/* An expandable hash tables datatype.
- Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1999-2016 Free Software Foundation, Inc.
Contributed by Vladimir Makarov (vmakarov@cygnus.com).
This program is free software; you can redistribute it and/or modify
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
/* This package implements basic hash table functionality. It is possible
to search for an entry, create an entry and destroy an entry.
#include "ansidecl.h"
-#ifndef GTY
-#define GTY(X)
-#endif
-
/* The type for a hash code. */
typedef unsigned int hashval_t;
Iff it returns NULL, the hash table implementation will pass an error
code back to the user, so if your code doesn't handle errors,
best if you use xcalloc instead. */
-typedef PTR (*htab_alloc) (size_t, size_t);
+typedef void *(*htab_alloc) (size_t, size_t);
/* We also need a free() routine. */
-typedef void (*htab_free) (PTR);
+typedef void (*htab_free) (void *);
/* Memory allocation and deallocation; variants which take an extra
argument. */
-typedef PTR (*htab_alloc_with_arg) (void *, size_t, size_t);
+typedef void *(*htab_alloc_with_arg) (void *, size_t, size_t);
typedef void (*htab_free_with_arg) (void *, void *);
+/* This macro defines reserved value for empty table entry. */
+
+#define HTAB_EMPTY_ENTRY ((PTR) 0)
+
+/* This macro defines reserved value for table entry which contained
+ a deleted element. */
+
+#define HTAB_DELETED_ENTRY ((PTR) 1)
+
/* Hash tables are of the following type. The structure
(implementation) of this type is not needed for using the hash
tables. All work with hash table should be executed only through
functions mentioned below. The size of this structure is subject to
change. */
-struct htab GTY(())
-{
+struct htab {
/* Pointer to hash function. */
htab_hash hash_f;
htab_del del_f;
/* Table itself. */
- PTR * GTY ((use_param, length ("%h.size"))) entries;
+ void **entries;
/* Current size (in entries) of the hash table. */
size_t size;
htab_free free_f;
/* Alternate allocate/free functions, which take an extra argument. */
- PTR GTY((skip)) alloc_arg;
+ void *alloc_arg;
htab_alloc_with_arg alloc_with_arg_f;
htab_free_with_arg free_with_arg_f;
extern htab_t htab_create_alloc_ex (size_t, htab_hash,
htab_eq, htab_del,
- PTR, htab_alloc_with_arg,
+ void *, htab_alloc_with_arg,
htab_free_with_arg);
+extern htab_t htab_create_typed_alloc (size_t, htab_hash, htab_eq, htab_del,
+ htab_alloc, htab_alloc, htab_free);
+
/* Backward-compatibility functions. */
extern htab_t htab_create (size_t, htab_hash, htab_eq, htab_del);
extern htab_t htab_try_create (size_t, htab_hash, htab_eq, htab_del);
extern void htab_set_functions_ex (htab_t, htab_hash,
htab_eq, htab_del,
- PTR, htab_alloc_with_arg,
+ void *, htab_alloc_with_arg,
htab_free_with_arg);
extern void htab_delete (htab_t);
extern void htab_empty (htab_t);
-extern PTR htab_find (htab_t, const void *);
-extern PTR *htab_find_slot (htab_t, const void *, enum insert_option);
-extern PTR htab_find_with_hash (htab_t, const void *, hashval_t);
-extern PTR *htab_find_slot_with_hash (htab_t, const void *,
- hashval_t,
- enum insert_option);
+extern void * htab_find (htab_t, const void *);
+extern void ** htab_find_slot (htab_t, const void *, enum insert_option);
+extern void * htab_find_with_hash (htab_t, const void *, hashval_t);
+extern void ** htab_find_slot_with_hash (htab_t, const void *,
+ hashval_t, enum insert_option);
extern void htab_clear_slot (htab_t, void **);
extern void htab_remove_elt (htab_t, void *);
extern void htab_remove_elt_with_hash (htab_t, void *, hashval_t);
extern htab_eq htab_eq_pointer;
/* A hash function for null-terminated strings. */
-extern hashval_t htab_hash_string (const PTR);
+extern hashval_t htab_hash_string (const void *);
/* An iterative hash function for arbitrary data. */
-extern hashval_t iterative_hash (const PTR, size_t, hashval_t);
+extern hashval_t iterative_hash (const void *, size_t, hashval_t);
/* Shorthand for hashing something with an intrinsic size. */
#define iterative_hash_object(OB,INIT) iterative_hash (&OB, sizeof (OB), INIT)