/**

  * vim: set ts=4 :

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

  * SourceMod

  * Copyright (C) 2004-2008 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 "GameDataFetcher.h"

 #include "bitbuf.h"

 #ifdef PLATFORM_WINDOWS

 #include <winsock2.h>

 #else

 #include <unistd.h>

 #include <sys/types.h>

 #include <sys/socket.h>

 #include <netinet/in.h>

 #include <netdb.h>

 #include <arpa/inet.h>

 #define INVALID_SOCKET		-1

 #define closesocket 		close

 #define WSAGetLastError()	errno

 #endif

 #include "sh_vector.h"

 #include "sh_string.h"

 #include "sm_version.h"

 #if SOURCE_ENGINE == SE_LEFT4DEAD

 #include "convar_sm_l4d.h"

 #elif SOURCE_ENGINE == SE_ORANGEBOX

 #include "convar_sm_ob.h"

 #else

 #include "convar_sm.h"

 #endif

 #include "sourcemm_api.h"

 #include "time.h"

 #include "TimerSys.h"

 #include "compat_wrappers.h"

 #include "sm_stringutil.h"

 #include "md5.h"

 #include "frame_hooks.h"

 #define QUERY_MAX_LENGTH 1024

 static BuildMD5ableBuffer g_MD5Builder;

 static FetcherThread g_FetchThread;

 static FILE *logfile = NULL;

 bool g_disableGameDataUpdate = false;

 /**

  * Note on this.  If we issue a reload and changelevel, my srcds.exe will emit 

  *   Assertion Failed: !m_bServiceStarted

  * on quit.  This seems like a non-issue, because before we just terminated the 

  * server anyway.  If anyone notices and files a bug, we can look into it further.

  */

 bool g_restartAfterUpdate = false;

 static bool was_level_started = false;

 static int g_serverPort = 6500;

 static char g_serverAddress[100] = "smupdate.alliedmods.net";

 static void _ForceRestart(void *data)

 {

 	char cmd[300];

 	g_Logger.LogMessage("Automatically restarting SourceMod after a successful gamedata update.");

 	UTIL_Format(cmd, sizeof(cmd), "meta unload %d\n", g_PLID);

 	engine->ServerCommand(cmd);

 	UTIL_Format(cmd, sizeof(cmd), "changelevel \"%s\"\n", STRING(gpGlobals->mapname));

 	engine->ServerCommand(cmd);

 	UTIL_Format(cmd, sizeof(cmd), "echo SourceMod restarted after gamedata update.\n");

 	engine->ServerCommand(cmd);

 }

 static void ForceRestart()

 {

 	FrameAction action;

 	action.action = _ForceRestart;

 	action.data = NULL;

 	AddFrameAction(action);

 }

 void FetcherThread::RunThread(IThreadHandle *pHandle)

 {

 	char lock_path[PLATFORM_MAX_PATH];

 	g_SourceMod.BuildPath(Path_SM, lock_path, sizeof(lock_path), "data/temp");

 	g_LibSys.CreateFolder(lock_path);

 	g_SourceMod.BuildPath(Path_SM, lock_path, sizeof(lock_path), "data/temp/gamedata.lock");

 	char log_path[PLATFORM_MAX_PATH];

 	g_SourceMod.BuildPath(Path_SM, log_path, sizeof(log_path), "logs/gamedata");

 	g_LibSys.CreateFolder(log_path);

 	time_t t;

 	GetAdjustedTime(&t);

 	tm *curtime = localtime(&t);

 	g_SourceMod.BuildPath(Path_SM, log_path, sizeof(log_path), "logs/gamedata/L%02d%02d.log", curtime->tm_mon + 1, curtime->tm_mday);

 	logfile = fopen(log_path, "a");

 	if (!logfile)

 	{

 		/* :( */

 		return;

 	}

 	//Create a blank lock file

 	FILE *fp = fopen(lock_path, "w");

 	if (fp)

 	{

 		fclose(fp);

 	}

 	char query[QUERY_MAX_LENGTH];

 	/* Check for updated gamedata files */

 	int len = BuildGameDataQuery(query, QUERY_MAX_LENGTH);

 	if (len == 0)

 	{

 		g_Logger.LogToFileOnly(logfile, "Could not build gamedata query!");

 		fclose(logfile);

 		unlink(lock_path);

 		return;

 	}

 	/* We check this late so we have the MD5 sums available.  This may change in the future. */

 	if (g_disableGameDataUpdate)

 	{

 		g_Logger.LogToFileOnly(logfile, "Skipping gamedata fetcher (DisableAutoUpdate set)");

 		fclose(logfile);

 		unlink(lock_path);

 		return;

 	}

 	/* Create a new socket for this connection */

 	int socketDescriptor = ConnectSocket();

 	if (socketDescriptor == INVALID_SOCKET)

 	{

 		fclose(logfile);

 		unlink(lock_path);

 		return;

 	}

 	int sent = SendData(socketDescriptor, query, len);

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "Sent gamedata query");

 ENDIF_DEBUG_SPEW

 	if (sent == 0)

 	{

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "Failed to send gamedata query data to remote host");

 ENDIF_DEBUG_SPEW

 		closesocket(socketDescriptor);

 		fclose(logfile);

 		unlink(lock_path);

 		return;

 	}

 	ProcessGameDataQuery(socketDescriptor);

 	/* And we're done! */

 	closesocket(socketDescriptor);

 	fclose(logfile);

 	unlink(lock_path);

 }

 void FetcherThread::OnTerminate(IThreadHandle *pHandle, bool cancel)

 {

 	g_blockGameDataLoad = false;

 	if (cancel)

 	{

 		return;

 	}

 	if (wasSuccess)

 	{

 		HandleUpdateStatus(updateStatus, build);

 		if (needsRestart)

 		{

 			if (g_restartAfterUpdate)

 			{

 				if (was_level_started)

 				{

 					ForceRestart();

 				}

 			}

 			else

 			{

 				g_Logger.LogMessage("Your gamedata files have been updated, please restart your server.");

 			}

 		}

 	}

 	else if (!g_disableGameDataUpdate)

 	{

 		g_Logger.LogError("An error occurred in the gamedata fetcher, see your gamedata log files for more information.");

 	}

 }

 int FetcherThread::BuildGameDataQuery(char *buffer, int maxlen)

 {

 	char gamedata_path[PLATFORM_MAX_PATH];

 	g_SourceMod.BuildPath(Path_SM, gamedata_path, sizeof(gamedata_path), "gamedata");

 	IDirectory *dir = g_LibSys.OpenDirectory(gamedata_path);

 	if (dir == NULL)

 	{

 		return 0;

 	}

 	bf_write Writer = bf_write("GameDataQuery", buffer, maxlen);

 	Writer.WriteByte('A'); //Generic Header char

 	Writer.WriteByte('G'); //G for gamedata query, or green, like my hat.

 	short build[4] = { SVN_FILE_VERSION };

 	Writer.WriteBytes(&build[0], 8);

 	Writer.WriteByte(0); // Initialize the file counter - Index 10

 	while (dir->MoreFiles())

 	{

 		if (dir->IsEntryFile())

 		{

 			const char *name = dir->GetEntryName();

 			size_t len = strlen(name);

 			if (len >= 4 && strcmp(&name[len-4], ".txt") == 0)

 			{

 				MD5 md5;

 				SMCError err;

 				SMCStates states;

 				unsigned char raw[16];

 				char file[PLATFORM_MAX_PATH];

 				g_LibSys.PathFormat(file, sizeof(file), "%s/%s", gamedata_path, name);

 				g_MD5Builder.checksum = &md5;

 				if ((err = g_TextParser.ParseFile_SMC(file, &g_MD5Builder, &states)) == SMCError_Okay)

 				{

 					md5.raw_digest(raw);

 					(uint8_t)buffer[10]++; //Increment the file counter

 					Writer.WriteBytes(raw, 16);

 					FileData *data = new FileData();

 					data->filename = new SourceHook::String(file);

 					md5.hex_digest(data->checksum);

 					filenames.push_back(data);

 IF_DEBUG_SPEW

 					g_Logger.LogToFileOnly(logfile, "Parsed file: %s as %s", file, data->checksum);

 ENDIF_DEBUG_SPEW

 				}

 				else

 				{

 IF_DEBUG_SPEW

 					const char *error = g_TextParser.GetSMCErrorString(err);

 					g_Logger.LogToFileOnly(logfile, "Parsing of file %s failed: %s", file, error);

 ENDIF_DEBUG_SPEW

 				}

 			}

 		}

 		dir->NextEntry();

 	}

 	return Writer.GetNumBytesWritten();

 }

 int FetcherThread::ConnectSocket()

 {

 #if defined PLATFORM_WINDOWS

 	WSADATA wsaData;

 	WSAStartup(0x0101, &wsaData);

 #endif

 	struct protoent *ptrp;

 	if ((ptrp = getprotobyname("tcp")) == NULL) 

 	{

 		g_Logger.LogToFileOnly(logfile, "Error: Failed to find TCP protocol");

 		return INVALID_SOCKET;

 	}

 	int socketDescriptor = socket(AF_INET, SOCK_STREAM, ptrp->p_proto);

 	if (socketDescriptor == INVALID_SOCKET)

 	{

 		char error[255];

 		g_LibSys.GetPlatformErrorEx(WSAGetLastError(), error, sizeof(error));

 		g_Logger.LogToFileOnly(logfile, "Error: Failed to create socket: %s", error);

 		closesocket(socketDescriptor);

 		return INVALID_SOCKET;

 	}

 	struct hostent *he;

 	struct sockaddr_in local_addr;

 	local_addr.sin_family = AF_INET;

 	local_addr.sin_port = htons((u_short)g_serverPort);

 	he = gethostbyname(g_serverAddress);

 	if (!he)

 	{

 		if ((local_addr.sin_addr.s_addr = inet_addr(g_serverAddress)) == INADDR_NONE)

 		{

 			g_Logger.LogToFileOnly(logfile, "Couldn't locate address: %s", g_serverAddress);

 			closesocket(socketDescriptor);

 			return INVALID_SOCKET;

 		}

 	} 

 	else 

 	{

 		memcpy(&local_addr.sin_addr, (struct in_addr *)he->h_addr, he->h_length);

 	}

 	if (connect(socketDescriptor, (struct sockaddr *) &local_addr, sizeof(local_addr)) < 0)

 	{

 		char error[255];

 		g_LibSys.GetPlatformErrorEx(WSAGetLastError(), error, sizeof(error));

 		g_Logger.LogToFileOnly(logfile, "Couldn't connect to %s: %s", g_serverAddress, error);

 		closesocket(socketDescriptor);

 		return INVALID_SOCKET;

 	}

 	return socketDescriptor;

 }

 void FetcherThread::ProcessGameDataQuery(int socketDescriptor)

 {

 	char buffer[50];

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "Waiting for reply!");

 ENDIF_DEBUG_SPEW

 	//Read in the header bytes

 	int returnLen = RecvData(socketDescriptor, buffer, 12);

 	if (returnLen == 0)

 	{

 		char error[255];

 		g_LibSys.GetPlatformErrorEx(WSAGetLastError(), error, sizeof(error));

 		g_Logger.LogToFileOnly(logfile, "Did not receive reply: %s", error);

 		return;

 	}

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "Received Header!");

 ENDIF_DEBUG_SPEW

 	bf_read Reader = bf_read("GameDataQuery", buffer, 12);

 	if (Reader.ReadByte() != 'A' || Reader.ReadByte() != 'G')

 	{

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "Unknown Query Response");

 ENDIF_DEBUG_SPEW

 		return;

 	}

 	updateStatus = (UpdateStatus)Reader.ReadByte();

 	build[0] = Reader.ReadShort();

 	build[1] = Reader.ReadShort();

 	build[2] = Reader.ReadShort();

 	build[3] = Reader.ReadShort();

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile,

 						   "Update Status: %i - Latest %i.%i.%i.%i",

 						   updateStatus,

 						   build[0],

 						   build[1],

 						   build[2],

 						   build[3]);

 ENDIF_DEBUG_SPEW

 	int changedFiles = Reader.ReadByte();

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "Files to download: %i", changedFiles);

 ENDIF_DEBUG_SPEW

 	for (int i=0; i<changedFiles; i++)

 	{

 		//Read in the file index and byte count

 		returnLen = RecvData(socketDescriptor, buffer, 5);

 		if (returnLen == 0)

 		{

 			/* Timeout or fail? */

 			return;

 		}

 		Reader.StartReading(buffer, 5);

 		int index = Reader.ReadByte();

 		int tempLen = Reader.ReadUBitLong(32);

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "File index %i and length %i", index, tempLen);

 ENDIF_DEBUG_SPEW

 		void *memPtr;

 		memtable->CreateMem(tempLen+1, &memPtr);

 		//Read the contents of our file into the memtable

 		returnLen = RecvData(socketDescriptor, (char *)memPtr, tempLen);

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "Received %i bytes", returnLen);

 ENDIF_DEBUG_SPEW

 		if (returnLen == 0)

 		{

 			/* Timeout or fail? */

 			return;

 		}

 		((unsigned char *)memPtr)[tempLen] = '\0';

 		FileData *data = filenames.at(index);

 		const char *filename;

 		if (data != NULL)

 		{

 			filename = data->filename->c_str();

 			FILE *fp = fopen(filename, "w");

 			if (fp)

 			{

 				fprintf(fp, "%s", (const char *)memPtr);

 				fclose(fp);

 			}

 			else

 			{

 				g_Logger.LogToFileOnly(logfile, "Failed to open file \"%s\" for writing", filename);

 			}

 		}

 		else

 		{

 			filename = "";

 		}

 		memtable->Reset();

 		g_Logger.LogToFileOnly(logfile, "Updated file: %s", filename);

 	}

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "File Downloads Completed!");

 ENDIF_DEBUG_SPEW

 	needsRestart = false;

 	if (changedFiles > 0)

 	{

 		needsRestart = true;

 	}

 	//Read changed file count

 	returnLen = RecvData(socketDescriptor, buffer, 1);

 	if (returnLen == 0)

 	{

 		char error[255];

 		g_LibSys.GetPlatformErrorEx(WSAGetLastError(), error, sizeof(error));

 		g_Logger.LogToFileOnly(logfile, "Did not receive count reply: %s", error);

 		return;

 	}

 	Reader.StartReading(buffer, 1);

 	changedFiles = Reader.ReadByte();

 	if (changedFiles < 1)

 	{

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "No unknown files. We're all done");

 ENDIF_DEBUG_SPEW

 		return;

 	}

 	char *changedFileIndexes = new char[changedFiles];

 IF_DEBUG_SPEW

 	g_Logger.LogToFileOnly(logfile, "%i files were unknown", changedFiles);

 ENDIF_DEBUG_SPEW

 	returnLen = RecvData(socketDescriptor, changedFileIndexes, changedFiles);

 	if (returnLen == 0)

 	{

 		char error[255];

 		g_LibSys.GetPlatformErrorEx(WSAGetLastError(), error, sizeof(error));

 		g_Logger.LogToFileOnly(logfile, "Did not receive list reply: %s", error);

 		return;

 	}

 	Reader.StartReading(changedFileIndexes, changedFiles);

 	for (int i=0; i<changedFiles; i++)

 	{

 		int index = Reader.ReadByte();

 		char fileName[30];

 		FileData *data = filenames.at(index);

 		const char* pathname;

 		if (data != NULL)

 		{

 			pathname = data->filename->c_str();

 		}

 		else

 		{

 			pathname = "";

 		}

 		g_LibSys.GetFileFromPath(fileName, sizeof(fileName), pathname);

 IF_DEBUG_SPEW

 		g_Logger.LogToFileOnly(logfile, "Unknown File %i : %s", index, fileName);

 ENDIF_DEBUG_SPEW

 	}

 	delete [] changedFileIndexes;

 	wasSuccess = true;

 }

 int FetcherThread::RecvData(int socketDescriptor, char *buffer, int len)

 {

 	fd_set fds;

 	struct timeval tv;

 	/* Create a 10 Second Timeout */

 	tv.tv_sec = 10;

 	tv.tv_usec = 0;

 	int bytesReceivedTotal = 0;

 	while (bytesReceivedTotal < len)

 	{

 		/* Add our socket to a socket set */

 		FD_ZERO(&fds);

 		FD_SET(socketDescriptor, &fds);

 		/* Wait max of 10 seconds for recv to become available */

 		select(socketDescriptor+1, &fds, NULL, NULL, &tv);

 		int bytesReceived = 0;

 		/* Is there a limit on how much we can receive? Some site said 1024 bytes, which will be well short of a file */

 		if (FD_ISSET(socketDescriptor, &fds))

 		{

 			bytesReceived = recv(socketDescriptor, buffer+bytesReceivedTotal, len-bytesReceivedTotal, 0);

 		}

 		if (bytesReceived == 0 || bytesReceived == -1)

 		{

 			return 0;

 		}

 		bytesReceivedTotal += bytesReceived;

 	}

 	return bytesReceivedTotal;	

 }

 int FetcherThread::SendData(int socketDescriptor, char *buffer, int len)

 {

 	fd_set fds;

 	struct timeval tv;

 	tv.tv_sec = 10;

 	tv.tv_usec = 0;

 	int sentBytesTotal = 0;

 	while (sentBytesTotal < len)

 	{

 		FD_ZERO(&fds);

 		FD_SET(socketDescriptor, &fds);

 		select(socketDescriptor+1, NULL, &fds, NULL, &tv);

 		int sentBytes = 0;

 		if (FD_ISSET(socketDescriptor, &fds))

 		{

 			sentBytes = send(socketDescriptor, buffer+sentBytesTotal, len-sentBytesTotal, 0);

 		}

 		if (sentBytes == 0 || sentBytes == -1)

 		{

 			return 0;

 		}		

 		sentBytesTotal += sentBytes;

 	}

 	return sentBytesTotal;

 }

 void FetcherThread::HandleUpdateStatus(UpdateStatus status, short version[4])

 {

 	switch (status)

 	{

 		case Update_Unknown:

 		case Update_Current:

 		{

 			break;

 		}

 		case Update_NewBuild:

 		{

 			break;

 		}

 		case Update_MinorAvailable:

 		{

 			g_Logger.LogMessage("SourceMod Update: A new release of SourceMod is now available from sourcemod.net");

 			g_Logger.LogMessage("Current Version: %i.%i.%i Available: %i.%i.%i", version[0], version[1], version[2], version[0], version[1], version[2]);

 			break;

 		}

 		case Update_MajorAvailable:

 		{

 			g_Logger.LogMessage("SourceMod Update: An major release of SourceMod is now available from sourcemod.net");

 			g_Logger.LogMessage("Current Version: %i.%i.%i Available: %i.%i.%i", version[0], version[1], version[2], version[0], version[1], version[2]);

 			break;

 		}

 		case Update_CriticalAvailable:

 		{

 			g_Logger.LogError("SourceMod Update: A critical SourceMod release is available from sourcemod.net. It is strongly recommended that you update!");

 			g_Logger.LogMessage("Current Version: %i.%i.%i Available: %i.%i.%i", version[0], version[1], version[2], version[0], version[1], version[2]);

 			break;

 		}

 	}

 }

 bool g_blockGameDataLoad = false;

 static IThreadHandle *fetch_thread_hndl;

 class InitFetch : public SMGlobalClass

 {

 public:

 	void OnSourceModAllInitialized_Post()

 	{

 		char lock_path[PLATFORM_MAX_PATH];

 		g_SourceMod.BuildPath(Path_SM, lock_path, sizeof(lock_path), "data/temp/gamedata.lock");

 		if (g_LibSys.IsPathFile(lock_path) && g_LibSys.PathExists(lock_path))

 		{

 			g_Logger.LogError("sourcemod/data/temp/gamedata.lock file detected. This is most likely due to a crash during GameData updating - Blocking GameData loading");

 			g_Logger.LogError("If this error persists delete the file manually");

 			g_blockGameDataLoad = true;

 		}

 		ThreadParams fetchThreadParams = ThreadParams();

 		fetchThreadParams.prio = ThreadPrio_Low;

 		fetch_thread_hndl = g_pThreader->MakeThread(&g_FetchThread, &fetchThreadParams);

 	}

 	void OnSourceModShutdown()

 	{

 		fetch_thread_hndl->WaitForThread();

 		fetch_thread_hndl->DestroyThis();

 	}

 	void OnSourceModLevelActivated()

 	{

 		was_level_started = true;

 		if (g_restartAfterUpdate && 

 			g_FetchThread.wasSuccess && 

 			g_FetchThread.needsRestart)

 		{

 			ForceRestart();

 		}

 	}

 	void OnSourceModLevelEnd()

 	{

 		was_level_started = false;

 	}

 	ConfigResult OnSourceModConfigChanged(const char *key, 

 		const char *value, 

 		ConfigSource source,

 		char *error, 

 		size_t maxlength)

 	{

 		if (strcasecmp(key, "DisableAutoUpdate") == 0)

 		{

 			if (strcasecmp(value, "yes") == 0)

 			{

 				g_disableGameDataUpdate = true;

 				return ConfigResult_Accept;

 			}

 			else if (strcasecmp(value, "no") == 0)

 			{

 				g_disableGameDataUpdate = false;

 				return ConfigResult_Accept;

 			}

 			return ConfigResult_Reject;

 		}

 		if (strcasecmp(key, "ForceRestartAfterUpdate") == 0)

 		{

 			if (strcasecmp(value, "yes") == 0)

 			{

 				g_restartAfterUpdate = true;

 				return ConfigResult_Accept;

 			}

 			else if (strcasecmp(value, "no") == 0)

 			{

 				g_restartAfterUpdate = false;

 				return ConfigResult_Accept;

 			}

 			return ConfigResult_Reject;

 		}

 		if (strcasecmp(key, "AutoUpdateServer") == 0)

 		{

 			UTIL_Format(g_serverAddress, sizeof(g_serverAddress), "%s", value);

 			return ConfigResult_Accept;

 		}

 		if (strcasecmp(key, "AutoUpdatePort") == 0)

 		{

 			int port = atoi(value);

 			if (!port)

 			{

 				return ConfigResult_Reject;

 			}

 			g_serverPort = port;

 			return ConfigResult_Accept;

 		}

 		return ConfigResult_Ignore;

 	}

 } g_InitFetch;

 BuildMD5ableBuffer::BuildMD5ableBuffer()

 {

 	stringTable = new BaseStringTable(2048);

 }

 BuildMD5ableBuffer::~BuildMD5ableBuffer()

 {

 	delete stringTable;

 }

 void BuildMD5ableBuffer::ReadSMC_ParseStart()

 {

 	stringTable->Reset();

 }

 SMCResult BuildMD5ableBuffer::ReadSMC_KeyValue(const SMCStates *states,

 											   const char *key,

 											   const char *value)

 {

 	stringTable->AddString(key);

 	stringTable->AddString(value);

 	return SMCResult_Continue;

 }

 SMCResult BuildMD5ableBuffer::ReadSMC_NewSection(const SMCStates *states, const char *name)

 {

 	stringTable->AddString(name);

 	return SMCResult_Continue;

 }

 void BuildMD5ableBuffer::ReadSMC_ParseEnd(bool halted, bool failed)

 {

 	if (halted || failed)

 	{

 		return;

 	}

 	void *data = stringTable->GetMemTable()->GetAddress(0);

 	if (data != NULL)

 	{

 		checksum->update((unsigned char *)data, stringTable->GetMemTable()->GetActualMemUsed());

 	}

 	checksum->finalize();

 }

 CON_COMMAND(sm_gamedata_md5, "Checks the MD5 sum for a given gamedata file")

 {

 #if SOURCE_ENGINE == SE_EPISODEONE

 	CCommand args;

 #endif

 	if (args.ArgC() < 2)

 	{

 		g_SMAPI->ConPrint("Usage: sm_gamedata_md5 <file>\n");

 		return;

 	}

 	const char *file = args.Arg(1);

 	if (!file || file[0] == '\0')

 	{

 		g_SMAPI->ConPrint("Usage: sm_gamedata_md5 <file>\n");

 		return;

 	}

 	SourceHook::CVector<FileData *>::iterator iter = g_FetchThread.filenames.begin();

 	FileData *curData;

 	while (iter != g_FetchThread.filenames.end())

 	{

 		curData = (*iter);

 		char fileName[30];

 		g_LibSys.GetFileFromPath(fileName, sizeof(fileName), curData->filename->c_str());

 		if (strcmpi(fileName, file) == 0)

 		{

 			g_SMAPI->ConPrintf("MD5 Sum: %s\n", curData->checksum);

 			return;

 		}

 		iter++;

 	}

 	g_SMAPI->ConPrint("File not found!\n");

 }

 FetcherThread::~FetcherThread()

 {

 	SourceHook::CVector<FileData *>::iterator iter = filenames.begin();

 	FileData *curData;

 	while (iter != filenames.end())

 	{

 		curData = (*iter);

 		delete curData->filename;

 		delete curData;

 		iter = filenames.erase(iter);

 	}

 }

 FetcherThread::FetcherThread() 

 {

 	memtable = new BaseMemTable(4096);

 	wasSuccess = false;

 	needsRestart = false;

 }