blob: 44eb4dac175d6400c9ec85e63b56631b93778a9f [file] [log] [blame]
/*
* Copyright (c) 2018 Workaround GmbH.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <crc32.h>
u32_t crc32_ieee(const u8_t *data, size_t len)
{
return crc32_ieee_update(0x0, data, len);
}
u32_t crc32_ieee_update(u32_t crc, const u8_t *data, size_t len)
{
crc = ~crc;
for (size_t i = 0; i < len; i++) {
crc = crc ^ data[i];
for (u8_t j = 0; j < 8; j++) {
crc = (crc >> 1) ^ (0xEDB88320 & -(crc & 1));
}
}
return (~crc);
}