* doc/bison.texinfo (Stack Overflow): xref to Recursion.

[bison.git] / src / muscle_tab.c

diff --git a/src/muscle_tab.c b/src/muscle_tab.c
index 4330291668b86153840ae3477edf3a023feef112..895e2e3e184f899f8b436f5996eac3633367da33 100644 (file)
--- a/src/muscle_tab.c
+++ b/src/muscle_tab.c
@@ -1,5 +1,5 @@
 /* Macro table manager for Bison,
 /* Macro table manager for Bison,

-   Copyright 2001 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -24,38 +24,49 @@
 #include "muscle_tab.h"
 #include "getargs.h"
 
 #include "muscle_tab.h"
 #include "getargs.h"
 

-struct hash_table muscle_table;

 
 

-static unsigned long
-mhash1 (const void *item)
-{
-  return_STRING_HASH_1 (((const muscle_entry_t *) item)->key);
-}
+/* An obstack used to create some entries.  */
+struct obstack muscle_obstack;
+
+/* Initial capacity of muscles hash table.  */
+#define HT_INITIAL_CAPACITY 257
+
+struct hash_table *muscle_table = NULL;

 
 

-static unsigned long
-mhash2 (const void *item)
+static bool
+hash_compare_muscles (void const *x, void const *y)

 {
 {

-  return_STRING_HASH_2 (((const muscle_entry_t *) item)->key);
+  const muscle_entry_t *m1 = x;
+  const muscle_entry_t *m2 = y;
+  return strcmp (m1->key, m2->key) ? FALSE : TRUE;

 }
 
 }
 

-static int
-mcmp (const void *x, const void *y)
+static unsigned int
+hash_muscle (const void *x, unsigned int tablesize)

 {
 {

-  return strcmp (((const muscle_entry_t*) x)->key,
-                ((const muscle_entry_t *) y)->key);
+  const muscle_entry_t *m = x;
+  return hash_string (m->key, tablesize);

 }
 
 }
 

+/*-----------------------------------------------------------------.
+| Create the MUSCLE_TABLE, and initialize it with default values.  |
+| Also set up the MUSCLE_OBSTACK.                                  |
+`-----------------------------------------------------------------*/
+

 void
 muscle_init (void)
 {
 void
 muscle_init (void)
 {

-  hash_init (&muscle_table, MTABSIZE, &mhash1, &mhash2, &mcmp);
+  muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
+                                 hash_compare_muscles, free);

 
   /* Version and input file.  */
   muscle_insert ("version", VERSION);
   muscle_insert ("filename", infile);
 
 
   /* Version and input file.  */
   muscle_insert ("version", VERSION);
   muscle_insert ("filename", infile);
 

+  /* FIXME: there should probably be no default here, only in the
+     skeletons.  */
+

   /* Types.  */
   /* Types.  */

-  muscle_insert ("stype", "int");

   muscle_insert ("ltype", "yyltype");
 
   /* Default #line formatting.  */
   muscle_insert ("ltype", "yyltype");
 
   /* Default #line formatting.  */


@@ -67,21 +78,75 @@ muscle_init (void)
 
   /* C++ macros.  */
   muscle_insert ("name", "Parser");
 
   /* C++ macros.  */
   muscle_insert ("name", "Parser");

+
+  /* Initialize the muscle obstack.  */
+  obstack_init (&muscle_obstack);

 }
 
 }
 

+
+/*------------------------------------------------------------.
+| Free all the memory consumed by the muscle machinery only.  |
+`------------------------------------------------------------*/
+
+void
+muscle_free (void)
+{
+  hash_free (muscle_table);
+  obstack_free (&muscle_obstack, NULL);
+}
+
+
+

 void
 muscle_insert (const char *key, const char *value)
 {
 void
 muscle_insert (const char *key, const char *value)
 {

-  muscle_entry_t *pair = XMALLOC (muscle_entry_t, 1);
-  pair->key = key;
-  pair->value = value;
-  hash_insert (&muscle_table, pair);
+  muscle_entry_t pair;
+  muscle_entry_t *entry = NULL;
+
+  pair.key = key;
+  entry = hash_lookup (muscle_table, &pair);
+
+  if (!entry)
+    {
+      /* First insertion in the hash. */
+      entry = XMALLOC (muscle_entry_t, 1);
+      entry->key = key;
+      hash_insert (muscle_table, entry);
+    }
+  entry->value = value;

 }
 
 const char*
 muscle_find (const char *key)
 {
 }
 
 const char*
 muscle_find (const char *key)
 {

-  muscle_entry_t pair = { key, 0 };
-  muscle_entry_t *result = hash_find_item (&muscle_table, &pair);
-  return result ? result->value : 0;
+  muscle_entry_t pair;
+  muscle_entry_t *result = NULL;
+
+  pair.key = key;
+  result = hash_lookup (muscle_table, &pair);
+  return result ? result->value : NULL;
+}
+
+
+/* Output the definition of all the current muscles into a list of
+   m4_defines.  */
+
+static int
+muscle_m4_output (muscle_entry_t *entry, FILE *out)
+{
+  fprintf (out, "m4_define([b4_%s],\n", entry->key);
+  fprintf (out, "          [[%s]])\n\n\n", entry->value);
+  return 1;
+}
+
+
+/* Output the definition of all the current muscles into a list of
+   m4_defines.  */
+
+void
+muscles_m4_output (FILE *out)
+{
+  hash_do_for_each (muscle_table,
+                   (Hash_processor) muscle_m4_output,
+                   out);

 }
 }