bin/ksh/lex.h

   1 /*      $NetBSD: lex.h,v 1.7 2005/09/11 22:16:00 christos Exp $ */
   2
   3 /*
   4  * Source input, lexer and parser
   5  */
   6
   7 /* $Id: lex.h,v 1.7 2005/09/11 22:16:00 christos 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[] separator */
  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 #define HEREDOC BIT(10)         /* parsing heredoc */
 119
 120 #define HERES   10              /* max << in line */
 121
 122 EXTERN  Source *source;         /* yyparse/yylex source */
 123 EXTERN  YYSTYPE yylval;         /* result from yylex */
 124 EXTERN  struct ioword *heres [HERES], **herep;
 125 EXTERN  char    ident [IDENT+1];
 126
 127 #ifdef HISTORY
 128 # define HISTORYSIZE    128     /* size of saved history */
 129
 130 EXTERN  char  **histlist;       /* saved commands */
 131 EXTERN  char  **histptr;        /* last history item */
 132 EXTERN  int     histsize;       /* history size */
 133 #endif /* HISTORY */