The Open Group Base Specifications Issue 7, 2018 edition
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008)
Copyright © 2001-2018 IEEE and The Open GroupA newer edition of this document exists here
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
[CX] ![[Option Start]](../images/opt-start.gif)
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.
![[Option End]](../images/opt-end.gif)
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
XBD <wchar.h>
CHANGE HISTORY
First released in Issue 4. Derived from the MSE working draft.
End of informative text.
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