wcscasecmp - Man Page

compare two wide-character strings, ignoring case


Standard C library (libc, -lc)


#include <wchar.h>

int wcscasecmp(const wchar_t *s1, const wchar_t *s2);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):


    Since glibc 2.10:
        _POSIX_C_SOURCE >= 200809L
    Before glibc 2.10:


The wcscasecmp() function is the wide-character equivalent of the strcasecmp(3) function. It compares the wide-character string pointed to by s1 and the wide-character string pointed to by s2, ignoring case differences (towupper(3), towlower(3)).

Return Value

The wcscasecmp() function returns zero if the wide-character strings at s1 and s2 are equal except for case distinctions. It returns a positive integer if s1 is greater than s2, ignoring case. It returns a negative integer if s1 is smaller than s2, ignoring case.


The wcscasecmp() function is provided since glibc 2.1.


For an explanation of the terms used in this section, see attributes(7).

wcscasecmp()Thread safetyMT-Safe locale


POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely available on other systems.


The behavior of wcscasecmp() depends on the LC_CTYPE category of the current locale.

See Also

strcasecmp(3), wcscmp(3)

Referenced By

strcasecmp(3), wcscmp(3).

2022-12-15 Linux man-pages 6.02