请大牛看看，这个怎么转成golang代码

这个怎么转成golang代码 static const unsigned long crctable[20] = { 0x00000000, 0x77073096, 0xee0e612c, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, } ; unsigned long crc32(unsigned long crc, unsigned char *buf, int len) { if ((len) && (buf != NULL)) { do { crc = ((crc >> 8) & 0xFFFFFF) ^ crctable[(unsigned char)( (crc & 0xff) ^ *(buf++))]; } while (--len); } crc = crc ^ 0xffffffff; return crc; } int main(int argc,char *argv[]){ unsigned char c[] = {'a','b','c','d'}; unsigned long k = 0xFFFFFFFF; unsigned long a = crc32(k,c,sizeof(c)/sizeof(char)); printf("%8x",a); //８位十六进制CRC32字符串 char crcvalue[8] = {8}; sprintf(crcvalue, “%0x”, a); //转换成十六进制字符串 }