wctype
Determines a classification rule for wide-character codes.
Syntax
wctype_t wctype(
const char * property
);
Parameters
property
Property string.
Return value
If the LC_CTYPE category of the current locale doesn't define a classification rule whose name matches the property string property, the function returns zero. Otherwise, it returns a nonzero value suitable for use as the second argument to a subsequent call to towctrans.
Remarks
The function determines a classification rule for wide-character codes. The following pairs of calls have the same behavior in all locales (but an implementation can define more classification rules even in the "C" locale):
| Function | Same as |
|---|---|
iswalnum(c) |
iswctype(c, wctype( "alnum" )) |
iswalpha(c) |
iswctype(c, wctype( "alpha" )) |
iswcntrl(c) |
iswctype(c, wctype( "cntrl" )) |
iswdigit(c) |
iswctype(c, wctype( "digit" )) |
iswgraph(c) |
iswctype(c, wctype( "graph" )) |
iswlower(c) |
iswctype(c, wctype( "lower" )) |
iswprint(c) |
iswctype(c, wctype( "print" )) |
iswpunct(c) |
iswctype(c, wctype( "punct" )) |
iswspace(c) |
iswctype(c, wctype( "space" )) |
iswupper(c) |
iswctype(c, wctype( "upper" )) |
iswxdigit(c) |
iswctype(c, wctype( "xdigit" )) |
Requirements
| Routine | Required header |
|---|---|
wctype |
<wctype.h> |
For more compatibility information, see Compatibility.