1 /* $NetBSD: lex.h,v 1.4 2001/09/16 16:34:23 wiz Exp $ */ 2 3 /* 4 * Source input, lexer and parser 5 */ 6 7 /* $Id: lex.h,v 1.4 2001/09/16 16:34:23 wiz Exp $ */ 8 9 #define IDENT 64 10 11 typedef struct source Source; 12 struct source { 13 const char *str; /* input pointer */ 14 int type; /* input type */ 15 const char *start; /* start of current buffer */ 16 union { 17 char **strv; /* string [] */ 18 struct shf *shf; /* shell file */ 19 struct tbl *tblp; /* alias (SALIAS) */ 20 char *freeme; /* also for SREREAD */ 21 } u; 22 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and 23 * alias (SALIAS) */ 24 int line; /* line number */ 25 int errline; /* line the error occurred on (0 if not set) */ 26 const char *file; /* input file name */ 27 int flags; /* SF_* */ 28 Area *areap; 29 XString xs; /* input buffer */ 30 Source *next; /* stacked source */ 31 }; 32 33 /* Source.type values */ 34 #define SEOF 0 /* input EOF */ 35 #define SFILE 1 /* file input */ 36 #define SSTDIN 2 /* read stdin */ 37 #define SSTRING 3 /* string */ 38 #define SWSTR 4 /* string without \n */ 39 #define SWORDS 5 /* string[] */ 40 #define SWORDSEP 6 /* string[] seperator */ 41 #define SALIAS 7 /* alias expansion */ 42 #define SREREAD 8 /* read ahead to be re-scanned */ 43 44 /* Source.flags values */ 45 #define SF_ECHO BIT(0) /* echo input to shlout */ 46 #define SF_ALIAS BIT(1) /* faking space at end of alias */ 47 #define SF_ALIASEND BIT(2) /* faking space at end of alias */ 48 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */ 49 50 /* 51 * states while lexing word 52 */ 53 #define SBASE 0 /* outside any lexical constructs */ 54 #define SWORD 1 /* implicit quoting for substitute() */ 55 #ifdef KSH 56 #define SLETPAREN 2 /* inside (( )), implicit quoting */ 57 #endif /* KSH */ 58 #define SSQUOTE 3 /* inside '' */ 59 #define SDQUOTE 4 /* inside "" */ 60 #define SBRACE 5 /* inside ${} */ 61 #define SCSPAREN 6 /* inside $() */ 62 #define SBQUOTE 7 /* inside `` */ 63 #define SASPAREN 8 /* inside $(( )) */ 64 #define SHEREDELIM 9 /* parsing <<,<<- delimiter */ 65 #define SHEREDQUOTE 10 /* parsing " in <<,<<- delimiter */ 66 #define SPATTERN 11 /* parsing *(...|...) pattern (*+?@!) */ 67 #define STBRACE 12 /* parsing ${..[#%]..} */ 68 69 typedef union { 70 int i; 71 char *cp; 72 char **wp; 73 struct op *o; 74 struct ioword *iop; 75 } YYSTYPE; 76 77 /* If something is added here, add it to tokentab[] in syn.c as well */ 78 #define LWORD 256 79 #define LOGAND 257 /* && */ 80 #define LOGOR 258 /* || */ 81 #define BREAK 259 /* ;; */ 82 #define IF 260 83 #define THEN 261 84 #define ELSE 262 85 #define ELIF 263 86 #define FI 264 87 #define CASE 265 88 #define ESAC 266 89 #define FOR 267 90 #define SELECT 268 91 #define WHILE 269 92 #define UNTIL 270 93 #define DO 271 94 #define DONE 272 95 #define IN 273 96 #define FUNCTION 274 97 #define TIME 275 98 #define REDIR 276 99 #ifdef KSH 100 #define MDPAREN 277 /* (( )) */ 101 #endif /* KSH */ 102 #define BANG 278 /* ! */ 103 #define DBRACKET 279 /* [[ .. ]] */ 104 #define COPROC 280 /* |& */ 105 #define YYERRCODE 300 106 107 /* flags to yylex */ 108 #define CONTIN BIT(0) /* skip new lines to complete command */ 109 #define ONEWORD BIT(1) /* single word for substitute() */ 110 #define ALIAS BIT(2) /* recognize alias */ 111 #define KEYWORD BIT(3) /* recognize keywords */ 112 #define LETEXPR BIT(4) /* get expression inside (( )) */ 113 #define VARASN BIT(5) /* check for var=word */ 114 #define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */ 115 #define ESACONLY BIT(7) /* only accept esac keyword */ 116 #define CMDWORD BIT(8) /* parsing simple command (alias related) */ 117 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */ 118 119 #define HERES 10 /* max << in line */ 120 121 EXTERN Source *source; /* yyparse/yylex source */ 122 EXTERN YYSTYPE yylval; /* result from yylex */ 123 EXTERN struct ioword *heres [HERES], **herep; 124 EXTERN char ident [IDENT+1]; 125 126 #ifdef HISTORY 127 # define HISTORYSIZE 128 /* size of saved history */ 128 129 EXTERN char **history; /* saved commands */ 130 EXTERN char **histptr; /* last history item */ 131 EXTERN int histsize; /* history size */ 132 #endif /* HISTORY */ 133