--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hash.h	Mon Aug 13 11:28:15 2007 +0200
@@ -0,0 +1,81 @@
+/* This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: Not in FSF. */
+
+#ifndef _HASH_H_
+#define _HASH_H_
+
+typedef struct
+{
+  CONST void *key;
+  void	     *contents;
+} hentry;
+
+typedef int           (*hash_table_test_function) (CONST void *, CONST void *);
+typedef unsigned long (*hash_table_hash_function) (CONST void *);
+typedef size_t hash_size_t;
+
+struct hash_table
+{
+  hentry	*harray;
+  long		zero_set;
+  void		*zero_entry;
+  hash_size_t	size;		/* size of the hasharray */
+  hash_size_t	fullness;	/* number of entries in the hash table */
+  hash_table_hash_function hash_function;
+  hash_table_test_function test_function;
+};
+
+/* SIZE is the number of initial entries. The hash table will be grown
+   automatically if the number of entries approaches the size */
+struct hash_table *make_hash_table (hash_size_t size);
+
+struct hash_table *
+make_general_hash_table (hash_size_t size,
+			hash_table_hash_function hash_function,
+			hash_table_test_function test_function);
+
+/* Clear HASH-TABLE. A freshly created hash table is already cleared up. */
+void clrhash (struct hash_table *hash_table);
+
+/* Free HASH-TABLE and its substructures */
+void free_hash_table (struct hash_table *hash_table);
+
+/* Returns a hentry whose key is 0 if the entry does not exist in HASH-TABLE */
+CONST void *gethash (CONST void *key, struct hash_table *hash_table,
+		     CONST void **ret_value);
+
+/* KEY should be different from 0 */
+void puthash (CONST void *key, void *contents, struct hash_table *hash_table);
+
+/* delete the entry with key KEY */
+void remhash (CONST void *key, struct hash_table *hash_table);
+
+typedef int (*maphash_function) (CONST void* key, void* contents, void* arg);
+
+typedef int (*remhash_predicate) (CONST void* key, CONST void* contents,
+                                  void* arg);
+
+/* Call MF (key, contents, arg) for every entry in HASH-TABLE */
+void maphash (maphash_function mf, struct hash_table *hash_table, void* arg);
+
+/* Delete all objects from HASH-TABLE satisfying PREDICATE */
+void map_remhash (remhash_predicate predicate,
+		  struct hash_table *hash_table, void *arg);
+
+#endif /* _HASH_H_ */