X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/5ece6d436f150c8f32f169ba05985fe9f3202f58..5c16c6b13abde53223e256a351401570c2da3b5e:/src/muscle_tab.c

diff --git a/src/muscle_tab.c b/src/muscle_tab.c
index 43302916..b86c09bd 100644
--- a/src/muscle_tab.c
+++ b/src/muscle_tab.c
@@ -1,5 +1,5 @@
-/* Macro table manager for Bison,
-   Copyright 2001 Free Software Foundation, Inc.
+/* Muscle table manager for Bison,
+   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -24,64 +24,189 @@
 #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
 
-static unsigned long
-mhash2 (const void *item)
+struct hash_table *muscle_table = NULL;
+
+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) == 0;
 }
 
-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)
 {
-  hash_init (&muscle_table, MTABSIZE, &mhash1, &mhash2, &mcmp);
+  /* Initialize the muscle obstack.  */
+  obstack_init (&muscle_obstack);
+
+  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);
+  MUSCLE_INSERT_STRING ("version", VERSION);
+  MUSCLE_INSERT_STRING ("filename", infile);
 
-  /* Types.  */
-  muscle_insert ("stype", "int");
-  muscle_insert ("ltype", "yyltype");
+  /* FIXME: there should probably be no default here, only in the
+     skeletons.  */
 
   /* Default #line formatting.  */
-  muscle_insert ("linef", "#line %d %s\n");
+  MUSCLE_INSERT_STRING ("linef", "#line %d %s\n");
+}
+
+
+/*------------------------------------------------------------.
+| Free all the memory consumed by the muscle machinery only.  |
+`------------------------------------------------------------*/
+
+void
+muscle_free (void)
+{
+  hash_free (muscle_table);
+  obstack_free (&muscle_obstack, NULL);
+}
+
 
-  /* Stack parameters.  */
-  muscle_insert ("maxdepth", "10000");
-  muscle_insert ("initdepth", "200");
 
-  /* C++ macros.  */
-  muscle_insert ("name", "Parser");
+/*------------------------------------------------------------.
+| Insert (KEY, VALUE).  If KEY already existed, overwrite the |
+| previous value.                                             |
+`------------------------------------------------------------*/
+
+void
+muscle_insert (const char *key, char *value)
+{
+  muscle_entry_t probe;
+  muscle_entry_t *entry = NULL;
+
+  probe.key = key;
+  entry = hash_lookup (muscle_table, &probe);
+
+  if (!entry)
+    {
+      /* First insertion in the hash. */
+      entry = XMALLOC (muscle_entry_t, 1);
+      entry->key = key;
+      hash_insert (muscle_table, entry);
+    }
+  entry->value = value;
 }
 
+
+/*-------------------------------------------------------------------.
+| Insert (KEY, VALUE).  If KEY already existed, overwrite the        |
+| previous value.  Uses MUSCLE_OBSTACK.  De-allocates the previously |
+| associated value.  VALUE and SEPARATOR are copied.                 |
+`-------------------------------------------------------------------*/
+
 void
-muscle_insert (const char *key, const char *value)
+muscle_grow (const char *key, const char *val, const char *separator)
 {
-  muscle_entry_t *pair = XMALLOC (muscle_entry_t, 1);
-  pair->key = key;
-  pair->value = value;
-  hash_insert (&muscle_table, pair);
+  muscle_entry_t probe;
+  muscle_entry_t *entry = NULL;
+
+  probe.key = key;
+  entry = hash_lookup (muscle_table, &probe);
+
+  if (!entry)
+    {
+      /* First insertion in the hash. */
+      entry = XMALLOC (muscle_entry_t, 1);
+      entry->key = key;
+      hash_insert (muscle_table, entry);
+      entry->value = xstrdup (val);
+    }
+  else
+    {
+      /* Grow the current value. */
+      char *new_val;
+      obstack_sgrow (&muscle_obstack, entry->value);
+      free (entry->value);
+      obstack_sgrow (&muscle_obstack, separator);
+      obstack_sgrow (&muscle_obstack, val);
+      obstack_1grow (&muscle_obstack, 0);
+      new_val = obstack_finish (&muscle_obstack);
+      entry->value = xstrdup (new_val);
+      obstack_free (&muscle_obstack, new_val);
+    }
 }
 
-const char*
+
+/*-------------------------------------------------------------------.
+| MUSCLE is an M4 list of pairs.  Create or extend it with the pair  |
+| (A1, A2).  Note that because the muscle values are output *double* |
+| quoted, one needs to strip the first level of quotes to reach the  |
+| list itself.                                                       |
+`-------------------------------------------------------------------*/
+
+void muscle_pair_list_grow (const char *muscle,
+			    const char *a1, const char *a2)
+{
+  char *pair;
+  obstack_fgrow2 (&muscle_obstack, "[[[%s]], [[%s]]]", a1, a2);
+  obstack_1grow (&muscle_obstack, 0);
+  pair = obstack_finish (&muscle_obstack);
+  muscle_grow (muscle, pair, ",\n");
+  obstack_free (&muscle_obstack, pair);
+}
+
+/*-------------------------------.
+| Find the value of muscle KEY.  |
+`-------------------------------*/
+
+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 probe;
+  muscle_entry_t *result = NULL;
+
+  probe.key = key;
+  result = hash_lookup (muscle_table, &probe);
+  return result ? result->value : NULL;
+}
+
+
+/*------------------------------------------------.
+| Output the definition of ENTRY as a m4_define.  |
+`------------------------------------------------*/
+
+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);
 }