1WCTYPE(3P) POSIX Programmer's Manual WCTYPE(3P)
2
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.
10
12 wctype, wctype_l — define character class
13
15 #include <wctype.h>
16 wctype_t wctype(const char *property);
18 wctype_t wctype_l(const char *property, locale_t locale);
19
21 For wctype(): The functionality described on this reference page is
22 aligned with the ISO C standard. Any conflict between the requirements
23 described here and the ISO C standard is unintentional. This volume of
24 POSIX.1‐2017 defers to the ISO C standard.
25 The wctype() and wctype_l() functions are defined for valid character
27 class names as defined in the current locale or in the locale repre‐
28 sented by locale, respectively.
29 The property argument is a string identifying a generic character class
31 for which codeset-specific type information is required. The following
32 character class names shall be defined in all locales:
33 alnum digit punct
36 alpha graph space
37 blank lower upper
38 cntrl print xdigit
39 Additional character class names defined in the locale definition file
41 (category LC_CTYPE) can also be specified.
42 These functions shall return a value of type wctype_t, which can be
44 used as the second argument to subsequent calls of iswctype() and iswc‐
45 type_l().
46 The wctype() and wctype_l() functions shall determine values of
48 wctype_t according to the rules of the coded character set defined by
49 character type information in the current locale or in the locale rep‐
50 resented by locale, respectively (category LC_CTYPE).
51 The values returned by wctype() shall be valid until a call to setlo‐
53 cale() that modifies the category LC_CTYPE.
54 The values returned by wctype_l() shall be valid only in calls to iswc‐
56 type_l() with a locale represented by locale with the same LC_CTYPE
57 category value.
58 The behavior is undefined if the locale argument to wctype_l() is the
60 special locale object LC_GLOBAL_LOCALE or is not a valid locale object
61 handle.
62
64 The wctype() and wctype_l() functions shall return 0 if the given char‐
65 acter class name is not valid for the current locale (category
66 LC_CTYPE); otherwise, they shall return an object of type wctype_t that
67 can be used in calls to iswctype() and iswctype_l().
68
70 No errors are defined.
71 The following sections are informative.
73
75 None.
76
78 None.
79
81 None.
82
84 None.
85
87 iswctype()
88 The Base Definitions volume of POSIX.1‐2017, <wctype.h>
90
92 Portions of this text are reprinted and reproduced in electronic form
93 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
94 table Operating System Interface (POSIX), The Open Group Base Specifi‐
95 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
96 Electrical and Electronics Engineers, Inc and The Open Group. In the
97 event of any discrepancy between this version and the original IEEE and
98 The Open Group Standard, the original IEEE and The Open Group Standard
99 is the referee document. The original Standard can be obtained online
100 at http://www.opengroup.org/unix/online.html .
101 Any typographical or formatting errors that appear in this page are
103 most likely to have been introduced during the conversion of the source
104 files to man page format. To report such errors, see https://www.ker‐
105 nel.org/doc/man-pages/reporting_bugs.html .
106IEEE/The Open Group 2017 WCTYPE(3P)