1ISWALNUM(3)                Linux Programmer's Manual               ISWALNUM(3)
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NAME

6       iswalnum - test for alphanumeric wide character
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SYNOPSIS

9       #include <wctype.h>
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11       int iswalnum(wint_t wc);
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DESCRIPTION

14       The  iswalnum()  function is the wide-character equivalent of the isal‐
15       num() function. It tests whether wc is a wide  character  belonging  to
16       the wide character class "alnum".
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18       The  wide  character  class "alnum" is a subclass of the wide character
19       class "graph", and therefore also a  subclass  of  the  wide  character
20       class "print".
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22       Being  a subclass of the wide character class "print", the wide charac‐
23       ter class "alnum" is disjoint from the wide character class "cntrl".
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25       Being a subclass of the wide character class "graph", the wide  charac‐
26       ter class "alnum" is disjoint from the wide character class "space" and
27       its subclass "blank".
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29       The wide character class "alnum" is disjoint from  the  wide  character
30       class "punct".
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32       The  wide  character  class  "alnum" is the union of the wide character
33       classes "alpha" and "digit". As such, it also contains the wide charac‐
34       ter class "xdigit".
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36       The  wide  character class "alnum" always contains at least the letters
37       'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.
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RETURN VALUE

40       The iswalnum() function returns non-zero if  wc  is  a  wide  character
41       belonging  to  the  wide  character class "alnum". Otherwise it returns
42       zero.
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CONFORMING TO

45       C99.
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SEE ALSO

48       isalnum(3), iswctype(3)
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NOTES

51       The behaviour of iswalnum() depends on the  LC_CTYPE  category  of  the
52       current locale.
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56GNU                               1999-07-25                       ISWALNUM(3)