-/* 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.
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 "hash.h"
+
+#include <hash.h>
+#include <quotearg.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
-struct hash_table *muscle_table = NULL;
+static struct hash_table *muscle_table = NULL;
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);
}
+/*-----------------------------------------------------------------.
+| 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)
{
+ /* Initialize the muscle obstack. */
+ obstack_init (&muscle_obstack);
+
muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
- hash_compare_muscles, NULL);
+ hash_compare_muscles, muscle_entry_free);
/* Version and input file. */
- muscle_insert ("version", VERSION);
- muscle_insert ("filename", infile);
-
- /* Types. */
- muscle_insert ("stype", "int");
- 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
-muscle_insert (const char *key, const char *value)
+muscle_insert (char const *key, char const *value)
{
- muscle_entry_t pair = { key, NULL };
- muscle_entry_t *entry = hash_lookup (muscle_table, &pair);
+ muscle_entry probe;
+ muscle_entry *entry;
+
+ probe.key = key;
+ entry = hash_lookup (muscle_table, &probe);
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);
}
+ else
+ free (entry->storage);
entry->value = value;
+ entry->storage = NULL;
}
-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. Abort if muscle_insert was invoked more |
+| recently than muscle_grow for KEY since muscle_find can't return a |
+| char const *. |
+`----------------------------------------------------------------------------*/
+
+char *
muscle_find (const char *key)
{
- muscle_entry_t pair = { key, NULL };
- muscle_entry_t *result = hash_lookup (muscle_table, &pair);
- return result ? result->value : NULL;
+ muscle_entry probe;
+ muscle_entry *result = NULL;
+
+ probe.key = key;
+ result = hash_lookup (muscle_table, &probe);
+ if (result)
+ {
+ aver (result->value == result->storage);
+ return result->storage;
+ }
+ return NULL;
+}
+
+
+/*------------------------------------------------.
+| Output the definition of ENTRY as a m4_define. |
+`------------------------------------------------*/
+
+static inline bool
+muscle_m4_output (muscle_entry *entry, FILE *out)
+{
+ fprintf (out, "m4_define([b4_%s],\n", entry->key);
+ 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. |
+`----------------------------------------------------------------*/
+
+void
+muscles_m4_output (FILE *out)
+{
+ hash_do_for_each (muscle_table, muscle_m4_output_processor, out);
}
projects / bison.git / blobdiff