/**

  * 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: $Id$

  */

 #ifndef _INCLUDE_SOURCEMOD_SHARESYSTEM_H_

 #define _INCLUDE_SOURCEMOD_SHARESYSTEM_H_

 #include <IShareSys.h>

 #include <IHandleSys.h>

 #include <sh_list.h>

 #include <sm_trie_tpl.h>

 #include "common_logic.h"

 using namespace SourceHook;

 namespace SourceMod

 {

 	struct IdentityToken_t

 	{

 		Handle_t ident;

 		void *ptr;

 		IdentityType_t type;

 	};

 };

 struct IfaceInfo

 {

 	bool operator ==(const IfaceInfo &info)

 	{

 		return (info.iface == iface && info.owner == owner);

 	}

 	SMInterface *iface;

 	IExtension *owner;

 };

 class CNativeOwner;

 struct NativeEntry;

 class CPlugin;

 struct ReplaceNative

 {

 	CNativeOwner *owner;

 	SPVM_NATIVE_FUNC func;

 };

 struct FakeNative

 {

 	char name[64];

 	IPluginContext *ctx;

 	IPluginFunction *call;

 };

 struct NativeEntry

 {

 	CNativeOwner *owner;

 	SPVM_NATIVE_FUNC func;

 	const char *name;

 	ReplaceNative replacement;

 	FakeNative *fake;

 };

 struct Capability

 {

 	IExtension *ext;

 	IFeatureProvider *provider;

 };

 class ShareSystem :

 	public IShareSys,

 	public SMGlobalClass,

 	public IHandleTypeDispatch

 {

 	friend class CNativeOwner;

 public:

 	ShareSystem();

 public: //IShareSys

 	bool AddInterface(IExtension *myself, SMInterface *pIface);

 	bool RequestInterface(const char *iface_name, 

 		unsigned int iface_vers,

 		IExtension *myself,

 		SMInterface **pIface);

 	void AddNatives(IExtension *myself, const sp_nativeinfo_t *natives);

 	IdentityType_t CreateIdentType(const char *name);

 	IdentityType_t FindIdentType(const char *name);

 	IdentityToken_t *CreateIdentity(IdentityType_t type, void *ptr);

 	void DestroyIdentType(IdentityType_t type);

 	void DestroyIdentity(IdentityToken_t *identity);

 	void AddDependency(IExtension *myself, const char *filename, bool require, bool autoload);

 	void RegisterLibrary(IExtension *myself, const char *name);

 	void OverrideNatives(IExtension *myself, const sp_nativeinfo_t *natives);

 	void AddCapabilityProvider(IExtension *myself, IFeatureProvider *provider,

 		                       const char *name);

 	void DropCapabilityProvider(IExtension *myself, IFeatureProvider *provider,

 		                        const char *name);

 public: //SMGlobalClass

 	/* Pre-empt in case anything tries to register idents early */

 	void Initialize();

 	void OnSourceModShutdown();

 public: //IHandleTypeDispatch

 	void OnHandleDestroy(HandleType_t type, void *object);

 public:

 	IdentityToken_t *CreateCoreIdentity();

 	void RemoveInterfaces(IExtension *pExtension);

 	FeatureStatus TestFeature(IPluginRuntime *pRuntime, FeatureType feature, const char *name);

 	FeatureStatus TestNative(IPluginRuntime *pRuntime, const char *name);

 	FeatureStatus TestCap(const char *name);

 public:

 	inline IdentityToken_t *GetIdentRoot()

 	{

 		return &m_IdentRoot;

 	}

 public:

 	void BindNativesToPlugin(CPlugin *pPlugin, bool bCoreOnly);

 	void BindNativeToPlugin(CPlugin *pPlugin, NativeEntry *pEntry);

 	NativeEntry *AddFakeNative(IPluginFunction *pFunc, const char *name, SPVM_FAKENATIVE_FUNC func);

 	NativeEntry *FindNative(const char *name);

 private:

 	NativeEntry *AddNativeToCache(CNativeOwner *pOwner, const sp_nativeinfo_t *ntv);

 	void ClearNativeFromCache(CNativeOwner *pOwner, const char *name);

 	void BindNativeToPlugin(CPlugin *pPlugin, 

 		sp_native_t *ntv, 

 		uint32_t index, 

 		NativeEntry *pEntry);

 private:

 	List<IfaceInfo> m_Interfaces;

 	HandleType_t m_TypeRoot;

 	IdentityToken_t m_IdentRoot;

 	HandleType_t m_IfaceType;

 	IdentityType_t m_CoreType;

 	KTrie<NativeEntry *> m_NtvCache;

 	KTrie<Capability> m_caps;

 };

 extern ShareSystem g_ShareSys;

 #endif //_INCLUDE_SOURCEMOD_SHARESYSTEM_H_