NAME

       wcsncasecmp - compare two fixed-size wide-character strings, ignoring case

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wchar.h>

       int wcsncasecmp(const wchar_t s1[.n], const wchar_t s2[.n], size_t n);

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

       wcsncasecmp():
           Since glibc 2.10:
               _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 since glibc 2.1.

ATTRIBUTES

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

       ┌────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │Interface                                               │ Attribute     │ Value          │
       ├────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │wcsncasecmp()                                           │ Thread safety │ MT-Safe locale │
       └────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       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)