wctype(3C) Standard C Library Functions wctype(3C)NAME
wctype - define character class
SYNOPSIS
#include <wchar.h>
wctype_t wctype(const char *charclass);
DESCRIPTION
The wctype() function is defined for valid character class names as defined in the current locale. The charclass is a string identifying a
generic character class for which codeset-specific type information is required. The following character class names are defined in all
locales:
alnum alpha blank
cntrl digit graph
lower print punct
space upper xdigit
Additional character class names defined in the locale definition file (category LC_CTYPE) can also be specified.
The function returns a value of type wctype_t, which can be used as the second argument to subsequent calls of iswctype(3C). wctype()
determines values of wctype_t according to the rules of the coded character set defined by character type information in the program's
locale (category LC_CTYPE). The values returned by wctype() are valid until a call to setlocale(3C) that modifies the category LC_CTYPE.
RETURN VALUES
The wctype() function returns 0 if the given character class name is not valid for the current locale (category LC_CTYPE); otherwise it
returns an object of type wctype_t that can be used in calls to iswctype().
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe with exceptions |
+-----------------------------+-----------------------------+
SEE ALSO iswctype(3C), setlocale(3C), attributes(5), standards(5)SunOS 5.10 14 Aug 2002 wctype(3C)
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iswctype(3C) Standard C Library Functions iswctype(3C)NAME
iswctype - test character for specified class
SYNOPSIS
#include <wchar.h>
int iswctype(wint_t wc, wctype_t charclass);
DESCRIPTION
The iswctype() function determines whether the wide-character code wc has the character class charclass, returning TRUE or FALSE. The iswc-
type() function is defined on WEOF and wide-character codes corresponding to the valid character encodings in the current locale. If the wc
argument is not in the domain of the function, the result is undefined. If the value of charclass is invalid (that is, not obtained by a
call to wctype(3C) or charclass is invalidated by a subsequent call to setlocale(3C) that has affected category LC_CTYPE), the result is
indeterminate.
RETURN VALUES
The iswctype() function returns 0 for FALSE and non-zero for TRUE.
USAGE
There are twelve strings that are reserved for the standard character classes:
| |
"alnum" |"alpha" | "blank"
"cntrl" |"digit" | "graph"
"lower" |"print" | "punct"
"space" |"upper" | "xdigit"
In the table below, the functions in the left column are equivalent to the functions in the right column.
iswalnum(wc) iswctype(wc, wctype("alnum"))
iswalpha(wc) iswctype(wc, wctype("alpha"))
iswcntrl(wc) iswctype(wc, wctype("cntrl"))
iswdigit( wc) iswctype(wc, wctype("digit"))
iswgraph(wc) iswctype(wc, wctype("graph"))
iswlower(wc) iswctype(wc, wctype("lower"))
iswprint(wc) iswctype(wc, wctype("print"))
iswpunct(wc) iswctype( wc, wctype("punct"))
iswspace(wc) iswctype(wc, wctype("space"))
iswupper(wc) iswctype(wc, wctype("upper"))
iswxdigit(wc) iswctype(wc, wctype("xdigit"))
The call
iswctype(wc, wctype("blank"))
does not have an equivalent isw*() function.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe with exceptions |
+-----------------------------+-----------------------------+
SEE ALSO iswalpha(3C), setlocale(3C), wctype(3C), attributes(5), environ(5), standards(5)SunOS 5.10 24 Jul 2002 iswctype(3C)