-/* 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.
#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);
}
projects / bison.git / blobdiff