wctype
Determines a classification rule for wide-character codes.
wctype_t wctype( const char * property );
If the LC_CTYPE category of the current locale does not 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.
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 additional 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" ) ) |
Routine | Required header |
|---|---|
wctype | <wctype.h> |
For additional compatibility information, see Compatibility in the Introduction.
