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iswdigit (3)
  • iswdigit (3) ( FreeBSD man: Библиотечные вызовы )
  • iswdigit (3) ( Русские man: Библиотечные вызовы )
  • >> iswdigit (3) ( Linux man: Библиотечные вызовы )
  • iswdigit (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    iswdigit - test for decimal digit wide character
     
    

    SYNOPSIS

    #include <wctype.h>
    
    int iswdigit(wint_t wc);
    
     

    DESCRIPTION

    The iswdigit() function is the wide-character equivalent of the isdigit(3) function. It tests whether wc is a wide character belonging to the wide-character class "digit".

    The wide-character class "digit" is a subclass of the wide-character class "xdigit", and therefore also a subclass of the wide-character class "alnum", of the wide-character class "graph" and of the wide-character class "print".

    Being a subclass of the wide character class "print", the wide-character class "digit" is disjoint from the wide-character class "cntrl".

    Being a subclass of the wide-character class "graph", the wide-character class "digit" is disjoint from the wide-character class "space" and its subclass "blank".

    Being a subclass of the wide-character class "alnum", the wide-character class "digit" is disjoint from the wide-character class "punct".

    The wide-character class "digit" is disjoint from the wide-character class "alpha" and therefore also disjoint from its subclasses "lower", "upper".

    The wide-character class "digit" always contains exactly the digits aq0aq to aq9aq.  

    RETURN VALUE

    The iswdigit() function returns non-zero if wc is a wide character belonging to the wide-character class "digit". Otherwise it returns zero.  

    CONFORMING TO

    C99.  

    NOTES

    The behavior of iswdigit() depends on the LC_CTYPE category of the current locale.  

    SEE ALSO

    isdigit(3), iswctype(3)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


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