view doc/c-strcaseeq.texi @ 16464:2a3849cfe7b9

Tests for module 'modf-ieee'. * modules/modf-ieee-tests: New file. * tests/test-modf-ieee.c: New file.
author Bruno Haible <bruno@clisp.org>
date Sun, 26 Feb 2012 17:55:21 +0100
parents 8250f2777afc
children e542fd46ad6f
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@c Documentation of gnulib module 'c-strcaseeq'.

@c Copyright (C) 2008-2012 Free Software Foundation, Inc.

@c Permission is granted to copy, distribute and/or modify this document
@c under the terms of the GNU Free Documentation License, Version 1.3 or
@c any later version published by the Free Software Foundation; with no
@c Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
@c Texts.  A copy of the license is included in the ``GNU Free
@c Documentation License'' file as part of this distribution.

The @code{c-strcaseeq} module contains an optimized case-insensitive
string comparison function operating on single-byte character strings, that
operate as if the locale encoding was ASCII.
(The "C" locale on many systems has the locale encoding "ASCII".)

The functions is actually implemented as a macro:
@smallexample
extern int STRCASEEQ (const char *s1, const char *s2,
                      int s20, int s21, int s22, int s23, int s24, int s25,
                      int s26, int s27, int s28);
@end smallexample

@var{s2} should be a short literal ASCII string, and @var{s20}, @var{s21}, ...
the individual characters of @var{s2}.

For case conversion here, only ASCII characters are considered to be
upper case or lower case.