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byteorder(3) [freebsd man page]

BYTEORDER(3)						   BSD Library Functions Manual 					      BYTEORDER(3)

NAME
htonl, htons, ntohl, ntohs -- convert values between host and network byte order LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <arpa/inet.h> or #include <netinet/in.h> uint32_t htonl(uint32_t hostlong); uint16_t htons(uint16_t hostshort); uint32_t ntohl(uint32_t netlong); uint16_t ntohs(uint16_t netshort); DESCRIPTION
These routines convert 16 and 32 bit quantities between network byte order and host byte order. On machines which have a byte order which is the same as the network order, routines are defined as null macros. These routines are most often used in conjunction with Internet addresses and ports as returned by gethostbyname(3) and getservent(3). SEE ALSO
gethostbyname(3), getservent(3), byteorder(9) STANDARDS
The byteorder functions conform to IEEE Std 1003.1-2001 (``POSIX.1''). HISTORY
The byteorder functions appeared in 4.2BSD. BUGS
On the VAX bytes are handled backwards from most everyone else in the world. This is not expected to be fixed in the near future. BSD
March 20, 2005 BSD

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BYTEORDER(3)						   BSD Library Functions Manual 					      BYTEORDER(3)

NAME
htonl, htons, ntohl, ntohs -- convert values between host and network byte order LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <arpa/inet.h> uint32_t htonl(uint32_t hostlong); uint16_t htons(uint16_t hostshort); uint32_t ntohl(uint32_t netlong); uint16_t ntohs(uint16_t netshort); DESCRIPTION
These routines convert 16 and 32 bit quantities between network byte order and host byte order. (Network byte order is big endian, or most significant byte first.) On machines which have a byte order which is the same as the network order, routines are defined as null macros. These routines are most often used in conjunction with Internet addresses and ports as returned by gethostbyname(3) and getservent(3). SEE ALSO
gethostbyname(3), getservent(3) STANDARDS
The byteorder functions are expected to conform with IEEE Std POSIX.1-200x (``POSIX.1''). HISTORY
The byteorder functions appeared in 4.2BSD. BUGS
On the VAX bytes are handled backwards from most everyone else in the world. This is not expected to be fixed in the near future. BSD
June 4, 1993 BSD

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