen == 0)
                    s = vim_strnsave(start, (int)len);
                else
                {
                    /* Change "prev" buffer to be the right size.  This way
                     * the bytes are only copied once, and very long lines are
                     * allocated only once.  */
                    if ((s = vim_realloc(prev, prevlen + len + 1)) != NULL)
                    {
                        mch_memmove(s + prevlen, start, len);
                        s[prevlen + len] = NUL;
                        prev = NULL; /* the list will own the string */
                        prevlen = prevsize = 0;
                    }
                }
                if (s == NULL)
                {
                    do_outofmem_msg((long_u) prevlen + len + 1);
                    failed = TRUE;
                    break;
                }

                if ((li = listitem_alloc()) == NULL)
                {
                    vim_free(s);
                    failed = TRUE;
                    break;
                }
                li->li_tv.v_type = VAR_STRING;
                li->li_tv.v_lock = 0;
                li->li_tv.vval.v_string = s;
                list_append(rettv->vval.v_list, li);

                start = p + 1; /* step over newline */
                if ((++cnt >= maxline && maxline >= 0) || readlen <= 0)
                    break;
            }
            else if (*p == NUL)
                *p = '\n';
#ifdef FEAT_MBYTE
            /* Check for utf8 "bom"; U+FEFF is encoded as EF BB BF.  Do this
             * when finding the BF and check the previous two bytes. */
            else if (*p == 0xbf && enc_utf8 && !binary)
            {
                /* Find the two bytes before the 0xbf.  If p is at buf, or buf
                 * + 1, these may be in the "prev" string. */
                char_u back1 = p >= buf + 1 ? p[-1]
                                     : prevlen >= 1 ? prev[prevlen - 1] : NUL;
                char_u back2 = p >= buf + 2 ? p[-2]
                          : p == buf + 1 && prevlen >= 1 ? prev[prevlen - 1]
                          : prevlen >= 2 ? prev[prevlen - 2] : NUL;

                if (back2 == 0xef && back1 == 0xbb)
                {
                    char_u *dest = p - 2;

                    /* Usually a BOM is at the beginning of a file, and so at
                     * the beginning of a line; then we can just step over it.
                     */
                    if (start == dest)
                        start = p + 1;
                    else
                    {
                        /* have to shuffle buf to close gap */
                        int adjust_prevlen = 0;

                        if (dest < buf)
                        {
                            adjust_prevlen = (int)(buf - dest); /* must be 1 or 2 */
                            dest = buf;
                        }
                        if (readlen > p - buf + 1)
                            mch_memmove(dest, p + 1, readlen - (p - buf) - 1);
                        readlen -= 3 - adjust_prevlen;
                        prevlen -= adjust_prevlen;
                        p = dest - 1;
                    }
                }
            }
#endif
        } /* for */

        if (failed || (cnt >= maxline && maxline >= 0) || readlen <= 0)
            break;
        if (start < p)
        {
            /* There's part of a line in buf, store it in "prev". */
            if (p - start + prevlen >= prevsize)
            {
                /* need bigger "prev" buffer */
                char_u *newprev;

                /* A common use case is ordinary text files and "prev" gets a
                 * fragment of a line, so the first allocation is made
                 * small, to avoid repeatedly 'allocing' large and
                 * 'reallocing' small. */
                if (prevsize == 0)
                    prevsize = (long)(p - start);
                else
                {
                    long grow50pc = (prevsize * 3) / 2;
                    long growmin  = (long)((p - start) * 2 + prevlen);
                    prevsize = grow50pc > growmin ? grow50pc : growmin;
                }
                newprev = prev == NULL ? alloc(prevsize)
                                                : vim_realloc(prev, prevsize);
                if (newprev == NULL)
                {
                    do_outofmem_msg((long_u)prevsize);
                    failed = TRUE;
                    break;
                }
                prev = newprev;
            }
            /* Add the line part to end of "prev". */
            mch_memmove(prev + prevlen, start, p - start);
            prevlen += (long)(p - start);
        }
    } /* while */

    /*
     * For a negative line count use only the lines at the end of the file,
     * free the rest.
     */
    if (!failed && maxline < 0)
        while (cnt > -maxline)
        {
            listitem_remove(rettv->vval.v_list, rettv->vval.v_list->lv_first);
            --cnt;
        }

    if (failed)
    {
        list_free(rettv->vval.v_list);
        /* readfile doc says an empty list is returned on error */
        rettv->vval.v_list = list_alloc();
    }

    vim_free(prev);
    fclose(fd);
}

#if defined(FEAT_RELTIME)
static int list2proftime(typval_T *arg, proftime_T *tm);

/*
 * Convert a List to proftime_T.
 * Return FAIL when there is something wrong.
 */
    static int
list2proftime(typval_T *arg, proftime_T *tm)
{
    long        n1, n2;
    int error = FALSE;

    if (arg->v_type != VAR_LIST || arg->vval.v_list == NULL
                                             || arg->vval.v_list->lv_len != 2)
        return FAIL;
    n1 = list_find_nr(arg->vval.v_list, 0L, &error);
    n2 = list_find_nr(arg->vval.v_list, 1L, &error);
# ifdef WIN3264
    tm->HighPart = n1;
    tm->LowPart = n2;
# else
    tm->tv_sec = n1;
    tm->tv_usec = n2;
# endif
    return error ? FAIL : OK;
}
#endif /* FEAT_RELTIME */

/*
 * "reltime()" function
 */
    static void
f_reltime(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_RELTIME
    proftime_T  res;
    proftime_T  start;

    if (argvars[0].v_type == VAR_UNKNOWN)
    {
        /* No arguments: get current time. */
        profile_start(&res);
    }
    else if (argvars[1].v_type == VAR_UNKNOWN)
    {
        if (list2proftime(&argvars[0], &res) == FAIL)
            return;
        profile_end(&res);
    }
    else
    {
        /* Two arguments: compute the difference. */
        if (list2proftime(&argvars[0], &start) == FAIL
                || list2proftime(&argvars[1], &res) == FAIL)
            return;
        profile_sub(&res, &start);
    }

    if (rettv_list_alloc(rettv) == OK)
    {
        long    n1, n2;

# ifdef WIN3264
        n1 = res.HighPart;
        n2 = res.LowPart;
# else
        n1 = res.tv_sec;
        n2 = res.tv_usec;
# endif
        list_append_number(rettv->vval.v_list, (varnumber_T)n1);
        list_append_number(rettv->vval.v_list, (varnumber_T)n2);
    }
#endif
}

#ifdef FEAT_FLOAT
/*
 * "reltimefloat()" function
 */
    static void
f_reltimefloat(typval_T *argvars UNUSED, typval_T *rettv)
{
# ifdef FEAT_RELTIME
    proftime_T  tm;
# endif

    rettv->v_type = VAR_FLOAT;
    rettv->vval.v_float = 0;
# ifdef FEAT_RELTIME
    if (list2proftime(&argvars[0], &tm) == OK)
        rettv->vval.v_float = profile_float(&tm);
# endif
}
#endif

/*
 * "reltimestr()" function
 */
    static void
f_reltimestr(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_RELTIME
    proftime_T  tm;
#endif

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_RELTIME
    if (list2proftime(&argvars[0], &tm) == OK)
        rettv->vval.v_string = vim_strsave((char_u *)profile_msg(&tm));
#endif
}

#if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
static void make_connection(void);
static int check_connection(void);

    static void
make_connection(void)
{
    if (X_DISPLAY == NULL
# ifdef FEAT_GUI
            && !gui.in_use
# endif
            )
    {
        x_force_connect = TRUE;
        setup_term_clip();
        x_force_connect = FALSE;
    }
}

    static int
check_connection(void)
{
    make_connection();
    if (X_DISPLAY == NULL)
    {
        EMSG(_("E240: No connection to the X server"));
        return FAIL;
    }
    return OK;
}
#endif

#ifdef FEAT_CLIENTSERVER
    static void
remote_common(typval_T *argvars, typval_T *rettv, int expr)
{
    char_u      *server_name;
    char_u      *keys;
    char_u      *r = NULL;
    char_u      buf[NUMBUFLEN];
    int         timeout = 0;
# ifdef WIN32
    HWND        w;
# else
    Window      w;
# endif

    if (check_restricted() || check_secure())
        return;

# ifdef FEAT_X11
    if (check_connection() == FAIL)
        return;
# endif
    if (argvars[2].v_type != VAR_UNKNOWN
            && argvars[3].v_type != VAR_UNKNOWN)
        timeout = get_tv_number(&argvars[3]);

    server_name = get_tv_string_chk(&argvars[0]);
    if (server_name == NULL)
        return;         /* type error; errmsg already given */
    keys = get_tv_string_buf(&argvars[1], buf);
# ifdef WIN32
    if (serverSendToVim(server_name, keys, &r, &w, expr, timeout, TRUE) < 0)
# else
    if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, timeout,
                                                                  0, TRUE) < 0)
# endif
    {
        if (r != NULL)
        {
            EMSG(r);            /* sending worked but evaluation failed */
            vim_free(r);
        }
        else
            EMSG2(_("E241: Unable to send to %s"), server_name);
        return;
    }

    rettv->vval.v_string = r;

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        dictitem_T      v;
        char_u          str[30];
        char_u          *idvar;

        idvar = get_tv_string_chk(&argvars[2]);
        if (idvar != NULL && *idvar != NUL)
        {
            sprintf((char *)str, PRINTF_HEX_LONG_U, (long_u)w);
            v.di_tv.v_type = VAR_STRING;
            v.di_tv.vval.v_string = vim_strsave(str);
            set_var(idvar, &v.di_tv, FALSE);
            vim_free(v.di_tv.vval.v_string);
        }
    }
}
#endif

/*
 * "remote_expr()" function
 */
    static void
f_remote_expr(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_CLIENTSERVER
    remote_common(argvars, rettv, TRUE);
#endif
}

/*
 * "remote_foreground()" function
 */
    static void
f_remote_foreground(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_CLIENTSERVER
# ifdef WIN32
    /* On Win32 it's done in this application. */
    {
        char_u  *server_name = get_tv_string_chk(&argvars[0]);

        if (server_name != NULL)
            serverForeground(server_name);
    }
# else
    /* Send a foreground() expression to the server. */
    argvars[1].v_type = VAR_STRING;
    argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
    argvars[2].v_type = VAR_UNKNOWN;
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
    remote_common(argvars, rettv, TRUE);
    vim_free(argvars[1].vval.v_string);
# endif
#endif
}

    static void
f_remote_peek(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_CLIENTSERVER
    dictitem_T  v;
    char_u      *s = NULL;
# ifdef WIN32
    long_u      n = 0;
# endif
    char_u      *serverid;

    if (check_restricted() || check_secure())
    {
        rettv->vval.v_number = -1;
        return;
    }
    serverid = get_tv_string_chk(&argvars[0]);
    if (serverid == NULL)
    {
        rettv->vval.v_number = -1;
        return;         /* type error; errmsg already given */
    }
# ifdef WIN32
    sscanf((const char *)serverid, SCANF_HEX_LONG_U, &n);
    if (n == 0)
        rettv->vval.v_number = -1;
    else
    {
        s = serverGetReply((HWND)n, FALSE, FALSE, FALSE, 0);
        rettv->vval.v_number = (s != NULL);
    }
# else
    if (check_connection() == FAIL)
        return;

    rettv->vval.v_number = serverPeekReply(X_DISPLAY,
                                                serverStrToWin(serverid), &s);
# endif

    if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
    {
        char_u          *retvar;

        v.di_tv.v_type = VAR_STRING;
        v.di_tv.vval.v_string = vim_strsave(s);
        retvar = get_tv_string_chk(&argvars[1]);
        if (retvar != NULL)
            set_var(retvar, &v.di_tv, FALSE);
        vim_free(v.di_tv.vval.v_string);
    }
#else
    rettv->vval.v_number = -1;
#endif
}

    static void
f_remote_read(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u      *r = NULL;

#ifdef FEAT_CLIENTSERVER
    char_u      *serverid = get_tv_string_chk(&argvars[0]);

    if (serverid != NULL && !check_restricted() && !check_secure())
    {
        int timeout = 0;
# ifdef WIN32
        /* The server's HWND is encoded in the 'id' parameter */
        long_u          n = 0;
# endif

        if (argvars[1].v_type != VAR_UNKNOWN)
            timeout = get_tv_number(&argvars[1]);

# ifdef WIN32
        sscanf((char *)serverid, SCANF_HEX_LONG_U, &n);
        if (n != 0)
            r = serverGetReply((HWND)n, FALSE, TRUE, TRUE, timeout);
        if (r == NULL)
# else
        if (check_connection() == FAIL
                || serverReadReply(X_DISPLAY, serverStrToWin(serverid),
                                                       &r, FALSE, timeout) < 0)
# endif
            EMSG(_("E277: Unable to read a server reply"));
    }
#endif
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = r;
}

/*
 * "remote_send()" function
 */
    static void
f_remote_send(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
#ifdef FEAT_CLIENTSERVER
    remote_common(argvars, rettv, FALSE);
#endif
}

/*
 * "remote_startserver()" function
 */
    static void
f_remote_startserver(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_CLIENTSERVER
    char_u      *server = get_tv_string_chk(&argvars[0]);

    if (server == NULL)
        return;         /* type error; errmsg already given */
    if (serverName != NULL)
        EMSG(_("E941: already started a server"));
    else
    {
# ifdef FEAT_X11
        if (check_connection() == OK)
            serverRegisterName(X_DISPLAY, server);
# else
        serverSetName(server);
# endif
    }
#else
    EMSG(_("E942: +clientserver feature not available"));
#endif
}

/*
 * "remove()" function
 */
    static void
f_remove(typval_T *argvars, typval_T *rettv)
{
    list_T      *l;
    listitem_T  *item, *item2;
    listitem_T  *li;
    long        idx;
    long        end;
    char_u      *key;
    dict_T      *d;
    dictitem_T  *di;
    char_u      *arg_errmsg = (char_u *)N_("remove() argument");

    if (argvars[0].v_type == VAR_DICT)
    {
        if (argvars[2].v_type != VAR_UNKNOWN)
            EMSG2(_(e_toomanyarg), "remove()");
        else if ((d = argvars[0].vval.v_dict) != NULL
                && !tv_check_lock(d->dv_lock, arg_errmsg, TRUE))
        {
            key = get_tv_string_chk(&argvars[1]);
            if (key != NULL)
            {
                di = dict_find(d, key, -1);
                if (di == NULL)
                    EMSG2(_(e_dictkey), key);
                else if (!var_check_fixed(di->di_flags, arg_errmsg, TRUE)
                            && !var_check_ro(di->di_flags, arg_errmsg, TRUE))
                {
                    *rettv = di->di_tv;
                    init_tv(&di->di_tv);
                    dictitem_remove(d, di);
                }
            }
        }
    }
    else if (argvars[0].v_type != VAR_LIST)
        EMSG2(_(e_listdictarg), "remove()");
    else if ((l = argvars[0].vval.v_list) != NULL
            && !tv_check_lock(l->lv_lock, arg_errmsg, TRUE))
    {
        int         error = FALSE;

        idx = (long)get_tv_number_chk(&argvars[1], &error);
        if (error)
            ;           /* type error: do nothing, errmsg already given */
        else if ((item = list_find(l, idx)) == NULL)
            EMSGN(_(e_listidx), idx);
        else
        {
            if (argvars[2].v_type == VAR_UNKNOWN)
            {
                /* Remove one item, return its value. */
                vimlist_remove(l, item, item);
                *rettv = item->li_tv;
                vim_free(item);
            }
            else
            {
                /* Remove range of items, return list with values. */
                end = (long)get_tv_number_chk(&argvars[2], &error);
                if (error)
                    ;           /* type error: do nothing */
                else if ((item2 = list_find(l, end)) == NULL)
                    EMSGN(_(e_listidx), end);
                else
                {
                    int     cnt = 0;

                    for (li = item; li != NULL; li = li->li_next)
                    {
                        ++cnt;
                        if (li == item2)
                            break;
                    }
                    if (li == NULL)  /* didn't find "item2" after "item" */
                        EMSG(_(e_invrange));
                    else
                    {
                        vimlist_remove(l, item, item2);
                        if (rettv_list_alloc(rettv) == OK)
                        {
                            l = rettv->vval.v_list;
                            l->lv_first = item;
                            l->lv_last = item2;
                            item->li_prev = NULL;
                            item2->li_next = NULL;
                            l->lv_len = cnt;
                        }
                    }
                }
            }
        }
    }
}

/*
 * "rename({from}, {to})" function
 */
    static void
f_rename(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];

    if (check_restricted() || check_secure())
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
                                      get_tv_string_buf(&argvars[1], buf));
}

/*
 * "repeat()" function
 */
    static void
f_repeat(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;
    int         n;
    int         slen;
    int         len;
    char_u      *r;
    int         i;

    n = (int)get_tv_number(&argvars[1]);
    if (argvars[0].v_type == VAR_LIST)
    {
        if (rettv_list_alloc(rettv) == OK && argvars[0].vval.v_list != NULL)
            while (n-- > 0)
                if (list_extend(rettv->vval.v_list,
                                        argvars[0].vval.v_list, NULL) == FAIL)
                    break;
    }
    else
    {
        p = get_tv_string(&argvars[0]);
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = NULL;

        slen = (int)STRLEN(p);
        len = slen * n;
        if (len <= 0)
            return;

        r = alloc(len + 1);
        if (r != NULL)
        {
            for (i = 0; i < n; i++)
                mch_memmove(r + i * slen, p, (size_t)slen);
            r[len] = NUL;
        }

        rettv->vval.v_string = r;
    }
}

/*
 * "resolve()" function
 */
    static void
f_resolve(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;
#ifdef HAVE_READLINK
    char_u      *buf = NULL;
#endif

    p = get_tv_string(&argvars[0]);
#ifdef FEAT_SHORTCUT
    {
        char_u  *v = NULL;

        v = mch_resolve_shortcut(p);
        if (v != NULL)
            rettv->vval.v_string = v;
        else
            rettv->vval.v_string = vim_strsave(p);
    }
#else
# ifdef HAVE_READLINK
    {
        char_u  *cpy;
        int     len;
        char_u  *remain = NULL;
        char_u  *q;
        int     is_relative_to_current = FALSE;
        int     has_trailing_pathsep = FALSE;
        int     limit = 100;

        p = vim_strsave(p);

        if (p[0] == '.' && (vim_ispathsep(p[1])
                                   || (p[1] == '.' && (vim_ispathsep(p[2])))))
            is_relative_to_current = TRUE;

        len = STRLEN(p);
        if (len > 0 && after_pathsep(p, p + len))
        {
            has_trailing_pathsep = TRUE;
            p[len - 1] = NUL; /* the trailing slash breaks readlink() */
        }

        q = getnextcomp(p);
        if (*q != NUL)
        {
            /* Separate the first path component in "p", and keep the
             * remainder (beginning with the path separator). */
            remain = vim_strsave(q - 1);
            q[-1] = NUL;
        }

        buf = alloc(MAXPATHL + 1);
        if (buf == NULL)
            goto fail;

        for (;;)
        {
            for (;;)
            {
                len = readlink((char *)p, (char *)buf, MAXPATHL);
                if (len <= 0)
                    break;
                buf[len] = NUL;

                if (limit-- == 0)
                {
                    vim_free(p);
                    vim_free(remain);
                    EMSG(_("E655: Too many symbolic links (cycle?)"));
                    rettv->vval.v_string = NULL;
                    goto fail;
                }

                /* Ensure that the result will have a trailing path separator
                 * if the argument has one. */
                if (remain == NULL && has_trailing_pathsep)
                    add_pathsep(buf);

                /* Separate the first path component in the link value and
                 * concatenate the remainders. */
                q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
                if (*q != NUL)
                {
                    if (remain == NULL)
                        remain = vim_strsave(q - 1);
                    else
                    {
                        cpy = concat_str(q - 1, remain);
                        if (cpy != NULL)
                        {
                            vim_free(remain);
                            remain = cpy;
                        }
                    }
                    q[-1] = NUL;
                }

                q = gettail(p);
                if (q > p && *q == NUL)
                {
                    /* Ignore trailing path separator. */
                    q[-1] = NUL;
                    q = gettail(p);
                }
                if (q > p && !mch_isFullName(buf))
                {
                    /* symlink is relative to directory of argument */
                    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
                    if (cpy != NULL)
                    {
                        STRCPY(cpy, p);
                        STRCPY(gettail(cpy), buf);
                        vim_free(p);
                        p = cpy;
                    }
                }
                else
                {
                    vim_free(p);
                    p = vim_strsave(buf);
                }
            }

            if (remain == NULL)
                break;

            /* Append the first path component of "remain" to "p". */
            q = getnextcomp(remain + 1);
            len = q - remain - (*q != NUL);
            cpy = vim_strnsave(p, STRLEN(p) + len);
            if (cpy != NULL)
            {
                STRNCAT(cpy, remain, len);
                vim_free(p);
                p = cpy;
            }
            /* Shorten "remain". */
            if (*q != NUL)
                STRMOVE(remain, q - 1);
            else
                VIM_CLEAR(remain);
        }

        /* If the result is a relative path name, make it explicitly relative to
         * the current directory if and only if the argument had this form. */
        if (!vim_ispathsep(*p))
        {
            if (is_relative_to_current
                    && *p != NUL
                    && !(p[0] == '.'
                        && (p[1] == NUL
                            || vim_ispathsep(p[1])
                            || (p[1] == '.'
                                && (p[2] == NUL
                                    || vim_ispathsep(p[2]))))))
            {
                /* Prepend "./". */
                cpy = concat_str((char_u *)"./", p);
                if (cpy != NULL)
                {
                    vim_free(p);
                    p = cpy;
                }
            }
            else if (!is_relative_to_current)
            {
                /* Strip leading "./". */
                q = p;
                while (q[0] == '.' && vim_ispathsep(q[1]))
                    q += 2;
                if (q > p)
                    STRMOVE(p, p + 2);
            }
        }

        /* Ensure that the result will have no trailing path separator
         * if the argument had none.  But keep "/" or "//". */
        if (!has_trailing_pathsep)
        {
            q = p + STRLEN(p);
            if (after_pathsep(p, q))
                *gettail_sep(p) = NUL;
        }

        rettv->vval.v_string = p;
    }
# else
    rettv->vval.v_string = vim_strsave(p);
# endif
#endif

    simplify_filename(rettv->vval.v_string);

#ifdef HAVE_READLINK
fail:
    vim_free(buf);
#endif
    rettv->v_type = VAR_STRING;
}

/*
 * "reverse({list})" function
 */
    static void
f_reverse(typval_T *argvars, typval_T *rettv)
{
    list_T      *l;
    listitem_T  *li, *ni;

    if (argvars[0].v_type != VAR_LIST)
        EMSG2(_(e_listarg), "reverse()");
    else if ((l = argvars[0].vval.v_list) != NULL
            && !tv_check_lock(l->lv_lock,
                                    (char_u *)N_("reverse() argument"), TRUE))
    {
        li = l->lv_last;
        l->lv_first = l->lv_last = NULL;
        l->lv_len = 0;
        while (li != NULL)
        {
            ni = li->li_prev;
            list_append(l, li);
            li = ni;
        }
        rettv_list_set(rettv, l);
        l->lv_idx = l->lv_len - l->lv_idx - 1;
    }
}

#define SP_NOMOVE       0x01        /* don't move cursor */
#define SP_REPEAT       0x02        /* repeat to find outer pair */
#define SP_RETCOUNT     0x04        /* return matchcount */
#define SP_SETPCMARK    0x08        /* set previous context mark */
#define SP_START        0x10        /* accept match at start position */
#define SP_SUBPAT       0x20        /* return nr of matching sub-pattern */
#define SP_END          0x40        /* leave cursor at end of match */
#define SP_COLUMN       0x80        /* start at cursor column */

static int get_search_arg(typval_T *varp, int *flagsp);

/*
 * Get flags for a search function.
 * Possibly sets "p_ws".
 * Returns BACKWARD, FORWARD or zero (for an error).
 */
    static int
get_search_arg(typval_T *varp, int *flagsp)
{
    int         dir = FORWARD;
    char_u      *flags;
    char_u      nbuf[NUMBUFLEN];
    int         mask;

    if (varp->v_type != VAR_UNKNOWN)
    {
        flags = get_tv_string_buf_chk(varp, nbuf);
        if (flags == NULL)
            return 0;           /* type error; errmsg already given */
        while (*flags != NUL)
        {
            switch (*flags)
            {
                case 'b': dir = BACKWARD; break;
                case 'w': p_ws = TRUE; break;
                case 'W': p_ws = FALSE; break;
                default:  mask = 0;
                          if (flagsp != NULL)
                             switch (*flags)
                             {
                                 case 'c': mask = SP_START; break;
                                 case 'e': mask = SP_END; break;
                                 case 'm': mask = SP_RETCOUNT; break;
                                 case 'n': mask = SP_NOMOVE; break;
                                 case 'p': mask = SP_SUBPAT; break;
                                 case 'r': mask = SP_REPEAT; break;
                                 case 's': mask = SP_SETPCMARK; break;
                                 case 'z': mask = SP_COLUMN; break;
                             }
                          if (mask == 0)
                          {
                              EMSG2(_(e_invarg2), flags);
                              dir = 0;
                          }
                          else
                              *flagsp |= mask;
            }
            if (dir == 0)
                break;
            ++flags;
        }
    }
    return dir;
}

/*
 * Shared by search() and searchpos() functions.
 */
    static int
search_cmn(typval_T *argvars, pos_T *match_pos, int *flagsp)
{
    int         flags;
    char_u      *pat;
    pos_T       pos;
    pos_T       save_cursor;
    int         save_p_ws = p_ws;
    int         dir;
    int         retval = 0;     /* default: FAIL */
    long        lnum_stop = 0;
    proftime_T  tm;
#ifdef FEAT_RELTIME
    long        time_limit = 0;
#endif
    int         options = SEARCH_KEEP;
    int         subpatnum;

    pat = get_tv_string(&argvars[0]);
    dir = get_search_arg(&argvars[1], flagsp);  /* may set p_ws */
    if (dir == 0)
        goto theend;
    flags = *flagsp;
    if (flags & SP_START)
        options |= SEARCH_START;
    if (flags & SP_END)
        options |= SEARCH_END;
    if (flags & SP_COLUMN)
        options |= SEARCH_COL;

    /* Optional arguments: line number to stop searching and timeout. */
    if (argvars[1].v_type != VAR_UNKNOWN && argvars[2].v_type != VAR_UNKNOWN)
    {
        lnum_stop = (long)get_tv_number_chk(&argvars[2], NULL);
        if (lnum_stop < 0)
            goto theend;
#ifdef FEAT_RELTIME
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            time_limit = (long)get_tv_number_chk(&argvars[3], NULL);
            if (time_limit < 0)
                goto theend;
        }
#endif
    }

#ifdef FEAT_RELTIME
    /* Set the time limit, if there is one. */
    profile_setlimit(time_limit, &tm);
#endif

    /*
     * This function does not accept SP_REPEAT and SP_RETCOUNT flags.
     * Check to make sure only those flags are set.
     * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
     * flags cannot be set. Check for that condition also.
     */
    if (((flags & (SP_REPEAT | SP_RETCOUNT)) != 0)
            || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
    {
        EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
        goto theend;
    }

    pos = save_cursor = curwin->w_cursor;
    subpatnum = searchit(curwin, curbuf, &pos, dir, pat, 1L,
                           options, RE_SEARCH, (linenr_T)lnum_stop, &tm, NULL);
    if (subpatnum != FAIL)
    {
        if (flags & SP_SUBPAT)
            retval = subpatnum;
        else
            retval = pos.lnum;
        if (flags & SP_SETPCMARK)
            setpcmark();
        curwin->w_cursor = pos;
        if (match_pos != NULL)
        {
            /* Store the match cursor position */
            match_pos->lnum = pos.lnum;
            match_pos->col = pos.col + 1;
        }
        /* "/$" will put the cursor after the end of the line, may need to
         * correct that here */
        check_cursor();
    }

    /* If 'n' flag is used: restore cursor position. */
    if (flags & SP_NOMOVE)
        curwin->w_cursor = save_cursor;
    else
        curwin->w_set_curswant = TRUE;
theend:
    p_ws = save_p_ws;

    return retval;
}

#ifdef FEAT_FLOAT

/*
 * round() is not in C90, use ceil() or floor() instead.
 */
    float_T
vim_round(float_T f)
{
    return f > 0 ? floor(f + 0.5) : ceil(f - 0.5);
}

/*
 * "round({float})" function
 */
    static void
f_round(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = vim_round(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "screenattr()" function
 */
    static void
f_screenattr(typval_T *argvars, typval_T *rettv)
{
    int         row;
    int         col;
    int         c;

    row = (int)get_tv_number_chk(&argvars[0], NULL) - 1;
    col = (int)get_tv_number_chk(&argvars[1], NULL) - 1;
    if (row < 0 || row >= screen_Rows
            || col < 0 || col >= screen_Columns)
        c = -1;
    else
        c = ScreenAttrs[LineOffset[row] + col];
    rettv->vval.v_number = c;
}

/*
 * "screenchar()" function
 */
    static void
f_screenchar(typval_T *argvars, typval_T *rettv)
{
    int         row;
    int         col;
    int         off;
    int         c;

    row = (int)get_tv_number_chk(&argvars[0], NULL) - 1;
    col = (int)get_tv_number_chk(&argvars[1], NULL) - 1;
    if (row < 0 || row >= screen_Rows
            || col < 0 || col >= screen_Columns)
        c = -1;
    else
    {
        off = LineOffset[row] + col;
#ifdef FEAT_MBYTE
        if (enc_utf8 && ScreenLinesUC[off] != 0)
            c = ScreenLinesUC[off];
        else
#endif
            c = ScreenLines[off];
    }
    rettv->vval.v_number = c;
}

/*
 * "screencol()" function
 *
 * First column is 1 to be consistent with virtcol().
 */
    static void
f_screencol(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = screen_screencol() + 1;
}

/*
 * "screenrow()" function
 */
    static void
f_screenrow(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = screen_screenrow() + 1;
}

/*
 * "search()" function
 */
    static void
f_search(typval_T *argvars, typval_T *rettv)
{
    int         flags = 0;

    rettv->vval.v_number = search_cmn(argvars, NULL, &flags);
}

/*
 * "searchdecl()" function
 */
    static void
f_searchdecl(typval_T *argvars, typval_T *rettv)
{
    int         locally = 1;
    int         thisblock = 0;
    int         error = FALSE;
    char_u      *name;

    rettv->vval.v_number = 1;   /* default: FAIL */

    name = get_tv_string_chk(&argvars[0]);
    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        locally = (int)get_tv_number_chk(&argvars[1], &error) == 0;
        if (!error && argvars[2].v_type != VAR_UNKNOWN)
            thisblock = (int)get_tv_number_chk(&argvars[2], &error) != 0;
    }
    if (!error && name != NULL)
        rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
                                     locally, thisblock, SEARCH_KEEP) == FAIL;
}

/*
 * Used by searchpair() and searchpairpos()
 */
    static int
searchpair_cmn(typval_T *argvars, pos_T *match_pos)
{
    char_u      *spat, *mpat, *epat;
    typval_T    *skip;
    int         save_p_ws = p_ws;
    int         dir;
    int         flags = 0;
    char_u      nbuf1[NUMBUFLEN];
    char_u      nbuf2[NUMBUFLEN];
    int         retval = 0;             /* default: FAIL */
    long        lnum_stop = 0;
    long        time_limit = 0;

    /* Get the three pattern arguments: start, middle, end. */
    spat = get_tv_string_chk(&argvars[0]);
    mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
    epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
    if (spat == NULL || mpat == NULL || epat == NULL)
        goto theend;        /* type error */

    /* Handle the optional fourth argument: flags */
    dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
    if (dir == 0)
        goto theend;

    /* Don't accept SP_END or SP_SUBPAT.
     * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
     */
    if ((flags & (SP_END | SP_SUBPAT)) != 0
            || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
    {
        EMSG2(_(e_invarg2), get_tv_string(&argvars[3]));
        goto theend;
    }

    /* Using 'r' implies 'W', otherwise it doesn't work. */
    if (flags & SP_REPEAT)
        p_ws = FALSE;

    /* Optional fifth argument: skip expression */
    if (argvars[3].v_type == VAR_UNKNOWN
            || argvars[4].v_type == VAR_UNKNOWN)
        skip = NULL;
    else
    {
        skip = &argvars[4];
        if (skip->v_type != VAR_FUNC && skip->v_type != VAR_PARTIAL
            && skip->v_type != VAR_STRING)
        {
            /* Type error */
            goto theend;
        }
        if (argvars[5].v_type != VAR_UNKNOWN)
        {
            lnum_stop = (long)get_tv_number_chk(&argvars[5], NULL);
            if (lnum_stop < 0)
                goto theend;
#ifdef FEAT_RELTIME
            if (argvars[6].v_type != VAR_UNKNOWN)
            {
                time_limit = (long)get_tv_number_chk(&argvars[6], NULL);
                if (time_limit < 0)
                    goto theend;
            }
#endif
        }
    }

    retval = do_searchpair(spat, mpat, epat, dir, skip, flags,
                                            match_pos, lnum_stop, time_limit);

theend:
    p_ws = save_p_ws;

    return retval;
}

/*
 * "searchpair()" function
 */
    static void
f_searchpair(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = searchpair_cmn(argvars, NULL);
}

/*
 * "searchpairpos()" function
 */
    static void
f_searchpairpos(typval_T *argvars, typval_T *rettv)
{
    pos_T       match_pos;
    int         lnum = 0;
    int         col = 0;

    if (rettv_list_alloc(rettv) == FAIL)
        return;

    if (searchpair_cmn(argvars, &match_pos) > 0)
    {
        lnum = match_pos.lnum;
        col = match_pos.col;
    }

    list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
    list_append_number(rettv->vval.v_list, (varnumber_T)col);
}

/*
 * Search for a start/middle/end thing.
 * Used by searchpair(), see its documentation for the details.
 * Returns 0 or -1 for no match,
 */
    long
do_searchpair(
    char_u      *spat,      /* start pattern */
    char_u      *mpat,      /* middle pattern */
    char_u      *epat,      /* end pattern */
    int         dir,        /* BACKWARD or FORWARD */
    typval_T    *skip,      /* skip expression */
    int         flags,      /* SP_SETPCMARK and other SP_ values */
    pos_T       *match_pos,
    linenr_T    lnum_stop,  /* stop at this line if not zero */
    long        time_limit UNUSED) /* stop after this many msec */
{
    char_u      *save_cpo;
    char_u      *pat, *pat2 = NULL, *pat3 = NULL;
    long        retval = 0;
    pos_T       pos;
    pos_T       firstpos;
    pos_T       foundpos;
    pos_T       save_cursor;
    pos_T       save_pos;
    int         n;
    int         r;
    int         nest = 1;
    int         use_skip = FALSE;
    int         err;
    int         options = SEARCH_KEEP;
    proftime_T  tm;

    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
    save_cpo = p_cpo;
    p_cpo = empty_option;

#ifdef FEAT_RELTIME
    /* Set the time limit, if there is one. */
    profile_setlimit(time_limit, &tm);
#endif

    /* Make two search patterns: start/end (pat2, for in nested pairs) and
     * start/middle/end (pat3, for the top pair). */
    pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 17));
    pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 25));
    if (pat2 == NULL || pat3 == NULL)
        goto theend;
    sprintf((char *)pat2, "\\m\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
    if (*mpat == NUL)
        STRCPY(pat3, pat2);
    else
        sprintf((char *)pat3, "\\m\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
                                                            spat, epat, mpat);
    if (flags & SP_START)
        options |= SEARCH_START;

    if (skip != NULL)
    {
        /* Empty string means to not use the skip expression. */
        if (skip->v_type == VAR_STRING || skip->v_type == VAR_FUNC)
            use_skip = skip->vval.v_string != NULL
                                                && *skip->vval.v_string != NUL;
    }

    save_cursor = curwin->w_cursor;
    pos = curwin->w_cursor;
    CLEAR_POS(&firstpos);
    CLEAR_POS(&foundpos);
    pat = pat3;
    for (;;)
    {
        n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
                                     options, RE_SEARCH, lnum_stop, &tm, NULL);
        if (n == FAIL || (firstpos.lnum != 0 && EQUAL_POS(pos, firstpos)))
            /* didn't find it or found the first match again: FAIL */
            break;

        if (firstpos.lnum == 0)
            firstpos = pos;
        if (EQUAL_POS(pos, foundpos))
        {
            /* Found the same position again.  Can happen with a pattern that
             * has "\zs" at the end and searching backwards.  Advance one
             * character and try again. */
            if (dir == BACKWARD)
                decl(&pos);
            else
                incl(&pos);
        }
        foundpos = pos;

        /* clear the start flag to avoid getting stuck here */
        options &= ~SEARCH_START;

        /* If the skip pattern matches, ignore this match. */
        if (use_skip)
        {
            save_pos = curwin->w_cursor;
            curwin->w_cursor = pos;
            err = FALSE;
            r = eval_expr_to_bool(skip, &err);
            curwin->w_cursor = save_pos;
            if (err)
            {
                /* Evaluating {skip} caused an error, break here. */
                curwin->w_cursor = save_cursor;
                retval = -1;
                break;
            }
            if (r)
                continue;
        }

        if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
        {
            /* Found end when searching backwards or start when searching
             * forward: nested pair. */
            ++nest;
            pat = pat2;         /* nested, don't search for middle */
        }
        else
        {
            /* Found end when searching forward or start when searching
             * backward: end of (nested) pair; or found middle in outer pair. */
            if (--nest == 1)
                pat = pat3;     /* outer level, search for middle */
        }

        if (nest == 0)
        {
            /* Found the match: return matchcount or line number. */
            if (flags & SP_RETCOUNT)
                ++retval;
            else
                retval = pos.lnum;
            if (flags & SP_SETPCMARK)
                setpcmark();
            curwin->w_cursor = pos;
            if (!(flags & SP_REPEAT))
                break;
            nest = 1;       /* search for next unmatched */
        }
    }

    if (match_pos != NULL)
    {
        /* Store the match cursor position */
        match_pos->lnum = curwin->w_cursor.lnum;
        match_pos->col = curwin->w_cursor.col + 1;
    }

    /* If 'n' flag is used or search failed: restore cursor position. */
    if ((flags & SP_NOMOVE) || retval == 0)
        curwin->w_cursor = save_cursor;

theend:
    vim_free(pat2);
    vim_free(pat3);
    if (p_cpo == empty_option)
        p_cpo = save_cpo;
    else
        /* Darn, evaluating the {skip} expression changed the value. */
        free_string_option(save_cpo);

    return retval;
}

/*
 * "searchpos()" function
 */
    static void
f_searchpos(typval_T *argvars, typval_T *rettv)
{
    pos_T       match_pos;
    int         lnum = 0;
    int         col = 0;
    int         n;
    int         flags = 0;

    if (rettv_list_alloc(rettv) == FAIL)
        return;

    n = search_cmn(argvars, &match_pos, &flags);
    if (n > 0)
    {
        lnum = match_pos.lnum;
        col = match_pos.col;
    }

    list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
    list_append_number(rettv->vval.v_list, (varnumber_T)col);
    if (flags & SP_SUBPAT)
        list_append_number(rettv->vval.v_list, (varnumber_T)n);
}

    static void
f_server2client(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_CLIENTSERVER
    char_u      buf[NUMBUFLEN];
    char_u      *server = get_tv_string_chk(&argvars[0]);
    char_u      *reply = get_tv_string_buf_chk(&argvars[1], buf);

    rettv->vval.v_number = -1;
    if (server == NULL || reply == NULL)
        return;
    if (check_restricted() || check_secure())
        return;
# ifdef FEAT_X11
    if (check_connection() == FAIL)
        return;
# endif

    if (serverSendReply(server, reply) < 0)
    {
        EMSG(_("E258: Unable to send to client"));
        return;
    }
    rettv->vval.v_number = 0;
#else
    rettv->vval.v_number = -1;
#endif
}

    static void
f_serverlist(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u      *r = NULL;

#ifdef FEAT_CLIENTSERVER
# ifdef WIN32
    r = serverGetVimNames();
# else
    make_connection();
    if (X_DISPLAY != NULL)
        r = serverGetVimNames(X_DISPLAY);
# endif
#endif
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = r;
}

/*
 * Set line or list of lines in buffer "buf".
 */
    static void
set_buffer_lines(buf_T *buf, linenr_T lnum, typval_T *lines, typval_T *rettv)
{
    char_u      *line = NULL;
    list_T      *l = NULL;
    listitem_T  *li = NULL;
    long        added = 0;
    linenr_T    lcount;
    buf_T       *curbuf_save = NULL;
    win_T       *curwin_save = NULL;
    int         is_curbuf = buf == curbuf;

    /* When using the current buffer ml_mfp will be set if needed.  Useful when
     * setline() is used on startup.  For other buffers the buffer must be
     * loaded. */
    if (buf == NULL || (!is_curbuf && buf->b_ml.ml_mfp == NULL) || lnum < 1)
    {
        rettv->vval.v_number = 1;       /* FAIL */
        return;
    }

    if (!is_curbuf)
    {
        wininfo_T *wip;

        curbuf_save = curbuf;
        curwin_save = curwin;
        curbuf = buf;
        for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
        {
            if (wip->wi_win != NULL)
            {
                curwin = wip->wi_win;
                break;
            }
        }
    }

    lcount = curbuf->b_ml.ml_line_count;

    if (lines->v_type == VAR_LIST)
    {
        l = lines->vval.v_list;
        li = l->lv_first;
    }
    else
        line = get_tv_string_chk(lines);

    /* default result is zero == OK */
    for (;;)
    {
        if (l != NULL)
        {
            /* list argument, get next string */
            if (li == NULL)
                break;
            line = get_tv_string_chk(&li->li_tv);
            li = li->li_next;
        }

        rettv->vval.v_number = 1;       /* FAIL */
        if (line == NULL || lnum > curbuf->b_ml.ml_line_count + 1)
            break;

        /* When coming here from Insert mode, sync undo, so that this can be
         * undone separately from what was previously inserted. */
        if (u_sync_once == 2)
        {
            u_sync_once = 1; /* notify that u_sync() was called */
            u_sync(TRUE);
        }

        if (lnum <= curbuf->b_ml.ml_line_count)
        {
            /* existing line, replace it */
            if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
            {
                changed_bytes(lnum, 0);
                if (is_curbuf && lnum == curwin->w_cursor.lnum)
                    check_cursor_col();
                rettv->vval.v_number = 0;       /* OK */
            }
        }
        else if (added > 0 || u_save(lnum - 1, lnum) == OK)
        {
            /* lnum is one past the last line, append the line */
            ++added;
            if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
                rettv->vval.v_number = 0;       /* OK */
        }

        if (l == NULL)                  /* only one string argument */
            break;
        ++lnum;
    }

    if (added > 0)
        appended_lines_mark(lcount, added);

    if (!is_curbuf)
    {
        curbuf = curbuf_save;
        curwin = curwin_save;
    }
}

/*
 * "setbufline()" function
 */
    static void
f_setbufline(argvars, rettv)
    typval_T    *argvars;
    typval_T    *rettv;
{
    linenr_T    lnum;
    buf_T       *buf;

    buf = get_buf_tv(&argvars[0], FALSE);
    if (buf == NULL)
        rettv->vval.v_number = 1; /* FAIL */
    else
    {
        lnum = get_tv_lnum_buf(&argvars[1], buf);

        set_buffer_lines(buf, lnum, &argvars[2], rettv);
    }
}

/*
 * "setbufvar()" function
 */
    static void
f_setbufvar(typval_T *argvars, typval_T *rettv UNUSED)
{
    buf_T       *buf;
    char_u      *varname, *bufvarname;
    typval_T    *varp;
    char_u      nbuf[NUMBUFLEN];

    if (check_restricted() || check_secure())
        return;
    (void)get_tv_number(&argvars[0]);       /* issue errmsg if type error */
    varname = get_tv_string_chk(&argvars[1]);
    buf = get_buf_tv(&argvars[0], FALSE);
    varp = &argvars[2];

    if (buf != NULL && varname != NULL && varp != NULL)
    {
        if (*varname == '&')
        {
            long        numval;
            char_u      *strval;
            int         error = FALSE;
            aco_save_T  aco;

            /* set curbuf to be our buf, temporarily */
            aucmd_prepbuf(&aco, buf);

            ++varname;
            numval = (long)get_tv_number_chk(varp, &error);
            strval = get_tv_string_buf_chk(varp, nbuf);
            if (!error && strval != NULL)
                set_option_value(varname, numval, strval, OPT_LOCAL);

            /* reset notion of buffer */
            aucmd_restbuf(&aco);
        }
        else
        {
            buf_T *save_curbuf = curbuf;

            bufvarname = alloc((unsigned)STRLEN(varname) + 3);
            if (bufvarname != NULL)
            {
                curbuf = buf;
                STRCPY(bufvarname, "b:");
                STRCPY(bufvarname + 2, varname);
                set_var(bufvarname, varp, TRUE);
                vim_free(bufvarname);
                curbuf = save_curbuf;
            }
        }
    }
}

    static void
f_setcharsearch(typval_T *argvars, typval_T *rettv UNUSED)
{
    dict_T      *d;
    dictitem_T  *di;
    char_u      *csearch;

    if (argvars[0].v_type != VAR_DICT)
    {
        EMSG(_(e_dictreq));
        return;
    }

    if ((d = argvars[0].vval.v_dict) != NULL)
    {
        csearch = get_dict_string(d, (char_u *)"char", FALSE);
        if (csearch != NULL)
        {
#ifdef FEAT_MBYTE
            if (enc_utf8)
            {
                int pcc[MAX_MCO];
                int c = utfc_ptr2char(csearch, pcc);

                set_last_csearch(c, csearch, utfc_ptr2len(csearch));
            }
            else
#endif
                set_last_csearch(PTR2CHAR(csearch),
                                                csearch, MB_PTR2LEN(csearch));
        }

        di = dict_find(d, (char_u *)"forward", -1);
        if (di != NULL)
            set_csearch_direction((int)get_tv_number(&di->di_tv)
                                                        ? FORWARD : BACKWARD);

        di = dict_find(d, (char_u *)"until", -1);
        if (di != NULL)
            set_csearch_until(!!get_tv_number(&di->di_tv));
    }
}

/*
 * "setcmdpos()" function
 */
    static void
f_setcmdpos(typval_T *argvars, typval_T *rettv)
{
    int         pos = (int)get_tv_number(&argvars[0]) - 1;

    if (pos >= 0)
        rettv->vval.v_number = set_cmdline_pos(pos);
}

/*
 * "setfperm({fname}, {mode})" function
 */
    static void
f_setfperm(typval_T *argvars, typval_T *rettv)
{
    char_u      *fname;
    char_u      modebuf[NUMBUFLEN];
    char_u      *mode_str;
    int         i;
    int         mask;
    int         mode = 0;

    rettv->vval.v_number = 0;
    fname = get_tv_string_chk(&argvars[0]);
    if (fname == NULL)
        return;
    mode_str = get_tv_string_buf_chk(&argvars[1], modebuf);
    if (mode_str == NULL)
        return;
    if (STRLEN(mode_str) != 9)
    {
        EMSG2(_(e_invarg2), mode_str);
        return;
    }

    mask = 1;
    for (i = 8; i >= 0; --i)
    {
        if (mode_str[i] != '-')
            mode |= mask;
        mask = mask << 1;
    }
    rettv->vval.v_number = mch_setperm(fname, mode) == OK;
}

/*
 * "setline()" function
 */
    static void
f_setline(typval_T *argvars, typval_T *rettv)
{
    linenr_T    lnum = get_tv_lnum(&argvars[0]);

    set_buffer_lines(curbuf, lnum, &argvars[1], rettv);
}

static void set_qf_ll_list(win_T *wp, typval_T *list_arg, typval_T *action_arg, typval_T *what_arg, typval_T *rettv);

/*
 * Used by "setqflist()" and "setloclist()" functions
 */
    static void
set_qf_ll_list(
    win_T       *wp UNUSED,
    typval_T    *list_arg UNUSED,
    typval_T    *action_arg UNUSED,
    typval_T    *what_arg UNUSED,
    typval_T    *rettv)
{
#ifdef FEAT_QUICKFIX
    static char *e_invact = N_("E927: Invalid action: '%s'");
    char_u      *act;
    int         action = 0;
#endif

    rettv->vval.v_number = -1;

#ifdef FEAT_QUICKFIX
    if (list_arg->v_type != VAR_LIST)
        EMSG(_(e_listreq));
    else
    {
        list_T  *l = list_arg->vval.v_list;
        dict_T  *d = NULL;
        int     valid_dict = TRUE;

        if (action_arg->v_type == VAR_STRING)
        {
            act = get_tv_string_chk(action_arg);
            if (act == NULL)
                return;         /* type error; errmsg already given */
            if ((*act == 'a' || *act == 'r' || *act == ' ' || *act == 'f') &&
                    act[1] == NUL)
                action = *act;
            else
                EMSG2(_(e_invact), act);
        }
        else if (action_arg->v_type == VAR_UNKNOWN)
            action = ' ';
        else
            EMSG(_(e_stringreq));

        if (action_arg->v_type != VAR_UNKNOWN
                && what_arg->v_type != VAR_UNKNOWN)
        {
            if (what_arg->v_type == VAR_DICT)
                d = what_arg->vval.v_dict;
            else
            {
                EMSG(_(e_dictreq));
                valid_dict = FALSE;
            }
        }

        if (l != NULL && action && valid_dict && set_errorlist(wp, l, action,
          (char_u *)(wp == NULL ? ":setqflist()" : ":setloclist()"), d) == OK)
            rettv->vval.v_number = 0;
    }
#endif
}

/*
 * "setloclist()" function
 */
    static void
f_setloclist(typval_T *argvars, typval_T *rettv)
{
    win_T       *win;

    rettv->vval.v_number = -1;

    win = find_win_by_nr(&argvars[0], NULL);
    if (win != NULL)
        set_qf_ll_list(win, &argvars[1], &argvars[2], &argvars[3], rettv);
}

/*
 * "setmatches()" function
 */
    static void
f_setmatches(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_SEARCH_EXTRA
    list_T      *l;
    listitem_T  *li;
    dict_T      *d;
    list_T      *s = NULL;

    rettv->vval.v_number = -1;
    if (argvars[0].v_type != VAR_LIST)
    {
        EMSG(_(e_listreq));
        return;
    }
    if ((l = argvars[0].vval.v_list) != NULL)
    {

        /* To some extent make sure that we are dealing with a list from
         * "getmatches()". */
        li = l->lv_first;
        while (li != NULL)
        {
            if (li->li_tv.v_type != VAR_DICT
                    || (d = li->li_tv.vval.v_dict) == NULL)
            {
                EMSG(_(e_invarg));
                return;
            }
            if (!(dict_find(d, (char_u *)"group", -1) != NULL
                        && (dict_find(d, (char_u *)"pattern", -1) != NULL
                            || dict_find(d, (char_u *)"pos1", -1) != NULL)
                        && dict_find(d, (char_u *)"priority", -1) != NULL
                        && dict_find(d, (char_u *)"id", -1) != NULL))
            {
                EMSG(_(e_invarg));
                return;
            }
            li = li->li_next;
        }

        clear_matches(curwin);
        li = l->lv_first;
        while (li != NULL)
        {
            int         i = 0;
            char_u      buf[5];
            dictitem_T  *di;
            char_u      *group;
            int         priority;
            int         id;
            char_u      *conceal;

            d = li->li_tv.vval.v_dict;
            if (dict_find(d, (char_u *)"pattern", -1) == NULL)
            {
                if (s == NULL)
                {
                    s = list_alloc();
                    if (s == NULL)
                        return;
                }

                /* match from matchaddpos() */
                for (i = 1; i < 9; i++)
                {
                    sprintf((char *)buf, (char *)"pos%d", i);
                    if ((di = dict_find(d, (char_u *)buf, -1)) != NULL)
                    {
                        if (di->di_tv.v_type != VAR_LIST)
                            return;

                        list_append_tv(s, &di->di_tv);
                        s->lv_refcount++;
                    }
                    else
                        break;
                }
            }

            group = get_dict_string(d, (char_u *)"group", TRUE);
            priority = (int)get_dict_number(d, (char_u *)"priority");
            id = (int)get_dict_number(d, (char_u *)"id");
            conceal = dict_find(d, (char_u *)"conceal", -1) != NULL
                              ? get_dict_string(d, (char_u *)"conceal", TRUE)
                              : NULL;
            if (i == 0)
            {
                match_add(curwin, group,
                    get_dict_string(d, (char_u *)"pattern", FALSE),
                    priority, id, NULL, conceal);
            }
            else
            {
                match_add(curwin, group, NULL, priority, id, s, conceal);
                list_unref(s);
                s = NULL;
            }
            vim_free(group);
            vim_free(conceal);

            li = li->li_next;
        }
        rettv->vval.v_number = 0;
    }
#endif
}

/*
 * "setpos()" function
 */
    static void
f_setpos(typval_T *argvars, typval_T *rettv)
{
    pos_T       pos;
    int         fnum;
    char_u      *name;
    colnr_T     curswant = -1;

    rettv->vval.v_number = -1;
    name = get_tv_string_chk(argvars);
    if (name != NULL)
    {
        if (list2fpos(&argvars[1], &pos, &fnum, &curswant) == OK)
        {
            if (--pos.col < 0)
                pos.col = 0;
            if (name[0] == '.' && name[1] == NUL)
            {
                /* set cursor; "fnum" is ignored */
                curwin->w_cursor = pos;
                if (curswant >= 0)
                {
                    curwin->w_curswant = curswant - 1;
                    curwin->w_set_curswant = FALSE;
                }
                check_cursor();
                rettv->vval.v_number = 0;
            }
            else if (name[0] == '\'' && name[1] != NUL && name[2] == NUL)
            {
                /* set mark */
                if (setmark_pos(name[1], &pos, fnum) == OK)
                    rettv->vval.v_number = 0;
            }
            else
                EMSG(_(e_invarg));
        }
    }
}

/*
 * "setqflist()" function
 */
    static void
f_setqflist(typval_T *argvars, typval_T *rettv)
{
    set_qf_ll_list(NULL, &argvars[0], &argvars[1], &argvars[2], rettv);
}

/*
 * "setreg()" function
 */
    static void
f_setreg(typval_T *argvars, typval_T *rettv)
{
    int         regname;
    char_u      *strregname;
    char_u      *stropt;
    char_u      *strval;
    int         append;
    char_u      yank_type;
    long        block_len;

    block_len = -1;
    yank_type = MAUTO;
    append = FALSE;

    strregname = get_tv_string_chk(argvars);
    rettv->vval.v_number = 1;           /* FAIL is default */

    if (strregname == NULL)
        return;         /* type error; errmsg already given */
    regname = *strregname;
    if (regname == 0 || regname == '@')
        regname = '"';

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        stropt = get_tv_string_chk(&argvars[2]);
        if (stropt == NULL)
            return;             /* type error */
        for (; *stropt != NUL; ++stropt)
            switch (*stropt)
            {
                case 'a': case 'A':     /* append */
                    append = TRUE;
                    break;
                case 'v': case 'c':     /* character-wise selection */
                    yank_type = MCHAR;
                    break;
                case 'V': case 'l':     /* line-wise selection */
                    yank_type = MLINE;
                    break;
                case 'b': case Ctrl_V:  /* block-wise selection */
                    yank_type = MBLOCK;
                    if (VIM_ISDIGIT(stropt[1]))
                    {
                        ++stropt;
                        block_len = getdigits(&stropt) - 1;
                        --stropt;
                    }
                    break;
            }
    }

    if (argvars[1].v_type == VAR_LIST)
    {
        char_u          **lstval;
        char_u          **allocval;
        char_u          buf[NUMBUFLEN];
        char_u          **curval;
        char_u          **curallocval;
        list_T          *ll = argvars[1].vval.v_list;
        listitem_T      *li;
        int             len;

        /* If the list is NULL handle like an empty list. */
        len = ll == NULL ? 0 : ll->lv_len;

        /* First half: use for pointers to result lines; second half: use for
         * pointers to allocated copies. */
        lstval = (char_u **)alloc(sizeof(char_u *) * ((len + 1) * 2));
        if (lstval == NULL)
            return;
        curval = lstval;
        allocval = lstval + len + 2;
        curallocval = allocval;

        for (li = ll == NULL ? NULL : ll->lv_first; li != NULL;
                                                             li = li->li_next)
        {
            strval = get_tv_string_buf_chk(&li->li_tv, buf);
            if (strval == NULL)
                goto free_lstval;
            if (strval == buf)
            {
                /* Need to make a copy, next get_tv_string_buf_chk() will
                 * overwrite the string. */
                strval = vim_strsave(buf);
                if (strval == NULL)
                    goto free_lstval;
                *curallocval++ = strval;
            }
            *curval++ = strval;
        }
        *curval++ = NULL;

        write_reg_contents_lst(regname, lstval, -1,
                                                append, yank_type, block_len);
free_lstval:
        while (curallocval > allocval)
            vim_free(*--curallocval);
        vim_free(lstval);
    }
    else
    {
        strval = get_tv_string_chk(&argvars[1]);
        if (strval == NULL)
            return;
        write_reg_contents_ex(regname, strval, -1,
                                                append, yank_type, block_len);
    }
    rettv->vval.v_number = 0;
}

/*
 * "settabvar()" function
 */
    static void
f_settabvar(typval_T *argvars, typval_T *rettv)
{
    tabpage_T   *save_curtab;
    tabpage_T   *tp;
    char_u      *varname, *tabvarname;
    typval_T    *varp;

    rettv->vval.v_number = 0;

    if (check_restricted() || check_secure())
        return;

    tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
    varname = get_tv_string_chk(&argvars[1]);
    varp = &argvars[2];

    if (varname != NULL && varp != NULL && tp != NULL)
    {
        save_curtab = curtab;
        goto_tabpage_tp(tp, FALSE, FALSE);

        tabvarname = alloc((unsigned)STRLEN(varname) + 3);
        if (tabvarname != NULL)
        {
            STRCPY(tabvarname, "t:");
            STRCPY(tabvarname + 2, varname);
            set_var(tabvarname, varp, TRUE);
            vim_free(tabvarname);
        }

        /* Restore current tabpage */
        if (valid_tabpage(save_curtab))
            goto_tabpage_tp(save_curtab, FALSE, FALSE);
    }
}

/*
 * "settabwinvar()" function
 */
    static void
f_settabwinvar(typval_T *argvars, typval_T *rettv)
{
    setwinvar(argvars, rettv, 1);
}

/*
 * "setwinvar()" function
 */
    static void
f_setwinvar(typval_T *argvars, typval_T *rettv)
{
    setwinvar(argvars, rettv, 0);
}

#ifdef FEAT_CRYPT
/*
 * "sha256({string})" function
 */
    static void
f_sha256(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;

    p = get_tv_string(&argvars[0]);
    rettv->vval.v_string = vim_strsave(
                                    sha256_bytes(p, (int)STRLEN(p), NULL, 0));
    rettv->v_type = VAR_STRING;
}
#endif /* FEAT_CRYPT */

/*
 * "shellescape({string})" function
 */
    static void
f_shellescape(typval_T *argvars, typval_T *rettv)
{
    int do_special = non_zero_arg(&argvars[1]);

    rettv->vval.v_string = vim_strsave_shellescape(
                           get_tv_string(&argvars[0]), do_special, do_special);
    rettv->v_type = VAR_STRING;
}

/*
 * shiftwidth() function
 */
    static void
f_shiftwidth(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->vval.v_number = get_sw_value(curbuf);
}

/*
 * "simplify()" function
 */
    static void
f_simplify(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;

    p = get_tv_string(&argvars[0]);
    rettv->vval.v_string = vim_strsave(p);
    simplify_filename(rettv->vval.v_string);    /* simplify in place */
    rettv->v_type = VAR_STRING;
}

#ifdef FEAT_FLOAT
/*
 * "sin()" function
 */
    static void
f_sin(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = sin(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "sinh()" function
 */
    static void
f_sinh(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = sinh(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

static int
#ifdef __BORLANDC__
    _RTLENTRYF
#endif
        item_compare(const void *s1, const void *s2);
static int
#ifdef __BORLANDC__
    _RTLENTRYF
#endif
        item_compare2(const void *s1, const void *s2);

/* struct used in the array that's given to qsort() */
typedef struct
{
    listitem_T  *item;
    int         idx;
} sortItem_T;

/* struct storing information about current sort */
typedef struct
{
    int         item_compare_ic;
    int         item_compare_numeric;
    int         item_compare_numbers;
#ifdef FEAT_FLOAT
    int         item_compare_float;
#endif
    char_u      *item_compare_func;
    partial_T   *item_compare_partial;
    dict_T      *item_compare_selfdict;
    int         item_compare_func_err;
    int         item_compare_keep_zero;
} sortinfo_T;
static sortinfo_T       *sortinfo = NULL;
static void     do_sort_uniq(typval_T *argvars, typval_T *rettv, int sort);
#define ITEM_COMPARE_FAIL 999

/*
 * Compare functions for f_sort() and f_uniq() below.
 */
    static int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
item_compare(const void *s1, const void *s2)
{
    sortItem_T  *si1, *si2;
    typval_T    *tv1, *tv2;
    char_u      *p1, *p2;
    char_u      *tofree1 = NULL, *tofree2 = NULL;
    int         res;
    char_u      numbuf1[NUMBUFLEN];
    char_u      numbuf2[NUMBUFLEN];

    si1 = (sortItem_T *)s1;
    si2 = (sortItem_T *)s2;
    tv1 = &si1->item->li_tv;
    tv2 = &si2->item->li_tv;

    if (sortinfo->item_compare_numbers)
    {
        varnumber_T     v1 = get_tv_number(tv1);
        varnumber_T     v2 = get_tv_number(tv2);

        return v1 == v2 ? 0 : v1 > v2 ? 1 : -1;
    }

#ifdef FEAT_FLOAT
    if (sortinfo->item_compare_float)
    {
        float_T v1 = get_tv_float(tv1);
        float_T v2 = get_tv_float(tv2);

        return v1 == v2 ? 0 : v1 > v2 ? 1 : -1;
    }
#endif

    /* tv2string() puts quotes around a string and allocates memory.  Don't do
     * that for string variables. Use a single quote when comparing with a
     * non-string to do what the docs promise. */
    if (tv1->v_type == VAR_STRING)
    {
        if (tv2->v_type != VAR_STRING || sortinfo->item_compare_numeric)
            p1 = (char_u *)"'";
        else
            p1 = tv1->vval.v_string;
    }
    else
        p1 = tv2string(tv1, &tofree1, numbuf1, 0);
    if (tv2->v_type == VAR_STRING)
    {
        if (tv1->v_type != VAR_STRING || sortinfo->item_compare_numeric)
            p2 = (char_u *)"'";
        else
            p2 = tv2->vval.v_string;
    }
    else
        p2 = tv2string(tv2, &tofree2, numbuf2, 0);
    if (p1 == NULL)
        p1 = (char_u *)"";
    if (p2 == NULL)
        p2 = (char_u *)"";
    if (!sortinfo->item_compare_numeric)
    {
        if (sortinfo->item_compare_ic)
            res = STRICMP(p1, p2);
        else
            res = STRCMP(p1, p2);
    }
    else
    {
        double n1, n2;
        n1 = strtod((char *)p1, (char **)&p1);
        n2 = strtod((char *)p2, (char **)&p2);
        res = n1 == n2 ? 0 : n1 > n2 ? 1 : -1;
    }

    /* When the result would be zero, compare the item indexes.  Makes the
     * sort stable. */
    if (res == 0 && !sortinfo->item_compare_keep_zero)
        res = si1->idx > si2->idx ? 1 : -1;

    vim_free(tofree1);
    vim_free(tofree2);
    return res;
}

    static int
#ifdef __BORLANDC__
_RTLENTRYF
#endif
item_compare2(const void *s1, const void *s2)
{
    sortItem_T  *si1, *si2;
    int         res;
    typval_T    rettv;
    typval_T    argv[3];
    int         dummy;
    char_u      *func_name;
    partial_T   *partial = sortinfo->item_compare_partial;

    /* shortcut after failure in previous call; compare all items equal */
    if (sortinfo->item_compare_func_err)
        return 0;

    si1 = (sortItem_T *)s1;
    si2 = (sortItem_T *)s2;

    if (partial == NULL)
        func_name = sortinfo->item_compare_func;
    else
        func_name = partial_name(partial);

    /* Copy the values.  This is needed to be able to set v_lock to VAR_FIXED
     * in the copy without changing the original list items. */
    copy_tv(&si1->item->li_tv, &argv[0]);
    copy_tv(&si2->item->li_tv, &argv[1]);

    rettv.v_type = VAR_UNKNOWN;         /* clear_tv() uses this */
    res = call_func(func_name, (int)STRLEN(func_name),
                                 &rettv, 2, argv, NULL, 0L, 0L, &dummy, TRUE,
                                 partial, sortinfo->item_compare_selfdict);
    clear_tv(&argv[0]);
    clear_tv(&argv[1]);

    if (res == FAIL)
        res = ITEM_COMPARE_FAIL;
    else
        res = (int)get_tv_number_chk(&rettv, &sortinfo->item_compare_func_err);
    if (sortinfo->item_compare_func_err)
        res = ITEM_COMPARE_FAIL;  /* return value has wrong type */
    clear_tv(&rettv);

    /* When the result would be zero, compare the pointers themselves.  Makes
     * the sort stable. */
    if (res == 0 && !sortinfo->item_compare_keep_zero)
        res = si1->idx > si2->idx ? 1 : -1;

    return res;
}

/*
 * "sort({list})" function
 */
    static void
do_sort_uniq(typval_T *argvars, typval_T *rettv, int sort)
{
    list_T      *l;
    listitem_T  *li;
    sortItem_T  *ptrs;
    sortinfo_T  *old_sortinfo;
    sortinfo_T  info;
    long        len;
    long        i;

    /* Pointer to current info struct used in compare function. Save and
     * restore the current one for nested calls. */
    old_sortinfo = sortinfo;
    sortinfo = &info;

    if (argvars[0].v_type != VAR_LIST)
        EMSG2(_(e_listarg), sort ? "sort()" : "uniq()");
    else
    {
        l = argvars[0].vval.v_list;
        if (l == NULL || tv_check_lock(l->lv_lock,
             (char_u *)(sort ? N_("sort() argument") : N_("uniq() argument")),
                                                                        TRUE))
            goto theend;
        rettv_list_set(rettv, l);

        len = list_len(l);
        if (len <= 1)
            goto theend;        /* short list sorts pretty quickly */

        info.item_compare_ic = FALSE;
        info.item_compare_numeric = FALSE;
        info.item_compare_numbers = FALSE;
#ifdef FEAT_FLOAT
        info.item_compare_float = FALSE;
#endif
        info.item_compare_func = NULL;
        info.item_compare_partial = NULL;
        info.item_compare_selfdict = NULL;
        if (argvars[1].v_type != VAR_UNKNOWN)
        {
            /* optional second argument: {func} */
            if (argvars[1].v_type == VAR_FUNC)
                info.item_compare_func = argvars[1].vval.v_string;
            else if (argvars[1].v_type == VAR_PARTIAL)
                info.item_compare_partial = argvars[1].vval.v_partial;
            else
            {
                int         error = FALSE;

                i = (long)get_tv_number_chk(&argvars[1], &error);
                if (error)
                    goto theend;        /* type error; errmsg already given */
                if (i == 1)
                    info.item_compare_ic = TRUE;
                else if (argvars[1].v_type != VAR_NUMBER)
                    info.item_compare_func = get_tv_string(&argvars[1]);
                else if (i != 0)
                {
                    EMSG(_(e_invarg));
                    goto theend;
                }
                if (info.item_compare_func != NULL)
                {
                    if (*info.item_compare_func == NUL)
                    {
                        /* empty string means default sort */
                        info.item_compare_func = NULL;
                    }
                    else if (STRCMP(info.item_compare_func, "n") == 0)
                    {
                        info.item_compare_func = NULL;
                        info.item_compare_numeric = TRUE;
                    }
                    else if (STRCMP(info.item_compare_func, "N") == 0)
                    {
                        info.item_compare_func = NULL;
                        info.item_compare_numbers = TRUE;
                    }
#ifdef FEAT_FLOAT
                    else if (STRCMP(info.item_compare_func, "f") == 0)
                    {
                        info.item_compare_func = NULL;
                        info.item_compare_float = TRUE;
                    }
#endif
                    else if (STRCMP(info.item_compare_func, "i") == 0)
                    {
                        info.item_compare_func = NULL;
                        info.item_compare_ic = TRUE;
                    }
                }
            }

            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                /* optional third argument: {dict} */
                if (argvars[2].v_type != VAR_DICT)
                {
                    EMSG(_(e_dictreq));
                    goto theend;
                }
                info.item_compare_selfdict = argvars[2].vval.v_dict;
            }
        }

        /* Make an array with each entry pointing to an item in the List. */
        ptrs = (sortItem_T *)alloc((int)(len * sizeof(sortItem_T)));
        if (ptrs == NULL)
            goto theend;

        i = 0;
        if (sort)
        {
            /* sort(): ptrs will be the list to sort */
            for (li = l->lv_first; li != NULL; li = li->li_next)
            {
                ptrs[i].item = li;
                ptrs[i].idx = i;
                ++i;
            }

            info.item_compare_func_err = FALSE;
            info.item_compare_keep_zero = FALSE;
            /* test the compare function */
            if ((info.item_compare_func != NULL
                                         || info.item_compare_partial != NULL)
                    && item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
                                                         == ITEM_COMPARE_FAIL)
                EMSG(_("E702: Sort compare function failed"));
            else
            {
                /* Sort the array with item pointers. */
                qsort((void *)ptrs, (size_t)len, sizeof(sortItem_T),
                    info.item_compare_func == NULL
                                          && info.item_compare_partial == NULL
                                               ? item_compare : item_compare2);

                if (!info.item_compare_func_err)
                {
                    /* Clear the List and append the items in sorted order. */
                    l->lv_first = l->lv_last = l->lv_idx_item = NULL;
                    l->lv_len = 0;
                    for (i = 0; i < len; ++i)
                        list_append(l, ptrs[i].item);
                }
            }
        }
        else
        {
            int (*item_compare_func_ptr)(const void *, const void *);

            /* f_uniq(): ptrs will be a stack of items to remove */
            info.item_compare_func_err = FALSE;
            info.item_compare_keep_zero = TRUE;
            item_compare_func_ptr = info.item_compare_func != NULL
                                          || info.item_compare_partial != NULL
                                               ? item_compare2 : item_compare;

            for (li = l->lv_first; li != NULL && li->li_next != NULL;
                                                             li = li->li_next)
            {
                if (item_compare_func_ptr((void *)&li, (void *)&li->li_next)
                                                                         == 0)
                    ptrs[i++].item = li;
                if (info.item_compare_func_err)
                {
                    EMSG(_("E882: Uniq compare function failed"));
                    break;
                }
            }

            if (!info.item_compare_func_err)
            {
                while (--i >= 0)
                {
                    li = ptrs[i].item->li_next;
                    ptrs[i].item->li_next = li->li_next;
                    if (li->li_next != NULL)
                        li->li_next->li_prev = ptrs[i].item;
                    else
                        l->lv_last = ptrs[i].item;
                    list_fix_watch(l, li);
                    listitem_free(li);
                    l->lv_len--;
                }
            }
        }

        vim_free(ptrs);
    }
theend:
    sortinfo = old_sortinfo;
}

/*
 * "sort({list})" function
 */
    static void
f_sort(typval_T *argvars, typval_T *rettv)
{
    do_sort_uniq(argvars, rettv, TRUE);
}

/*
 * "uniq({list})" function
 */
    static void
f_uniq(typval_T *argvars, typval_T *rettv)
{
    do_sort_uniq(argvars, rettv, FALSE);
}

/*
 * "soundfold({word})" function
 */
    static void
f_soundfold(typval_T *argvars, typval_T *rettv)
{
    char_u      *s;

    rettv->v_type = VAR_STRING;
    s = get_tv_string(&argvars[0]);
#ifdef FEAT_SPELL
    rettv->vval.v_string = eval_soundfold(s);
#else
    rettv->vval.v_string = vim_strsave(s);
#endif
}

/*
 * "spellbadword()" function
 */
    static void
f_spellbadword(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u      *word = (char_u *)"";
    hlf_T       attr = HLF_COUNT;
    int         len = 0;

    if (rettv_list_alloc(rettv) == FAIL)
        return;

#ifdef FEAT_SPELL
    if (argvars[0].v_type == VAR_UNKNOWN)
    {
        /* Find the start and length of the badly spelled word. */
        len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
        if (len != 0)
        {
            word = ml_get_cursor();
            curwin->w_set_curswant = TRUE;
        }
    }
    else if (curwin->w_p_spell && *curbuf->b_s.b_p_spl != NUL)
    {
        char_u  *str = get_tv_string_chk(&argvars[0]);
        int     capcol = -1;

        if (str != NULL)
        {
            /* Check the argument for spelling. */
            while (*str != NUL)
            {
                len = spell_check(curwin, str, &attr, &capcol, FALSE);
                if (attr != HLF_COUNT)
                {
                    word = str;
                    break;
                }
                str += len;
            }
        }
    }
#endif

    list_append_string(rettv->vval.v_list, word, len);
    list_append_string(rettv->vval.v_list, (char_u *)(
                        attr == HLF_SPB ? "bad" :
                        attr == HLF_SPR ? "rare" :
                        attr == HLF_SPL ? "local" :
                        attr == HLF_SPC ? "caps" :
                        ""), -1);
}

/*
 * "spellsuggest()" function
 */
    static void
f_spellsuggest(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_SPELL
    char_u      *str;
    int         typeerr = FALSE;
    int         maxcount;
    garray_T    ga;
    int         i;
    listitem_T  *li;
    int         need_capital = FALSE;
#endif

    if (rettv_list_alloc(rettv) == FAIL)
        return;

#ifdef FEAT_SPELL
    if (curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL)
    {
        str = get_tv_string(&argvars[0]);
        if (argvars[1].v_type != VAR_UNKNOWN)
        {
            maxcount = (int)get_tv_number_chk(&argvars[1], &typeerr);
            if (maxcount <= 0)
                return;
            if (argvars[2].v_type != VAR_UNKNOWN)
            {
                need_capital = (int)get_tv_number_chk(&argvars[2], &typeerr);
                if (typeerr)
                    return;
            }
        }
        else
            maxcount = 25;

        spell_suggest_list(&ga, str, maxcount, need_capital, FALSE);

        for (i = 0; i < ga.ga_len; ++i)
        {
            str = ((char_u **)ga.ga_data)[i];

            li = listitem_alloc();
            if (li == NULL)
                vim_free(str);
            else
            {
                li->li_tv.v_type = VAR_STRING;
                li->li_tv.v_lock = 0;
                li->li_tv.vval.v_string = str;
                list_append(rettv->vval.v_list, li);
            }
        }
        ga_clear(&ga);
    }
#endif
}

    static void
f_split(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    char_u      *end;
    char_u      *pat = NULL;
    regmatch_T  regmatch;
    char_u      patbuf[NUMBUFLEN];
    char_u      *save_cpo;
    int         match;
    colnr_T     col = 0;
    int         keepempty = FALSE;
    int         typeerr = FALSE;

    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
    save_cpo = p_cpo;
    p_cpo = (char_u *)"";

    str = get_tv_string(&argvars[0]);
    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        pat = get_tv_string_buf_chk(&argvars[1], patbuf);
        if (pat == NULL)
            typeerr = TRUE;
        if (argvars[2].v_type != VAR_UNKNOWN)
            keepempty = (int)get_tv_number_chk(&argvars[2], &typeerr);
    }
    if (pat == NULL || *pat == NUL)
        pat = (char_u *)"[\\x01- ]\\+";

    if (rettv_list_alloc(rettv) == FAIL)
        return;
    if (typeerr)
        return;

    regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
    if (regmatch.regprog != NULL)
    {
        regmatch.rm_ic = FALSE;
        while (*str != NUL || keepempty)
        {
            if (*str == NUL)
                match = FALSE;  /* empty item at the end */
            else
                match = vim_regexec_nl(&regmatch, str, col);
            if (match)
                end = regmatch.startp[0];
            else
                end = str + STRLEN(str);
            if (keepempty || end > str || (rettv->vval.v_list->lv_len > 0
                           && *str != NUL && match && end < regmatch.endp[0]))
            {
                if (list_append_string(rettv->vval.v_list, str,
                                                    (int)(end - str)) == FAIL)
                    break;
            }
            if (!match)
                break;
            /* Advance to just after the match. */
            if (regmatch.endp[0] > str)
                col = 0;
            else
            {
                /* Don't get stuck at the same match. */
#ifdef FEAT_MBYTE
                col = (*mb_ptr2len)(regmatch.endp[0]);
#else
                col = 1;
#endif
            }
            str = regmatch.endp[0];
        }

        vim_regfree(regmatch.regprog);
    }

    p_cpo = save_cpo;
}

#ifdef FEAT_FLOAT
/*
 * "sqrt()" function
 */
    static void
f_sqrt(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = sqrt(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "str2float()" function
 */
    static void
f_str2float(typval_T *argvars, typval_T *rettv)
{
    char_u *p = skipwhite(get_tv_string(&argvars[0]));
    int     isneg = (*p == '-');

    if (*p == '+' || *p == '-')
        p = skipwhite(p + 1);
    (void)string2float(p, &rettv->vval.v_float);
    if (isneg)
        rettv->vval.v_float *= -1;
    rettv->v_type = VAR_FLOAT;
}
#endif

/*
 * "str2nr()" function
 */
    static void
f_str2nr(typval_T *argvars, typval_T *rettv)
{
    int         base = 10;
    char_u      *p;
    varnumber_T n;
    int         what;
    int         isneg;

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        base = (int)get_tv_number(&argvars[1]);
        if (base != 2 && base != 8 && base != 10 && base != 16)
        {
            EMSG(_(e_invarg));
            return;
        }
    }

    p = skipwhite(get_tv_string(&argvars[0]));
    isneg = (*p == '-');
    if (*p == '+' || *p == '-')
        p = skipwhite(p + 1);
    switch (base)
    {
        case 2: what = STR2NR_BIN + STR2NR_FORCE; break;
        case 8: what = STR2NR_OCT + STR2NR_FORCE; break;
        case 16: what = STR2NR_HEX + STR2NR_FORCE; break;
        default: what = 0;
    }
    vim_str2nr(p, NULL, NULL, what, &n, NULL, 0);
    if (isneg)
        rettv->vval.v_number = -n;
    else
        rettv->vval.v_number = n;

}

#ifdef HAVE_STRFTIME
/*
 * "strftime({format}[, {time}])" function
 */
    static void
f_strftime(typval_T *argvars, typval_T *rettv)
{
    char_u      result_buf[256];
    struct tm   *curtime;
    time_t      seconds;
    char_u      *p;

    rettv->v_type = VAR_STRING;

    p = get_tv_string(&argvars[0]);
    if (argvars[1].v_type == VAR_UNKNOWN)
        seconds = time(NULL);
    else
        seconds = (time_t)get_tv_number(&argvars[1]);
    curtime = localtime(&seconds);
    /* MSVC returns NULL for an invalid value of seconds. */
    if (curtime == NULL)
        rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
    else
    {
# ifdef FEAT_MBYTE
        vimconv_T   conv;
        char_u      *enc;

        conv.vc_type = CONV_NONE;
        enc = enc_locale();
        convert_setup(&conv, p_enc, enc);
        if (conv.vc_type != CONV_NONE)
            p = string_convert(&conv, p, NULL);
# endif
        if (p != NULL)
            (void)strftime((char *)result_buf, sizeof(result_buf),
                                                          (char *)p, curtime);
        else
            result_buf[0] = NUL;

# ifdef FEAT_MBYTE
        if (conv.vc_type != CONV_NONE)
            vim_free(p);
        convert_setup(&conv, enc, p_enc);
        if (conv.vc_type != CONV_NONE)
            rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
        else
# endif
            rettv->vval.v_string = vim_strsave(result_buf);

# ifdef FEAT_MBYTE
        /* Release conversion descriptors */
        convert_setup(&conv, NULL, NULL);
        vim_free(enc);
# endif
    }
}
#endif

/*
 * "strgetchar()" function
 */
    static void
f_strgetchar(typval_T *argvars, typval_T *rettv)
{
    char_u      *str;
    int         len;
    int         error = FALSE;
    int         charidx;

    rettv->vval.v_number = -1;
    str = get_tv_string_chk(&argvars[0]);
    if (str == NULL)
        return;
    len = (int)STRLEN(str);
    charidx = (int)get_tv_number_chk(&argvars[1], &error);
    if (error)
        return;
#ifdef FEAT_MBYTE
    {
        int     byteidx = 0;

        while (charidx >= 0 && byteidx < len)
        {
            if (charidx == 0)
            {
                rettv->vval.v_number = mb_ptr2char(str + byteidx);
                break;
            }
            --charidx;
            byteidx += MB_CPTR2LEN(str + byteidx);
        }
    }
#else
    if (charidx < len)
        rettv->vval.v_number = str[charidx];
#endif
}

/*
 * "stridx()" function
 */
    static void
f_stridx(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];
    char_u      *needle;
    char_u      *haystack;
    char_u      *save_haystack;
    char_u      *pos;
    int         start_idx;

    needle = get_tv_string_chk(&argvars[1]);
    save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
    rettv->vval.v_number = -1;
    if (needle == NULL || haystack == NULL)
        return;         /* type error; errmsg already given */

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        int         error = FALSE;

        start_idx = (int)get_tv_number_chk(&argvars[2], &error);
        if (error || start_idx >= (int)STRLEN(haystack))
            return;
        if (start_idx >= 0)
            haystack += start_idx;
    }

    pos = (char_u *)strstr((char *)haystack, (char *)needle);
    if (pos != NULL)
        rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
}

/*
 * "string()" function
 */
    static void
f_string(typval_T *argvars, typval_T *rettv)
{
    char_u      *tofree;
    char_u      numbuf[NUMBUFLEN];

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf,
                                                                get_copyID());
    /* Make a copy if we have a value but it's not in allocated memory. */
    if (rettv->vval.v_string != NULL && tofree == NULL)
        rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
}

/*
 * "strlen()" function
 */
    static void
f_strlen(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = (varnumber_T)(STRLEN(
                                              get_tv_string(&argvars[0])));
}

/*
 * "strchars()" function
 */
    static void
f_strchars(typval_T *argvars, typval_T *rettv)
{
    char_u              *s = get_tv_string(&argvars[0]);
    int                 skipcc = 0;
#ifdef FEAT_MBYTE
    varnumber_T         len = 0;
    int                 (*func_mb_ptr2char_adv)(char_u **pp);
#endif

    if (argvars[1].v_type != VAR_UNKNOWN)
        skipcc = (int)get_tv_number_chk(&argvars[1], NULL);
    if (skipcc < 0 || skipcc > 1)
        EMSG(_(e_invarg));
    else
    {
#ifdef FEAT_MBYTE
        func_mb_ptr2char_adv = skipcc ? mb_ptr2char_adv : mb_cptr2char_adv;
        while (*s != NUL)
        {
            func_mb_ptr2char_adv(&s);
            ++len;
        }
        rettv->vval.v_number = len;
#else
        rettv->vval.v_number = (varnumber_T)(STRLEN(s));
#endif
    }
}

/*
 * "strdisplaywidth()" function
 */
    static void
f_strdisplaywidth(typval_T *argvars, typval_T *rettv)
{
    char_u      *s = get_tv_string(&argvars[0]);
    int         col = 0;

    if (argvars[1].v_type != VAR_UNKNOWN)
        col = (int)get_tv_number(&argvars[1]);

    rettv->vval.v_number = (varnumber_T)(linetabsize_col(col, s) - col);
}

/*
 * "strwidth()" function
 */
    static void
f_strwidth(typval_T *argvars, typval_T *rettv)
{
    char_u      *s = get_tv_string(&argvars[0]);

    rettv->vval.v_number = (varnumber_T)(
#ifdef FEAT_MBYTE
            mb_string2cells(s, -1)
#else
            STRLEN(s)
#endif
            );
}

/*
 * "strcharpart()" function
 */
    static void
f_strcharpart(typval_T *argvars, typval_T *rettv)
{
#ifdef FEAT_MBYTE
    char_u      *p;
    int         nchar;
    int         nbyte = 0;
    int         charlen;
    int         len = 0;
    int         slen;
    int         error = FALSE;

    p = get_tv_string(&argvars[0]);
    slen = (int)STRLEN(p);

    nchar = (int)get_tv_number_chk(&argvars[1], &error);
    if (!error)
    {
        if (nchar > 0)
            while (nchar > 0 && nbyte < slen)
            {
                nbyte += MB_CPTR2LEN(p + nbyte);
                --nchar;
            }
        else
            nbyte = nchar;
        if (argvars[2].v_type != VAR_UNKNOWN)
        {
            charlen = (int)get_tv_number(&argvars[2]);
            while (charlen > 0 && nbyte + len < slen)
            {
                int off = nbyte + len;

                if (off < 0)
                    len += 1;
                else
                    len += MB_CPTR2LEN(p + off);
                --charlen;
            }
        }
        else
            len = slen - nbyte;    /* default: all bytes that are available. */
    }

    /*
     * Only return the overlap between the specified part and the actual
     * string.
     */
    if (nbyte < 0)
    {
        len += nbyte;
        nbyte = 0;
    }
    else if (nbyte > slen)
        nbyte = slen;
    if (len < 0)
        len = 0;
    else if (nbyte + len > slen)
        len = slen - nbyte;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_strnsave(p + nbyte, len);
#else
    f_strpart(argvars, rettv);
#endif
}

/*
 * "strpart()" function
 */
    static void
f_strpart(typval_T *argvars, typval_T *rettv)
{
    char_u      *p;
    int         n;
    int         len;
    int         slen;
    int         error = FALSE;

    p = get_tv_string(&argvars[0]);
    slen = (int)STRLEN(p);

    n = (int)get_tv_number_chk(&argvars[1], &error);
    if (error)
        len = 0;
    else if (argvars[2].v_type != VAR_UNKNOWN)
        len = (int)get_tv_number(&argvars[2]);
    else
        len = slen - n;     /* default len: all bytes that are available. */

    /*
     * Only return the overlap between the specified part and the actual
     * string.
     */
    if (n < 0)
    {
        len += n;
        n = 0;
    }
    else if (n > slen)
        n = slen;
    if (len < 0)
        len = 0;
    else if (n + len > slen)
        len = slen - n;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_strnsave(p + n, len);
}

/*
 * "strridx()" function
 */
    static void
f_strridx(typval_T *argvars, typval_T *rettv)
{
    char_u      buf[NUMBUFLEN];
    char_u      *needle;
    char_u      *haystack;
    char_u      *rest;
    char_u      *lastmatch = NULL;
    int         haystack_len, end_idx;

    needle = get_tv_string_chk(&argvars[1]);
    haystack = get_tv_string_buf_chk(&argvars[0], buf);

    rettv->vval.v_number = -1;
    if (needle == NULL || haystack == NULL)
        return;         /* type error; errmsg already given */

    haystack_len = (int)STRLEN(haystack);
    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        /* Third argument: upper limit for index */
        end_idx = (int)get_tv_number_chk(&argvars[2], NULL);
        if (end_idx < 0)
            return;     /* can never find a match */
    }
    else
        end_idx = haystack_len;

    if (*needle == NUL)
    {
        /* Empty string matches past the end. */
        lastmatch = haystack + end_idx;
    }
    else
    {
        for (rest = haystack; *rest != '\0'; ++rest)
        {
            rest = (char_u *)strstr((char *)rest, (char *)needle);
            if (rest == NULL || rest > haystack + end_idx)
                break;
            lastmatch = rest;
        }
    }

    if (lastmatch == NULL)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
}

/*
 * "strtrans()" function
 */
    static void
f_strtrans(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
}

/*
 * "submatch()" function
 */
    static void
f_submatch(typval_T *argvars, typval_T *rettv)
{
    int         error = FALSE;
    int         no;
    int         retList = 0;

    no = (int)get_tv_number_chk(&argvars[0], &error);
    if (error)
        return;
    if (no < 0 || no >= NSUBEXP)
    {
        EMSGN(_("E935: invalid submatch number: %d"), no);
        return;
    }
    if (argvars[1].v_type != VAR_UNKNOWN)
        retList = (int)get_tv_number_chk(&argvars[1], &error);
    if (error)
        return;

    if (retList == 0)
    {
        rettv->v_type = VAR_STRING;
        rettv->vval.v_string = reg_submatch(no);
    }
    else
    {
        rettv->v_type = VAR_LIST;
        rettv->vval.v_list = reg_submatch_list(no);
    }
}

/*
 * "substitute()" function
 */
    static void
f_substitute(typval_T *argvars, typval_T *rettv)
{
    char_u      patbuf[NUMBUFLEN];
    char_u      subbuf[NUMBUFLEN];
    char_u      flagsbuf[NUMBUFLEN];

    char_u      *str = get_tv_string_chk(&argvars[0]);
    char_u      *pat = get_tv_string_buf_chk(&argvars[1], patbuf);
    char_u      *sub = NULL;
    typval_T    *expr = NULL;
    char_u      *flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);

    if (argvars[2].v_type == VAR_FUNC || argvars[2].v_type == VAR_PARTIAL)
        expr = &argvars[2];
    else
        sub = get_tv_string_buf_chk(&argvars[2], subbuf);

    rettv->v_type = VAR_STRING;
    if (str == NULL || pat == NULL || (sub == NULL && expr == NULL)
                                                                || flg == NULL)
        rettv->vval.v_string = NULL;
    else
        rettv->vval.v_string = do_string_sub(str, pat, sub, expr, flg);
}

/*
 * "synID(lnum, col, trans)" function
 */
    static void
f_synID(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         id = 0;
#ifdef FEAT_SYN_HL
    linenr_T    lnum;
    colnr_T     col;
    int         trans;
    int         transerr = FALSE;

    lnum = get_tv_lnum(argvars);                /* -1 on type error */
    col = (linenr_T)get_tv_number(&argvars[1]) - 1;     /* -1 on type error */
    trans = (int)get_tv_number_chk(&argvars[2], &transerr);

    if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
            && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
        id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL, FALSE);
#endif

    rettv->vval.v_number = id;
}

/*
 * "synIDattr(id, what [, mode])" function
 */
    static void
f_synIDattr(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u      *p = NULL;
#ifdef FEAT_SYN_HL
    int         id;
    char_u      *what;
    char_u      *mode;
    char_u      modebuf[NUMBUFLEN];
    int         modec;

    id = (int)get_tv_number(&argvars[0]);
    what = get_tv_string(&argvars[1]);
    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        mode = get_tv_string_buf(&argvars[2], modebuf);
        modec = TOLOWER_ASC(mode[0]);
        if (modec != 't' && modec != 'c' && modec != 'g')
            modec = 0;  /* replace invalid with current */
    }
    else
    {
#if defined(FEAT_GUI) || defined(FEAT_TERMGUICOLORS)
        if (USE_24BIT)
            modec = 'g';
        else
#endif
            if (t_colors > 1)
            modec = 'c';
        else
            modec = 't';
    }


    switch (TOLOWER_ASC(what[0]))
    {
        case 'b':
                if (TOLOWER_ASC(what[1]) == 'g')        /* bg[#] */
                    p = highlight_color(id, what, modec);
                else                                    /* bold */
                    p = highlight_has_attr(id, HL_BOLD, modec);
                break;

        case 'f':                                       /* fg[#] or font */
                p = highlight_color(id, what, modec);
                break;

        case 'i':
                if (TOLOWER_ASC(what[1]) == 'n')        /* inverse */
                    p = highlight_has_attr(id, HL_INVERSE, modec);
                else                                    /* italic */
                    p = highlight_has_attr(id, HL_ITALIC, modec);
                break;

        case 'n':                                       /* name */
                p = get_highlight_name_ext(NULL, id - 1, FALSE);
                break;

        case 'r':                                       /* reverse */
                p = highlight_has_attr(id, HL_INVERSE, modec);
                break;

        case 's':
                if (TOLOWER_ASC(what[1]) == 'p')        /* sp[#] */
                    p = highlight_color(id, what, modec);
                                                        /* strikeout */
                else if (TOLOWER_ASC(what[1]) == 't' &&
                        TOLOWER_ASC(what[2]) == 'r')
                    p = highlight_has_attr(id, HL_STRIKETHROUGH, modec);
                else                                    /* standout */
                    p = highlight_has_attr(id, HL_STANDOUT, modec);
                break;

        case 'u':
                if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
                                                        /* underline */
                    p = highlight_has_attr(id, HL_UNDERLINE, modec);
                else
                                                        /* undercurl */
                    p = highlight_has_attr(id, HL_UNDERCURL, modec);
                break;
    }

    if (p != NULL)
        p = vim_strsave(p);
#endif
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = p;
}

/*
 * "synIDtrans(id)" function
 */
    static void
f_synIDtrans(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         id;

#ifdef FEAT_SYN_HL
    id = (int)get_tv_number(&argvars[0]);

    if (id > 0)
        id = syn_get_final_id(id);
    else
#endif
        id = 0;

    rettv->vval.v_number = id;
}

/*
 * "synconcealed(lnum, col)" function
 */
    static void
f_synconcealed(typval_T *argvars UNUSED, typval_T *rettv)
{
#if defined(FEAT_SYN_HL) && defined(FEAT_CONCEAL)
    linenr_T    lnum;
    colnr_T     col;
    int         syntax_flags = 0;
    int         cchar;
    int         matchid = 0;
    char_u      str[NUMBUFLEN];
#endif

    rettv_list_set(rettv, NULL);

#if defined(FEAT_SYN_HL) && defined(FEAT_CONCEAL)
    lnum = get_tv_lnum(argvars);                /* -1 on type error */
    col = (colnr_T)get_tv_number(&argvars[1]) - 1;      /* -1 on type error */

    vim_memset(str, NUL, sizeof(str));

    if (rettv_list_alloc(rettv) != FAIL)
    {
        if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
            && col >= 0 && col <= (long)STRLEN(ml_get(lnum))
            && curwin->w_p_cole > 0)
        {
            (void)syn_get_id(curwin, lnum, col, FALSE, NULL, FALSE);
            syntax_flags = get_syntax_info(&matchid);

            /* get the conceal character */
            if ((syntax_flags & HL_CONCEAL) && curwin->w_p_cole < 3)
            {
                cchar = syn_get_sub_char();
                if (cchar == NUL && curwin->w_p_cole == 1)
                    cchar = (lcs_conceal == NUL) ? ' ' : lcs_conceal;
                if (cchar != NUL)
                {
# ifdef FEAT_MBYTE
                    if (has_mbyte)
                        (*mb_char2bytes)(cchar, str);
                    else
# endif
                        str[0] = cchar;
                }
            }
        }

        list_append_number(rettv->vval.v_list,
                                            (syntax_flags & HL_CONCEAL) != 0);
        /* -1 to auto-determine strlen */
        list_append_string(rettv->vval.v_list, str, -1);
        list_append_number(rettv->vval.v_list, matchid);
    }
#endif
}

/*
 * "synstack(lnum, col)" function
 */
    static void
f_synstack(typval_T *argvars UNUSED, typval_T *rettv)
{
#ifdef FEAT_SYN_HL
    linenr_T    lnum;
    colnr_T     col;
    int         i;
    int         id;
#endif

    rettv_list_set(rettv, NULL);

#ifdef FEAT_SYN_HL
    lnum = get_tv_lnum(argvars);                /* -1 on type error */
    col = (colnr_T)get_tv_number(&argvars[1]) - 1;      /* -1 on type error */

    if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
            && col >= 0 && col <= (long)STRLEN(ml_get(lnum))
            && rettv_list_alloc(rettv) != FAIL)
    {
        (void)syn_get_id(curwin, lnum, (colnr_T)col, FALSE, NULL, TRUE);
        for (i = 0; ; ++i)
        {
            id = syn_get_stack_item(i);
            if (id < 0)
                break;
            if (list_append_number(rettv->vval.v_list, id) == FAIL)
                break;
        }
    }
#endif
}

    static void
get_cmd_output_as_rettv(
    typval_T    *argvars,
    typval_T    *rettv,
    int         retlist)
{
    char_u      *res = NULL;
    char_u      *p;
    char_u      *infile = NULL;
    int         err = FALSE;
    FILE        *fd;
    list_T      *list = NULL;
    int         flags = SHELL_SILENT;

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
    if (check_restricted() || check_secure())
        goto errret;

    if (argvars[1].v_type != VAR_UNKNOWN)
    {
        /*
         * Write the text to a temp file, to be used for input of the shell
         * command.
         */
        if ((infile = vim_tempname('i', TRUE)) == NULL)
        {
            EMSG(_(e_notmp));
            goto errret;
        }

        fd = mch_fopen((char *)infile, WRITEBIN);
        if (fd == NULL)
        {
            EMSG2(_(e_notopen), infile);
            goto errret;
        }
        if (argvars[1].v_type == VAR_NUMBER)
        {
            linenr_T    lnum;
            buf_T       *buf;

            buf = buflist_findnr(argvars[1].vval.v_number);
            if (buf == NULL)
            {
                EMSGN(_(e_nobufnr), argvars[1].vval.v_number);
                fclose(fd);
                goto errret;
            }

            for (lnum = 1; lnum <= buf->b_ml.ml_line_count; lnum++)
            {
                for (p = ml_get_buf(buf, lnum, FALSE); *p != NUL; ++p)
                    if (putc(*p == '\n' ? NUL : *p, fd) == EOF)
                    {
                        err = TRUE;
                        break;
                    }
                if (putc(NL, fd) == EOF)
                {
                    err = TRUE;
                    break;
                }
            }
        }
        else if (argvars[1].v_type == VAR_LIST)
        {
            if (write_list(fd, argvars[1].vval.v_list, TRUE) == FAIL)
                err = TRUE;
        }
        else
        {
            size_t      len;
            char_u      buf[NUMBUFLEN];

            p = get_tv_string_buf_chk(&argvars[1], buf);
            if (p == NULL)
            {
                fclose(fd);
                goto errret;            /* type error; errmsg already given */
            }
            len = STRLEN(p);
            if (len > 0 && fwrite(p, len, 1, fd) != 1)
                err = TRUE;
        }
        if (fclose(fd) != 0)
            err = TRUE;
        if (err)
        {
            EMSG(_("E677: Error writing temp file"));
            goto errret;
        }
    }

    /* Omit SHELL_COOKED when invoked with ":silent".  Avoids that the shell
     * echoes typeahead, that messes up the display. */
    if (!msg_silent)
        flags += SHELL_COOKED;

    if (retlist)
    {
        int             len;
        listitem_T      *li;
        char_u          *s = NULL;
        char_u          *start;
        char_u          *end;
        int             i;

        res = get_cmd_output(get_tv_string(&argvars[0]), infile, flags, &len);
        if (res == NULL)
            goto errret;

        list = list_alloc();
        if (list == NULL)
            goto errret;

        for (i = 0; i < len; ++i)
        {
            start = res + i;
            while (i < len && res[i] != NL)
                ++i;
            end = res + i;

            s = alloc((unsigned)(end - start + 1));
            if (s == NULL)
                goto errret;

            for (p = s; start < end; ++p, ++start)
                *p = *start == NUL ? NL : *start;
            *p = NUL;

            li = listitem_alloc();
            if (li == NULL)
            {
                vim_free(s);
                goto errret;
            }
            li->li_tv.v_type = VAR_STRING;
            li->li_tv.v_lock = 0;
            li->li_tv.vval.v_string = s;
            list_append(list, li);
        }

        rettv_list_set(rettv, list);
        list = NULL;
    }
    else
    {
        res = get_cmd_output(get_tv_string(&argvars[0]), infile, flags, NULL);
#ifdef USE_CR
        /* translate <CR> into <NL> */
        if (res != NULL)
        {
            char_u      *s;

            for (s = res; *s; ++s)
            {
                if (*s == CAR)
                    *s = NL;
            }
        }
#else
# ifdef USE_CRNL
        /* translate <CR><NL> into <NL> */
        if (res != NULL)
        {
            char_u      *s, *d;

            d = res;
            for (s = res; *s; ++s)
            {
                if (s[0] == CAR && s[1] == NL)
                    ++s;
                *d++ = *s;
            }
            *d = NUL;
        }
# endif
#endif
        rettv->vval.v_string = res;
        res = NULL;
    }

errret:
    if (infile != NULL)
    {
        mch_remove(infile);
        vim_free(infile);
    }
    if (res != NULL)
        vim_free(res);
    if (list != NULL)
        list_free(list);
}

/*
 * "system()" function
 */
    static void
f_system(typval_T *argvars, typval_T *rettv)
{
    get_cmd_output_as_rettv(argvars, rettv, FALSE);
}

/*
 * "systemlist()" function
 */
    static void
f_systemlist(typval_T *argvars, typval_T *rettv)
{
    get_cmd_output_as_rettv(argvars, rettv, TRUE);
}

/*
 * "tabpagebuflist()" function
 */
    static void
f_tabpagebuflist(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
    tabpage_T   *tp;
    win_T       *wp = NULL;

    if (argvars[0].v_type == VAR_UNKNOWN)
        wp = firstwin;
    else
    {
        tp = find_tabpage((int)get_tv_number(&argvars[0]));
        if (tp != NULL)
            wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
    }
    if (wp != NULL && rettv_list_alloc(rettv) != FAIL)
    {
        for (; wp != NULL; wp = wp->w_next)
            if (list_append_number(rettv->vval.v_list,
                                                wp->w_buffer->b_fnum) == FAIL)
                break;
    }
}


/*
 * "tabpagenr()" function
 */
    static void
f_tabpagenr(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         nr = 1;
    char_u      *arg;

    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        arg = get_tv_string_chk(&argvars[0]);
        nr = 0;
        if (arg != NULL)
        {
            if (STRCMP(arg, "$") == 0)
                nr = tabpage_index(NULL) - 1;
            else
                EMSG2(_(e_invexpr2), arg);
        }
    }
    else
        nr = tabpage_index(curtab);
    rettv->vval.v_number = nr;
}


static int get_winnr(tabpage_T *tp, typval_T *argvar);

/*
 * Common code for tabpagewinnr() and winnr().
 */
    static int
get_winnr(tabpage_T *tp, typval_T *argvar)
{
    win_T       *twin;
    int         nr = 1;
    win_T       *wp;
    char_u      *arg;

    twin = (tp == curtab) ? curwin : tp->tp_curwin;
    if (argvar->v_type != VAR_UNKNOWN)
    {
        arg = get_tv_string_chk(argvar);
        if (arg == NULL)
            nr = 0;             /* type error; errmsg already given */
        else if (STRCMP(arg, "$") == 0)
            twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
        else if (STRCMP(arg, "#") == 0)
        {
            twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
            if (twin == NULL)
                nr = 0;
        }
        else
        {
            EMSG2(_(e_invexpr2), arg);
            nr = 0;
        }
    }

    if (nr > 0)
        for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
                                              wp != twin; wp = wp->w_next)
        {
            if (wp == NULL)
            {
                /* didn't find it in this tabpage */
                nr = 0;
                break;
            }
            ++nr;
        }
    return nr;
}

/*
 * "tabpagewinnr()" function
 */
    static void
f_tabpagewinnr(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         nr = 1;
    tabpage_T   *tp;

    tp = find_tabpage((int)get_tv_number(&argvars[0]));
    if (tp == NULL)
        nr = 0;
    else
        nr = get_winnr(tp, &argvars[1]);
    rettv->vval.v_number = nr;
}


/*
 * "tagfiles()" function
 */
    static void
f_tagfiles(typval_T *argvars UNUSED, typval_T *rettv)
{
    char_u      *fname;
    tagname_T   tn;
    int         first;

    if (rettv_list_alloc(rettv) == FAIL)
        return;
    fname = alloc(MAXPATHL);
    if (fname == NULL)
        return;

    for (first = TRUE; ; first = FALSE)
        if (get_tagfname(&tn, first, fname) == FAIL
                || list_append_string(rettv->vval.v_list, fname, -1) == FAIL)
            break;
    tagname_free(&tn);
    vim_free(fname);
}

/*
 * "taglist()" function
 */
    static void
f_taglist(typval_T *argvars, typval_T *rettv)
{
    char_u  *fname = NULL;
    char_u  *tag_pattern;

    tag_pattern = get_tv_string(&argvars[0]);

    rettv->vval.v_number = FALSE;
    if (*tag_pattern == NUL)
        return;

    if (argvars[1].v_type != VAR_UNKNOWN)
        fname = get_tv_string(&argvars[1]);
    if (rettv_list_alloc(rettv) == OK)
        (void)get_tags(rettv->vval.v_list, tag_pattern, fname);
}

/*
 * "tempname()" function
 */
    static void
f_tempname(typval_T *argvars UNUSED, typval_T *rettv)
{
    static int  x = 'A';

    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = vim_tempname(x, FALSE);

    /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
     * names.  Skip 'I' and 'O', they are used for shell redirection. */
    do
    {
        if (x == 'Z')
            x = '0';
        else if (x == '9')
            x = 'A';
        else
        {
#ifdef EBCDIC
            if (x == 'I')
                x = 'J';
            else if (x == 'R')
                x = 'S';
            else
#endif
                ++x;
        }
    } while (x == 'I' || x == 'O');
}

#ifdef FEAT_FLOAT
/*
 * "tan()" function
 */
    static void
f_tan(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = tan(f);
    else
        rettv->vval.v_float = 0.0;
}

/*
 * "tanh()" function
 */
    static void
f_tanh(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        rettv->vval.v_float = tanh(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "test_alloc_fail(id, countdown, repeat)" function
 */
    static void
f_test_alloc_fail(typval_T *argvars, typval_T *rettv UNUSED)
{
    if (argvars[0].v_type != VAR_NUMBER
            || argvars[0].vval.v_number <= 0
            || argvars[1].v_type != VAR_NUMBER
            || argvars[1].vval.v_number < 0
            || argvars[2].v_type != VAR_NUMBER)
        EMSG(_(e_invarg));
    else
    {
        alloc_fail_id = argvars[0].vval.v_number;
        if (alloc_fail_id >= aid_last)
            EMSG(_(e_invarg));
        alloc_fail_countdown = argvars[1].vval.v_number;
        alloc_fail_repeat = argvars[2].vval.v_number;
        did_outofmem_msg = FALSE;
    }
}

/*
 * "test_autochdir()"
 */
    static void
f_test_autochdir(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#if defined(FEAT_AUTOCHDIR)
    test_autochdir = TRUE;
#endif
}

/*
 * "test_feedinput()"
 */
    static void
f_test_feedinput(typval_T *argvars, typval_T *rettv UNUSED)
{
#ifdef USE_INPUT_BUF
    char_u      *val = get_tv_string_chk(&argvars[0]);

    if (val != NULL)
    {
        trash_input_buf();
        add_to_input_buf_csi(val, (int)STRLEN(val));
    }
#endif
}

/*
 * "test_disable({name}, {val})" function
 */
    static void
f_test_override(typval_T *argvars, typval_T *rettv UNUSED)
{
    char_u *name = (char_u *)"";
    int     val;
    static int save_starting = -1;

    if (argvars[0].v_type != VAR_STRING
            || (argvars[1].v_type) != VAR_NUMBER)
        EMSG(_(e_invarg));
    else
    {
        name = get_tv_string_chk(&argvars[0]);
        val = (int)get_tv_number(&argvars[1]);

        if (STRCMP(name, (char_u *)"redraw") == 0)
            disable_redraw_for_testing = val;
        else if (STRCMP(name, (char_u *)"char_avail") == 0)
            disable_char_avail_for_testing = val;
        else if (STRCMP(name, (char_u *)"starting") == 0)
        {
            if (val)
            {
                if (save_starting < 0)
                    save_starting = starting;
                starting = 0;
            }
            else
            {
                starting = save_starting;
                save_starting = -1;
            }
        }
        else if (STRCMP(name, (char_u *)"ALL") == 0)
        {
            disable_char_avail_for_testing = FALSE;
            disable_redraw_for_testing = FALSE;
            if (save_starting >= 0)
            {
                starting = save_starting;
                save_starting = -1;
            }
        }
        else
            EMSG2(_(e_invarg2), name);
    }
}

/*
 * "test_garbagecollect_now()" function
 */
    static void
f_test_garbagecollect_now(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
    /* This is dangerous, any Lists and Dicts used internally may be freed
     * while still in use. */
    garbage_collect(TRUE);
}

/*
 * "test_ignore_error()" function
 */
    static void
f_test_ignore_error(typval_T *argvars, typval_T *rettv UNUSED)
{
     ignore_error_for_testing(get_tv_string(&argvars[0]));
}

#ifdef FEAT_JOB_CHANNEL
    static void
f_test_null_channel(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_CHANNEL;
    rettv->vval.v_channel = NULL;
}
#endif

    static void
f_test_null_dict(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv_dict_set(rettv, NULL);
}

#ifdef FEAT_JOB_CHANNEL
    static void
f_test_null_job(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_JOB;
    rettv->vval.v_job = NULL;
}
#endif

    static void
f_test_null_list(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv_list_set(rettv, NULL);
}

    static void
f_test_null_partial(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_PARTIAL;
    rettv->vval.v_partial = NULL;
}

    static void
f_test_null_string(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
}

    static void
f_test_settime(typval_T *argvars, typval_T *rettv UNUSED)
{
    time_for_testing = (time_t)get_tv_number(&argvars[0]);
}

#if defined(FEAT_JOB_CHANNEL) || defined(FEAT_TIMERS) || defined(PROTO)
/*
 * Get a callback from "arg".  It can be a Funcref or a function name.
 * When "arg" is zero return an empty string.
 * Return NULL for an invalid argument.
 */
    char_u *
get_callback(typval_T *arg, partial_T **pp)
{
    if (arg->v_type == VAR_PARTIAL && arg->vval.v_partial != NULL)
    {
        *pp = arg->vval.v_partial;
        ++(*pp)->pt_refcount;
        return partial_name(*pp);
    }
    *pp = NULL;
    if (arg->v_type == VAR_FUNC || arg->v_type == VAR_STRING)
    {
        func_ref(arg->vval.v_string);
        return arg->vval.v_string;
    }
    if (arg->v_type == VAR_NUMBER && arg->vval.v_number == 0)
        return (char_u *)"";
    EMSG(_("E921: Invalid callback argument"));
    return NULL;
}

/*
 * Unref/free "callback" and "partial" returned by get_callback().
 */
    void
free_callback(char_u *callback, partial_T *partial)
{
    if (partial != NULL)
        partial_unref(partial);
    else if (callback != NULL)
    {
        func_unref(callback);
        vim_free(callback);
    }
}
#endif

#ifdef FEAT_TIMERS
/*
 * "timer_info([timer])" function
 */
    static void
f_timer_info(typval_T *argvars, typval_T *rettv)
{
    timer_T *timer = NULL;

    if (rettv_list_alloc(rettv) != OK)
        return;
    if (argvars[0].v_type != VAR_UNKNOWN)
    {
        if (argvars[0].v_type != VAR_NUMBER)
            EMSG(_(e_number_exp));
        else
        {
            timer = find_timer((int)get_tv_number(&argvars[0]));
            if (timer != NULL)
                add_timer_info(rettv, timer);
        }
    }
    else
        add_timer_info_all(rettv);
}

/*
 * "timer_pause(timer, paused)" function
 */
    static void
f_timer_pause(typval_T *argvars, typval_T *rettv UNUSED)
{
    timer_T     *timer = NULL;
    int         paused = (int)get_tv_number(&argvars[1]);

    if (argvars[0].v_type != VAR_NUMBER)
        EMSG(_(e_number_exp));
    else
    {
        timer = find_timer((int)get_tv_number(&argvars[0]));
        if (timer != NULL)
            timer->tr_paused = paused;
    }
}

/*
 * "timer_start(time, callback [, options])" function
 */
    static void
f_timer_start(typval_T *argvars, typval_T *rettv)
{
    long        msec = (long)get_tv_number(&argvars[0]);
    timer_T     *timer;
    int         repeat = 0;
    char_u      *callback;
    dict_T      *dict;
    partial_T   *partial;

    rettv->vval.v_number = -1;
    if (check_secure())
        return;
    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        if (argvars[2].v_type != VAR_DICT
                                   || (dict = argvars[2].vval.v_dict) == NULL)
        {
            EMSG2(_(e_invarg2), get_tv_string(&argvars[2]));
            return;
        }
        if (dict_find(dict, (char_u *)"repeat", -1) != NULL)
            repeat = get_dict_number(dict, (char_u *)"repeat");
    }

    callback = get_callback(&argvars[1], &partial);
    if (callback == NULL)
        return;

    timer = create_timer(msec, repeat);
    if (timer == NULL)
        free_callback(callback, partial);
    else
    {
        if (partial == NULL)
            timer->tr_callback = vim_strsave(callback);
        else
            /* pointer into the partial */
            timer->tr_callback = callback;
        timer->tr_partial = partial;
        rettv->vval.v_number = (varnumber_T)timer->tr_id;
    }
}

/*
 * "timer_stop(timer)" function
 */
    static void
f_timer_stop(typval_T *argvars, typval_T *rettv UNUSED)
{
    timer_T *timer;

    if (argvars[0].v_type != VAR_NUMBER)
    {
        EMSG(_(e_number_exp));
        return;
    }
    timer = find_timer((int)get_tv_number(&argvars[0]));
    if (timer != NULL)
        stop_timer(timer);
}

/*
 * "timer_stopall()" function
 */
    static void
f_timer_stopall(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
    stop_all_timers();
}
#endif

/*
 * "tolower(string)" function
 */
    static void
f_tolower(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = strlow_save(get_tv_string(&argvars[0]));
}

/*
 * "toupper(string)" function
 */
    static void
f_toupper(typval_T *argvars, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
}

/*
 * "tr(string, fromstr, tostr)" function
 */
    static void
f_tr(typval_T *argvars, typval_T *rettv)
{
    char_u      *in_str;
    char_u      *fromstr;
    char_u      *tostr;
    char_u      *p;
#ifdef FEAT_MBYTE
    int         inlen;
    int         fromlen;
    int         tolen;
    int         idx;
    char_u      *cpstr;
    int         cplen;
    int         first = TRUE;
#endif
    char_u      buf[NUMBUFLEN];
    char_u      buf2[NUMBUFLEN];
    garray_T    ga;

    in_str = get_tv_string(&argvars[0]);
    fromstr = get_tv_string_buf_chk(&argvars[1], buf);
    tostr = get_tv_string_buf_chk(&argvars[2], buf2);

    /* Default return value: empty string. */
    rettv->v_type = VAR_STRING;
    rettv->vval.v_string = NULL;
    if (fromstr == NULL || tostr == NULL)
            return;             /* type error; errmsg already given */
    ga_init2(&ga, (int)sizeof(char), 80);

#ifdef FEAT_MBYTE
    if (!has_mbyte)
#endif
        /* not multi-byte: fromstr and tostr must be the same length */
        if (STRLEN(fromstr) != STRLEN(tostr))
        {
#ifdef FEAT_MBYTE
error:
#endif
            EMSG2(_(e_invarg2), fromstr);
            ga_clear(&ga);
            return;
        }

    /* fromstr and tostr have to contain the same number of chars */
    while (*in_str != NUL)
    {
#ifdef FEAT_MBYTE
        if (has_mbyte)
        {
            inlen = (*mb_ptr2len)(in_str);
            cpstr = in_str;
            cplen = inlen;
            idx = 0;
            for (p = fromstr; *p != NUL; p += fromlen)
            {
                fromlen = (*mb_ptr2len)(p);
                if (fromlen == inlen && STRNCMP(in_str, p, inlen) == 0)
                {
                    for (p = tostr; *p != NUL; p += tolen)
                    {
                        tolen = (*mb_ptr2len)(p);
                        if (idx-- == 0)
                        {
                            cplen = tolen;
                            cpstr = p;
                            break;
                        }
                    }
                    if (*p == NUL)      /* tostr is shorter than fromstr */
                        goto error;
                    break;
                }
                ++idx;
            }

            if (first && cpstr == in_str)
            {
                /* Check that fromstr and tostr have the same number of
                 * (multi-byte) characters.  Done only once when a character
                 * of in_str doesn't appear in fromstr. */
                first = FALSE;
                for (p = tostr; *p != NUL; p += tolen)
                {
                    tolen = (*mb_ptr2len)(p);
                    --idx;
                }
                if (idx != 0)
                    goto error;
            }

            (void)ga_grow(&ga, cplen);
            mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
            ga.ga_len += cplen;

            in_str += inlen;
        }
        else
#endif
        {
            /* When not using multi-byte chars we can do it faster. */
            p = vim_strchr(fromstr, *in_str);
            if (p != NULL)
                ga_append(&ga, tostr[p - fromstr]);
            else
                ga_append(&ga, *in_str);
            ++in_str;
        }
    }

    /* add a terminating NUL */
    (void)ga_grow(&ga, 1);
    ga_append(&ga, NUL);

    rettv->vval.v_string = ga.ga_data;
}

/*
 * "trim({expr})" function
 */
    static void
f_trim(typval_T *argvars, typval_T *rettv)
{
    char_u      buf1[NUMBUFLEN];
    char_u      buf2[NUMBUFLEN];
    char_u      *head = get_tv_string_buf_chk(&argvars[0], buf1);
    char_u      *mask = NULL;
    char_u      *tail;
    char_u      *prev;
    char_u      *p;
    int         c1;

    rettv->v_type = VAR_STRING;
    if (head == NULL)
    {
        rettv->vval.v_string = NULL;
        return;
    }

    if (argvars[1].v_type == VAR_STRING)
        mask = get_tv_string_buf_chk(&argvars[1], buf2);

    while (*head != NUL)
    {
        c1 = PTR2CHAR(head);
        if (mask == NULL)
        {
            if (c1 > ' ' && c1 != 0xa0)
                break;
        }
        else
        {
            for (p = mask; *p != NUL; MB_PTR_ADV(p))
                if (c1 == PTR2CHAR(p))
                    break;
            if (*p == NUL)
                break;
        }
        MB_PTR_ADV(head);
    }

    for (tail = head + STRLEN(head); tail > head; tail = prev)
    {
        prev = tail;
        MB_PTR_BACK(head, prev);
        c1 = PTR2CHAR(prev);
        if (mask == NULL)
        {
            if (c1 > ' ' && c1 != 0xa0)
                break;
        }
        else
        {
            for (p = mask; *p != NUL; MB_PTR_ADV(p))
                if (c1 == PTR2CHAR(p))
                    break;
            if (*p == NUL)
                break;
        }
    }
    rettv->vval.v_string = vim_strnsave(head, (int)(tail - head));
}

#ifdef FEAT_FLOAT
/*
 * "trunc({float})" function
 */
    static void
f_trunc(typval_T *argvars, typval_T *rettv)
{
    float_T     f = 0.0;

    rettv->v_type = VAR_FLOAT;
    if (get_float_arg(argvars, &f) == OK)
        /* trunc() is not in C90, use floor() or ceil() instead. */
        rettv->vval.v_float = f > 0 ? floor(f) : ceil(f);
    else
        rettv->vval.v_float = 0.0;
}
#endif

/*
 * "type(expr)" function
 */
    static void
f_type(typval_T *argvars, typval_T *rettv)
{
    int n = -1;

    switch (argvars[0].v_type)
    {
        case VAR_NUMBER: n = VAR_TYPE_NUMBER; break;
        case VAR_STRING: n = VAR_TYPE_STRING; break;
        case VAR_PARTIAL:
        case VAR_FUNC:   n = VAR_TYPE_FUNC; break;
        case VAR_LIST:   n = VAR_TYPE_LIST; break;
        case VAR_DICT:   n = VAR_TYPE_DICT; break;
        case VAR_FLOAT:  n = VAR_TYPE_FLOAT; break;
        case VAR_SPECIAL:
             if (argvars[0].vval.v_number == VVAL_FALSE
                     || argvars[0].vval.v_number == VVAL_TRUE)
                 n = VAR_TYPE_BOOL;
             else
                 n = VAR_TYPE_NONE;
             break;
        case VAR_JOB:     n = VAR_TYPE_JOB; break;
        case VAR_CHANNEL: n = VAR_TYPE_CHANNEL; break;
        case VAR_UNKNOWN:
             internal_error("f_type(UNKNOWN)");
             n = -1;
             break;
    }
    rettv->vval.v_number = n;
}

/*
 * "undofile(name)" function
 */
    static void
f_undofile(typval_T *argvars UNUSED, typval_T *rettv)
{
    rettv->v_type = VAR_STRING;
#ifdef FEAT_PERSISTENT_UNDO
    {
        char_u *fname = get_tv_string(&argvars[0]);

        if (*fname == NUL)
        {
            /* If there is no file name there will be no undo file. */
            rettv->vval.v_string = NULL;
        }
        else
        {
            char_u *ffname = FullName_save(fname, FALSE);

            if (ffname != NULL)
                rettv->vval.v_string = u_get_undo_file_name(ffname, FALSE);
            vim_free(ffname);
        }
    }
#else
    rettv->vval.v_string = NULL;
#endif
}

/*
 * "undotree()" function
 */
    static void
f_undotree(typval_T *argvars UNUSED, typval_T *rettv)
{
    if (rettv_dict_alloc(rettv) == OK)
    {
        dict_T *dict = rettv->vval.v_dict;
        list_T *list;

        dict_add_nr_str(dict, "synced", (long)curbuf->b_u_synced, NULL);
        dict_add_nr_str(dict, "seq_last", curbuf->b_u_seq_last, NULL);
        dict_add_nr_str(dict, "save_last",
                                        (long)curbuf->b_u_save_nr_last, NULL);
        dict_add_nr_str(dict, "seq_cur", curbuf->b_u_seq_cur, NULL);
        dict_add_nr_str(dict, "time_cur", (long)curbuf->b_u_time_cur, NULL);
        dict_add_nr_str(dict, "save_cur", (long)curbuf->b_u_save_nr_cur, NULL);

        list = list_alloc();
        if (list != NULL)
        {
            u_eval_tree(curbuf->b_u_oldhead, list);
            dict_add_list(dict, "entries", list);
        }
    }
}

/*
 * "values(dict)" function
 */
    static void
f_values(typval_T *argvars, typval_T *rettv)
{
    dict_list(argvars, rettv, 1);
}

/*
 * "virtcol(string)" function
 */
    static void
f_virtcol(typval_T *argvars, typval_T *rettv)
{
    colnr_T     vcol = 0;
    pos_T       *fp;
    int         fnum = curbuf->b_fnum;

    fp = var2fpos(&argvars[0], FALSE, &fnum);
    if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count
                                                    && fnum == curbuf->b_fnum)
    {
        getvvcol(curwin, fp, NULL, NULL, &vcol);
        ++vcol;
    }

    rettv->vval.v_number = vcol;
}

/*
 * "visualmode()" function
 */
    static void
f_visualmode(typval_T *argvars, typval_T *rettv)
{
    char_u      str[2];

    rettv->v_type = VAR_STRING;
    str[0] = curbuf->b_visual_mode_eval;
    str[1] = NUL;
    rettv->vval.v_string = vim_strsave(str);

    /* A non-zero number or non-empty string argument: reset mode. */
    if (non_zero_arg(&argvars[0]))
        curbuf->b_visual_mode_eval = NUL;
}

/*
 * "wildmenumode()" function
 */
    static void
f_wildmenumode(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
#ifdef FEAT_WILDMENU
    if (wild_menu_showing)
        rettv->vval.v_number = 1;
#endif
}

/*
 * "winbufnr(nr)" function
 */
    static void
f_winbufnr(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp;

    wp = find_win_by_nr(&argvars[0], NULL);
    if (wp == NULL)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = wp->w_buffer->b_fnum;
}

/*
 * "wincol()" function
 */
    static void
f_wincol(typval_T *argvars UNUSED, typval_T *rettv)
{
    validate_cursor();
    rettv->vval.v_number = curwin->w_wcol + 1;
}

/*
 * "winheight(nr)" function
 */
    static void
f_winheight(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp;

    wp = find_win_by_nr(&argvars[0], NULL);
    if (wp == NULL)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = wp->w_height;
}

/*
 * "winline()" function
 */
    static void
f_winline(typval_T *argvars UNUSED, typval_T *rettv)
{
    validate_cursor();
    rettv->vval.v_number = curwin->w_wrow + 1;
}

/*
 * "winnr()" function
 */
    static void
f_winnr(typval_T *argvars UNUSED, typval_T *rettv)
{
    int         nr = 1;

    nr = get_winnr(curtab, &argvars[0]);
    rettv->vval.v_number = nr;
}

/*
 * "winrestcmd()" function
 */
    static void
f_winrestcmd(typval_T *argvars UNUSED, typval_T *rettv)
{
    win_T       *wp;
    int         winnr = 1;
    garray_T    ga;
    char_u      buf[50];

    ga_init2(&ga, (int)sizeof(char), 70);
    FOR_ALL_WINDOWS(wp)
    {
        sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
        ga_concat(&ga, buf);
        sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
        ga_concat(&ga, buf);
        ++winnr;
    }
    ga_append(&ga, NUL);

    rettv->vval.v_string = ga.ga_data;
    rettv->v_type = VAR_STRING;
}

/*
 * "winrestview()" function
 */
    static void
f_winrestview(typval_T *argvars, typval_T *rettv UNUSED)
{
    dict_T      *dict;

    if (argvars[0].v_type != VAR_DICT
            || (dict = argvars[0].vval.v_dict) == NULL)
        EMSG(_(e_invarg));
    else
    {
        if (dict_find(dict, (char_u *)"lnum", -1) != NULL)
            curwin->w_cursor.lnum = (linenr_T)get_dict_number(dict, (char_u *)"lnum");
        if (dict_find(dict, (char_u *)"col", -1) != NULL)
            curwin->w_cursor.col = (colnr_T)get_dict_number(dict, (char_u *)"col");
#ifdef FEAT_VIRTUALEDIT
        if (dict_find(dict, (char_u *)"coladd", -1) != NULL)
            curwin->w_cursor.coladd = (colnr_T)get_dict_number(dict, (char_u *)"coladd");
#endif
        if (dict_find(dict, (char_u *)"curswant", -1) != NULL)
        {
            curwin->w_curswant = (colnr_T)get_dict_number(dict, (char_u *)"curswant");
            curwin->w_set_curswant = FALSE;
        }

        if (dict_find(dict, (char_u *)"topline", -1) != NULL)
            set_topline(curwin, (linenr_T)get_dict_number(dict, (char_u *)"topline"));
#ifdef FEAT_DIFF
        if (dict_find(dict, (char_u *)"topfill", -1) != NULL)
            curwin->w_topfill = (int)get_dict_number(dict, (char_u *)"topfill");
#endif
        if (dict_find(dict, (char_u *)"leftcol", -1) != NULL)
            curwin->w_leftcol = (colnr_T)get_dict_number(dict, (char_u *)"leftcol");
        if (dict_find(dict, (char_u *)"skipcol", -1) != NULL)
            curwin->w_skipcol = (colnr_T)get_dict_number(dict, (char_u *)"skipcol");

        check_cursor();
        win_new_height(curwin, curwin->w_height);
        win_new_width(curwin, curwin->w_width);
        changed_window_setting();

        if (curwin->w_topline <= 0)
            curwin->w_topline = 1;
        if (curwin->w_topline > curbuf->b_ml.ml_line_count)
            curwin->w_topline = curbuf->b_ml.ml_line_count;
#ifdef FEAT_DIFF
        check_topfill(curwin, TRUE);
#endif
    }
}

/*
 * "winsaveview()" function
 */
    static void
f_winsaveview(typval_T *argvars UNUSED, typval_T *rettv)
{
    dict_T      *dict;

    if (rettv_dict_alloc(rettv) == FAIL)
        return;
    dict = rettv->vval.v_dict;

    dict_add_nr_str(dict, "lnum", (long)curwin->w_cursor.lnum, NULL);
    dict_add_nr_str(dict, "col", (long)curwin->w_cursor.col, NULL);
#ifdef FEAT_VIRTUALEDIT
    dict_add_nr_str(dict, "coladd", (long)curwin->w_cursor.coladd, NULL);
#endif
    update_curswant();
    dict_add_nr_str(dict, "curswant", (long)curwin->w_curswant, NULL);

    dict_add_nr_str(dict, "topline", (long)curwin->w_topline, NULL);
#ifdef FEAT_DIFF
    dict_add_nr_str(dict, "topfill", (long)curwin->w_topfill, NULL);
#endif
    dict_add_nr_str(dict, "leftcol", (long)curwin->w_leftcol, NULL);
    dict_add_nr_str(dict, "skipcol", (long)curwin->w_skipcol, NULL);
}

/*
 * "winwidth(nr)" function
 */
    static void
f_winwidth(typval_T *argvars, typval_T *rettv)
{
    win_T       *wp;

    wp = find_win_by_nr(&argvars[0], NULL);
    if (wp == NULL)
        rettv->vval.v_number = -1;
    else
        rettv->vval.v_number = wp->w_width;
}

/*
 * "wordcount()" function
 */
    static void
f_wordcount(typval_T *argvars UNUSED, typval_T *rettv)
{
    if (rettv_dict_alloc(rettv) == FAIL)
        return;
    cursor_pos_info(rettv->vval.v_dict);
}

/*
 * "writefile()" function
 */
    static void
f_writefile(typval_T *argvars, typval_T *rettv)
{
    int         binary = FALSE;
    int         append = FALSE;
#ifdef HAVE_FSYNC
    int         do_fsync = p_fs;
#endif
    char_u      *fname;
    FILE        *fd;
    int         ret = 0;
    listitem_T  *li;
    list_T      *list;

    rettv->vval.v_number = -1;
    if (check_restricted() || check_secure())
        return;

    if (argvars[0].v_type != VAR_LIST)
    {
        EMSG2(_(e_listarg), "writefile()");
        return;
    }
    list = argvars[0].vval.v_list;
    if (list == NULL)
        return;
    for (li = list->lv_first; li != NULL; li = li->li_next)
        if (get_tv_string_chk(&li->li_tv) == NULL)
            return;

    if (argvars[2].v_type != VAR_UNKNOWN)
    {
        char_u *arg2 = get_tv_string_chk(&argvars[2]);

        if (arg2 == NULL)
            return;
        if (vim_strchr(arg2, 'b') != NULL)
            binary = TRUE;
        if (vim_strchr(arg2, 'a') != NULL)
            append = TRUE;
#ifdef HAVE_FSYNC
        if (vim_strchr(arg2, 's') != NULL)
            do_fsync = TRUE;
        else if (vim_strchr(arg2, 'S') != NULL)
            do_fsync = FALSE;
#endif
    }

    fname = get_tv_string_chk(&argvars[1]);
    if (fname == NULL)
        return;

    /* Always open the file in binary mode, library functions have a mind of
     * their own about CR-LF conversion. */
    if (*fname == NUL || (fd = mch_fopen((char *)fname,
                                      append ? APPENDBIN : WRITEBIN)) == NULL)
    {
        EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
        ret = -1;
    }
    else
    {
        if (write_list(fd, list, binary) == FAIL)
            ret = -1;
#ifdef HAVE_FSYNC
        else if (do_fsync)
            /* Ignore the error, the user wouldn't know what to do about it.
             * May happen for a device. */
            ignored = fsync(fileno(fd));
#endif
        fclose(fd);
    }

    rettv->vval.v_number = ret;
}

/*
 * "xor(expr, expr)" function
 */
    static void
f_xor(typval_T *argvars, typval_T *rettv)
{
    rettv->vval.v_number = get_tv_number_chk(&argvars[0], NULL)
                                        ^ get_tv_number_chk(&argvars[1], NULL);
}


#endif /* FEAT_EVAL */