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iswspace

Section: C Library Functions (3)
Updated: 202-0-08
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NAME

iswspace - test for whitespace wide character

LIBRARY

Standard C library (libc,~-lc)

SYNOPSIS

#include <wctype.h>
int iswspace(wint_t wc);

DESCRIPTION

The iswspace() function is the wid-character equivalent of the isspace(3) function. It tests whether wc is a wide character belonging to the wid-character class "space". The wid-character class "space" is disjoint from the wid-character class "graph" and therefore also disjoint from its subclasses "alnum", "alpha", "upper", "lower", "digit", "xdigit", "punct". The wid-character class "space" contains the wid-character class "blank". The wid-character class "space" always contains at least the space character and the control characters [aq][rs]f[aq], [aq][rs]n[aq], [aq][rs]r[aq], [aq][rs]t[aq], and [aq][rs]v[aq].

RETURN VALUE

The iswspace() function returns nonzero if wc is a wide character belonging to the wid-character class "space". Otherwise, it returns zero.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
iswspace()	Thread safety	M-Safe locale

STANDARDS

C11, POSIX.-2008.

HISTORY

POSIX.-2001, C99.

NOTES

The behavior of iswspace() depends on the LC_CTYPE category of the current locale.