Initial import of hash_table.

This is entirely written by myself, with the exception of the
hash_sizes[] contents which come from the hash_table implementation in
nickle, which I decided to not use.

1 files changed, 59 insertions, 0 deletions

diff --git a/hash_table.h b/hash_table.h
new file mode 100644
index 0000000..0d7afee
--- /dev/null
+++ b/hash_table.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <inttypes.h>
+
+struct hash_entry {
+	uint32_t hash;
+	const void *key;
+	void *data;
+};
+
+struct hash_table {
+	struct hash_entry *table;
+	uint32_t (*hash_function)(const void *key);
+	int (*key_equals_function)(const void *a, const void *b);
+	uint32_t size;
+	uint32_t rehash;
+	uint32_t max_entries;
+	uint32_t size_index;
+	uint32_t entries;
+};
+
+struct hash_table *hash_table_create(uint32_t (*hash_function)(const void *key),
+				     int (*key_equals_function)(const void *a,
+								const void *b));
+void hash_table_destroy(struct hash_table *ht,
+			void (*delete_function)(struct hash_entry *entry));
+
+struct hash_entry *hash_table_insert(struct hash_table *ht, const void *key,
+				     void *data);
+struct hash_entry *hash_table_search(struct hash_table *ht, const void *key);
+
+void hash_table_delete_entry(struct hash_table *ht, struct hash_entry *entry);
+struct hash_entry *hash_table_next_entry(struct hash_table *ht,
+					 struct hash_entry *entry);