crc32c.h

// crc32c.h -- header for crc32c.c
// Copyright (C) 2015 Mark Adler
// See crc32c.c for the license.
 
#include <stdint.h>
 
// Return the CRC-32C of buf[0..len-1] given the starting CRC crc.  This can be
// used to calculate the CRC of a sequence of bytes a chunk at a time, using
// the previously returned crc in the next call.  The first call must be with
// crc == 0.  crc32c() uses the Intel crc32 hardware instruction if available.
uint32_t crc32c(uint32_t crc, void const *buf, size_t len);
 
// crc32c_sw() is the same, but does not use the hardware instruction, even if
// available.
uint32_t crc32c_sw(uint32_t crc, void const *buf, size_t len);