#include "ExtensionSys.h"

 #include "LibrarySys.h"

 #include "ShareSys.h"

 #include "CLogger.h"

 #include "sourcemm_api.h"

 #include "PluginSys.h"

 #include "sm_srvcmds.h"

 #include <stdlib.h>

 CExtensionManager g_Extensions;

 IdentityType_t g_ExtType;

 CExtension::CExtension(const char *filename, char *error, size_t err_max)

 {

 	m_File.assign(filename);

 	m_pAPI = NULL;

 	m_pIdentToken = NULL;

 	m_PlId = 0;

 	unload_code = 0;

 	m_FullyLoaded = false;

 	char path[PLATFORM_MAX_PATH+1];

 	g_SourceMod.BuildPath(Path_SM, path, PLATFORM_MAX_PATH, "extensions/%s", filename);

 	m_pLib = g_LibSys.OpenLibrary(path, error, err_max);

 	if (m_pLib == NULL)

 	{

 		return;

 	}

 	typedef IExtensionInterface *(*GETAPI)();

 	GETAPI pfnGetAPI = NULL;

 	if ((pfnGetAPI=(GETAPI)m_pLib->GetSymbolAddress("GetSMExtAPI")) == NULL)

 	{

 		m_pLib->CloseLibrary();

 		m_pLib = NULL;

 		snprintf(error, err_max, "Unable to find extension entry point");

 		return;

 	}

 	m_pAPI = pfnGetAPI();

 	if (!m_pAPI || m_pAPI->GetExtensionVersion() > SMINTERFACE_EXTENSIONAPI_VERSION)

 	{

 		m_pLib->CloseLibrary();

 		m_pLib = NULL;

 		snprintf(error, err_max, "Extension version is too new to load (%d, max is %d)", m_pAPI->GetExtensionVersion(), SMINTERFACE_EXTENSIONAPI_VERSION);

 		return;

 	}

 	if (m_pAPI->IsMetamodExtension())

 	{

 		bool already;

 		m_PlId = g_pMMPlugins->Load(path, g_PLID, already, error, err_max);

 	}

 	m_pIdentToken = g_ShareSys.CreateIdentity(g_ExtType);

 	if (!m_pAPI->OnExtensionLoad(this, &g_ShareSys, error, err_max, !g_SourceMod.IsMapLoading()))

 	{

 		if (m_pAPI->IsMetamodExtension())

 		{

 			if (m_PlId)

 			{

 				char dummy[255];

 				g_pMMPlugins->Unload(m_PlId, true, dummy, sizeof(dummy));

 				m_PlId = 0;

 			}

 		}

 		m_pAPI = NULL;

 		m_pLib->CloseLibrary();

 		m_pLib = NULL;

 		g_ShareSys.DestroyIdentity(m_pIdentToken);

 		m_pIdentToken = NULL;

 		return;

 	} else {

 		/* Check if we're past load time */

 		if (!g_SourceMod.IsMapLoading())

 		{

 			m_pAPI->OnExtensionsAllLoaded();

 		}

 	}

 }

 CExtension::~CExtension()

 {

 	if (m_pAPI)

 	{

 		m_pAPI->OnExtensionUnload();

 		if (m_PlId)

 		{

 			g_pMMPlugins->Unload(m_PlId, true, NULL, 0);

 		}

 	}

 	if (m_pIdentToken)

 	{

 		g_ShareSys.DestroyIdentity(m_pIdentToken);

 	}

 	if (m_pLib)

 	{

 		m_pLib->CloseLibrary();

 	}

 }

 void CExtension::MarkAllLoaded()

 {

 	assert(m_FullyLoaded == false);

 	if (!m_FullyLoaded)

 	{

 		m_FullyLoaded = true;

 		m_pAPI->OnExtensionsAllLoaded();

 	}

 }

 void CExtension::AddPlugin(IPlugin *pPlugin)

 {

 	m_Plugins.push_back(pPlugin);

 }

 void CExtension::RemovePlugin(IPlugin *pPlugin)

 {

 	m_Plugins.remove(pPlugin);

 }

 void CExtension::SetError(const char *error)

 {

 	m_Error.assign(error);

 }

 IExtensionInterface *CExtension::GetAPI()

 {

 	return m_pAPI;

 }

 const char *CExtension::GetFilename()

 {

 	return m_File.c_str();

 }

 IdentityToken_t *CExtension::GetIdentity()

 {

 	return m_pIdentToken;

 }

 bool CExtension::IsLoaded()

 {

 	return (m_pLib != NULL);

 }

 void CExtension::AddDependency(IfaceInfo *pInfo)

 {

 	m_Deps.push_back(*pInfo);

 }

 ITERATOR *CExtension::FindFirstDependency(IExtension **pOwner, SMInterface **pInterface)

 {

 	List<IfaceInfo>::iterator iter = m_Deps.begin();

 	if (iter == m_Deps.end())

 	{

 		return NULL;

 	}

 	if (pOwner)

 	{

 		*pOwner = (*iter).owner;

 	}

 	if (pInterface)

 	{

 		*pInterface = (*iter).iface;

 	}

 	List<IfaceInfo>::iterator *pIter = new List<IfaceInfo>::iterator(iter);

 	return (ITERATOR *)pIter;

 }

 bool CExtension::FindNextDependency(ITERATOR *iter, IExtension **pOwner, SMInterface **pInterface)

 {

 	List<IfaceInfo>::iterator *pIter = (List<IfaceInfo>::iterator *)iter;

 	List<IfaceInfo>::iterator _iter;

 	if (_iter == m_Deps.end())

 	{

 		return false;

 	}

 	_iter++;

 	if (pOwner)

 	{

 		*pOwner = (*_iter).owner;

 	}

 	if (pInterface)

 	{

 		*pInterface = (*_iter).iface;

 	}

 	*pIter = _iter;

 	if (_iter == m_Deps.end())

 	{

 		return false;

 	}

 	return true;

 }

 void CExtension::FreeDependencyIterator(ITERATOR *iter)

 {

 	List<IfaceInfo>::iterator *pIter = (List<IfaceInfo>::iterator *)iter;

 	delete pIter;

 }

 void CExtension::AddInterface(SMInterface *pInterface)

 {

 	m_Interfaces.push_back(pInterface);

 }

 bool CExtension::IsRunning(char *error, size_t maxlength)

 {

 	if (!IsLoaded())

 	{

 		if (error)

 		{

 			snprintf(error, maxlength, "%s", m_Error.c_str());

 		}

 		return false;

 	}

 	return m_pAPI->QueryRunning(error, maxlength);

 }

 /*********************

  * EXTENSION MANAGER *

  *********************/

 void CExtensionManager::OnSourceModAllInitialized()

 {

 	g_ExtType = g_ShareSys.CreateIdentType("EXTENSION");

 	g_PluginSys.AddPluginsListener(this);

 	g_RootMenu.AddRootConsoleCommand("exts", "Manage extensions", this);

 }

 void CExtensionManager::OnSourceModShutdown()

 {

 	g_RootMenu.RemoveRootConsoleCommand("exts", this);

 	g_PluginSys.RemovePluginsListener(this);

 	g_ShareSys.DestroyIdentType(g_ExtType);

 }

 IExtension *CExtensionManager::LoadAutoExtension(const char *path)

 {

 	if (!strstr(path, "." PLATFORM_LIB_EXT))

 	{

 		char newpath[PLATFORM_MAX_PATH+1];

 		snprintf(newpath, PLATFORM_MAX_PATH, "%s.%s", path, PLATFORM_LIB_EXT);

 		return LoadAutoExtension(newpath);

 	}

 	IExtension *pAlready;

 	if ((pAlready=FindExtensionByFile(path)) != NULL)

 	{

 		return pAlready;

 	}

 	char error[256];

 	CExtension *p = new CExtension(path, error, sizeof(error));

 	if (!p->IsLoaded())

 	{

 		g_Logger.LogError("[SM] Unable to load extension \"%s\": %s", path, error);

 		p->SetError(error);

 	}

 	m_Libs.push_back(p);

 	return p;

 }

 IExtension *CExtensionManager::FindExtensionByFile(const char *file)

 {

 	List<CExtension *>::iterator iter;

 	CExtension *pExt;

 	if (!strstr(file, "." PLATFORM_LIB_EXT))

 	{

 		char path[PLATFORM_MAX_PATH];

 		snprintf(path, PLATFORM_MAX_PATH, "%s.%s", file, PLATFORM_LIB_EXT);

 		return FindExtensionByFile(path);

 	}

 	/* Make sure the file direction is right */

 	char path[PLATFORM_MAX_PATH+1];

 	g_LibSys.PathFormat(path, PLATFORM_MAX_PATH, "%s", file);

 	for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 	{

 		pExt = (*iter);

 		if (strcmp(pExt->GetFilename(), path) == 0)

 		{

 			return pExt;

 		}

 	}

 	return NULL;

 }

 IExtension *CExtensionManager::FindExtensionByName(const char *ext)

 {

 	List<CExtension *>::iterator iter;

 	CExtension *pExt;

 	IExtensionInterface *pAPI;

 	const char *name;

 	for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 	{

 		pExt = (*iter);

 		if (!pExt->IsLoaded())

 		{

 			continue;

 		}

 		if ((pAPI = pExt->GetAPI()) == NULL)

 		{

 			continue;

 		}

 		name = pAPI->GetExtensionName();

 		if (!name)

 		{

 			continue;

 		}

 		if (strcmp(name, ext) == 0)

 		{

 			return pExt;

 		}

 	}

 	return NULL;

 }

 IExtension *CExtensionManager::LoadExtension(const char *file, ExtensionLifetime lifetime, char *error, size_t err_max)

 {

 	IExtension *pAlready;

 	if ((pAlready=FindExtensionByFile(file)) != NULL)

 	{

 		return pAlready;

 	}

 	CExtension *pExt = new CExtension(file, error, err_max);

 	/* :NOTE: lifetime is currently ignored */

 	if (!pExt->IsLoaded())

 	{

 		delete pExt;

 		return NULL;

 	}

 	/* :TODO: do QueryRunning check if the map is loaded */

 	m_Libs.push_back(pExt);

 	return pExt;

 }

 void CExtensionManager::BindDependency(IExtension *pOwner, IfaceInfo *pInfo)

 {

 	CExtension *pExt = (CExtension *)pOwner;

 	pExt->AddDependency(pInfo);

 }

 void CExtensionManager::AddInterface(IExtension *pOwner, SMInterface *pInterface)

 {

 	CExtension *pExt = (CExtension *)pOwner;

 	pExt->AddInterface(pInterface);

 }

 void CExtensionManager::BindChildPlugin(IExtension *pParent, IPlugin *pPlugin)

 {

 	CExtension *pExt = (CExtension *)pParent;

 	pExt->AddPlugin(pPlugin);

 }

 void CExtensionManager::OnPluginDestroyed(IPlugin *plugin)

 {

 	List<CExtension *>::iterator iter;

 	for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 	{

 		(*iter)->RemovePlugin(plugin);

 	}

 }

 CExtension *CExtensionManager::FindByOrder(unsigned int num)

 {

 	if (num < 1 || num > m_Libs.size())

 	{

 		return NULL;

 	}

 	List<CExtension *>::iterator iter = m_Libs.begin();

 	while (iter != m_Libs.end())

 	{

 		if (--num == 0)

 		{

 			return (*iter);

 		}

 		iter++;

 	}

 	return NULL;

 }

 void CExtensionManager::BindAllNativesToPlugin(IPlugin *pPlugin)

 {

 	List<CExtension *>::iterator iter;

 	CExtension *pExt;

 	IPluginContext *pContext = pPlugin->GetBaseContext();

 	for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 	{

 		pExt = (*iter);

 		if (!pExt->IsLoaded())

 		{

 			continue;

 		}

 		if (!pExt->m_Natives.size())

 		{

 			continue;

 		}

 		bool set = false;

 		List<const sp_nativeinfo_t *>::iterator n_iter;

 		const sp_nativeinfo_t *natives;

 		for (n_iter = pExt->m_Natives.begin();

 			 n_iter != pExt->m_Natives.end();

 			 n_iter++)

 		{

 			natives = (*n_iter);

 			unsigned int i=0;

 			while (natives[i].func != NULL && natives[i].name != NULL)

 			{

 				if (pContext->BindNative(&natives[i++]) == SP_ERROR_NONE)

 				{

 					set = true;

 				}

 			}

 		}

 		if (set && (pExt->m_Plugins.find(pPlugin) == pExt->m_Plugins.end()))

 		{

 			/* For now, mark this plugin as a requirement.  Later we'll introduce native filtering. */

 			pExt->m_Plugins.push_back(pPlugin);

 		}

 	}

 }

 bool CExtensionManager::UnloadExtension(IExtension *_pExt)

 {

 	if (!_pExt)

 	{

 		return false;

 	}

 	CExtension *pExt = (CExtension *)_pExt;

 	if (m_Libs.find(pExt) == m_Libs.end())

 	{

 		return false;

 	}

 	/* First remove us from internal lists */

 	g_ShareSys.RemoveInterfaces(_pExt);

 	m_Libs.remove(pExt);

 	List<CExtension *> UnloadQueue;

 	/* Handle dependencies */

 	if (pExt->IsLoaded())

 	{

 		/* Unload any dependent plugins */

 		List<IPlugin *>::iterator p_iter = pExt->m_Plugins.begin();

 		while (p_iter != pExt->m_Plugins.end())

 		{

 			/* We have to manually unlink ourselves here, since we're no longer being managed */

 			g_PluginSys.UnloadPlugin((*p_iter));

 			p_iter = pExt->m_Plugins.erase(p_iter);

 		}

 		/* Notify and/or unload all dependencies */

 		List<CExtension *>::iterator c_iter;

 		CExtension *pDep;

 		IExtensionInterface *pAPI;

 		for (c_iter = m_Libs.begin(); c_iter != m_Libs.end(); c_iter++)

 		{

 			pDep = (*c_iter);

 			if ((pAPI=pDep->GetAPI()) == NULL)

 			{

 				continue;

 			}

 			if (pDep == pExt)

 			{

 				continue;

 			}

 			/* Now, get its dependency list */

 			bool dropped = false;

 			List<IfaceInfo>::iterator i_iter = pDep->m_Deps.begin();

 			while (i_iter != pDep->m_Deps.end())

 			{

 				if ((*i_iter).owner == _pExt)

 				{

 					if (!dropped && !pAPI->QueryInterfaceDrop((*i_iter).iface))

 					{

 						dropped = true;

 					}

 					pAPI->NotifyInterfaceDrop((*i_iter).iface);

 					i_iter = pDep->m_Deps.erase(i_iter);

 				} else {

 					i_iter++;

 				}

 			}

 		}

 	}

 	List<CExtension *>::iterator iter;

 	for (iter=UnloadQueue.begin(); iter!=UnloadQueue.end(); iter++)

 	{

 		/* NOTE: This is safe because the unload function backs out of anything not present */

 		UnloadExtension((*iter));

 	}

 	return true;

 }

 void CExtensionManager::AddNatives(IExtension *pOwner, const sp_nativeinfo_t *natives)

 {

 	CExtension *pExt = (CExtension *)pOwner;

 	pExt->m_Natives.push_back(natives);

 }

 void CExtensionManager::MarkAllLoaded()

 {

 	List<CExtension *>::iterator iter;

 	CExtension *pExt;

 	for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 	{

 		pExt = (*iter);

 		if (!pExt->IsLoaded())

 		{

 			continue;

 		}

 		if (pExt->m_FullyLoaded)

 		{

 			continue;

 		}

 		pExt->MarkAllLoaded();

 	}

 }

 void CExtensionManager::OnRootConsoleCommand(const char *cmd, unsigned int argcount)

 {

 	if (argcount >= 3)

 	{

 		const char *cmd = g_RootMenu.GetArgument(2);

 		if (strcmp(cmd, "list") == 0)

 		{

 			List<CExtension *>::iterator iter;

 			CExtension *pExt;

 			unsigned int num = 1;

 			switch (m_Libs.size())

 			{

 			case 1:

 				{

 					g_RootMenu.ConsolePrint("[SM] Displaying 1 extension:");

 					break;

 				}

 			case 0:

 				{

 					g_RootMenu.ConsolePrint("[SM] No extensions are loaded.");

 					break;

 				}

 			default:

 				{

 					g_RootMenu.ConsolePrint("[SM] Displaying %d extensions:", m_Libs.size());

 					break;

 				}

 			}

 			for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++,num++)

 			{

 				pExt = (*iter);

 				if (pExt->IsLoaded())

 				{

 					char error[255];

 					if (!pExt->IsRunning(error, sizeof(error)))

 					{

 						g_RootMenu.ConsolePrint("[%02d] <FAILED> file \"%s\": %s", num, pExt->GetFilename(), error);

 					} else {

 						IExtensionInterface *pAPI = pExt->GetAPI();

 						const char *name = pAPI->GetExtensionName();

 						const char *version = pAPI->GetExtensionVerString();

 						const char *descr = pAPI->GetExtensionDescription();

 						g_RootMenu.ConsolePrint("[%02d] %s (%s): %s", num, name, version, descr);

 					}

 				} else {

 					g_RootMenu.ConsolePrint("[%02d] <FAILED> file \"%s\": %s", num, pExt->GetFilename(), pExt->m_Error.c_str());

 				}

 			}

 			return;

 		} else if (strcmp(cmd, "info") == 0) {

 			if (argcount < 4)

 			{

 				g_RootMenu.ConsolePrint("[SM] Usage: sm info <#>");

 				return;

 			}

 			const char *sId = g_RootMenu.GetArgument(3);

 			unsigned int id = atoi(sId);

 			if (id <= 0)

 			{

 				g_RootMenu.ConsolePrint("[SM] Usage: sm info <#>");

 				return;

 			}

 			if (m_Libs.size() == 0)

 			{

 				g_RootMenu.ConsolePrint("[SM] No extensions are loaded.");

 				return;

 			}

 			if (id > m_Libs.size())

 			{

 				g_RootMenu.ConsolePrint("[SM] No extension was found with id %d.", id);

 				return;

 			}

 			List<CExtension *>::iterator iter = m_Libs.begin();

 			CExtension *pExt = NULL;

 			while (iter != m_Libs.end())

 			{

 				if (--id == 0)

 				{

 					pExt = (*iter);

 					break;

 				}

 				iter++;

 			}

 			/* This should never happen */

 			if (!pExt)

 			{

 				g_RootMenu.ConsolePrint("[SM] No extension was found with id %d.", id);

 				return;

 			}

 			if (!pExt->IsLoaded())

 			{

 				g_RootMenu.ConsolePrint(" File: %s", pExt->GetFilename());

 				g_RootMenu.ConsolePrint(" Loaded: No (%s)", pExt->m_Error.c_str());

 			} else {

 				char error[255];

 				if (!pExt->IsRunning(error, sizeof(error)))

 				{

 					g_RootMenu.ConsolePrint(" File: %s", pExt->GetFilename());

 					g_RootMenu.ConsolePrint(" Loaded: Yes");

 					g_RootMenu.ConsolePrint(" Running: No (%s)", error);

 				} else {

 					IExtensionInterface *pAPI = pExt->GetAPI();

 					g_RootMenu.ConsolePrint(" File: %s", pExt->GetFilename());

 					g_RootMenu.ConsolePrint(" Loaded: Yes (version %s)", pAPI->GetExtensionVerString());

 					g_RootMenu.ConsolePrint(" Name: %s (%s)", pAPI->GetExtensionName(), pAPI->GetExtensionDescription());

 					g_RootMenu.ConsolePrint(" Author: %s (%s)", pAPI->GetExtensionAuthor(), pAPI->GetExtensionURL());

 					g_RootMenu.ConsolePrint(" Binary info: API version %d (compiled %s)", pAPI->GetExtensionVersion(), pAPI->GetExtensionDateString());

 					g_RootMenu.ConsolePrint(" Metamod enabled: %s", pAPI->IsMetamodExtension() ? "yes" : "no");

 				}

 			}

 			return;

 		} else if (strcmp(cmd, "unload") == 0) {

 			if (argcount < 4)

 			{

 				g_RootMenu.ConsolePrint("[SM] Usage: sm unload <#> [code]");

 				return;

 			}

 			const char *arg = g_RootMenu.GetArgument(3);

 			unsigned int num = atoi(arg);

 			CExtension *pExt = FindByOrder(num);

 			if (!pExt)

 			{

 				g_RootMenu.ConsolePrint("[SM] Extension number %d was not found.", num);

 				return;

 			}

 			if (argcount > 4 && pExt->unload_code)

 			{

 				const char *unload = g_RootMenu.GetArgument(4);

 				if (pExt->unload_code == atoi(unload))

 				{

 					char filename[PLATFORM_MAX_PATH+1];

 					snprintf(filename, PLATFORM_MAX_PATH, "%s", pExt->GetFilename());

 					UnloadExtension(pExt);

 					g_RootMenu.ConsolePrint("[SM] Extension %s is now unloaded.", filename);

 				} else {

 					g_RootMenu.ConsolePrint("[SM] Please try again, the correct unload code is \"%d\"", pExt->unload_code);

 				}

 				return;

 			}

 			if (!pExt->IsLoaded() 

 				|| (!pExt->m_Deps.size() && !pExt->m_Plugins.size()))

 			{

 				char filename[PLATFORM_MAX_PATH+1];

 				snprintf(filename, PLATFORM_MAX_PATH, "%s", pExt->GetFilename());

 				UnloadExtension(pExt);

 				g_RootMenu.ConsolePrint("[SM] Extension %s is now unloaded.", filename);

 				return;

 			} else {

 				List<IPlugin *> plugins;

 				if (pExt->m_Deps.size())

 				{

 					g_RootMenu.ConsolePrint("[SM] Unloading %s will unload the following extensions: ", pExt->GetFilename());

 					List<CExtension *>::iterator iter;

 					CExtension *pOther;

 					/* Get list of all extensions */

 					for (iter=m_Libs.begin(); iter!=m_Libs.end(); iter++)

 					{

 						List<IfaceInfo>::iterator i_iter;

 						pOther = (*iter);

 						if (!pOther->IsLoaded() || pOther == pExt)

 						{

 							continue;

 						}

 						/* Get their dependencies */

 						for (i_iter=pOther->m_Deps.begin();

 							 i_iter!=pOther->m_Deps.end();

 							 i_iter++)

 						{

 							/* Is this dependency to us? */

 							if ((*i_iter).owner != pExt)

 							{

 								continue;

 							}

 							/* Will our dependent care? */

 							if (!pExt->GetAPI()->QueryInterfaceDrop((*i_iter).iface))

 							{

 								g_RootMenu.ConsolePrint(" -> %s", pExt->GetFilename());

 								/* Add to plugin unload list */

 								List<IPlugin *>::iterator p_iter;

 								for (p_iter=pOther->m_Plugins.begin();

 									 p_iter!=pOther->m_Plugins.end();

 									 p_iter++)

 								{

 									if (plugins.find((*p_iter)) == plugins.end())

 									{

 										plugins.push_back((*p_iter));

 									}

 								}

 							}

 						}

 					}

 				}

 				if (pExt->m_Plugins.size())

 				{

 					g_RootMenu.ConsolePrint("[SM] Unloading %s will unload the following plugins: ", pExt->GetFilename());

 					List<IPlugin *>::iterator iter;

 					IPlugin *pPlugin;

 					for (iter = pExt->m_Plugins.begin(); iter != pExt->m_Plugins.end(); iter++)

 					{

 						pPlugin = (*iter);

 						if (plugins.find(pPlugin) == plugins.end())

 						{

 							plugins.push_back(pPlugin);

 						}

 					}

 					for (iter = plugins.begin(); iter != plugins.end(); iter++)

 					{

 						pPlugin = (*iter);

 						g_RootMenu.ConsolePrint(" -> %s", pPlugin->GetFilename());

 					}

 				}

 				srand(static_cast<int>(time(NULL)));

 				pExt->unload_code = (rand() % 877) + 123;	//123 to 999

 				g_RootMenu.ConsolePrint("[SM] To verify unloading %s, please use the following: ", pExt->GetFilename());

 				g_RootMenu.ConsolePrint("[SM] sm exts unload %d %d", num, pExt->unload_code);

 				return;

 			}

 		}

 	}

 	g_RootMenu.ConsolePrint("SourceMod Extensions Menu:");

 	g_RootMenu.DrawGenericOption("info", "Extra extension information");

 	g_RootMenu.DrawGenericOption("list", "List extensions");

 	g_RootMenu.DrawGenericOption("unload", "Unload an extension");

 }