ref: 5cdc17dc795e0a21486c97b5a34c8dff4bd60444
dir: /include/ext4_hash.h/
/* * Copyright (c) 2013 Grzegorz Kostka ([email protected]) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup lwext4 * @{ */ /** * @file ext4_hash.h * @brief Directory indexing hash functions. */ #ifndef EXT4_HASH_H_ #define EXT4_HASH_H_ #ifdef __cplusplus extern "C" { #endif #include "ext4_config.h" #include <stdint.h> struct ext4_hash_info { uint32_t hash; uint32_t minor_hash; uint32_t hash_version; const uint32_t *seed; }; /**@brief Directory entry name hash function. * @param name entry name * @param len entry name length * @param hash_seed (from superblock) * @param hash version (from superblock) * @param hash_minor output value * @param hash_major output value * @return standard error code*/ int ext2_htree_hash(const char *name, int len, const uint32_t *hash_seed, int hash_version, uint32_t *hash_major, uint32_t *hash_minor); #ifdef __cplusplus } #endif #endif /* EXT4_HASH_H_ */ /** * @} */