WCTYPE(3)                  POSIX Programmer's Manual                 WCTYPE(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
       wctype, wctype_l -- define character class

SSYYNNOOPPSSIISS
       #include <wctype.h>

       wctype_t wctype(const char *_p_r_o_p_e_r_t_y);
       wctype_t wctype_l(const char *_p_r_o_p_e_r_t_y, locale_t _l_o_c_a_l_e);

DDEESSCCRRIIPPTTIIOONN
       For _w_c_t_y_p_e(): The functionality described on this reference page is
       aligned with the ISO C standard. Any conflict between the requirements
       described here and the ISO C standard is unintentional. This volume of
       POSIX.1-2017 defers to the ISO C standard.

       The _w_c_t_y_p_e() and _w_c_t_y_p_e___l() functions are defined for valid character
       class names as defined in the current locale or in the locale
       represented by _l_o_c_a_l_e, respectively.

       The _p_r_o_p_e_r_t_y argument is a string identifying a generic character class
       for which codeset-specific type information is required. The following
       character class names shall be defined in all locales:


              aallnnuumm   ddiiggiitt   ppuunncctt
              aallpphhaa   ggrraapphh   ssppaaccee
              bbllaannkk   lloowweerr   uuppppeerr
              ccnnttrrll   pprriinntt   xxddiiggiitt

       Additional character class names defined in the locale definition file
       (category _L_C___C_T_Y_P_E) can also be specified.

       These functions shall return a value of type wwccttyyppee__tt, which can be
       used as the second argument to subsequent calls of _i_s_w_c_t_y_p_e() and
       _i_s_w_c_t_y_p_e___l().

       The _w_c_t_y_p_e() and _w_c_t_y_p_e___l() functions shall determine values of
       wwccttyyppee__tt according to the rules of the coded character set defined by
       character type information in the current locale or in the locale
       represented by _l_o_c_a_l_e, respectively (category _L_C___C_T_Y_P_E).

       The values returned by _w_c_t_y_p_e() shall be valid until a call to
       _s_e_t_l_o_c_a_l_e() that modifies the category _L_C___C_T_Y_P_E.

       The values returned by _w_c_t_y_p_e___l() shall be valid only in calls to
       _i_s_w_c_t_y_p_e___l() with a locale represented by _l_o_c_a_l_e with the same _L_C___C_T_Y_P_E
       category value.

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

RREETTUURRNN VVAALLUUEE
       The _w_c_t_y_p_e() and _w_c_t_y_p_e___l() functions shall return 0 if the given
       character class name is not valid for the current locale (category
       _L_C___C_T_Y_P_E); otherwise, they shall return an object of type wwccttyyppee__tt that
       can be used in calls to _i_s_w_c_t_y_p_e() and _i_s_w_c_t_y_p_e___l().

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
       _i_s_w_c_t_y_p_e()

       The Base Definitions volume of POSIX.1-2017, <<wwccttyyppee..hh>>

CCOOPPYYRRIIGGHHTT
       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                            WCTYPE(3)
