wcsncasecmp - compare two fixed-size wide-character strings, ignoring case
int wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
- Since glibc 2.10:
- _POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
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
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,
The wcsncasecmp() function is provided in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely
available on other systems.
The behavior of wcsncasecmp() depends on the LC_CTYPE category of
the current locale.
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