Don't let Bison leak memory except when it complains.

[bison.git] / src / muscle_tab.c

diff --git a/src/muscle_tab.c b/src/muscle_tab.c
index b556ef73136ba75809ce4651e161481c86751ea4..6ceb71f332debbe5d339ec36771ebfe175d029fb 100644 (file)
--- a/src/muscle_tab.c
+++ b/src/muscle_tab.c
@@ -1,5 +1,7 @@
-/* Macro table manager for Bison,
-   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+/* Muscle table manager for Bison.
+
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+   Foundation, Inc.

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


@@ -15,109 +17,238 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to

-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */

 
 

+#include <config.h>

 #include "system.h"
 #include "system.h"

-#include "hash.h"
+
+#include <hash.h>
+#include <quotearg.h>
+

 #include "files.h"
 #include "muscle_tab.h"
 #include "getargs.h"
 
 #include "files.h"
 #include "muscle_tab.h"
 #include "getargs.h"
 

+/* A key-value pair, along with storage that can be reclaimed when
+   this pair is no longer needed.  */
+typedef struct
+{
+  char const *key;
+  char const *value;
+  char *storage;
+} muscle_entry;
+
+/* An obstack used to create some entries.  */
+struct obstack muscle_obstack;
+

 /* Initial capacity of muscles hash table.  */
 #define HT_INITIAL_CAPACITY 257
 
 /* Initial capacity of muscles hash table.  */
 #define HT_INITIAL_CAPACITY 257
 

-struct hash_table *muscle_table = NULL;
+static struct hash_table *muscle_table = NULL;

 
 static bool
 hash_compare_muscles (void const *x, void const *y)
 {
 
 static bool
 hash_compare_muscles (void const *x, void const *y)
 {

-  const muscle_entry_t *m1 = x;
-  const muscle_entry_t *m2 = y;
-  return strcmp (m1->key, m2->key) ? FALSE : TRUE;
+  muscle_entry const *m1 = x;
+  muscle_entry const *m2 = y;
+  return strcmp (m1->key, m2->key) == 0;

 }
 
 }
 

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

 {
 {

-  const muscle_entry_t *m = x;
+  muscle_entry const *m = x;

   return hash_string (m->key, tablesize);
 }
 
   return hash_string (m->key, tablesize);
 }
 

+/*-----------------------------------------------------------------.
+| Create the MUSCLE_TABLE, and initialize it with default values.  |
+| Also set up the MUSCLE_OBSTACK.                                  |
+`-----------------------------------------------------------------*/
+
+static void
+muscle_entry_free (void *entry)
+{
+  muscle_entry *mentry = entry;
+  free (mentry->storage);
+  free (mentry);
+}
+

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

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

   muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
   muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,

-                                 hash_compare_muscles, NULL);
+                                 hash_compare_muscles, muscle_entry_free);

 
   /* Version and input file.  */
 
   /* Version and input file.  */

-  muscle_insert ("version", VERSION);
-  muscle_insert ("filename", infile);
-
-  /* Types.  */
-  muscle_insert ("ltype", "yyltype");
+  MUSCLE_INSERT_STRING ("version", VERSION);
+  MUSCLE_INSERT_C_STRING ("file_name", grammar_file);
+}

 
 

-  /* Default #line formatting.  */
-  muscle_insert ("linef", "#line %d %s\n");

 
 

-  /* Stack parameters.  */
-  muscle_insert ("maxdepth", "10000");
-  muscle_insert ("initdepth", "200");
+/*------------------------------------------------------------.
+| Free all the memory consumed by the muscle machinery only.  |
+`------------------------------------------------------------*/

 
 

-  /* C++ macros.  */
-  muscle_insert ("name", "Parser");
+void
+muscle_free (void)
+{
+  hash_free (muscle_table);
+  obstack_free (&muscle_obstack, NULL);

 }
 
 }
 

+
+
+/*------------------------------------------------------------.
+| Insert (KEY, VALUE).  If KEY already existed, overwrite the |
+| previous value.                                             |
+`------------------------------------------------------------*/
+

 void
 void

-muscle_insert (const char *key, const char *value)
+muscle_insert (char const *key, char const *value)

 {
 {

-  muscle_entry_t pair;
-  muscle_entry_t *entry = NULL;
+  muscle_entry probe;
+  muscle_entry *entry;

 
 

-  pair.key = key;
-  entry = hash_lookup (muscle_table, &pair);
+  probe.key = key;
+  entry = hash_lookup (muscle_table, &probe);

 
   if (!entry)
     {
       /* First insertion in the hash. */
 
   if (!entry)
     {
       /* First insertion in the hash. */

-      entry = XMALLOC (muscle_entry_t, 1);
+      entry = xmalloc (sizeof *entry);

       entry->key = key;
       hash_insert (muscle_table, entry);
       entry->key = key;
       hash_insert (muscle_table, entry);

+      entry->storage = NULL;

     }
   entry->value = value;
 }
 
     }
   entry->value = value;
 }
 

-const char*
+
+/*-------------------------------------------------------------------.
+| Append VALUE to the current value of KEY.  If KEY did not already  |
+| exist, create it.  Use MUSCLE_OBSTACK.  De-allocate the previously |
+| associated value.  Copy VALUE and SEPARATOR.                       |
+`-------------------------------------------------------------------*/
+
+void
+muscle_grow (const char *key, const char *val, const char *separator)
+{
+  muscle_entry probe;
+  muscle_entry *entry = NULL;
+
+  probe.key = key;
+  entry = hash_lookup (muscle_table, &probe);
+
+  if (!entry)
+    {
+      /* First insertion in the hash. */
+      entry = xmalloc (sizeof *entry);
+      entry->key = key;
+      hash_insert (muscle_table, entry);
+      entry->value = entry->storage = xstrdup (val);
+    }
+  else
+    {
+      /* Grow the current value. */
+      char *new_val;
+      obstack_sgrow (&muscle_obstack, entry->value);
+      free (entry->storage);
+      obstack_sgrow (&muscle_obstack, separator);
+      obstack_sgrow (&muscle_obstack, val);
+      obstack_1grow (&muscle_obstack, 0);
+      new_val = obstack_finish (&muscle_obstack);
+      entry->value = entry->storage = xstrdup (new_val);
+      obstack_free (&muscle_obstack, new_val);
+    }
+}
+
+
+/*------------------------------------------------------------------.
+| Append VALUE to the current value of KEY, using muscle_grow.  But |
+| in addition, issue a synchronization line for the location LOC.   |
+`------------------------------------------------------------------*/
+
+void
+muscle_code_grow (const char *key, const char *val, location loc)
+{
+  char *extension = NULL;
+  obstack_fgrow1 (&muscle_obstack, "]b4_syncline(%d, [[", loc.start.line);
+  MUSCLE_OBSTACK_SGROW (&muscle_obstack,
+                       quotearg_style (c_quoting_style, loc.start.file));
+  obstack_sgrow (&muscle_obstack, "]])[\n");
+  obstack_sgrow (&muscle_obstack, val);
+  obstack_1grow (&muscle_obstack, 0);
+  extension = obstack_finish (&muscle_obstack);
+  muscle_grow (key, extension, "");
+  obstack_free (&muscle_obstack, extension);
+}
+
+
+/*-------------------------------------------------------------------.
+| 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_find (const char *key)
 {

-  muscle_entry_t pair;
-  muscle_entry_t *result = NULL;
+  muscle_entry probe;
+  muscle_entry *result = NULL;

 
 

-  pair.key = key;
-  result = hash_lookup (muscle_table, &pair);
+  probe.key = key;
+  result = hash_lookup (muscle_table, &probe);

   return result ? result->value : NULL;
 }
 
 
   return result ? result->value : NULL;
 }
 
 

-/* Output the definition of all the current muscles into a list of
-   m4_defines.  */
+/*------------------------------------------------.
+| Output the definition of ENTRY as a m4_define.  |
+`------------------------------------------------*/

 
 

-static int
-muscle_m4_output (muscle_entry_t *entry, FILE *out)
+static inline bool
+muscle_m4_output (muscle_entry *entry, FILE *out)

 {
   fprintf (out, "m4_define([b4_%s],\n", entry->key);
 {
   fprintf (out, "m4_define([b4_%s],\n", entry->key);

-  fprintf (out, "          [[%s]])\n\n\n", entry->value);
-  return 1;
+  fprintf (out, "[[%s]])\n\n\n", entry->value);
+  return true;
+}
+
+static bool
+muscle_m4_output_processor (void *entry, void *out)
+{
+  return muscle_m4_output (entry, out);

 }
 
 
 }
 
 

-/* Output the definition of all the current muscles into a list of
-   m4_defines.  */
+/*----------------------------------------------------------------.
+| Output the definition of all the current muscles into a list of |
+| m4_defines.                                                     |
+`----------------------------------------------------------------*/

 
 void
 muscles_m4_output (FILE *out)
 {
 
 void
 muscles_m4_output (FILE *out)
 {

-  hash_do_for_each (muscle_table,
-                   (Hash_processor) muscle_m4_output,
-                   out);
+  hash_do_for_each (muscle_table, muscle_m4_output_processor, out);

 }
 }