NAME
iswalnum,
iswalpha,
iswblank,
iswcntrl,
iswdigit,
iswgraph,
iswlower,
iswprint,
iswpunct,
iswspace,
iswupper,
iswxdigit
- wide character classification utilities
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
int
iswalnum(
wint_t wc
)
int
iswalpha(
wint_t wc
)
int
iswblank(
wint_t wc
)
int
iswcntrl(
wint_t wc
)
int
iswdigit(
wint_t wc
)
int
iswgraph(
wint_t wc
)
int
iswlower(
wint_t wc
)
int
iswprint(
wint_t wc
)
int
iswpunct(
wint_t wc
)
int
iswspace(
wint_t wc
)
int
iswupper(
wint_t wc
)
int
iswxdigit(
wint_t wc
)
DESCRIPTION
The functions are character classification utility functions,
for use with wide characters
wint_t
(
wchar_t
or.)
See the description of singlebyte classification functions, like
isalnum(3),
for details.
RETURN VALUES
The functions return zero if the character tests false and
return non-zero if the character tests true.
SEE ALSO
isalnum(3),
isalpha(3),
isblank(3),
iscntrl(3),
isdigit(3),
isgraph(3),
islower(3),
isprint(3),
ispunct(3),
isspace(3),
isupper(3),
isxdigit(3)
STANDARDS
The functions conform to
ISO/IEC 9899:1999 (``ISO C99'') .
CAVEATS
The argument to these functions must be
WEOF
or a valid
wchar_t
value with the current locale; otherwise, the result is undefined.