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:
               _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) func‐
       tion.  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,  trun‐
       cated  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  nega‐
       tive 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 mul‐
       tithreaded 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
       This page is part of release 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



GNU                                         2014-01-22                             WCSNCASECMP(3)