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PROLOG | NAME | SYNOPSIS | DESCRIPTION | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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wctype.h(0P) POSIX Programmer's Manual wctype.h(0P)
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.
wctype.h — wide-character classification and mapping utilities
#include <wctype.h>
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.
None.
None.
None.
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), wctype(3p)
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)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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