42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
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/*
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Copyright (c) 2013 - 2014 Mark Adler, Robert Vazan
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the author be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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THIS CODE HAS BEEN ALTERED FROM THE ORIGINAL
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*/
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#ifndef CRC32C_H
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#define CRC32C_H
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#include <stdint.h>
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#include <stdlib.h>
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/*
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Computes CRC-32C using Castagnoli polynomial of 0x82f63b78.
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This polynomial is better at detecting errors than the more common CRC-32 polynomial.
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CRC-32C is implemented in hardware on newer Intel processors.
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This function will use the hardware if available and fall back to fast software implementation.
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*/
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extern "C" uint32_t crc32c_append(
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uint32_t crc, // initial CRC, typically 0, may be used to accumulate CRC from multiple buffers
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const uint8_t *input, // data to be put through the CRC algorithm
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size_t length); // length of the data in the input buffer
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#endif
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