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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:
_XOPEN_SOURCE >= 700 || _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

Multithreading (see pthreads(7) )

The wcsncasecmp() function is thread-safe with exceptions. It can be safely used in multithreaded applications, as long as setlocale(3) is not called to change the locale during its execution.

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)

Colophon

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