WMEMCMP
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Index
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PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
wmemcmp
--- compare wide characters in memory
SYNOPSIS
#include <wchar.h>
int wmemcmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
DESCRIPTION
The functionality described on this reference page is aligned with the
ISO C standard. Any conflict between the requirements described here and the
ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.
The
wmemcmp()
function shall compare the first
n
wide characters of the object pointed to by
ws1
to the first
n
wide characters of the object pointed to by
ws2.
This function shall not be affected by locale and all
wchar_t
values shall be treated identically. The null wide character and
wchar_t
values not corresponding to valid characters shall not be treated
specially.
If
n
is zero, the application shall ensure that
ws1
and
ws2
are valid pointers, and the function shall behave as if the two
objects compare equal.
RETURN VALUE
The
wmemcmp()
function shall return an integer greater than, equal to, or less than
zero, respectively, as the object pointed to by
ws1
is greater than, equal to, or less than the object pointed to by
ws2.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
wmemchr(),
wmemcpy(),
wmemmove(),
wmemset()
The Base Definitions volume of POSIX.1-2017,
<wchar.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
In the event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear
in this page are most likely
to have been introduced during the conversion of the source files to
man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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