/**

 * vim: set ts=4 sw=4 tw=99 noet :

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

 * SourceMod

 * Copyright (C) 2004-2010 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>.

 */

#ifndef _INCLUDE_SOURCEMOD_MEMORYUTILS_H_

#define _INCLUDE_SOURCEMOD_MEMORYUTILS_H_

#include <IMemoryUtils.h>

#include <string.h>

#include <vector>

#if defined PLATFORM_LINUX || defined PLATFORM_APPLE

#include "sm_symtable.h"

#include <unistd.h>

#endif

using namespace SourceMod;

using std::vector;

struct DynLibInfo

{

	void *baseAddress;

	size_t memorySize;

};

#if defined PLATFORM_LINUX || defined PLATFORM_APPLE

struct LibSymbolTable

{

	SymbolTable table;

	AddrTable table2;

	uintptr_t lib_base;

	uint32_t last_pos;

};

#endif

class MemoryUtils

{

public:

	MemoryUtils();

	~MemoryUtils();

public: // IMemoryUtils

	void *FindPattern(const void *libPtr, const char *pattern, size_t len);

	void *ResolveSymbol(void *handle, const char *symbol);

	const char *ResolveAddr(void *handle, void *addr);

public:

	void *FindPatternInFile(int fd, const char *pattern, size_t len);

	bool GetLibraryInfo(const void *libPtr, DynLibInfo &lib);

#if defined PLATFORM_LINUX || defined PLATFORM_APPLE

private:

	vector<LibSymbolTable *> m_SymTables;

#ifdef PLATFORM_APPLE

	struct dyld_all_image_infos *m_ImageList;

#endif

#endif

};

#endif // _INCLUDE_SOURCEMOD_MEMORYUTILS_H_