Manpage of ISWUPPER

ISWUPPER

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

NAME

iswupper - test for uppercase wide character  

SYNOPSIS

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

DESCRIPTION

The iswupper() function is the wide-character equivalent of the isupper(3) function. It tests whether wcis a wide character belonging to the wide-character class "upper".

The wide-character class "upper" is a subclass of the wide-character class "alpha", 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 "upper" is disjoint from the wide-character class "cntrl".

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

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

The wide-character class "upper" contains at least those characters wcwhich are equal to towupper(wc)and different from towlower(wc).

The wide-character class "upper" always contains at least the letters aqAaq to aqZaq.  

RETURN VALUE

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

ATTRIBUTES

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

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, C99.  

NOTES

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

This function is not very appropriate for dealing with Unicode characters, because Unicode knows about three cases: upper, lower and title case.  

SEE ALSO

isupper(3), iswctype(3), towupper(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 22:27:47 GMT, June 20, 2016 Click Here!