Manpage of ISWALPHA

ISWALPHA

Section: Linux Programmer's Manual (3)
Updated: 2015-08-08
Index
 

NAME

iswalpha - test for alphabetic wide character  

SYNOPSIS

#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 wcis 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 aqAaq to aqZaq and aqaaq to aqzaq.  

RETURN VALUE

The iswalpha() function returns nonzero if wcis a wide character belonging to the wide-character class "alpha". Otherwise, it returns zero.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
iswalpha() Thread safetyMT-Safe locale
 

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, C99.  

NOTES

The behavior of iswalpha() depends on the LC_CTYPEcategory of the current locale.  

SEE ALSO

isalpha(3), iswctype(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO

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Time: 22:27:54 GMT, June 20, 2016