From e17b0446bd815f7b25f5bf0b838ef3d02d4eb64e Mon Sep 17 00:00:00 2001 From: Allan McRae Date: Fri, 7 Jan 2011 00:32:17 +1000 Subject: Add a hash table for holding packages Signed-off-by: Allan McRae --- lib/libalpm/pkghash.h | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 lib/libalpm/pkghash.h (limited to 'lib/libalpm/pkghash.h') diff --git a/lib/libalpm/pkghash.h b/lib/libalpm/pkghash.h new file mode 100644 index 00000000..7f90cb17 --- /dev/null +++ b/lib/libalpm/pkghash.h @@ -0,0 +1,58 @@ +/* + * pkghash.h + * + * Copyright (c) 2011 Pacman Development Team + * + * 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 . + */ + +#ifndef _ALPM_PKGHASH_H +#define _ALPM_PKGHASH_H + +#include + +#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 */ -- cgit v1.2.3-24-g4f1b