src/macrotab.c

   1 /* Macro table manager for Bison,
   2    Copyright 1984, 1989, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <string.h>
  22
  23 #include "xalloc.h"
  24 #include "system.h"
  25 #include "hash.h"
  26 #include "files.h"
  27 #include "macrotab.h"
  28
  29 struct hash_table macro_table;
  30
  31 static unsigned long
  32 mhash1 (const void *item)
  33 {
  34   return_STRING_HASH_1 (((macro_entry_t *) item)->key);
  35 }
  36
  37 static unsigned long
  38 mhash2 (const void *item)
  39 {
  40   return_STRING_HASH_2 (((macro_entry_t *) item)->key);
  41 }
  42
  43 static int
  44 mcmp (const void *x, const void *y)
  45 {
  46   return strcmp (((macro_entry_t*) x)->key, ((macro_entry_t *) y)->key);
  47 }
  48
  49 void
  50 macro_init (void)
  51 {
  52   hash_init (&macro_table, MTABSIZE, &mhash1, &mhash2, &mcmp);
  53
  54   /* Version and input file.  */
  55   macro_insert ("version", VERSION);
  56   macro_insert ("filename", "a.y");
  57
  58   /* Types.  */
  59   macro_insert ("stype", "int");
  60   macro_insert ("ltype", "yyltype");
  61
  62   /* Tokens.  */
  63   macro_insert ("tokendef", "");
  64
  65   /* Tables.  */
  66   macro_insert ("rhs", "0");
  67   macro_insert ("pact", "0");
  68   macro_insert ("prhs", "0");
  69   macro_insert ("stos", "0");
  70   macro_insert ("check", "0");
  71   macro_insert ("pgoto", "0");
  72   macro_insert ("table", "0");
  73   macro_insert ("tname", "0");
  74   macro_insert ("defact", "0");
  75   macro_insert ("toknum", "0");
  76   macro_insert ("defgoto", "0");
  77   macro_insert ("translate", "0");
  78
  79   /* Various macros.  */
  80   macro_insert ("flag", "0");
  81   macro_insert ("last", "0");
  82   macro_insert ("pure", "0");
  83   macro_insert ("nsym", "0");
  84   macro_insert ("debug", "0");
  85   macro_insert ("final", "0");
  86   macro_insert ("maxtok", "0");
  87   macro_insert ("ntbase", "0");
  88   macro_insert ("verbose", "0");
  89   macro_insert ("prefix", "yy");
  90
  91   /* No parser macros.  */
  92   macro_insert ("nnts", "0");
  93   macro_insert ("nrules", "0");
  94   macro_insert ("nstates", "0");
  95   macro_insert ("ntokens", "0");
  96
  97   /* Stack parameters.  */
  98   macro_insert ("maxdepth", "10000");
  99   macro_insert ("initdepth", "200");
 100
 101   /* C++ macros.  */
 102   macro_insert ("name", "Parser");
 103 }
 104
 105 void
 106 macro_insert (const char *key, const char *value)
 107 {
 108   macro_entry_t *pair = XMALLOC (macro_entry_t, 1);
 109   pair->key = key;
 110   pair->value = value;
 111   hash_insert (&macro_table, pair);
 112 }
 113
 114 const char*
 115 macro_find (const char *key)
 116 {
 117   macro_entry_t pair = { key, 0 };
 118   macro_entry_t *result = hash_find_item (&macro_table, &pair);
 119   return result ? result->value : 0;
 120 }