htonl() vs __builtin_bswap32()

Question

__builtin_bswap32() is used to reverse bytes (it\'s used for littel/big endian issues (from gcc)).

htonl() is used to reverse bytes too (conver

Answer 1

bswap_32 always reverse byte order, on any architecture.

htonl/ntohl reverses byteorder on little endian machines only.

For example, on PowerPC (big endian), ntohl/htonl just returns input value, no more, while bswap32 anyway will reverse byte order.