wcscasecmp(3) Library Functions Manual wcscasecmp(3)

wcscasecmp - 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)):

wcscasecmp():

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

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)).

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.

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

Interface Attribute Value
wcscasecmp () Thread safety MT-Safe locale

POSIX.1-2008.

glibc 2.1.

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

strcasecmp(3), wcscmp(3)

2024-05-02 Linux man-pages 6.8