src/muscle_tab.c

   1 /* Macro table manager for Bison,
   2    Copyright (C) 2001, 2002 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 "system.h"
  22 #include "hash.h"
  23 #include "files.h"
  24 #include "muscle_tab.h"
  25 #include "getargs.h"
  26
  27 /* Initial capacity of muscles hash table.  */
  28 #define HT_INITIAL_CAPACITY 257
  29
  30 struct hash_table *muscle_table = NULL;
  31
  32 static bool
  33 hash_compare_muscles (void const *x, void const *y)
  34 {
  35   const muscle_entry_t *m1 = x;
  36   const muscle_entry_t *m2 = y;
  37   return strcmp (m1->key, m2->key) ? FALSE : TRUE;
  38 }
  39
  40 static unsigned int
  41 hash_muscle (const void *x, unsigned int tablesize)
  42 {
  43   const muscle_entry_t *m = x;
  44   return hash_string (m->key, tablesize);
  45 }
  46
  47 void
  48 muscle_init (void)
  49 {
  50   muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
  51                                   hash_compare_muscles, NULL);
  52
  53   /* Version and input file.  */
  54   muscle_insert ("version", VERSION);
  55   muscle_insert ("filename", infile);
  56
  57   /* Types.  */
  58   muscle_insert ("stype", "int");
  59   muscle_insert ("ltype", "yyltype");
  60
  61   /* Default #line formatting.  */
  62   muscle_insert ("linef", "#line %d %s\n");
  63
  64   /* Stack parameters.  */
  65   muscle_insert ("maxdepth", "10000");
  66   muscle_insert ("initdepth", "200");
  67
  68   /* C++ macros.  */
  69   muscle_insert ("name", "Parser");
  70 }
  71
  72 void
  73 muscle_insert (const char *key, const char *value)
  74 {
  75   muscle_entry_t pair = { key, NULL };
  76   muscle_entry_t *entry = hash_lookup (muscle_table, &pair);
  77
  78   if (!entry)
  79     {
  80       /* First insertion in the hash. */
  81       entry = XMALLOC (muscle_entry_t, 1);
  82       entry->key = key;
  83       hash_insert (muscle_table, entry);
  84     }
  85   entry->value = value;
  86 }
  87
  88 const char*
  89 muscle_find (const char *key)
  90 {
  91   muscle_entry_t pair = { key, NULL };
  92   muscle_entry_t *result = hash_lookup (muscle_table, &pair);
  93   return result ? result->value : NULL;
  94 }
  95
  96
  97 /* Output the definition of all the current muscles into a list of
  98    m4_defines.  */
  99
 100 static int
 101 muscle_m4_output (muscle_entry_t *entry, FILE *out)
 102 {
 103   fprintf (out, "m4_define([b4_%s],\n", entry->key);
 104   fprintf (out, "          [[%s]])\n\n\n", entry->value);
 105   return 1;
 106 }
 107
 108
 109 /* Output the definition of all the current muscles into a list of
 110    m4_defines.  */
 111
 112 void
 113 muscles_m4_output (FILE *out)
 114 {
 115   hash_do_for_each (muscle_table,
 116                     (Hash_processor) muscle_m4_output,
 117                     out);
 118 }