DO1                18 3rdparty/zlib/adler32.c #define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
DO1               200 3rdparty/zlib/crc32.c #define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)