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authorDan McGee <dan@archlinux.org>2011-02-04 09:10:25 -0600
committerDan McGee <dan@archlinux.org>2011-02-04 09:10:25 -0600
commite34fc4eddf73f2453b42235f5ae7d65f75db66fc (patch)
tree93b3a31a7db207f70b0a024f4de83ff8e0e3158f /lib/libalpm/pkghash.h
parentc12ccbfb2c7aa907ba01339a1a29089c65ea9911 (diff)
parent6b0d4674bb132b2583920211cc798f3db77ec392 (diff)
Merge remote-tracking branch 'allan/hash'
Diffstat (limited to 'lib/libalpm/pkghash.h')
-rw-r--r--lib/libalpm/pkghash.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/libalpm/pkghash.h b/lib/libalpm/pkghash.h
new file mode 100644
index 00000000..a6c1db71
--- /dev/null
+++ b/lib/libalpm/pkghash.h
@@ -0,0 +1,58 @@
+/*
+ * pkghash.h
+ *
+ * Copyright (c) 2011 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ALPM_PKGHASH_H
+#define _ALPM_PKGHASH_H
+
+#include <stdlib.h>
+
+#include "alpm.h"
+#include "alpm_list.h"
+
+
+/**
+ * @brief A hash table for holding pmpkg_t objects.
+ *
+ * A combination of a hash table and a list, allowing for fast look-up
+ * by package name but also iteration over the packages.
+ */
+struct __pmpkghash_t {
+ /** data held by the hash table */
+ alpm_list_t **hash_table;
+ /** number of buckets in hash table */
+ size_t buckets;
+ /** number of entries in hash table */
+ size_t entries;
+ /** head node of the hash table data in normal list format */
+ alpm_list_t *list;
+};
+
+pmpkghash_t *_alpm_pkghash_create(size_t size);
+
+pmpkghash_t *_alpm_pkghash_add(pmpkghash_t *hash, pmpkg_t *pkg);
+pmpkghash_t *_alpm_pkghash_add_sorted(pmpkghash_t *hash, pmpkg_t *pkg);
+pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t **data);
+
+void _alpm_pkghash_free(pmpkghash_t *hash);
+
+pmpkg_t *_alpm_pkghash_find(pmpkghash_t *hash, const char *name);
+
+#define MAX_HASH_LOAD 0.7
+
+#endif /* _ALPM_PKGHASH_H */