1 files changed, 65 insertions, 0 deletions
diff --git a/include/hash.h b/include/hash.h
new file mode 100644
index 00000000000..c98b0851645
--- /dev/null
+++ b/include/hash.h
@@ -0,0 +1,65 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA */
+
+/* Dynamic hashing of record with different key-length */
+
+#ifndef _hash_h
+#define _hash_h
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef byte *(*hash_get_key)(const byte *,uint*,my_bool);
+typedef void (*hash_free_key)(void *);
+
+  /* flags for hash_init */
+#define HASH_CASE_INSENSITIVE	1
+
+typedef struct st_hash_info {
+  uint next;					/* index to next key */
+  byte *data;					/* data for current entry */
+} HASH_LINK;
+
+typedef struct st_hash {
+  uint key_offset,key_length;		/* Length of key if const length */
+  uint records,blength,current_record;
+  uint flags;
+  DYNAMIC_ARRAY array;				/* Place for hash_keys */
+  hash_get_key get_key;
+  void (*free)(void *);
+  uint (*calc_hashnr)(const byte *key,uint length);
+} HASH;
+
+my_bool hash_init(HASH *hash,uint default_array_elements, uint key_offset,
+		  uint key_length, hash_get_key get_key,
+		  void (*free_element)(void*), uint flags);
+void hash_free(HASH *tree);
+byte *hash_element(HASH *hash,uint idx);
+gptr hash_search(HASH *info,const byte *key,uint length);
+gptr hash_next(HASH *info,const byte *key,uint length);
+my_bool hash_insert(HASH *info,const byte *data);
+my_bool hash_delete(HASH *hash,byte *record);
+my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length);
+my_bool hash_check(HASH *hash);			/* Only in debug library */
+
+#define hash_clear(H) bzero((char*) (H),sizeof(*(H)))
+#define hash_inited(H) ((H)->array.buffer != 0)
+
+#ifdef	__cplusplus
+}
+#endif
+#endif