SWAB(3) Library Functions Manual SWAB(3)

NAME

swab — swap bytes

SYNOPSIS

[XSI]
#include <unistd.h>

void swab(const void *restrict src, void *restrict dest,
       ssize_t nbytes);

DESCRIPTION

The swab () function shall copy nbytes bytes, which are pointed to by src, to the object pointed to by dest, exchanging adjacent bytes. The nbytes argument should be even. If nbytes is odd, swab () copies and exchanges nbytes -1 bytes and the disposition of the last byte is unspecified. If copying takes place between objects that overlap, the behavior is undefined. If nbytes is negative, swab () does nothing.