usr.bin/yacc/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  * $FreeBSD: src/usr.bin/yacc/defs.h,v 1.8.2.1 2001/10/05 03:00:19 obrien Exp $
  38  * $DragonFly: src/usr.bin/yacc/defs.h,v 1.5 2005/01/05 15:26:05 joerg Exp $
  39  */
  40
  41 #include <assert.h>
  42 #include <ctype.h>
  43 #include <err.h>
  44 #include <stdio.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 #define UNION 8
 106 #define IDENT 9
 107 #define EXPECT 10
 108
 109
 110 /*  symbol classes  */
 111
 112 #define UNKNOWN 0
 113 #define TERM 1
 114 #define NONTERM 2
 115
 116
 117 /*  the undefined value  */
 118
 119 #define UNDEFINED (-1)
 120
 121
 122 /*  action codes  */
 123
 124 #define SHIFT 1
 125 #define REDUCE 2
 126
 127
 128 /*  character macros  */
 129
 130 #define IS_IDENT(c)     (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
 131 #define IS_OCTAL(c)     ((c) >= '0' && (c) <= '7')
 132 #define NUMERIC_VALUE(c)        ((c) - '0')
 133
 134
 135 /*  symbol macros  */
 136
 137 #define ISTOKEN(s)      ((s) < start_symbol)
 138 #define ISVAR(s)        ((s) >= start_symbol)
 139
 140
 141 /*  storage allocation macros  */
 142
 143 #define CALLOC(k,n)     (calloc((unsigned)(k),(unsigned)(n)))
 144 #define FREE(x)         (free((char*)(x)))
 145 #define MALLOC(n)       (malloc((unsigned)(n)))
 146 #define NEW(t)          ((t*)allocate(sizeof(t)))
 147 #define NEW2(n,t)       ((t*)allocate((unsigned)((n)*sizeof(t))))
 148 #define REALLOC(p,n)    (realloc((char*)(p),(unsigned)(n)))
 149
 150
 151 /*  the structure of a symbol table entry  */
 152
 153 typedef struct bucket bucket;
 154 struct bucket
 155 {
 156     struct bucket *link;
 157     struct bucket *next;
 158     char *name;
 159     char *tag;
 160     short value;
 161     short index;
 162     short prec;
 163     char class;
 164     char assoc;
 165 };
 166
 167
 168 /*  the structure of the LR(0) state machine  */
 169
 170 typedef struct core core;
 171 struct core
 172 {
 173     struct core *next;
 174     struct core *link;
 175     short number;
 176     short accessing_symbol;
 177     short nitems;
 178     short items[1];
 179 };
 180
 181
 182 /*  the structure used to record shifts  */
 183
 184 typedef struct shifts shifts;
 185 struct shifts
 186 {
 187     struct shifts *next;
 188     short number;
 189     short nshifts;
 190     short shift[1];
 191 };
 192
 193
 194 /*  the structure used to store reductions  */
 195
 196 typedef struct reductions reductions;
 197 struct reductions
 198 {
 199     struct reductions *next;
 200     short number;
 201     short nreds;
 202     short rules[1];
 203 };
 204
 205
 206 /*  the structure used to represent parser actions  */
 207
 208 typedef struct action action;
 209 struct action
 210 {
 211     struct action *next;
 212     short symbol;
 213     short number;
 214     short prec;
 215     char action_code;
 216     char assoc;
 217     char suppressed;
 218 };
 219
 220
 221 /* global variables */
 222
 223 extern char dflag;
 224 extern char lflag;
 225 extern char rflag;
 226 extern char tflag;
 227 extern char vflag;
 228 extern const char *symbol_prefix;
 229
 230 extern const char *cptr;
 231 extern char *line;
 232 extern int lineno;
 233 extern int outline;
 234
 235 extern const char *banner[];
 236 extern const char *tables[];
 237 extern const char *header[];
 238 extern const char *body[];
 239 extern const char *trailer[];
 240
 241 extern char *action_file_name;
 242 extern char *code_file_name;
 243 extern char *defines_file_name;
 244 extern const char *input_file_name;
 245 extern char *output_file_name;
 246 extern char *text_file_name;
 247 extern char *union_file_name;
 248 extern char *verbose_file_name;
 249
 250 extern FILE *action_file;
 251 extern FILE *code_file;
 252 extern FILE *defines_file;
 253 extern FILE *input_file;
 254 extern FILE *output_file;
 255 extern FILE *text_file;
 256 extern FILE *union_file;
 257 extern FILE *verbose_file;
 258
 259 extern int nitems;
 260 extern int nrules;
 261 extern int nsyms;
 262 extern int ntokens;
 263 extern int nvars;
 264 extern int ntags;
 265
 266 extern char unionized;
 267
 268 extern int   start_symbol;
 269 extern char  **symbol_name;
 270 extern short *symbol_value;
 271 extern short *symbol_prec;
 272 extern char  *symbol_assoc;
 273
 274 extern short *ritem;
 275 extern short *rlhs;
 276 extern short *rrhs;
 277 extern short *rprec;
 278 extern char  *rassoc;
 279
 280 extern short **derives;
 281 extern char *nullable;
 282
 283 extern bucket *first_symbol;
 284 extern bucket *last_symbol;
 285
 286 extern int nstates;
 287 extern core *first_state;
 288 extern shifts *first_shift;
 289 extern reductions *first_reduction;
 290 extern short *accessing_symbol;
 291 extern core **state_table;
 292 extern shifts **shift_table;
 293 extern reductions **reduction_table;
 294 extern unsigned *LA;
 295 extern short *LAruleno;
 296 extern short *lookaheads;
 297 extern short *goto_map;
 298 extern short *from_state;
 299 extern short *to_state;
 300
 301 extern action **parser;
 302 extern int SRexpect;
 303 extern int SRtotal;
 304 extern int RRtotal;
 305 extern short *SRconflicts;
 306 extern short *RRconflicts;
 307 extern short *defred;
 308 extern short *rules_used;
 309 extern short nunused;
 310 extern short final_state;
 311
 312 /* global functions */
 313
 314 char *allocate(unsigned);
 315 void closure(short *, int);
 316 void create_symbol_table(void);
 317 void default_action_warning(void);
 318 void dollar_error(int, const char *, const char *);
 319 void dollar_warning(int, int);
 320 void fatal(const char *msg);
 321 void finalize_closure(void);
 322 void free_parser(void);
 323 void free_symbols(void);
 324 void free_symbol_table(void);
 325 void illegal_character(const char *);
 326 void illegal_tag(int, const char *, const char *);
 327 void lalr(void);
 328 bucket *lookup(char *);
 329 void lr0(void);
 330 bucket *make_bucket(const char *);
 331 void make_parser(void);
 332 void no_grammar(void);
 333 void no_space(void);
 334 void open_error(const char *);
 335 void output(void);
 336 void over_unionized(const char *);
 337 void prec_redeclared(void);
 338 void reader(void);
 339 void reflexive_transitive_closure(unsigned *, int);
 340 void reprec_warning(const char *);
 341 void restarted_warning(void);
 342 void retyped_warning(const char *);
 343 void revalued_warning(const char *);
 344 void set_first_derives(void);
 345 void syntax_error(int, const char *, const char *);
 346 void terminal_lhs(int);
 347 void terminal_start(const char *);
 348 void tokenized_start(const char *);
 349 void undefined_goal(const char *);
 350 void undefined_symbol_warning(const char *);
 351 void unexpected_EOF(void);
 352 void unknown_rhs(int);
 353 void unterminated_action(int, const char *, const char *);
 354 void unterminated_comment(int, const char *, const char *);
 355 void unterminated_string(int, const char *, const char *);
 356 void unterminated_text(int, const char *, const char *);
 357 void unterminated_union(int, const char *, const char *);
 358 void untyped_lhs(void);
 359 void untyped_rhs(int, const char *);
 360 void used_reserved(const char *);
 361 void verbose(void);
 362 void write_section(const char **);