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