Mercurial > hg > octave-lojdl > gnulib-hg
changeset 10572:6329ac05c888
Add a comment.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Fri, 03 Oct 2008 14:04:31 +0200 |
parents | 8a5e51b0fb50 |
children | 39f73ea22045 |
files | ChangeLog lib/c-ctype.h |
diffstat | 2 files changed, 21 insertions(+), 1 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2008-10-03 Bruno Haible <bruno@clisp.org> + + * lib/c-ctype.h: Add comment. + Reported by Jim Meyering. + 2008-10-02 Bruno Haible <bruno@clisp.org> * modules/posix_spawn-internal (Depends-on): Add 'open'.
--- a/lib/c-ctype.h +++ b/lib/c-ctype.h @@ -5,7 +5,7 @@ <ctype.h> functions' behaviour depends on the current locale set via setlocale. - Copyright (C) 2000-2003, 2006 Free Software Foundation, Inc. + Copyright (C) 2000-2003, 2006, 2008 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -103,6 +103,21 @@ /* Function declarations. */ +/* Unlike the functions in <ctype.h>, which require an argument in the range + of the 'unsigned char' type, the functions here operate on values that are + in the 'unsigned char' range or in the 'char' range. In other words, + when you have a 'char' value, you need to cast it before using it as + argument to a <ctype.h> function: + + const char *s = ...; + if (isalpha ((unsigned char) *s)) ... + + but you don't need to cast it for the functions defined in this file: + + const char *s = ...; + if (c_isalpha (*s)) ... + */ + extern bool c_isascii (int c); /* not locale dependent */ extern bool c_isalnum (int c);