1unsigned 2good (unsigned src, unsigned o5, unsigned w5) 3{ 4 return src & ~((w5 == 0) ? (~0 << o5) : (1 << o5)); 5} 6 7unsigned 8bad (unsigned src, unsigned o5, unsigned w5) 9{ 10 return src & ((w5 == 0) ? ~(~0 << o5) : ~(1 << o5)); 11} 12 13