Initial commit of some stuff written so far. Still in state of flux. Expect

breakage and major changes.

1 files changed, 55 insertions, 0 deletions

diff --git a/src/apk_hash.h b/src/apk_hash.h
new file mode 100644
index 0000000..f2f4ced
--- /dev/null
+++ b/src/apk_hash.h
@@ -0,0 +1,55 @@
+/* apk_hash.h - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation. See http://www.gnu.org/ for details.
+ */
+
+#ifndef APK_HASH_H
+#define APK_HASH_H
+
+#include <malloc.h>
+#include "apk_defines.h"
+
+typedef void *apk_hash_item;
+typedef const void *apk_hash_key;
+
+typedef unsigned long (*apk_hash_f)(apk_hash_key);
+typedef int (*apk_hash_compare_f)(apk_hash_key, apk_hash_key);
+typedef void (*apk_hash_delete_f)(apk_hash_item);
+typedef int (*apk_hash_enumerator_f)(apk_hash_item, void *ctx);
+
+struct apk_hash_ops {
+	ptrdiff_t	node_offset;
+	apk_hash_key	(*get_key)(apk_hash_item item);
+	unsigned long	(*hash_key)(apk_hash_key key);
+	int		(*compare)(apk_hash_key key, apk_hash_key item);
+	void		(*delete_item)(apk_hash_item item);
+};
+
+typedef struct hlist_node apk_hash_node;
+APK_ARRAY(apk_hash_array, struct hlist_head);
+
+struct apk_hash {
+	const struct apk_hash_ops *ops;
+	struct apk_hash_array *buckets;
+	int num_items;
+};
+
+unsigned long apk_hash_string(const char *string);
+unsigned long apk_hash_csum(const void *);
+
+void apk_hash_init(struct apk_hash *h, const struct apk_hash_ops *ops,
+		   int num_buckets);
+void apk_hash_free(struct apk_hash *h);
+
+int apk_hash_foreach(struct apk_hash *h, apk_hash_enumerator_f e, void *ctx);
+apk_hash_item apk_hash_get(struct apk_hash *h, apk_hash_key key);
+void apk_hash_insert(struct apk_hash *h, apk_hash_item item);
+void apk_hash_delete(struct apk_hash *h, apk_hash_key key);
+
+#endif