mirror of
https://github.com/HarbourMasters/Shipwright.git
synced 2024-11-01 16:15:07 -04:00
23 lines
353 B
C
23 lines
353 B
C
|
#pragma once
|
||
|
|
||
|
static uint32_t CRC32B(unsigned char* message, int32_t size)
|
||
|
{
|
||
|
int32_t byte, crc;
|
||
|
int32_t mask;
|
||
|
|
||
|
crc = 0xFFFFFFFF;
|
||
|
|
||
|
for (int32_t i = 0; i < size; i++)
|
||
|
{
|
||
|
byte = message[i];
|
||
|
crc = crc ^ byte;
|
||
|
|
||
|
for (int32_t j = 7; j >= 0; j--)
|
||
|
{
|
||
|
mask = -(crc & 1);
|
||
|
crc = (crc >> 1) ^ (0xEDB88320 & mask);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return ~(uint32_t)(crc);
|
||
|
}
|