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WCSNCASECMP(3) Linux Programmer's Manual WCSNCASECMP(3)
NAME
wcsncasecmp - compare two fixed-size wide-character strings, ignoring case
SYNOPSIS
#include <wchar.h>
int wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
wcsncasecmp():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
DESCRIPTION
The wcsncasecmp() function is the wide-character equivalent of the strncasecmp(3) function. It compares the wide-character string pointed to by s1 and the wide-
character string pointed to by s2, but at most n wide characters from each string, ignoring case differences (towupper(3), towlower(3)).
RETURN VALUE
The wcsncasecmp() function returns zero if the wide-character strings at s1 and s2, truncated to at most length n, are equal except for case distinctions. It
returns a positive integer if truncated s1 is greater than truncated s2, ignoring case. It returns a negative integer if truncated s1 is smaller than truncated
s2, ignoring case.
VERSIONS
The wcsncasecmp() function is provided in glibc since version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
│wcsncasecmp() │ Thread safety │ MT-Safe locale │
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘
CONFORMING TO
POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely available on other systems.
NOTES
The behavior of wcsncasecmp() depends on the LC_CTYPE category of the current locale.
SEE ALSO
strncasecmp(3), wcsncmp(3)
GNU 2021-03-22 WCSNCASECMP(3)