WCSNCMP
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
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
wcsncmp
--- compare part of two wide-character strings
SYNOPSIS
#include <wchar.h>
int wcsncmp(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
wcsncmp()
function shall compare not more than
n
wide-character codes (wide-character codes that follow a null
wide-character code are not compared) from the array pointed to by
ws1
to the array pointed to by
ws2.
The sign of a non-zero return value shall be determined by the sign of
the difference between the values of the first pair of wide-character
codes that differ in the objects being compared.
RETURN VALUE
Upon successful completion,
wcsncmp()
shall return an integer greater than, equal to, or less than 0, if the
possibly null-terminated array pointed to by
ws1
is greater than, equal to, or less than the possibly null-terminated
array pointed to by
ws2,
respectively.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
wcscasecmp(),
wcscmp()
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 .