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

6       iswalpha - test for alphabetic wide character
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SYNOPSIS

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

14       The  iswalpha()  function is the wide-character equivalent of the isal‐
15       pha(3) function.  It tests whether wc is a wide character belonging  to
16       the wide-character class "alpha".
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18       The  wide-character  class  "alpha" is a subclass of the wide-character
19       class "alnum", and therefore also  a  subclass  of  the  wide-character
20       class "graph" and of the wide-character class "print".
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22       Being  a subclass of the wide-character class "print", the wide-charac‐
23       ter class "alpha" 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 "alpha" is disjoint from the wide-character class "space" and
27       its subclass "blank".
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29       Being a subclass of the wide-character class "alnum", the  wide-charac‐
30       ter class "alpha" is disjoint from the wide-character class "punct".
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32       The  wide-character  class  "alpha" is disjoint from the wide-character
33       class "digit".
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35       The wide-character class "alpha" contains  the  wide-character  classes
36       "upper" and "lower".
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38       The  wide-character  class "alpha" always contains at least the letters
39       'A' to 'Z' and 'a' to 'z'.
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RETURN VALUE

42       The iswalpha() function returns non-zero if  wc  is  a  wide  character
43       belonging  to  the  wide-character class "alpha".  Otherwise it returns
44       zero.
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CONFORMING TO

47       C99.
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NOTES

50       The behavior of iswalpha() depends on the LC_CTYPE category of the cur‐
51       rent locale.
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SEE ALSO

54       isalpha(3), iswctype(3)
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COLOPHON

57       This  page  is  part of release 3.22 of the Linux man-pages project.  A
58       description of the project, and information about reporting  bugs,  can
59       be found at http://www.kernel.org/doc/man-pages/.
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63GNU                               1999-07-25                       ISWALPHA(3)
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