| .\" 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 ISWALPHA 3 1999-07-25 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| iswalpha \- test for alphabetic wide character |
| .SH SYNOPSIS |
| .nf |
| .B #include <wctype.h> |
| .sp |
| .BI "int iswalpha(wint_t " wc ); |
| .fi |
| .SH DESCRIPTION |
| The \fBiswalpha\fP() function is the wide-character equivalent of the |
| \fBisalpha\fP() function. It tests whether \fIwc\fP is a wide character |
| belonging to the wide character class "alpha". |
| .PP |
| 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". |
| .PP |
| Being a subclass of the wide character class "print", the wide character class |
| "alpha" is disjoint from the wide character class "cntrl". |
| .PP |
| 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". |
| .PP |
| Being a subclass of the wide character class "alnum", the wide character class |
| "alpha" is disjoint from the wide character class "punct". |
| .PP |
| The wide character class "alpha" is disjoint from the wide character class |
| "digit". |
| .PP |
| The wide character class "alpha" contains the wide character classes "upper" |
| and "lower". |
| .PP |
| The wide character class "alpha" always contains at least the letters 'A' |
| to 'Z' and 'a' to 'z'. |
| .SH "RETURN VALUE" |
| The \fBiswalpha\fP() function returns non-zero if \fIwc\fP is a wide character |
| belonging to the wide character class "alpha". Otherwise it returns zero. |
| .SH "CONFORMING TO" |
| ISO/ANSI C, UNIX98 |
| .SH "SEE ALSO" |
| .BR isalpha (3), |
| .BR iswctype (3) |
| .SH NOTES |
| The behaviour of \fBiswalpha\fP() depends on the LC_CTYPE category of the |
| current locale. |