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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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wctype(3) Library Functions Manual wctype(3)
wctype - wide-character classification
Standard C library (libc, -lc)
#include <wctype.h>
wctype_t wctype(const char *name);
The wctype_t type represents a property which a wide character may
or may not have. In other words, it represents a class of wide
characters. This type's nature is implementation-dependent, but
the special value (wctype_t) 0 denotes an invalid property.
Nonzero wctype_t values can be passed to the iswctype(3) function
to actually test whether a given wide character has the property.
The wctype() function returns a property, given by its name. The
set of valid names depends on the LC_CTYPE category of the current
locale, but the following names are valid in all locales.
"alnum" - realizes the isalnum(3) classification function
"alpha" - realizes the isalpha(3) classification function
"blank" - realizes the isblank(3) classification function
"cntrl" - realizes the iscntrl(3) classification function
"digit" - realizes the isdigit(3) classification function
"graph" - realizes the isgraph(3) classification function
"lower" - realizes the islower(3) classification function
"print" - realizes the isprint(3) classification function
"punct" - realizes the ispunct(3) classification function
"space" - realizes the isspace(3) classification function
"upper" - realizes the isupper(3) classification function
"xdigit" - realizes the isxdigit(3) classification function
The wctype() function returns a property descriptor if the name is
valid. Otherwise, it returns (wctype_t) 0.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│ wctype() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
C11, POSIX.1-2008.
POSIX.1-2001, C99.
The behavior of wctype() depends on the LC_CTYPE category of the
current locale.
iswctype(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
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Linux man-pages 6.10 2024-09-01 wctype(3)
Pages that refer to this page: iswctype(3), regex(7)
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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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