mirror of
https://git.sr.ht/~cismonx/bookmarkfs
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63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/**
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* bookmarkfs/src/hash.h
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*
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* Non-cryptographic hash function.
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* ----
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*
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* Copyright (C) 2024 CismonX <admin@cismon.net>
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*
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* This file is part of BookmarkFS.
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*
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* BookmarkFS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* BookmarkFS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with BookmarkFS. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BOOKMARKFS_HASH_H_
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#define BOOKMARKFS_HASH_H_
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#include <stdint.h>
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#include <sys/uio.h>
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/**
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* Calculate the 64-bit hash for the given input.
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*/
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uint64_t
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hash_digest (
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void const *input,
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size_t len
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);
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/**
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* Like hash_digest(), but takes an array of input buffers.
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*
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* This function does not write to the input buffers.
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*/
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uint64_t
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hash_digestv (
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struct iovec const *bufv,
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int bufcnt
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);
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/**
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* Seed the hash function with the given value.
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* If not called, the seed equals to value 0.
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*
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* All threads share the same seed.
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*/
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void
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hash_seed (
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uint64_t s
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);
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#endif /* !defined(BOOKMARKFS_HASH_H_) */
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