File indexing completed on 2023-10-03 03:16:18

 /*  -*- c++ -*-
     Copyright (c) 2005 Ingo Kloecker <kloecker@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "kascii.h"
 
 int kasciistricmp(const char *str1, const char *str2)
 {
     const unsigned char *s1 = (const unsigned char *)str1;
     const unsigned char *s2 = (const unsigned char *)str2;
     int res;
     unsigned char c1, c2;
 
     if (!s1 || !s2) {
         return s1 ? 1 : (s2 ? -1 : 0);
     }
     if (!*s1 || !*s2) {
         return *s1 ? 1 : (*s2 ? -1 : 0);
     }
     for (; *s1; ++s1, ++s2) {
         c1 = *s1; c2 = *s2;
         if (c1 >= 'A' && c1 <= 'Z') {
             c1 += 'a' - 'A';
         }
         if (c2 >= 'A' && c2 <= 'Z') {
             c2 += 'a' - 'A';
         }
 
         if ((res = c1 - c2)) {
             break;
         }
     }
     return *s1 ? res : (*s2 ? -1 : 0);
 }
 
 /** Convert a single ASCII character to lowercase.
     @param ch Character to convert
     @internal
 */
 static unsigned char ASCIIToLower(unsigned char ch)
 {
     if (ch >= 'A' && ch <= 'Z') {
         return ch - 'A' + 'a';
     } else {
         return ch;
     }
 }
 
 char *kAsciiToLower(char *s)
 {
     if (!s) {
         return nullptr;
     }
     for (unsigned char *p = (unsigned char *) s; *p; ++p) {
         *p = ASCIIToLower(*p);
     }
     return s;
 }
 
 /** Convert a single ASCII character to uppercase.
     @param ch Character to convert
     @internal
 */
 static unsigned char ASCIIToUpper(unsigned char ch)
 {
     if (ch >= 'a' && ch <= 'z') {
         return ch - 'a' + 'A';
     } else {
         return ch;
     }
 }
 
 char *kAsciiToUpper(char *s)
 {
     if (!s) {
         return nullptr;
     }
     for (unsigned char *p = (unsigned char *) s; *p; ++p) {
         *p = ASCIIToUpper(*p);
     }
     return s;
 }