wcscasecmp(3p) — Linux manual page

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

PROLOG

       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

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

SYNOPSIS

       #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

       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_CTYPE 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

       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

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

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

       The Base Definitions volume of POSIX.1‐2017, wchar.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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               2017                    WCSCASECMP(3P)

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

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