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Name

iswctype - test character for specified class

Synopsis

cc [ flag ... ] file ... -lw [ library ... ]

#include <wchar.h>

int iswctype(wint_t wc, wctype_t charclass);

MT-Level

MT-Safe

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(3I) or charclass is invalidated by a subsequent call to setlocale(3C) that has affected category LC_CTYPE ), the result is implementation-dependent.

Return Value

iswctype() returns 0 for FALSE and non-zero for TRUE .

Usage

The twelve strings -- "alnum", "alpha", "blank" "cntrl", "digit", "graph", "lower", "print", "punct", "space", "upper" and "xdigit" -- are reserved for the standard character classes. 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.

See Also

iswalnum(3I) , iswalpha(3I) , iswcntrl(3I) , iswdigit(3I) , iswgraph(3I) , iswlower(3I) , iswprint(3I) , iswpunct(3I) , iswspace(3I) , iswupper(3I) , iswxdigit(3I) , setlocale(3C) , wctype(3I)

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