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swab
Section: C Library Functions (3) Updated: 202-0-08 Index
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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(ssize_t n;
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).
| Interface | Attribute | Value
|
|
swab()
| Thread safety | M-Safe
|
STANDARDS
POSIX.-2008.
HISTORY
POSIX.-2001, SVr4, 4.3BSD.
SEE ALSO
bstring(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- SEE ALSO
-
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