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diff --git a/man3/iswlower.3 b/man3/iswlower.3 new file mode 100644 index 000000000..31dcfff6d --- /dev/null +++ b/man3/iswlower.3 @@ -0,0 +1,64 @@ +.\" Copyright (c) Bruno Haible <haible@clisp.cons.org> +.\" +.\" This is free documentation; you can redistribute it and/or +.\" modify it under the terms of the GNU General Public License as +.\" published by the Free Software Foundation; either version 2 of +.\" the License, or (at your option) any later version. +.\" +.\" References consulted: +.\" GNU glibc-2 source code and manual +.\" Dinkumware C library reference http://www.dinkumware.com/ +.\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html +.\" ISO/IEC 9899:1999 +.\" +.TH ISWLOWER 3 1999-07-25 "GNU" "Linux Programmer's Manual" +.SH NAME +iswlower \- test for lowercase wide character +.SH SYNOPSIS +.nf +.B #include <wctype.h> +.sp +.BI "int iswlower(wint_t " wc ); +.fi +.SH DESCRIPTION +The \fBiswlower\fP function is the wide-character equivalent of the +\fBislower\fP function. It tests whether \fIwc\fP is a wide character +belonging to the wide character class "lower". +.PP +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". +.PP +Being a subclass of the wide character class "print", the wide character class +"lower" is disjoint from the wide character class "cntrl". +.PP +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". +.PP +Being a subclass of the wide character class "alnum", the wide character class +"lower" is disjoint from the wide character class "punct". +.PP +Being a subclass of the wide character class "alpha", the wide character class +"lower" is disjoint from the wide character class "digit". +.PP +The wide character class "lower" contains at least those characters \fIwc\fP +which are equal to \fItowlower(wc)\fP and different from \fItowupper(wc)\fP. +.PP +The wide character class "lower" always contains at least the letters 'a' +to 'z'. +.SH "RETURN VALUE" +The \fBiswlower\fP function returns non-zero if \fIwc\fP is a wide character +belonging to the wide character class "lower". Otherwise it returns zero. +.SH "CONFORMING TO" +ISO/ANSI C, UNIX98 +.SH "SEE ALSO" +.BR islower (3), +.BR iswctype (3), +.BR towlower (3) +.SH NOTES +The behaviour of \fBiswlower\fP depends on the LC_CTYPE category of the +current locale. +.PP +This function is not very appropriate for dealing with Unicode characters, +because Unicode knows about three cases: upper, lower and title case. |