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. iswctype() 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
iswctype() 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 |
| MT-Level | MT-Safe with exceptions |
| CSI | Enabled |
SEE ALSO
iswalnum(3C), iswalpha(3C), iswcntrl(3C), iswdigit(3C), iswgraph(3C), iswlower(3C), iswprint(3C), iswpunct(3C), iswspace(3C), iswupper(3C), iswxdigit(3C), setlocale(3C), wctype(3C), attributes(5)
SunOS 5.6 — Last change: 20 Dec 1996