commands/awk/awk.h

   1 /*
   2  * a small awk clone
   3  *
   4  * (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
   5  *
   6  * Absolutely no warranty. Use this software with your own risk.
   7  *
   8  * Permission to use, copy, modify and distribute this software for any
   9  * purpose and without fee is hereby granted, provided that the above
  10  * copyright and disclaimer notice.
  11  *
  12  * This program was written to fit into 64K+64K memory of the Minix 1.2.
  13  */
  14
  15 /* lexical/parser tokens and executable statements */
  16
  17 #define FIRSTP  256
  18 #define ARG     256
  19 #define ARITH   257
  20 #define ARRAY   258
  21 #define ASSIGN  259
  22 #define CALL    260
  23 #define CAT     261
  24 #define COND    262
  25 #define DELETE  263
  26 #define DO      264
  27 #define ELEMENT 265
  28 #define FIELD   266
  29 #define FOR     267
  30 #define FORIN   268
  31 #define GETLINE 269
  32 #define IF      270
  33 #define IN      271
  34 #define JUMP    272
  35 #define MATHFUN 273
  36 #define NULPROC 274
  37 #define P1STAT  275
  38 #define P2STAT  276
  39 #define PRINT   277
  40 #define PRINT0  278
  41 #define STRFUN  279
  42 #define SUBST   280
  43 #define USRFUN  281
  44 #define WHILE   282
  45 #define LASTP   282
  46         /* lexical token */
  47
  48 #define ADD     300     /* + */
  49 #define ADDEQ   301     /* += */
  50 #define AND     302     /* && */
  51 #define BEGIN   303     /* BEGIN */
  52 #define BINAND  304     /* & */
  53 #define BINOR   305     /* | */
  54 #define BREAK   306     /* break */
  55 #define CLOSE   307     /* close */
  56 #define CONTIN  308     /* continue */
  57 #define DEC     309     /* -- */
  58 #define DIV     310     /* / */
  59 #define DIVEQ   311     /* /= */
  60 #define ELSE    312     /* else */
  61 #define END     313     /* END */
  62 #define EOL     314     /* ; or '\n' */
  63 #define EQ      315     /* == */
  64 #define EXIT    316     /* exit */
  65 #define FUNC    317     /* function */
  66 #define GE      318     /* >= */
  67 #define GT      319     /* > */
  68 #define IDENT   320     /* identifier */
  69 #define INC     321     /* ++ */
  70 #define LE      322     /* <= */
  71 #define LT      323     /* < */
  72 #define MATCH   324     /* ~ */
  73 #define MOD     325     /* % */
  74 #define MODEQ   326     /* %= */
  75 #define MULT    327     /* * */
  76 #define MULTEQ  328     /* *= */
  77 #define NE      329     /* != */
  78 #define NEXT    330     /* next */
  79 #define NOMATCH 331     /* !~ */
  80 #define NOT     332     /* ! */
  81 #define NUMBER  333     /* integer or floating number */
  82 #define OR      334     /* || */
  83 #define POWEQ   335     /* ^= */
  84 #define POWER   336     /* ^ */
  85 #define PRINTF  337     /* printf */
  86 #define REGEXP  338     /* /REG/ */
  87 #define RETURN  339     /* return */
  88 #define SHIFTL  340     /* << */
  89 #define SHIFTR  341     /* >> */
  90 #define SPRINT  342     /* sprint */
  91 #define SPRINTF 343     /* sprintf */
  92 #define STRING  344     /* ".." */
  93 #define SUB     345     /* - */
  94 #define SUBEQ   346     /* -= */
  95 #define SYSTEM  347     /* system */
  96 #define UMINUS  348     /* - */
  97
  98 /* tokens in parser */
  99
 100 #define VALUE   400     /* value node */
 101 #define INCDEC  401     /* ++, -- */
 102 #define PRE     402     /* pre incre/decre */
 103 #define POST    403     /* post incre/decre */
 104
 105 /* redirect in print(f) statement */
 106
 107 #define R_OUT   410     /* > */
 108 #define R_APD   411     /* >> */
 109 #define R_PIPE  412     /* | */
 110 #define R_IN    413     /* < */
 111 #define R_PIN   414     /* | getline */
 112 #define R_POUT  415     /* print | */
 113
 114 /* function */
 115
 116 #define ATAN2   500     /* atan2 */
 117 #define COS     501     /* cos */
 118 #define EXP     502     /* exp */
 119 #define INDEX   503     /* index */
 120 #define INT     504     /* int */
 121 #define LENGTH  505     /* length */
 122 #define LOG     506     /* log */
 123 #define RAND    507     /* rand */
 124 #define RGSUB   508     /* gsub */
 125 #define RMATCH  509     /* match */
 126 #define RSUB    510     /* sub */
 127 #define SIN     511     /* sin */
 128 #define SPLIT   512     /* split */
 129 #define SQRT    513     /* sqrt */
 130 #define SRAND   514     /* srand */
 131 #define SUBSTR  515     /* substr */
 132
 133 /* print(f) options */
 134
 135 #define FORMAT  1024    /* PRINTF, SPRINTF */
 136 #define STROUT  2048    /* SPRINTF */
 137 #define PRMASK  0x3ff   /* ~(FORMAT|STROUT) */
 138
 139         /* node - used in parsed tree */
 140
 141 struct node {
 142   int n_type;                   /* node type */
 143   struct node *n_next;          /* pointer to next node */
 144   struct node *n_arg[1];        /* argument (variable length) */
 145 };
 146
 147 typedef struct node NODE;
 148
 149         /* object cell */
 150
 151 struct cell {
 152   int c_type;           /* cell type */
 153   char *c_sval;         /* string value */
 154   double c_fval;        /* floating value */
 155 };
 156
 157 typedef struct cell CELL;
 158
 159         /* cell type */
 160
 161 #define UDF     0       /* pass parameter */
 162 #define VAR     1       /* variable */
 163 #define NUM     2       /* number */
 164 #define ARR     4       /* array */
 165 #define STR     8       /* string */
 166 #define REC     16      /* record */
 167 #define FLD     32      /* filed */
 168 #define PAT     64      /* pattern (compiled REGEXPR) */
 169 #define BRK     128     /* break */
 170 #define CNT     256     /* continue */
 171 #define NXT     512     /* next */
 172 #define EXT     1024    /* exit */
 173 #define RTN     2048    /* return */
 174 #define TMP     4096    /* temp cell */
 175 #define POS     8192    /* argument position */
 176 #define FUN     16384   /* function */
 177
 178         /* symbol cell - linked to symbol table */
 179
 180 struct symbol {
 181   char *s_name;
 182   CELL *s_val;
 183   struct symbol *s_next;
 184 };
 185
 186 typedef struct symbol SYMBOL;