1WCTYPE(3)                  Linux Programmer's Manual                 WCTYPE(3)
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NAME

6       wctype - wide-character classification
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SYNOPSIS

9       #include <wctype.h>
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11       wctype_t wctype(const char *name);
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DESCRIPTION

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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RETURN VALUE

39       The wctype() function returns a property  descriptor  if  the  name  is
40       valid.  Otherwise, it returns (wctype_t) 0.
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ATTRIBUTES

43       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
44       tributes(7).
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46       ┌─────────────────────────────────────┬───────────────┬────────────────┐
47       │Interface                            │ Attribute     │ Value          │
48       ├─────────────────────────────────────┼───────────────┼────────────────┤
49       │wctype()                             │ Thread safety │ MT-Safe locale │
50       └─────────────────────────────────────┴───────────────┴────────────────┘
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CONFORMING TO

53       POSIX.1-2001, POSIX.1-2008, C99.
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NOTES

56       The behavior of wctype() depends on the LC_CTYPE category of  the  cur‐
57       rent locale.
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SEE ALSO

60       iswctype(3)
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COLOPHON

63       This  page  is  part of release 5.12 of the Linux man-pages project.  A
64       description of the project, information about reporting bugs,  and  the
65       latest     version     of     this    page,    can    be    found    at
66       https://www.kernel.org/doc/man-pages/.
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70GNU                               2021-03-22                         WCTYPE(3)
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