jay/defs.h

   1 /*
   2  * Copyright (c) 1989 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Robert Paul Corbett.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)defs.h      5.6 (Berkeley) 5/24/93
  37  */
  38
  39 #include <assert.h>
  40 #include <ctype.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <errno.h>
  45
  46
  47 /*  machine-dependent definitions                       */
  48 /*  the following definitions are for the Tahoe         */
  49 /*  they might have to be changed for other machines    */
  50
  51 /*  MAXCHAR is the largest unsigned character value     */
  52 /*  MAXSHORT is the largest value of a C short          */
  53 /*  MINSHORT is the most negative value of a C short    */
  54 /*  MAXTABLE is the maximum table size                  */
  55 /*  BITS_PER_WORD is the number of bits in a C unsigned */
  56 /*  WORDSIZE computes the number of words needed to     */
  57 /*      store n bits                                    */
  58 /*  BIT returns the value of the n-th bit starting      */
  59 /*      from r (0-indexed)                              */
  60 /*  SETBIT sets the n-th bit starting from r            */
  61
  62 #define MAXCHAR         255
  63 #define MAXSHORT        32767
  64 #define MINSHORT        -32768
  65 #define MAXTABLE        32500
  66 #define BITS_PER_WORD   32
  67 #define WORDSIZE(n)     (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
  68 #define BIT(r, n)       ((((r)[(n)>>5])>>((n)&31))&1)
  69 #define SETBIT(r, n)    ((r)[(n)>>5]|=((unsigned)1<<((n)&31)))
  70
  71
  72 /*  character names  */
  73
  74 #define NUL             '\0'    /*  the null character  */
  75 #define NEWLINE         '\n'    /*  line feed  */
  76 #define SP              ' '     /*  space  */
  77 #define BS              '\b'    /*  backspace  */
  78 #define HT              '\t'    /*  horizontal tab  */
  79 #define VT              '\013'  /*  vertical tab  */
  80 #define CR              '\r'    /*  carriage return  */
  81 #define FF              '\f'    /*  form feed  */
  82 #define QUOTE           '\''    /*  single quote  */
  83 #define DOUBLE_QUOTE    '\"'    /*  double quote  */
  84 #define BACKSLASH       '\\'    /*  backslash  */
  85
  86
  87 /* defines for constructing filenames */
  88
  89 #define CODE_SUFFIX     ".code.c"
  90 #define DEFINES_SUFFIX  ".tab.h"
  91 #define OUTPUT_SUFFIX   ".tab.c"
  92 #define VERBOSE_SUFFIX  ".output"
  93
  94
  95 /* keyword codes */
  96
  97 #define TOKEN 0
  98 #define LEFT 1
  99 #define RIGHT 2
 100 #define NONASSOC 3
 101 #define MARK 4
 102 #define TEXT 5
 103 #define TYPE 6
 104 #define START 7
 105
 106
 107 /*  symbol classes  */
 108
 109 #define UNKNOWN 0
 110 #define TERM 1
 111 #define NONTERM 2
 112
 113
 114 /*  the undefined value  */
 115
 116 #define UNDEFINED (-1)
 117
 118
 119 /*  action codes  */
 120
 121 #define SHIFT 1
 122 #define REDUCE 2
 123
 124
 125 /*  character macros  */
 126
 127 #define IS_IDENT(c)     (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
 128 #define IS_OCTAL(c)     ((c) >= '0' && (c) <= '7')
 129 #define NUMERIC_VALUE(c)        ((c) - '0')
 130
 131
 132 /*  symbol macros  */
 133
 134 #define ISTOKEN(s)      ((s) < start_symbol)
 135 #define ISVAR(s)        ((s) >= start_symbol)
 136
 137
 138 /*  storage allocation macros  */
 139
 140 #define CALLOC(k,n)     (calloc((unsigned)(k),(unsigned)(n)))
 141 #define FREE(x)         (free((char*)(x)))
 142 #define MALLOC(n)       (malloc((unsigned)(n)))
 143 #define NEW(t)          ((t*)allocate(sizeof(t)))
 144 #define NEW2(n,t)       ((t*)allocate((unsigned)((n)*sizeof(t))))
 145 #define REALLOC(p,n)    (realloc((char*)(p),(unsigned)(n)))
 146
 147
 148 /*  the structure of a symbol table entry  */
 149
 150 typedef struct bucket bucket;
 151 struct bucket
 152 {
 153     struct bucket *link;
 154     struct bucket *next;
 155     char *name;
 156     char *tag;
 157     short value;
 158     short index;
 159     short prec;
 160     char class;
 161     char assoc;
 162 };
 163
 164
 165 /*  the structure of the LR(0) state machine  */
 166
 167 typedef struct core core;
 168 struct core
 169 {
 170     struct core *next;
 171     struct core *link;
 172     short number;
 173     short accessing_symbol;
 174     short nitems;
 175     short items[1];
 176 };
 177
 178
 179 /*  the structure used to record shifts  */
 180
 181 typedef struct shifts shifts;
 182 struct shifts
 183 {
 184     struct shifts *next;
 185     short number;
 186     short nshifts;
 187     short shift[1];
 188 };
 189
 190
 191 /*  the structure used to store reductions  */
 192
 193 typedef struct reductions reductions;
 194 struct reductions
 195 {
 196     struct reductions *next;
 197     short number;
 198     short nreds;
 199     short rules[1];
 200 };
 201
 202
 203 /*  the structure used to represent parser actions  */
 204
 205 typedef struct action action;
 206 struct action
 207 {
 208     struct action *next;
 209     short symbol;
 210     short number;
 211     short prec;
 212     char action_code;
 213     char assoc;
 214     char suppressed;
 215 };
 216
 217
 218 /* global variables */
 219
 220 extern char tflag;
 221 extern char vflag;
 222
 223 extern char *myname;
 224 extern char *cptr;
 225 extern char *line;
 226 extern int lineno;
 227 extern int outline;
 228
 229 extern char *action_file_name;
 230 extern char *input_file_name;
 231 extern char *prolog_file_name;
 232 extern char *local_file_name;
 233 extern char *verbose_file_name;
 234
 235 extern FILE *action_file;
 236 extern FILE *input_file;
 237 extern FILE *prolog_file;
 238 extern FILE *local_file;
 239 extern FILE *verbose_file;
 240
 241 extern int nitems;
 242 extern int nrules;
 243 extern int nsyms;
 244 extern int ntokens;
 245 extern int nvars;
 246 extern int ntags;
 247
 248 extern char *line_format;
 249 extern char *default_line_format;
 250
 251 extern int   start_symbol;
 252 extern char  **symbol_name;
 253 extern short *symbol_value;
 254 extern short *symbol_prec;
 255 extern char  *symbol_assoc;
 256
 257 extern short *ritem;
 258 extern short *rlhs;
 259 extern short *rrhs;
 260 extern short *rprec;
 261 extern char  *rassoc;
 262
 263 extern short **derives;
 264 extern char *nullable;
 265
 266 extern bucket *first_symbol;
 267 extern bucket *last_symbol;
 268
 269 extern int nstates;
 270 extern core *first_state;
 271 extern shifts *first_shift;
 272 extern reductions *first_reduction;
 273 extern short *accessing_symbol;
 274 extern core **state_table;
 275 extern shifts **shift_table;
 276 extern reductions **reduction_table;
 277 extern unsigned *LA;
 278 extern short *LAruleno;
 279 extern short *lookaheads;
 280 extern short *goto_map;
 281 extern short *from_state;
 282 extern short *to_state;
 283
 284 extern action **parser;
 285 extern int SRtotal;
 286 extern int RRtotal;
 287 extern short *SRconflicts;
 288 extern short *RRconflicts;
 289 extern short *defred;
 290 extern short *rules_used;
 291 extern short nunused;
 292 extern short final_state;
 293
 294 /* global functions */
 295
 296 extern char *allocate();
 297 extern bucket *lookup();
 298 extern bucket *make_bucket();
 299
 300