diff options
Diffstat (limited to 'lex.h')
| -rw-r--r-- | lex.h | 133 |
1 files changed, 133 insertions, 0 deletions
@@ -0,0 +1,133 @@ +/* $NetBSD: lex.h,v 1.7 2005/09/11 22:16:00 christos Exp $ */ + +/* + * Source input, lexer and parser + */ + +/* $Id: lex.h,v 1.7 2005/09/11 22:16:00 christos 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[] separator */ +#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 HEREDOC BIT(10) /* parsing heredoc */ + +#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 */ |