libemailfunctions

kasciistricmp.cpp
1 /* This file is part of the KDE libraries
2  Copyright (C) 2004 David Faure <faure@kde.org>
3 
4  This library is free software; you can redistribute it and/or
5  modify it under the terms of the GNU Library General Public
6  License version 2 as published by the Free Software Foundation.
7 
8  This library is distributed in the hope that it will be useful,
9  but WITHOUT ANY WARRANTY; without even the implied warranty of
10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11  Library General Public License for more details.
12 
13  You should have received a copy of the GNU Library General Public License
14  along with this library; see the file COPYING.LIB. If not, write to
15  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
16  Boston, MA 02110-1301, USA.
17 */
18 
19 #include "kasciistricmp.h"
20 
21 #if ! KDE_IS_VERSION(3,3,89)
22 
23 static unsigned char tdepim_ASCIIToLower( unsigned char ch )
24 {
25  if ( ch >= 'A' && ch <= 'Z' )
26  return ch - 'A' + 'a';
27  else
28  return ch;
29 }
30 
31 int tdepim_kasciistricmp( const char *str1, const char *str2 )
32 {
33  const unsigned char *s1 = (const unsigned char *) str1;
34  const unsigned char *s2 = (const unsigned char *) str2;
35  int res;
36  unsigned char c;
37 
38  if ( !s1 || !s2 )
39  return s1 ? 1 : ( s2 ? -1 : 0 );
40  for ( ; !( res = ( c = tdepim_ASCIIToLower( *s1 ) ) - tdepim_ASCIIToLower( *s2 ) );
41  ++s1, ++s2 )
42  if ( !c ) // strings are equal
43  break;
44  return res;
45 }
46 
47 #endif