wctype.h(0p) — Linux manual page


wctype.h(0P)            POSIX Programmer's Manual           wctype.h(0P)

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

       wctype.h — wide-character classification and mapping utilities

SYNOPSIS         top

       #include <wctype.h>

DESCRIPTION         top

       Some of the functionality described on this reference page
       extends the ISO C standard. Applications shall define the
       appropriate feature test macro (see the System Interfaces volume
       of POSIX.1‐2017, Section 2.2, The Compilation Environment) to
       enable the visibility of these symbols in this header.

       The <wctype.h> header shall define the following types:

       wint_t      As described in <wchar.h>.

       wctrans_t   A scalar type that can hold values which represent
                   locale-specific character mappings.

       wctype_t    As described in <wchar.h>.

       The <wctype.h> header shall define the locale_t type as described
       in <locale.h>.

       The <wctype.h> header shall define the following macro:

       WEOF        As described in <wchar.h>.

       For all functions described in this header that accept an
       argument of type wint_t, the value is representable as a wchar_t
       or equals the value of WEOF. If this argument has any other
       value, the behavior is undefined.

       The behavior of these functions shall be affected by the LC_CTYPE
       category of the current locale.

       Inclusion of the <wctype.h> header may make visible all symbols
       from the headers <ctype.h>, <stdarg.h>, <stddef.h>, <stdio.h>,
       <stdlib.h>, <string.h>, <time.h>, and <wchar.h>.

       The following shall be declared as functions and may also be
       defined as macros. Function prototypes shall be provided for use
       with ISO C standard compilers.

           int       iswalnum(wint_t);
           int       iswalnum_l(wint_t, locale_t);
           int       iswalpha(wint_t);
           int       iswalpha_l(wint_t, locale_t);
           int       iswblank(wint_t);
           int       iswblank_l(wint_t, locale_t);
           int       iswcntrl(wint_t);
           int       iswcntrl_l(wint_t, locale_t);
           int       iswctype(wint_t, wctype_t);
           int       iswctype_l(wint_t, wctype_t, locale_t);
           int       iswdigit(wint_t);
           int       iswdigit_l(wint_t, locale_t);
           int       iswgraph(wint_t);
           int       iswgraph_l(wint_t, locale_t);
           int       iswlower(wint_t);
           int       iswlower_l(wint_t, locale_t);
           int       iswprint(wint_t);
           int       iswprint_l(wint_t, locale_t);
           int       iswpunct(wint_t);
           int       iswpunct_l(wint_t, locale_t);
           int       iswspace(wint_t);
           int       iswspace_l(wint_t, locale_t);
           int       iswupper(wint_t);
           int       iswupper_l(wint_t, locale_t);
           int       iswxdigit(wint_t);
           int       iswxdigit_l(wint_t, locale_t);
           wint_t    towctrans(wint_t, wctrans_t);
           wint_t    towctrans_l(wint_t, wctrans_t, locale_t);
           wint_t    towlower(wint_t);
           wint_t    towlower_l(wint_t, locale_t);
           wint_t    towupper(wint_t);
           wint_t    towupper_l(wint_t, locale_t);
           wctrans_t wctrans(const char *);
           wctrans_t wctrans_l(const char *, locale_t);
           wctype_t  wctype(const char *);
           wctype_t  wctype_l(const char *, locale_t);

       The following sections are informative.



RATIONALE         top




SEE ALSO         top

       ctype.h(0p), locale.h(0p), stdarg.h(0p), stddef.h(0p),
       stdio.h(0p), stdlib.h(0p), string.h(0p), time.h(0p), wchar.h(0p)

       The System Interfaces volume of POSIX.1‐2017, Section 2.2, The
       Compilation Environment, iswalnum(3p), iswalpha(3p),
       iswblank(3p), iswcntrl(3p), iswctype(3p), iswdigit(3p),
       iswgraph(3p), iswlower(3p), iswprint(3p), iswpunct(3p),
       iswspace(3p), iswupper(3p), iswxdigit(3p), setlocale(3p),
       towctrans(3p), towlower(3p), towupper(3p), wctrans(3p),

COPYRIGHT         top

       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.h(0P)

Pages that refer to this page: unistd.h(0p)wchar.h(0p)iswalnum(3p)iswalpha(3p)iswblank(3p)iswcntrl(3p)iswctype(3p)iswdigit(3p)iswgraph(3p)iswlower(3p)iswprint(3p)iswpunct(3p)iswspace(3p)iswupper(3p)iswxdigit(3p)towctrans(3p)towlower(3p)towupper(3p)wctrans(3p)wctype(3p)