#include "memory.h"
#include "stdio.h"

typedef unsigned short USHORT;
typedef unsigned int UINT;

UINT CRC_EDB88320(char *buf, int len, UINT init)
{
UINT crc = init;

for (int pos = 0; pos < len; pos++) {

crc ^= (UINT)((unsigned char)(buf[pos]));

for (int i = 8; i != 0; i--) {
if ((crc & 1) != 0) {
crc >>= 1;
crc ^= 0xEDB88320;
}
else
crc >>= 1;
}
}
return crc;
}

int main(int argc, char* argv[])
{
char data[32];
UINT crc;

memcpy( data, "0123456", 7);
printf ("CRC=%08X\n", crc=CRC_EDB88320(data,7,0xFFFFFFFF));
crc = ~crc; memcpy( data+7, &crc, 4);
printf ("CONST=%08X\n", crc=CRC_EDB88320(data,11,0xFFFFFFFF));

memcpy( data, "235547welbxdgu", 14);
printf ("CRC=%08X\n", crc=CRC_EDB88320(data,14,0xFFFFFFFF));
crc=~crc; memcpy( data+14, &crc, 4);
printf ("CONST=%08X\n", crc=CRC_EDB88320(data,18,0xFFFFFFFF));

memcpy( data, "0123456", 7);
printf ("CRC=%08X\n", crc=CRC_EDB88320(data,7,0xFFFFFFFF));
memcpy( data+7, &crc, 4);
printf ("CONST=%08X\n", crc=CRC_EDB88320(data,11,0xFFFFFFFF));

memcpy( data, "235547welbxdgu", 14);
printf ("CRC=%08X\n", crc=CRC_EDB88320(data,14,0xFFFFFFFF));
memcpy( data+14, &crc, 4);
printf ("CONST=%08X\n", crc=CRC_EDB88320(data,18,0xFFFFFFFF));

return 0;
}