Man page - swab(3)

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Manual

swab

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

NAME

swab - swap adjacent bytes

LIBRARY

Standard C library ( libc , -lc )

SYNOPSIS

#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <unistd.h>

void swab(const void from [restrict . n ], void to [restrict . n ],
ssize_t n );

DESCRIPTION

The swab () function copies n bytes from the array pointed to by from to the array pointed to by to , exchanging adjacent even and odd bytes. This function is used to exchange data between machines that have different low/high byte ordering.

This function does nothing when n is negative. When n is positive and odd, it handles n-1 bytes as above, and does something unspecified with the last byte. (In other words, n should be even.)

RETURN VALUE

The swab () function returns no value.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes (7).

Image grohtml-279075-1.png

STANDARDS

POSIX.1-2008.

HISTORY

POSIX.1-2001, SVr4, 4.3BSD.

SEE ALSO

bstring (3)