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/*
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* Source input, lexer and parser
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*/
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/* $Id: lex.h,v 1.4 1994/05/31 13:34:34 michael Exp $ */
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#define IDENT 64
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typedef struct source Source;
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struct source {
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const char *str; /* input pointer */
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int type; /* input type */
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const char *start; /* start of current buffer */
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union {
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char **strv; /* string [] */
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struct shf *shf; /* shell file */
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struct tbl *tblp; /* alias (SALIAS) */
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char *freeme; /* also for SREREAD */
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} u;
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char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
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* alias (SALIAS) */
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int line; /* line number */
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int errline; /* line the error occured on (0 if not set) */
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const char *file; /* input file name */
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int flags; /* SF_* */
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Area *areap;
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XString xs; /* input buffer */
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Source *next; /* stacked source */
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};
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/* Source.type values */
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#define SEOF 0 /* input EOF */
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#define SFILE 1 /* file input */
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#define SSTDIN 2 /* read stdin */
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#define SSTRING 3 /* string */
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#define SWSTR 4 /* string without \n */
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#define SWORDS 5 /* string[] */
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#define SWORDSEP 6 /* string[] seperator */
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#define SALIAS 7 /* alias expansion */
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#define SREREAD 8 /* read ahead to be re-scanned */
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/* Source.flags values */
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#define SF_ECHO BIT(0) /* echo input to shlout */
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#define SF_ALIAS BIT(1) /* faking space at end of alias */
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#define SF_ALIASEND BIT(2) /* faking space at end of alias */
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#define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
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/*
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* states while lexing word
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*/
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#define SBASE 0 /* outside any lexical constructs */
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#define SWORD 1 /* implicit quoting for substitute() */
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#ifdef KSH
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#define SLETPAREN 2 /* inside (( )), implicit quoting */
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#endif /* KSH */
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#define SSQUOTE 3 /* inside '' */
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#define SDQUOTE 4 /* inside "" */
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#define SBRACE 5 /* inside ${} */
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#define SCSPAREN 6 /* inside $() */
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#define SBQUOTE 7 /* inside `` */
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#define SASPAREN 8 /* inside $(( )) */
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#define SHEREDELIM 9 /* parsing <<,<<- delimiter */
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#define SHEREDQUOTE 10 /* parsing " in <<,<<- delimiter */
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#define SPATTERN 11 /* parsing *(...|...) pattern (*+?@!) */
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#define STBRACE 12 /* parsing ${..[#%]..} */
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typedef union {
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int i;
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char *cp;
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char **wp;
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struct op *o;
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struct ioword *iop;
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} YYSTYPE;
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/* If something is added here, add it to tokentab[] in syn.c as well */
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#define LWORD 256
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#define LOGAND 257 /* && */
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#define LOGOR 258 /* || */
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#define BREAK 259 /* ;; */
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#define IF 260
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#define THEN 261
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#define ELSE 262
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#define ELIF 263
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#define FI 264
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#define CASE 265
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#define ESAC 266
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#define FOR 267
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#define SELECT 268
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#define WHILE 269
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#define UNTIL 270
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#define DO 271
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#define DONE 272
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#define IN 273
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#define FUNCTION 274
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#define TIME 275
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#define REDIR 276
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#ifdef KSH
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#define MDPAREN 277 /* (( )) */
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#endif /* KSH */
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#define BANG 278 /* ! */
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#define DBRACKET 279 /* [[ .. ]] */
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#define COPROC 280 /* |& */
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#define YYERRCODE 300
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/* flags to yylex */
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#define CONTIN BIT(0) /* skip new lines to complete command */
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#define ONEWORD BIT(1) /* single word for substitute() */
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#define ALIAS BIT(2) /* recognize alias */
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#define KEYWORD BIT(3) /* recognize keywords */
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#define LETEXPR BIT(4) /* get expression inside (( )) */
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#define VARASN BIT(5) /* check for var=word */
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#define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
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#define ESACONLY BIT(7) /* only accept esac keyword */
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#define CMDWORD BIT(8) /* parsing simple command (alias related) */
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#define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
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#define HERES 10 /* max << in line */
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EXTERN Source *source; /* yyparse/yylex source */
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EXTERN YYSTYPE yylval; /* result from yylex */
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EXTERN struct ioword *heres [HERES], **herep;
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EXTERN char ident [IDENT+1];
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#ifdef HISTORY
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# define HISTORYSIZE 128 /* size of saved history */
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EXTERN char **history; /* saved commands */
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EXTERN char **histptr; /* last history item */
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EXTERN int histsize; /* history size */
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#endif /* HISTORY */
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