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Shell Programming and Scripting
Bourne Shell: Special characters Input Prevention
Post 302185463 by era on Tuesday 15th of April 2008 04:15:58 AM
04-15-2008
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LEARN ABOUT LINUX
iswlower
ISWLOWER(3) Linux Programmer's Manual ISWLOWER(3) NAME
iswlower - test for lowercase wide character SYNOPSIS
#include <wctype.h> int iswlower(wint_t wc); DESCRIPTION
The iswlower() function is the wide-character equivalent of the islower(3) function. It tests whether wc is a wide character belonging to the wide-character class "lower". The wide-character class "lower" 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 "lower" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide-character class "lower" 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 "lower" is disjoint from the wide-character class "punct". Being a subclass of the wide-character class "alpha", the wide-character class "lower" is disjoint from the wide-character class "digit". The wide-character class "lower" contains at least those characters wc which are equal to towlower(wc) and different from towupper(wc). The wide-character class "lower" always contains at least the letters 'a' to 'z'. RETURN VALUE
The iswlower() function returns nonzero if wc is a wide character belonging to the wide-character class "lower". Otherwise it returns zero. CONFORMING TO
C99. NOTES
The behavior of iswlower() depends on the LC_CTYPE category 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
islower(3), iswctype(3), towlower(3) COLOPHON
This page is part of release 3.27 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/. GNU
1999-07-25 ISWLOWER(3)