1 /* 2 * Source input, lexer and parser 3 */ 4 5 /* $Id: lex.h,v 1.4 1994/05/31 13:34:34 michael Exp $ */ 6 7 #define IDENT 64 8 9 typedef struct source Source; 10 struct source { 11 const char *str; /* input pointer */ 12 int type; /* input type */ 13 const char *start; /* start of current buffer */ 14 union { 15 char **strv; /* string [] */ 16 struct shf *shf; /* shell file */ 17 struct tbl *tblp; /* alias (SALIAS) */ 18 char *freeme; /* also for SREREAD */ 19 } u; 20 char ugbuf[2]; /* buffer for ungetsc() (SREREAD) and 21 * alias (SALIAS) */ 22 int line; /* line number */ 23 int errline; /* line the error occured on (0 if not set) */ 24 const char *file; /* input file name */ 25 int flags; /* SF_* */ 26 Area *areap; 27 XString xs; /* input buffer */ 28 Source *next; /* stacked source */ 29 }; 30 31 /* Source.type values */ 32 #define SEOF 0 /* input EOF */ 33 #define SFILE 1 /* file input */ 34 #define SSTDIN 2 /* read stdin */ 35 #define SSTRING 3 /* string */ 36 #define SWSTR 4 /* string without \n */ 37 #define SWORDS 5 /* string[] */ 38 #define SWORDSEP 6 /* string[] seperator */ 39 #define SALIAS 7 /* alias expansion */ 40 #define SREREAD 8 /* read ahead to be re-scanned */ 41 42 /* Source.flags values */ 43 #define SF_ECHO BIT(0) /* echo input to shlout */ 44 #define SF_ALIAS BIT(1) /* faking space at end of alias */ 45 #define SF_ALIASEND BIT(2) /* faking space at end of alias */ 46 #define SF_TTY BIT(3) /* type == SSTDIN & it is a tty */ 47 48 /* 49 * states while lexing word 50 */ 51 #define SBASE 0 /* outside any lexical constructs */ 52 #define SWORD 1 /* implicit quoting for substitute() */ 53 #ifdef KSH 54 #define SLETPAREN 2 /* inside (( )), implicit quoting */ 55 #endif /* KSH */ 56 #define SSQUOTE 3 /* inside '' */ 57 #define SDQUOTE 4 /* inside "" */ 58 #define SBRACE 5 /* inside ${} */ 59 #define SCSPAREN 6 /* inside $() */ 60 #define SBQUOTE 7 /* inside `` */ 61 #define SASPAREN 8 /* inside $(( )) */ 62 #define SHEREDELIM 9 /* parsing <<,<<- delimiter */ 63 #define SHEREDQUOTE 10 /* parsing " in <<,<<- delimiter */ 64 #define SPATTERN 11 /* parsing *(...|...) pattern (*+?@!) */ 65 #define STBRACE 12 /* parsing ${..[#%]..} */ 66 67 typedef union { 68 int i; 69 char *cp; 70 char **wp; 71 struct op *o; 72 struct ioword *iop; 73 } YYSTYPE; 74 75 /* If something is added here, add it to tokentab[] in syn.c as well */ 76 #define LWORD 256 77 #define LOGAND 257 /* && */ 78 #define LOGOR 258 /* || */ 79 #define BREAK 259 /* ;; */ 80 #define IF 260 81 #define THEN 261 82 #define ELSE 262 83 #define ELIF 263 84 #define FI 264 85 #define CASE 265 86 #define ESAC 266 87 #define FOR 267 88 #define SELECT 268 89 #define WHILE 269 90 #define UNTIL 270 91 #define DO 271 92 #define DONE 272 93 #define IN 273 94 #define FUNCTION 274 95 #define TIME 275 96 #define REDIR 276 97 #ifdef KSH 98 #define MDPAREN 277 /* (( )) */ 99 #endif /* KSH */ 100 #define BANG 278 /* ! */ 101 #define DBRACKET 279 /* [[ .. ]] */ 102 #define COPROC 280 /* |& */ 103 #define YYERRCODE 300 104 105 /* flags to yylex */ 106 #define CONTIN BIT(0) /* skip new lines to complete command */ 107 #define ONEWORD BIT(1) /* single word for substitute() */ 108 #define ALIAS BIT(2) /* recognize alias */ 109 #define KEYWORD BIT(3) /* recognize keywords */ 110 #define LETEXPR BIT(4) /* get expression inside (( )) */ 111 #define VARASN BIT(5) /* check for var=word */ 112 #define ARRAYVAR BIT(6) /* parse x[1 & 2] as one word */ 113 #define ESACONLY BIT(7) /* only accept esac keyword */ 114 #define CMDWORD BIT(8) /* parsing simple command (alias related) */ 115 #define HEREDELIM BIT(9) /* parsing <<,<<- delimiter */ 116 117 #define HERES 10 /* max << in line */ 118 119 EXTERN Source *source; /* yyparse/yylex source */ 120 EXTERN YYSTYPE yylval; /* result from yylex */ 121 EXTERN struct ioword *heres [HERES], **herep; 122 EXTERN char ident [IDENT+1]; 123 124 #ifdef HISTORY 125 # define HISTORYSIZE 128 /* size of saved history */ 126 127 EXTERN char **history; /* saved commands */ 128 EXTERN char **histptr; /* last history item */ 129 EXTERN int histsize; /* history size */ 130 #endif /* HISTORY */ 131