kicad/3d-viewer/3d_cache/str_rsort.h

88 lines
2.6 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015 Cirilo Bernardo <cirilo.bernardo@gmail.com>
*
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file str_rsort.h
* provides a wxString sorting functino which works from the
* end of the string towards the beginning
*/
#ifndef STR_RSORT_H
#define STR_RSORT_H
#include <wx/string.h>
namespace S3D
{
struct rsort_wxString
{
bool operator() (const wxString& strA, const wxString& strB ) const
{
// sort a wxString using the reverse character order; for 3d model
// filenames this will typically be a much faster operation than
// a normal alphabetic sort
wxString::const_reverse_iterator sA = strA.rbegin();
wxString::const_reverse_iterator eA = strA.rend();
wxString::const_reverse_iterator sB = strB.rbegin();
wxString::const_reverse_iterator eB = strB.rend();
if( strA.empty() )
{
if( strB.empty() )
return false;
// note: this rule implies that a null string is first in the sort order
return true;
}
if( strB.empty() )
return false;
while( sA != eA && sB != eB )
{
if( (*sA) == (*sB) )
{
++sA;
++sB;
continue;
}
if( (*sA) < (*sB) )
return true;
else
return false;
}
if( sB == eB )
return false;
return true;
}
};
} // end NAMESPACE
#endif // STR_RSORT_H