52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TDENGINE_HASHUTIL_H
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#define TDENGINE_HASHUTIL_H
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#include "os.h"
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typedef uint32_t (*_hash_fn_t)(const char *, uint32_t);
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typedef int32_t (*_equal_fn_t)(const void *a, const void *b, size_t sz);
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/**
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* murmur hash algorithm
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* @key usually string
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* @len key length
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* @seed hash seed
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* @out an int32 value
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*/
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uint32_t MurmurHash3_32(const char *key, uint32_t len);
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/**
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*
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* @param key
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* @param len
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* @return
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*/
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uint32_t taosIntHash_32(const char *key, uint32_t len);
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uint32_t taosIntHash_64(const char *key, uint32_t len);
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int32_t taosFloatEqual(const void *a, const void *b, size_t sz);
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int32_t taosDoubleEqual(const void *a,const void *b, size_t sz);
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_hash_fn_t taosGetDefaultHashFunction(int32_t type);
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_equal_fn_t taosGetDefaultEqualFunction(int32_t type);
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#endif //TDENGINE_HASHUTIL_H
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