NAME
iswblank — test
for a blank wide-character code
SYNOPSIS
#include
<wctype.h>
int iswblank(wint_t wc);
DESCRIPTION
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.
The iswblank () function shall
test whether wc is a wide-character code representing a
character of class
blank in the
program's current locale; see the Base Definitions volume of
IEEE Std 1003.1-2001 (“POSIX.1”),
xbd_chap07(7).
The wc argument is a wint_t, the value of which the application shall ensure is a wide-character code corresponding to a valid character in the current locale, or equal to the value of the macro WEOF. If the argument has any other value, the behavior is undefined.
RETURN VALUE
The iswblank () function shall return
non-zero if wc is a blank wide-character code; otherwise,
it shall return 0.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
To ensure applications portability, especially across natural languages, only this function and those listed in the SEE ALSO section should be used for classification of wide-character codes.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
iswalnum(3), iswalpha(3), iswcntrl(3), iswctype(3), iswdigit(3), iswgraph(3), iswlower(3), iswprint(3), iswpunct(3), iswspace(3), iswupper(3), iswxdigit(3), setlocale(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), xbd_chap07(7), <stdio.h>, <wchar.h>, <wctype.h>
CHANGE HISTORY
First released in Issue 6. Derived from the ISO/IEC 9899:1999 (“ISO C99”) standard.
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