commands/byacc/defs.h

   1 #include <assert.h>
   2 #include <ctype.h>
   3 #include <stdio.h>
   4
   5
   6 /*  machine-dependent definitions                       */
   7 /*  the following definitions are for the Tahoe         */
   8 /*  they might have to be changed for other machines    */
   9
  10 /*  MAXCHAR is the largest unsigned character value     */
  11 /*  MAXSHORT is the largest value of a C short          */
  12 /*  MINSHORT is the most negative value of a C short    */
  13 /*  MAXTABLE is the maximum table size                  */
  14 /*  BITS_PER_WORD is the number of bits in a C unsigned */
  15 /*  WORDSIZE computes the number of words needed to     */
  16 /*      store n bits                                    */
  17 /*  BIT returns the value of the n-th bit starting      */
  18 /*      from r (0-indexed)                              */
  19 /*  SETBIT sets the n-th bit starting from r            */
  20
  21 #if !__STDC__
  22 #define MAXCHAR         255
  23 #define MAXSHORT        32767
  24 #define MINSHORT        -32768
  25 #define BITS_PER_WORD   32
  26 #else
  27 #include <limits.h>
  28 #define MAXCHAR         UCHAR_MAX
  29 #define MAXSHORT        SHRT_MAX
  30 #define MINSHORT        SHRT_MIN
  31 #define BITS_PER_WORD   (INT_MAX == 32767 ? 16 : 32)
  32 #define BITS_PER_BPW    (INT_MAX == 32767 ? 4 : 5)
  33 #endif
  34 #define MAXTABLE        32500
  35 #define WORDSIZE(n)     (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
  36 #define BIT(r, n)       ((((r)[(n)>>BITS_PER_BPW])>>((n)&(BITS_PER_WORD-1)))&1)
  37 #define SETBIT(r, n)    ((r)[(n)>>BITS_PER_BPW]|=((unsigned)1<<((n)&(BITS_PER_WORD-1))))
  38
  39
  40 /*  character names  */
  41
  42 #define NUL             '\0'    /*  the null character  */
  43 #define NEWLINE         '\n'    /*  line feed  */
  44 #define SP              ' '     /*  space  */
  45 #define BS              '\b'    /*  backspace  */
  46 #define HT              '\t'    /*  horizontal tab  */
  47 #define VT              '\013'  /*  vertical tab  */
  48 #define CR              '\r'    /*  carriage return  */
  49 #define FF              '\f'    /*  form feed  */
  50 #define QUOTE           '\''    /*  single quote  */
  51 #define DOUBLE_QUOTE    '\"'    /*  double quote  */
  52 #define BACKSLASH       '\\'    /*  backslash  */
  53
  54
  55 /* defines for constructing filenames */
  56
  57 #define CODE_SUFFIX     ".code.c"
  58 #define DEFINES_SUFFIX  ".tab.h"
  59 #define OUTPUT_SUFFIX   ".tab.c"
  60 #define VERBOSE_SUFFIX  ".output"
  61
  62
  63 /* keyword codes */
  64
  65 #define TOKEN 0
  66 #define LEFT 1
  67 #define RIGHT 2
  68 #define NONASSOC 3
  69 #define MARK 4
  70 #define TEXT 5
  71 #define TYPE 6
  72 #define START 7
  73 #define UNION 8
  74 #define IDENT 9
  75
  76
  77 /*  symbol classes  */
  78
  79 #define UNKNOWN 0
  80 #define TERM 1
  81 #define NONTERM 2
  82
  83
  84 /*  the undefined value  */
  85
  86 #define UNDEFINED (-1)
  87
  88
  89 /*  action codes  */
  90
  91 #define SHIFT 1
  92 #define REDUCE 2
  93
  94
  95 /*  character macros  */
  96
  97 #define IS_IDENT(c)     (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
  98 #define IS_OCTAL(c)     ((c) >= '0' && (c) <= '7')
  99 #define NUMERIC_VALUE(c)        ((c) - '0')
 100
 101
 102 /*  symbol macros  */
 103
 104 #define ISTOKEN(s)      ((s) < start_symbol)
 105 #define ISVAR(s)        ((s) >= start_symbol)
 106
 107
 108 /*  storage allocation macros  */
 109
 110 #define CALLOC(k,n)     (calloc((unsigned)(k),(unsigned)(n)))
 111 #define FREE(x)         (free((char*)(x)))
 112 #define MALLOC(n)       (malloc((unsigned)(n)))
 113 #define NEW(t)          ((t*)allocate(sizeof(t)))
 114 #define NEW2(n,t)       ((t*)allocate((unsigned)((n)*sizeof(t))))
 115 #define REALLOC(p,n)    (realloc((char*)(p),(unsigned)(n)))
 116
 117
 118 /*  the structure of a symbol table entry  */
 119
 120 typedef struct bucket bucket;
 121 struct bucket
 122 {
 123     struct bucket *link;
 124     struct bucket *next;
 125     char *name;
 126     char *tag;
 127     short value;
 128     short index;
 129     short prec;
 130     char class;
 131     char assoc;
 132 };
 133
 134
 135 /*  the structure of the LR(0) state machine  */
 136
 137 typedef struct core core;
 138 struct core
 139 {
 140     struct core *next;
 141     struct core *link;
 142     short number;
 143     short accessing_symbol;
 144     short nitems;
 145     short items[1];
 146 };
 147
 148
 149 /*  the structure used to record shifts  */
 150
 151 typedef struct shifts shifts;
 152 struct shifts
 153 {
 154     struct shifts *next;
 155     short number;
 156     short nshifts;
 157     short shift[1];
 158 };
 159
 160
 161 /*  the structure used to store reductions  */
 162
 163 typedef struct reductions reductions;
 164 struct reductions
 165 {
 166     struct reductions *next;
 167     short number;
 168     short nreds;
 169     short rules[1];
 170 };
 171
 172
 173 /*  the structure used to represent parser actions  */
 174
 175 typedef struct action action;
 176 struct action
 177 {
 178     struct action *next;
 179     short symbol;
 180     short number;
 181     short prec;
 182     char action_code;
 183     char assoc;
 184     char suppressed;
 185 };
 186
 187
 188 /* global variables */
 189
 190 extern char dflag;
 191 extern char lflag;
 192 extern char rflag;
 193 extern char tflag;
 194 extern char vflag;
 195 extern char *symbol_prefix;
 196
 197 extern char *myname;
 198 extern char *cptr;
 199 extern char *line;
 200 extern int lineno;
 201 extern int outline;
 202
 203 extern char *banner[];
 204 extern char *tables[];
 205 extern char *header[];
 206 extern char *body[];
 207 extern char *trailer[];
 208
 209 extern char *action_file_name;
 210 extern char *code_file_name;
 211 extern char *defines_file_name;
 212 extern char *input_file_name;
 213 extern char *output_file_name;
 214 extern char *text_file_name;
 215 extern char *union_file_name;
 216 extern char *verbose_file_name;
 217
 218 extern FILE *action_file;
 219 extern FILE *code_file;
 220 extern FILE *defines_file;
 221 extern FILE *input_file;
 222 extern FILE *output_file;
 223 extern FILE *text_file;
 224 extern FILE *union_file;
 225 extern FILE *verbose_file;
 226
 227 extern int nitems;
 228 extern int nrules;
 229 extern int nsyms;
 230 extern int ntokens;
 231 extern int nvars;
 232 extern int ntags;
 233
 234 extern char unionized;
 235 extern char line_format[];
 236
 237 extern int   start_symbol;
 238 extern char  **symbol_name;
 239 extern short *symbol_value;
 240 extern short *symbol_prec;
 241 extern char  *symbol_assoc;
 242
 243 extern short *ritem;
 244 extern short *rlhs;
 245 extern short *rrhs;
 246 extern short *rprec;
 247 extern char  *rassoc;
 248
 249 extern short **derives;
 250 extern char *nullable;
 251
 252 extern bucket *first_symbol;
 253 extern bucket *last_symbol;
 254
 255 extern int nstates;
 256 extern core *first_state;
 257 extern shifts *first_shift;
 258 extern reductions *first_reduction;
 259 extern short *accessing_symbol;
 260 extern core **state_table;
 261 extern shifts **shift_table;
 262 extern reductions **reduction_table;
 263 extern unsigned *LA;
 264 extern short *LAruleno;
 265 extern short *lookaheads;
 266 extern short *goto_map;
 267 extern short *from_state;
 268 extern short *to_state;
 269
 270 extern action **parser;
 271 extern int SRtotal;
 272 extern int RRtotal;
 273 extern short *SRconflicts;
 274 extern short *RRconflicts;
 275 extern short *defred;
 276 extern short *rules_used;
 277 extern short nunused;
 278 extern short final_state;
 279
 280 /* global functions */
 281
 282 extern char *allocate();
 283 extern bucket *lookup();
 284 extern bucket *make_bucket();
 285
 286
 287 /* system variables */
 288
 289 extern int errno;
 290
 291
 292 /* system functions */
 293
 294 extern void free();
 295 extern char *calloc();
 296 extern char *malloc();
 297 extern char *realloc();
 298 extern char *strcpy();