/*
 * Copyright (c) 2004 Beeyond Software Holding BV
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#define BEECRYPT_CXX_DLL_EXPORT

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "beecrypt/c++/security/Provider.h"

using namespace beecrypt::security;

Provider::Provider(const String& name, double version, const String& info)
{
	_name = name;
	_info = info;
	_vers = version;

	_lock.init();

	UErrorCode status = U_ZERO_ERROR;

	_conv = ucnv_open(NULL, &status);
	if (U_FAILURE(status))
		throw "failed to create default unicode converter";

	#if WIN32
	_dlhandle = NULL;
	#elif defined(RTLD_DEFAULT)
	_dlhandle = RTLD_DEFAULT;
	#else
	_dlhandle = (void*) 0;
	#endif
}

Provider::~Provider()
{
	_lock.destroy();

	ucnv_close(_conv);
}

Provider::instantiator Provider::getInstantiator(const String& key) const
{
	instantiator_map::const_iterator it = _imap.find(key);

	if (it != _imap.end())
		return it->second;
	else
		return 0;
}

void Provider::put(const String& key, const String& value)
{
	_lock.lock();

	// add it in the properties
	setProperty(key, value);

	// add it in the instantiator map only if there is no space in the value (i.e. it's a property instead of a class)
	if (value.indexOf((UChar) 0x20) == -1)
	{
		char symname[1024];

		UErrorCode status = U_ZERO_ERROR;

		ucnv_fromUChars(_conv, symname, 1024, value.getBuffer(), value.length(), &status);

		if (status != U_ZERO_ERROR)
		{
			_lock.unlock();
			throw "error in ucnv_fromUChars";
		}

		instantiator i;

		#if WIN32
		if (!_dlhandle)
			_dlhandle = GetModuleHandle(NULL);
		i = (instantiator) GetProcAddress((HMODULE) _dlhandle, symname);
		#elif HAVE_DLFCN_H
		i = (instantiator) dlsym(_dlhandle, symname);
		#else
		# error
		#endif

		_imap[key] = i;
	}
	else
		_imap[key] = 0;

	_lock.unlock();
}

const String& Provider::getInfo() const throw ()
{
	return _info;
}

const String& Provider::getName() const throw ()
{
	return _name;
}

double Provider::getVersion() const throw ()
{
	return _vers;
}