1WCTYPE(3) Linux Programmer's Manual WCTYPE(3)
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6 wctype - wide-character classification
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9 #include <wctype.h>
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11 wctype_t wctype(const char *name);
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14 The wctype_t type represents a property which a wide character may or
15 may not have. In other words, it represents a class of wide charac‐
16 ters. This type's nature is implementation-dependent, but the special
17 value (wctype_t) 0 denotes an invalid property. Nonzero wctype_t val‐
18 ues can be passed to the iswctype(3) function to actually test whether
19 a given wide character has the property.
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21 The wctype() function returns a property, given by its name. The set
22 of valid names depends on the LC_CTYPE category of the current locale,
23 but the following names are valid in all locales.
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25 "alnum" - realizes the isalnum(3) classification function
26 "alpha" - realizes the isalpha(3) classification function
27 "blank" - realizes the isblank(3) classification function
28 "cntrl" - realizes the iscntrl(3) classification function
29 "digit" - realizes the isdigit(3) classification function
30 "graph" - realizes the isgraph(3) classification function
31 "lower" - realizes the islower(3) classification function
32 "print" - realizes the isprint(3) classification function
33 "punct" - realizes the ispunct(3) classification function
34 "space" - realizes the isspace(3) classification function
35 "upper" - realizes the isupper(3) classification function
36 "xdigit" - realizes the isxdigit(3) classification function
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39 The wctype() function returns a property descriptor if the name is
40 valid. Otherwise, it returns (wctype_t) 0.
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43 For an explanation of the terms used in this section, see
44 attributes(7).
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46 ┌──────────┬───────────────┬────────────────┐
47 │Interface │ Attribute │ Value │
48 ├──────────┼───────────────┼────────────────┤
49 │wctype() │ Thread safety │ MT-Safe locale │
50 └──────────┴───────────────┴────────────────┘
52 POSIX.1-2001, POSIX.1-2008, C99.
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55 The behavior of wctype() depends on the LC_CTYPE category of the cur‐
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59 iswctype(3)
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62 This page is part of release 5.04 of the Linux man-pages project. A
63 description of the project, information about reporting bugs, and the
64 latest version of this page, can be found at
65 https://www.kernel.org/doc/man-pages/.
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69GNU 2015-08-08 WCTYPE(3)