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



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


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

SSYYNNOOPPSSIISS
       #include <wchar.h>

       int wcscasecmp(const wchar_t *_w_s_1, const wchar_t *_w_s_2);
       int wcscasecmp_l(const wchar_t *_w_s_1, const wchar_t *_w_s_2,
           locale_t _l_o_c_a_l_e);
       int wcsncasecmp(const wchar_t *_w_s_1, const wchar_t *_w_s_2, size_t _n);
       int wcsncasecmp_l(const wchar_t *_w_s_1, const wchar_t *_w_s_2,
           size_t _n, locale_t _l_o_c_a_l_e);

DDEESSCCRRIIPPTTIIOONN
       The _w_c_s_c_a_s_e_c_m_p() and _w_c_s_n_c_a_s_e_c_m_p() functions are the wide-character
       equivalent of the _s_t_r_c_a_s_e_c_m_p() and _s_t_r_n_c_a_s_e_c_m_p() functions,
       respectively.

       The _w_c_s_c_a_s_e_c_m_p() and _w_c_s_c_a_s_e_c_m_p___l() functions shall compare, while
       ignoring differences in case, the wide-character string pointed to by
       _w_s_1 to the wide-character string pointed to by _w_s_2.

       The _w_c_s_n_c_a_s_e_c_m_p() and _w_c_s_n_c_a_s_e_c_m_p___l() functions shall compare, while
       ignoring differences in case, not more than _n wide-characters from the
       wide-character string pointed to by _w_s_1 to the wide-character string
       pointed to by _w_s_2.

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

       The _w_c_s_c_a_s_e_c_m_p___l() and _w_c_s_n_c_a_s_e_c_m_p___l() functions use the locale
       represented by _l_o_c_a_l_e to determine the case of the wide characters.

       When the _L_C___C_T_I_M_E 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 _w_c_s_c_a_s_e_c_m_p___l() and _w_c_s_n_c_a_s_e_c_m_p___l() about the case
       of the characters comes from the locale represented by _l_o_c_a_l_e.

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

RREETTUURRNN VVAALLUUEE
       Upon completion, the _w_c_s_c_a_s_e_c_m_p() and _w_c_s_c_a_s_e_c_m_p___l() functions shall
       return an integer greater than, equal to, or less than 0 if the wide-
       character string pointed to by _w_s_1 is, ignoring case, greater than,
       equal to, or less than the wide-character string pointed to by _w_s_2,
       respectively.

       Upon completion, the _w_c_s_n_c_a_s_e_c_m_p() and _w_c_s_n_c_a_s_e_c_m_p___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 _w_s_1 is,
       ignoring case, greater than, equal to, or less than the possibly null
       wide-character terminated string pointed to by _w_s_2, respectively.

       No return values are reserved to indicate an error.

EERRRROORRSS
       No errors are defined.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _s_t_r_c_a_s_e_c_m_p(), _w_c_s_c_m_p(), _w_c_s_n_c_m_p()

       The Base Definitions volume of POSIX.1-2008, <<wwcchhaarr..hh>>

CCOOPPYYRRIIGGHHTT
       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(3)
