PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

WCSCASECMP(3P)            POSIX Programmer's Manual           WCSCASECMP(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l — case-
       insensitive wide-character string comparison

SYNOPSIS         top

       #include <wchar.h>

       int wcscasecmp(const wchar_t *ws1, const wchar_t *ws2);
       int wcscasecmp_l(const wchar_t *ws1, const wchar_t *ws2,
           locale_t locale);
       int wcsncasecmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
       int wcsncasecmp_l(const wchar_t *ws1, const wchar_t *ws2,
           size_t n, locale_t locale);

DESCRIPTION         top

       The wcscasecmp() and wcsncasecmp() functions are the wide-character
       equivalent of the strcasecmp() and strncasecmp() functions,
       respectively.

       The wcscasecmp() and wcscasecmp_l() functions shall compare, while
       ignoring differences in case, the wide-character string pointed to by
       ws1 to the wide-character string pointed to by ws2.

       The wcsncasecmp() and wcsncasecmp_l() functions shall compare, while
       ignoring differences in case, not more than n wide-characters from
       the wide-character string pointed to by ws1 to the wide-character
       string pointed to by ws2.

       The wcscasecmp() and wcsncasecmp() functions use the current locale
       to determine the case of the wide characters.

       The wcscasecmp_l() and wcsncasecmp_l() functions use the locale
       represented by locale to determine the case of the wide characters.

       When the LC_CTIME category of the locale being used is from the POSIX
       locale, these functions shall behave as if the wide-character strings
       had been converted to lowercase and then a comparison of wide-
       character codes performed.  Otherwise, the results are unspecified.

       The information for wcscasecmp_l() and wcsncasecmp_l() about the case
       of the characters comes from the locale represented by locale.

       The behavior is undefined if the locale argument to wcscasecmp_l() or
       wcsncasecmp_l() is the special locale object LC_GLOBAL_LOCALE or is
       not a valid locale object handle.

RETURN VALUE         top

       Upon completion, the wcscasecmp() and wcscasecmp_l() functions shall
       return an integer greater than, equal to, or less than 0 if the wide-
       character string pointed to by ws1 is, ignoring case, greater than,
       equal to, or less than the wide-character string pointed to by ws2,
       respectively.

       Upon completion, the wcsncasecmp() and wcsncasecmp_l() functions
       shall return an integer greater than, equal to, or less than 0 if the
       possibly null wide-character terminated string pointed to by ws1 is,
       ignoring case, greater than, equal to, or less than the possibly null
       wide-character terminated string pointed to by ws2, respectively.

       No return values are reserved to indicate an error.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       strcasecmp(3p), wcscmp(3p), wcsncmp(3p)

       The Base Definitions volume of POSIX.1‐2008, wchar.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                      WCSCASECMP(3P)

Pages that refer to this page: wchar.h(0p)strcasecmp(3p)wcscmp(3p)wcsncasecmp(3p)wcsncmp(3p)