NAME

       bswap16,  bswap32,  bswap64,  be16toh,  be32toh,  be64toh,  htobe16,  htobe32, htobe64, htole16, htole32,
       htole64, le16toh, le32toh, le64toh,  be16enc,  be16dec,  be32enc,  be32dec,  be64enc,  be64dec,  le16enc,
       le16dec, le32enc, le32dec, le64enc, le64dec — byte order operations

SYNOPSIS

       #include <sys/endian.h>

       uint16_t
       bswap16(uint16_t int16);

       uint32_t
       bswap32(uint32_t int32);

       uint64_t
       bswap64(uint64_t int64);

       uint16_t
       be16toh(uint16_t big16);

       uint32_t
       be32toh(uint32_t big32);

       uint64_t
       be64toh(uint64_t big64);

       uint16_t
       htobe16(uint16_t host16);

       uint32_t
       htobe32(uint32_t host32);

       uint64_t
       htobe64(uint64_t host64);

       uint16_t
       htole16(uint16_t host16);

       uint32_t
       htole32(uint32_t host32);

       uint64_t
       htole64(uint64_t host64);

       uint16_t
       le16toh(uint16_t little16);

       uint32_t
       le32toh(uint32_t little32);

       uint64_t
       le64toh(uint64_t little64);

       uint16_t
       be16dec(const void *);

       uint32_t
       be32dec(const void *);

       uint64_t
       be64dec(const void *);

       uint16_t
       le16dec(const void *);

       uint32_t
       le32dec(const void *);

       uint64_t
       le64dec(const void *);

       void
       be16enc(void *, uint16_t);

       void
       be32enc(void *, uint32_t);

       void
       be64enc(void *, uint64_t);

       void
       le16enc(void *, uint16_t);

       void
       le32enc(void *, uint32_t);

       void
       le64enc(void *, uint64_t);

DESCRIPTION

       The  bswap16(),  bswap32(),  and  bswap64() functions return a byte order swapped integer.  On big endian
       systems, the number is converted to little endian byte order.  On little endian systems,  the  number  is
       converted to big endian byte order.

       The  be16toh(),  be32toh(), and be64toh() functions return a big endian byte ordered integer converted to
       the system's native byte order.  The return value will be the same as the argument on big endian systems.

       The le16toh(), le32toh(), and le64toh() functions return a little endian byte ordered  integer  converted
       to  the  system's  native byte order.  The return value will be the same as the argument on little endian
       systems.

       The htobe16(), htobe32(), and htobe64() functions return an integer in the  system's  native  byte  order
       converted  to  big  endian  byte  order.  The return value will be the same as the argument on big endian
       systems.

       The htole16(), htole32(), and htole64() functions return a integer in  the  system's  native  byte  order
       converted  to  little  endian  byte  order.   The return value will be the same as the argument on little
       endian systems.

       The be16enc(), be16dec(), be32enc(), be32dec(), be64enc(), be64dec(),  le16enc(),  le16dec(),  le32enc(),
       le32dec(),  le64enc(),  and  le64dec()  functions  encode and decode integers to/from byte strings on any
       alignment in big/little endian format.

SEE ALSO

       byteorder(3)

HISTORY

       The hto*() and *toh() functions first appeared in FreeBSD 5.0,  and  were  originally  developed  by  the
       NetBSD project.

       The encode/decode functions first appeared in FreeBSD 5.1.

Debian                                           April 29, 2002                                     BYTEORDER(9)