wctype

Article
2017-12-18

The latest version of this topic can be found at 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 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.

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 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" ) )`

Requirements

Routine	Required header
`wctype`	<wctype.h>

For additional compatibility information, see Compatibility in the Introduction.

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