2017-05-26 04:48:44 +08:00
|
|
|
/*
|
|
|
|
|
Copyright (c) 2013 - 2014 Mark Adler, Robert Vazan
|
|
|
|
|
|
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
|
|
|
warranty. In no event will the author be held liable for any damages
|
|
|
|
|
arising from the use of this software.
|
|
|
|
|
|
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
|
|
|
including commercial applications, and to alter it and redistribute it
|
|
|
|
|
freely, subject to the following restrictions:
|
|
|
|
|
|
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
|
|
|
claim that you wrote the original software. If you use this software
|
|
|
|
|
in a product, an acknowledgment in the product documentation would be
|
|
|
|
|
appreciated but is not required.
|
|
|
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
|
|
|
misrepresented as being the original software.
|
|
|
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
THIS CODE HAS BEEN ALTERED FROM THE ORIGINAL
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef CRC32C_H
|
|
|
|
|
#define CRC32C_H
|
|
|
|
|
|
|
|
|
|
#include <stdint.h>
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
Computes CRC-32C using Castagnoli polynomial of 0x82f63b78.
|
|
|
|
|
This polynomial is better at detecting errors than the more common CRC-32 polynomial.
|
|
|
|
|
CRC-32C is implemented in hardware on newer Intel processors.
|
|
|
|
|
This function will use the hardware if available and fall back to fast software implementation.
|
|
|
|
|
*/
|
|
|
|
|
extern "C" uint32_t crc32c_append(
|
2021-03-11 02:06:03 +08:00
|
|
|
uint32_t crc, // initial CRC, typically 0, may be used to accumulate CRC from multiple buffers
|
|
|
|
|
const uint8_t* input, // data to be put through the CRC algorithm
|
|
|
|
|
size_t length); // length of the data in the input buffer
|
2017-05-26 04:48:44 +08:00
|
|
|
|
|
|
|
|
#endif
|
