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.