/**

 * vim: set ts=4 :

 * ================================================================

 * SourceMod

 * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.

 * ================================================================

 *

 * This program is free software; you can redistribute it and/or 

 * modify it under the terms of the GNU General Public License, 

 * version 3.0, as published by the Free Software Foundation.

 * 

 * 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/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to 

 * link the code of this program (as well as its derivative works) to 

 * "Half-Life 2," the "Source Engine," the "SourcePawn JIT," and any 

 * Game MODs that run on software by the Valve Corporation.  You must 

 * obey the GNU General Public License in all respects for all other 

 * code used. Additionally, AlliedModders LLC grants this exception 

 * to all derivative works. AlliedModders LLC defines further 

 * exceptions, found in LICENSE.txt (as of this writing, version 

 * JULY-31-2007), or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#include "sm_globals.h"

#include "HandleSys.h"

#include "PluginSys.h"

static cell_t sm_IsValidHandle(IPluginContext *pContext, const cell_t *params)

{

	Handle_t hndl = static_cast<Handle_t>(params[1]);

	HandleError err = g_HandleSys.ReadHandle(hndl, 0, NULL, NULL);

	if (err != HandleError_Access

		&& err != HandleError_None)

	{

		return 0;

	}

	return 1;

}

static cell_t sm_CloseHandle(IPluginContext *pContext, const cell_t *params)

{

	Handle_t hndl = static_cast<Handle_t>(params[1]);

	HandleSecurity sec;

	sec.pIdentity = NULL;

	sec.pOwner = pContext->GetIdentity();

	HandleError err = g_HandleSys.FreeHandle(hndl, &sec);

	if (err == HandleError_None)

	{

		return 1;

	} else if (err == HandleError_Access) {

		return 0;

	} else {

		return pContext->ThrowNativeError("Handle %x is invalid (error %d)", hndl, err);

	}

}

static cell_t sm_CloneHandle(IPluginContext *pContext, const cell_t *params)

{

	Handle_t new_hndl;

	Handle_t hndl = static_cast<Handle_t>(params[1]);

	HandleError err;

	IdentityToken_t *pNewOwner;

	if (params[2] == 0)

	{

		pNewOwner = pContext->GetIdentity();

	} else {

		Handle_t hPlugin = static_cast<Handle_t>(params[2]);

		IPlugin *pPlugin = g_PluginSys.PluginFromHandle(hPlugin, &err);

		if (!pPlugin)

		{

			return pContext->ThrowNativeError("Plugin handle %x is invalid (error %d)", hndl, err);

		}

		pNewOwner = pPlugin->GetIdentity();

	}

	err = g_HandleSys.CloneHandle(hndl, &new_hndl, pNewOwner, NULL);

	if (err == HandleError_Access)

	{

		return 0;

	} else if (err == HandleError_None) {

		return new_hndl;

	} else {

		return pContext->ThrowNativeError("Handle %x cannot be cloned because it is invalid (error %d)", hndl, err);

	}

}

static cell_t sm_GetMyHandle(IPluginContext *pContext, const cell_t *params)

{

	CPlugin *pPlugin = g_PluginSys.GetPluginByCtx(pContext->GetContext());

	return pPlugin->GetMyHandle();

}

REGISTER_NATIVES(handles)

{

	{"IsValidHandle",			sm_IsValidHandle},

	{"CloseHandle",				sm_CloseHandle},

	{"CloneHandle",				sm_CloneHandle},

	{"GetMyHandle",				sm_GetMyHandle},

	{NULL,						NULL},

};