1WCTYPE(3P)                 POSIX Programmer's Manual                WCTYPE(3P)
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PROLOG

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

13       wctype, wctype_l — define character class
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SYNOPSIS

16       #include <wctype.h>
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18       wctype_t wctype(const char *property);
19       wctype_t wctype_l(const char *property, locale_t locale);
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DESCRIPTION

22       For wctype(): The functionality described on  this  reference  page  is
23       aligned  with the ISO C standard. Any conflict between the requirements
24       described here and the ISO C standard is unintentional. This volume  of
25       POSIX.1‐2008 defers to the ISO C standard.
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27       The  wctype()  and wctype_l() functions are defined for valid character
28       class names as defined in the current locale or in  the  locale  repre‐
29       sented by locale, respectively.
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31       The property argument is a string identifying a generic character class
32       for which codeset-specific type information is required. The  following
33       character class names shall be defined in all locales:
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36              alnum   digit   punct
37              alpha   graph   space
38              blank   lower   upper
39              cntrl   print   xdigit
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41       Additional  character class names defined in the locale definition file
42       (category LC_CTYPE) can also be specified.
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44       These functions shall return a value of type  wctype_t,  which  can  be
45       used as the second argument to subsequent calls of iswctype() and iswc‐
46       type_l().
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48       The  wctype()  and  wctype_l()  functions  shall  determine  values  of
49       wctype_t  according  to the rules of the coded character set defined by
50       character type information in the current locale or in the locale  rep‐
51       resented by locale, respectively (category LC_CTYPE).
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53       The  values  returned by wctype() shall be valid until a call to setlo‐
54       cale() that modifies the category LC_CTYPE.
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56       The values returned by wctype_l() shall be valid only in calls to iswc‐
57       type_l()  with  a  locale  represented by locale with the same LC_CTYPE
58       category value.
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60       The behavior is undefined if the locale argument to wctype_l()  is  the
61       special  locale object LC_GLOBAL_LOCALE or is not a valid locale object
62       handle.
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RETURN VALUE

65       The wctype() and wctype_l() functions shall return 0 if the given char‐
66       acter  class  name  is  not  valid  for  the  current  locale (category
67       LC_CTYPE); otherwise, they shall return an object of type wctype_t that
68       can be used in calls to iswctype() and iswctype_l().
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ERRORS

71       No errors are defined.
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73       The following sections are informative.
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EXAMPLES

76       None.
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APPLICATION USAGE

79       None.
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RATIONALE

82       None.
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FUTURE DIRECTIONS

85       None.
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SEE ALSO

88       iswctype()
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90       The Base Definitions volume of POSIX.1‐2008, <wctype.h>
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93       Portions  of  this text are reprinted and reproduced in electronic form
94       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
95       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
96       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
97       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
98       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
99       event of any discrepancy between this version and the original IEEE and
100       The Open Group Standard, the original IEEE and The Open Group  Standard
101       is  the  referee document. The original Standard can be obtained online
102       at http://www.unix.org/online.html .
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104       Any typographical or formatting errors that appear  in  this  page  are
105       most likely to have been introduced during the conversion of the source
106       files to man page format. To report such errors,  see  https://www.ker
107       nel.org/doc/man-pages/reporting_bugs.html .
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111IEEE/The Open Group                  2013                           WCTYPE(3P)
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