/*************************************************************************
** FontEncoding.cpp                                                     **
**                                                                      **
** This file is part of dvisvgm -- the DVI to SVG converter             **
** Copyright (C) 2005-2013 Martin Gieseking <martin.gieseking@uos.de>   **
**                                                                      **
** 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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/

#include "CMap.h"
#include "CMapManager.h"
#include "EncFile.h"
#include "FileFinder.h"
#include "FontEncoding.h"

using namespace std;


struct EncodingMap : public map<string, EncFile*>
{
	~EncodingMap () {
		for (EncodingMap::iterator it=begin(); it != end(); ++it)
			delete it->second;
	}
};


/** Returns the encoding object for a given encoding name.
 * @param[in] encname name of the encoding to lookup
 * @return pointer to encoding object, or 0 if there is no encoding defined */
FontEncoding* FontEncoding::encoding (const string &encname) {
	if (encname.empty())
		return 0;
	// initially, try to find an .enc file with the given name
	static EncodingMap encmap;
	EncodingMap::const_iterator it = encmap.find(encname);
	if (it != encmap.end())
		return it->second;
	if (FileFinder::lookup(encname + ".enc", false)) {
		EncFile *enc = new EncFile(encname);
		encmap[encname] = enc;
		return enc;
	}
	// no .enc file found => try to find a CMap
	if (CMap *cmap = CMapManager::instance().lookup(encname))
		return cmap;
	return 0;
}