47b5291b9c
history() when this program is crunched into /rescue tools fixes PR bin/24556 by Kouichirou Hiratsuka
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* $NetBSD: lex.h,v 1.5 2004/02/26 08:24:03 jdolecek Exp $ */
|
|
|
|
/*
|
|
* Source input, lexer and parser
|
|
*/
|
|
|
|
/* $Id: lex.h,v 1.5 2004/02/26 08:24:03 jdolecek Exp $ */
|
|
|
|
#define IDENT 64
|
|
|
|
typedef struct source Source;
|
|
struct source {
|
|
const char *str; /* input pointer */
|
|
int type; /* input type */
|
|
const char *start; /* start of current buffer */
|
|
union {
|
|
char **strv; /* string [] */
|
|
struct shf *shf; /* shell file */
|
|
struct tbl *tblp; /* alias (SALIAS) */
|
|
char *freeme; /* also for SREREAD */
|
|
} u;
|
|
char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and
|
|
* alias (SALIAS) */
|
|
int line; /* line number */
|
|
int errline; /* line the error occurred on (0 if not set) */
|
|
const char *file; /* input file name */
|
|
int flags; /* SF_* */
|
|
Area *areap;
|
|
XString xs; /* input buffer */
|
|
Source *next; /* stacked source */
|
|
};
|
|
|
|
/* Source.type values */
|
|
#define SEOF 0 /* input EOF */
|
|
#define SFILE 1 /* file input */
|
|
#define SSTDIN 2 /* read stdin */
|
|
#define SSTRING 3 /* string */
|
|
#define SWSTR 4 /* string without \n */
|
|
#define SWORDS 5 /* string[] */
|
|
#define SWORDSEP 6 /* string[] seperator */
|
|
#define SALIAS 7 /* alias expansion */
|
|
#define SREREAD 8 /* read ahead to be re-scanned */
|
|
|
|
/* Source.flags values */
|
|
#define SF_ECHO BIT(0) /* echo input to shlout */
|
|
#define SF_ALIAS BIT(1) /* faking space at end of alias */
|
|
#define SF_ALIASEND BIT(2) /* faking space at end of alias */
|
|
#define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */
|
|
|
|
/*
|
|
* states while lexing word
|
|
*/
|
|
#define SBASE 0 /* outside any lexical constructs */
|
|
#define SWORD 1 /* implicit quoting for substitute() */
|
|
#ifdef KSH
|
|
#define SLETPAREN 2 /* inside (( )), implicit quoting */
|
|
#endif /* KSH */
|
|
#define SSQUOTE 3 /* inside '' */
|
|
#define SDQUOTE 4 /* inside "" */
|
|
#define SBRACE 5 /* inside ${} */
|
|
#define SCSPAREN 6 /* inside $() */
|
|
#define SBQUOTE 7 /* inside `` */
|
|
#define SASPAREN 8 /* inside $(( )) */
|
|
#define SHEREDELIM 9 /* parsing <<,<<- delimiter */
|
|
#define SHEREDQUOTE 10 /* parsing " in <<,<<- delimiter */
|
|
#define SPATTERN 11 /* parsing *(...|...) pattern (*+?@!) */
|
|
#define STBRACE 12 /* parsing ${..[#%]..} */
|
|
|
|
typedef union {
|
|
int i;
|
|
char *cp;
|
|
char **wp;
|
|
struct op *o;
|
|
struct ioword *iop;
|
|
} YYSTYPE;
|
|
|
|
/* If something is added here, add it to tokentab[] in syn.c as well */
|
|
#define LWORD 256
|
|
#define LOGAND 257 /* && */
|
|
#define LOGOR 258 /* || */
|
|
#define BREAK 259 /* ;; */
|
|
#define IF 260
|
|
#define THEN 261
|
|
#define ELSE 262
|
|
#define ELIF 263
|
|
#define FI 264
|
|
#define CASE 265
|
|
#define ESAC 266
|
|
#define FOR 267
|
|
#define SELECT 268
|
|
#define WHILE 269
|
|
#define UNTIL 270
|
|
#define DO 271
|
|
#define DONE 272
|
|
#define IN 273
|
|
#define FUNCTION 274
|
|
#define TIME 275
|
|
#define REDIR 276
|
|
#ifdef KSH
|
|
#define MDPAREN 277 /* (( )) */
|
|
#endif /* KSH */
|
|
#define BANG 278 /* ! */
|
|
#define DBRACKET 279 /* [[ .. ]] */
|
|
#define COPROC 280 /* |& */
|
|
#define YYERRCODE 300
|
|
|
|
/* flags to yylex */
|
|
#define CONTIN BIT(0) /* skip new lines to complete command */
|
|
#define ONEWORD BIT(1) /* single word for substitute() */
|
|
#define ALIAS BIT(2) /* recognize alias */
|
|
#define KEYWORD BIT(3) /* recognize keywords */
|
|
#define LETEXPR BIT(4) /* get expression inside (( )) */
|
|
#define VARASN BIT(5) /* check for var=word */
|
|
#define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */
|
|
#define ESACONLY BIT(7) /* only accept esac keyword */
|
|
#define CMDWORD BIT(8) /* parsing simple command (alias related) */
|
|
#define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */
|
|
|
|
#define HERES 10 /* max << in line */
|
|
|
|
EXTERN Source *source; /* yyparse/yylex source */
|
|
EXTERN YYSTYPE yylval; /* result from yylex */
|
|
EXTERN struct ioword *heres [HERES], **herep;
|
|
EXTERN char ident [IDENT+1];
|
|
|
|
#ifdef HISTORY
|
|
# define HISTORYSIZE 128 /* size of saved history */
|
|
|
|
EXTERN char **histlist; /* saved commands */
|
|
EXTERN char **histptr; /* last history item */
|
|
EXTERN int histsize; /* history size */
|
|
#endif /* HISTORY */
|