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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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swab(3) Library Functions Manual swab(3)
swab - swap adjacent bytes
Standard C library (libc, -lc)
#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);
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.)
The swab() function returns no value.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├─────────────────────────────────────┼───────────────┼─────────┤
│ swab() │ Thread safety │ MT-Safe │
└─────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
POSIX.1-2001, SVr4, 4.3BSD.
bstring(3)
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Linux man-pages 6.9.1 2024-05-02 swab(3)
Pages that refer to this page: bzero(3), memset(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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