The Single UNIX ® Specification, Version 2
Copyright © 1997 The Open Group


iswdigit - test for a decimal digit wide-character code


#include <wctype.h>

int iswdigit(wint_t wc);


The iswdigit() function tests whether wc is a wide-character code representing a character of class digit in the program's current locale, see the XBD specification, Locale .

In all cases wc is a wint_t, the value of which must be a wide-character code corresponding to a valid character in the current locale or must equal the value of the macro WEOF. If the argument has any other value, the behaviour is undefined.


The iswdigit() function returns non-zero if wc is a decimal digit wide-character code; otherwise it returns 0.


No errors are defined.




To ensure applications portability, especially across natural languages, only this function and those listed in the SEE ALSO section should be used for classification of wide-character codes.




iswalnum(), iswalpha(), iswcntrl(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), <wctype.h>, <wchar.h>.

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Copyright © 1997 The Open Group
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