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/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
/**** arg-parse.c --- Command line argument parsing.
*
** Author: Steve Folkes <smf@hermes.mod.uk>
*
**** Commentary:
*
* This file implements the command line argument parsing routines specified
* in "arg-parse.h". See that file for more details.
*
**** Change Log:
* $Log: arg-parse.c,v $
* Revision 1.1.1.1 1998/01/17 15:57:16 release
* First version to be checked into rolling release.
*
* Revision 1.3 1994/12/12 11:44:26 smf
* Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
* OSSG C Coding Standards.
*
* Revision 1.2 1994/08/22 09:36:39 smf
* Fixed bug DR114:ids-too-long.
*
* Revision 1.1.1.1 1994/07/25 16:05:47 smf
* Initial import of library shared files.
*
**/
/****************************************************************************/
#include "arg-parse.h"
#include "gen-errors.h"
/*--------------------------------------------------------------------------*/
void
arg_parse_intern_descriptions PROTO_N ((arg_list))
PROTO_T (ArgListP arg_list)
{
while ((arg_list->name != NIL (CStringP)) ||
(arg_list->short_name != '\0')) {
EStringP estring = error_lookup_string (arg_list->u.name);
ASSERT (estring != NIL (EStringP));
arg_list->u.message = estring;
arg_list ++;
}
}
int
arg_parse_arguments PROTO_N ((arg_list, usage, argc, argv))
PROTO_T (ArgListP arg_list X
EStringP usage X
int argc X
char **argv)
{
int tmp_argc = argc;
char **tmp_argv = argv;
ArgUsageT closure;
closure.usage = error_string_contents (usage);
closure.arg_list = arg_list;
while (tmp_argc) {
CStringP option = (tmp_argv [0]);
char c = (option [0]);
if ((((c == '-') && (option [1] == '-')) ||
((c == '+') && (option [1] == '+'))) && (option [2] == '\0')) {
return (argc - tmp_argc + 1);
} else if (((c == '-') && (option [1] == '-')) ||
((c == '+') && (option [1] == '+'))) {
ArgListP tmp_list = arg_list;
ArgListP chosen = NIL (ArgListP);
unsigned matches = 0;
CStringP immediate = NIL (CStringP);
while ((tmp_list->name != NIL (CStringP)) ||
(tmp_list->short_name != '\0')) {
CStringP opt = (tmp_list->name);
CStringP arg = (&(option [2]));
if (opt != NIL (CStringP)) {
char optch;
char argch;
do {
optch = (*opt ++);
argch = (*arg ++);
} while (optch && argch && (optch == argch));
if (optch == argch) {
chosen = tmp_list;
matches = 1;
immediate = (arg - 1);
break;
} else if ((optch == '\0') &&
(((tmp_list->type) == AT_IMMEDIATE) ||
((tmp_list->type) == AT_EITHER))) {
chosen = tmp_list;
matches = 1;
immediate = (arg - 1);
break;
} else if (argch == '\0') {
chosen = tmp_list;
matches ++;
}
}
tmp_list ++;
}
if (matches == 0) {
E_arg_parse_unknown_option (option, &closure);
UNREACHED;
} else if (matches > 1) {
E_arg_parse_ambiguous_option (option, &closure);
UNREACHED;
} else {
switch (chosen->type) EXHAUSTIVE {
case AT_SWITCH:
(*((BoolP) (chosen->closure))) = (c == '-');
break;
case AT_NEG_SWITCH:
(*((BoolP) (chosen->closure))) = (c == '+');
break;
case AT_PROC_SWITCH:
(*(chosen->proc)) (option, &closure, chosen->closure,
c == '-');
break;
case AT_IMMEDIATE:
if (immediate != NIL (CStringP)) {
(*(chosen->proc)) (option, &closure, chosen->closure,
immediate);
} else {
E_arg_parse_unknown_option (option, &closure);
UNREACHED;
}
break;
case AT_EITHER:
if (immediate != NIL (CStringP)) {
if (immediate [0] != '\0') {
(*(chosen->proc)) (option, &closure,
chosen->closure, immediate);
} else if (tmp_argc > 1) {
tmp_argv ++;
tmp_argc --;
(*(chosen->proc)) (option, &closure,
chosen->closure, tmp_argv [0]);
} else {
E_arg_parse_missing_argument (option, &closure);
UNREACHED;
}
} else {
E_arg_parse_unknown_option (option, &closure);
UNREACHED;
}
break;
case AT_FOLLOWING:
if (tmp_argc > 1) {
tmp_argv ++;
tmp_argc --;
(*(chosen->proc)) (option, &closure, chosen->closure,
tmp_argv [0]);
} else {
E_arg_parse_missing_argument (option, &closure);
UNREACHED;
}
break;
case AT_EMPTY:
(*(chosen->proc)) (option, &closure, chosen->closure);
break;
case AT_FOLLOWING2:
if (tmp_argc > 2) {
tmp_argv += 2;
tmp_argc -= 2;
(*(chosen->proc)) (option, &closure, chosen->closure,
tmp_argv [-1], tmp_argv [0]);
} else {
E_arg_parse_missing_argument (option, &closure);
UNREACHED;
}
break;
case AT_FOLLOWING3:
if (tmp_argc > 3) {
tmp_argv += 3;
tmp_argc -= 3;
(*(chosen->proc)) (option, &closure, chosen->closure,
tmp_argv [-2], tmp_argv [-1],
tmp_argv [0]);
} else {
E_arg_parse_missing_argument (option, &closure);
UNREACHED;
}
break;
}
}
} else if (((c == '-') && (option [1] == '+')) ||
((c == '+') && (option [1] == '-')) ||
((c == '-') && (option [1] == '\0')) ||
((c == '+') && (option [1] == '\0'))) {
E_arg_parse_unknown_option (option, &closure);
UNREACHED;
} else if ((c == '-') || (c == '+')) {
CStringP opt = &(option [1]);
while ((opt != NIL (CStringP)) && (*opt != '\0')) {
ArgListP tmp_list = arg_list;
ArgListP chosen = NIL (ArgListP);
while ((tmp_list->name != NIL (CStringP)) ||
(tmp_list->short_name != '\0')) {
if (tmp_list->short_name == *opt) {
chosen = tmp_list;
break;
}
tmp_list ++;
}
if (chosen) {
switch (chosen->type) EXHAUSTIVE {
case AT_SWITCH:
(*((BoolP) (chosen->closure))) = (c == '-');
break;
case AT_NEG_SWITCH:
(*((BoolP) (chosen->closure))) = (c == '+');
break;
case AT_PROC_SWITCH:
(*(chosen->proc)) (opt, &closure, chosen->closure,
c == '-');
break;
case AT_IMMEDIATE:
(*(chosen->proc)) (opt, &closure, chosen->closure,
opt + 1);
opt = NIL (CStringP);
break;
case AT_EITHER:
if (opt [1] != '\0') {
(*(chosen->proc)) (opt, &closure, chosen->closure,
opt + 1);
} else if (tmp_argc > 1) {
tmp_argv ++;
tmp_argc --;
(*(chosen->proc)) (opt, &closure, chosen->closure,
tmp_argv [0]);
} else {
E_arg_parse_missing_short_arg (option, opt,
&closure);
UNREACHED;
}
opt = NIL (CStringP);
break;
case AT_FOLLOWING:
if (tmp_argc > 1) {
tmp_argv ++;
tmp_argc --;
(*(chosen->proc)) (opt, &closure, chosen->closure,
tmp_argv [0]);
} else {
E_arg_parse_missing_short_arg (option, opt,
&closure);
UNREACHED;
}
break;
case AT_EMPTY:
(*(chosen->proc)) (opt, &closure, chosen->closure);
break;
case AT_FOLLOWING2:
if (tmp_argc > 2) {
tmp_argv += 2;
tmp_argc -= 2;
(*(chosen->proc)) (opt, &closure, chosen->closure,
tmp_argv [-1], tmp_argv [0]);
} else {
E_arg_parse_missing_short_arg (option, opt,
&closure);
UNREACHED;
}
break;
case AT_FOLLOWING3:
if (tmp_argc > 3) {
tmp_argv += 3;
tmp_argc -= 3;
(*(chosen->proc)) (opt, &closure, chosen->closure,
tmp_argv [-2], tmp_argv [-1],
tmp_argv [0]);
} else {
E_arg_parse_missing_short_arg (option, opt,
&closure);
UNREACHED;
}
break;
}
} else {
E_arg_parse_unknown_short_opt (option, opt, &closure);
UNREACHED;
}
if (opt) {
opt ++;
}
}
} else {
return (argc - tmp_argc);
}
tmp_argv ++;
tmp_argc --;
}
return (argc);
}
void
write_arg_usage PROTO_N ((ostream, closure))
PROTO_T (OStreamP ostream X
ArgUsageP closure)
{
CStringP usage = (closure->usage);
ArgListP arg_list = (closure->arg_list);
write_cstring (ostream, usage);
while ((arg_list->name != NIL (CStringP)) ||
(arg_list->short_name != '\0')) {
CStringP desc = error_string_contents (arg_list->u.message);
if (arg_list->name) {
write_newline (ostream);
write_cstring (ostream, " {--|++}");
write_cstring (ostream, arg_list->name);
write_cstring (ostream, desc);
}
if (arg_list->short_name != '\0') {
write_newline (ostream);
write_cstring (ostream, " {-|+}");
write_char (ostream, arg_list->short_name);
write_cstring (ostream, desc);
}
arg_list ++;
}
}
/*
* Local variables(smf):
* eval: (include::add-path-entry "../os-interface" "../generated")
* end:
**/