for (i = y; i < (y + height); i++)
        memcpy((unsigned char *)pd->efl.m + pd->gs.stride * i + x * 4,
               pd->gs.image + pd->gs.stride * i + x * 4,
               width * 4);

Line 3: error: expected identifier or '(' before 'for'
Line 3: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
Line 3: error: expected '=', ',', ';', 'asm' or '__attribute__' before '++' token