wctype.3c (2010 09)

wctype(3C) wctype(3C)

iswspace(wc) wc is a character that creates "white space" in displayed text (in ASCII: space,

tab, carriage return, new-line, vertical tab, and form-feed).

iswpunct(wc) wc is a punctuation character (in ASCII: any printing character except the

space character (040), digits, letters).

iswprint(wc) wc is a printing character.

iswgraph(wc) wc is a visible character (in ASCII: printing characters, excluding the space

character (040)).

iswcntrl(wc) wc is a control character (in ASCII: character codes less than 040 and the

delete character (0177)).

If the argument to any of these functions is outside the domain of the function, the result is 0 (false).

Deﬁnitions for these functions and the types

wint_t, wchar_t, and wctype_t are provided in the

<wchar.h> header.

EXTERNAL INFLUENCES

Locale

The

LC_CTYPE category determines the classiﬁcation of character type.

International Code Set Support

Single-byte and multibyte character code sets are supported.

AUTHOR

wctype() was developed by IBM, OSF, and HP.