istring.cpp

Go to the documentation of this file.

/*
Copyright (C) 1997-2001 Id Software, Inc.
Copyright (C) 2003 The Pentagram Team

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 the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

// istring.cpp -- case insensitive stl strings

#include "pent_include.h"
#include "istring.h"

namespace Pentagram {

int strncasecmp (const char *s1, const char *s2, uint32 length)
{
        uint32  c1, c2;
        
        do
        {
                c1 = *s1++;
                c2 = *s2++;

                if (!length--)
                        return 0;               // strings are equal until end point
                
                if (c1 != c2)
                {
                        if (c1 >= 'a' && c1 <= 'z')
                                c1 -= ('a' - 'A');
                        if (c2 >= 'a' && c2 <= 'z')
                                c2 -= ('a' - 'A');
                        if (c1 != c2)
                                return (c1 < c2) ? -1 : 1; // strings not equal
                }
        } while (c1);
        
        return 0;               // strings are equal
}

int strcasecmp (const char *s1, const char *s2)
{
        return strncasecmp (s1, s2, 2147483647);
}

#ifndef UNDER_CE

bool ichar_traits::eq(const char_type & c1, const char_type & c2)
{
        uint32 c3 = c1;
        uint32 c4 = c2;
        if (c3 >= 'a' && c3 <= 'z')
                c3 -= ('a' - 'A');
        if (c4 >= 'a' && c4 <= 'z')
                c4 -= ('a' - 'A');
        return c3 == c4;
}

bool ichar_traits::lt(const char_type & c1, const char_type & c2)
{
        uint32 c3 = c1;
        uint32 c4 = c2;
        if (c3 >= 'a' && c3 <= 'z')
                c3 -= ('a' - 'A');
        if (c4 >= 'a' && c4 <= 'z')
                c4 -= ('a' - 'A');
        return c3 < c4;         
}

int ichar_traits::compare(const char_type * s1, const char_type * s2, size_t length)
{
        return strncasecmp(s1, s2, length);
}

#endif

};

---