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ISWALPHA(3) | Linux Programmer's Manual | ISWALPHA(3) |
NAME¶
iswalpha - test for alphabetic wide characterSYNOPSIS¶
#include <wctype.h>int iswalpha(wint_t wc);
DESCRIPTION¶
The iswalpha() function is the wide-character equivalent of the isalpha(3) function. It tests whether wc is a wide character belonging to the wide-character class "alpha". The wide-character class "alpha" is a subclass of the wide-character class "alnum", and therefore also a subclass 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 "alpha" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide-character class "alpha" 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 "alpha" is disjoint from the wide-character class "punct". The wide-character class "alpha" is disjoint from the wide-character class "digit". The wide-character class "alpha" contains the wide-character classes "upper" and "lower". The wide-character class "alpha" always contains at least the letters 'A' to 'Z' and 'a' to 'z'.RETURN VALUE¶
The iswalpha() function returns nonzero if wc is a wide character belonging to the wide-character class "alpha". Otherwise it returns zero.CONFORMING TO¶
C99.NOTES¶
The behavior of iswalpha() depends on the LC_CTYPE category of the current locale.SEE ALSO¶
isalpha(3), iswctype(3)COLOPHON¶
This page is part of release 3.44 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/.1999-07-25 | GNU |