60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
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/*
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This file is part of VK/KittenPHP-DB-Engine Library.
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VK/KittenPHP-DB-Engine Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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VK/KittenPHP-DB-Engine Library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with VK/KittenPHP-DB-Engine Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2009-2012 Vkontakte Ltd
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2009-2012 Nikolai Durov
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2009-2012 Andrei Lopatin
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2012 Anton Maydell
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*/
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#ifndef __CRC32_H__
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#define __CRC32_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern unsigned int crc32_table[256];
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unsigned crc32_partial (const void *data, int len, unsigned crc);
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//unsigned crc32_partial_fast (const void *data, int len, unsigned crc);
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//unsigned crc32_partial_fastest (const void *data, int len, unsigned crc);
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unsigned compute_crc32 (const void *data, int len);
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unsigned compute_crc32_combine (unsigned crc1, unsigned crc2, int len2);
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extern unsigned long long crc64_table[256];
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unsigned long long crc64_partial (const void *data, int len, unsigned long long crc);
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unsigned long long crc64 (const void *data, int len);
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//unsigned gf32_matrix_times (unsigned *matrix, unsigned vector);
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/* crc32_check_and_repair returns
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0 : Cyclic redundancy check is ok
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1 : Cyclic redundancy check fails, but we fix one bit in input
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2 : Cyclic redundancy check fails, but we fix one bit in input_crc32
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-1 : Cyclic redundancy check fails, no repair possible.
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In this case *input_crc32 will be equal crc32 (input, l)
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Case force_exit == 1 (case 1, 2: kprintf call, case -1: assert fail).
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*/
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int crc32_check_and_repair (void *input, int l, unsigned *input_crc32, int force_exit);
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#ifdef __cplusplus
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}
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#endif
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#endif
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