/**

  * vim: set ts=4 :

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

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

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

  *

  * This file is not open source and may not be copied without explicit

  * written permission of AlliedModders LLC.  This file may not be redistributed 

  * in whole or significant part.

  * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

  *

  * Version: $Id$

  */

 #ifndef _INCLUDE_SOURCEPAWN_VM_ENGINE_H_

 #define _INCLUDE_SOURCEPAWN_VM_ENGINE_H_

 #include "sp_vm_api.h"

 #include "sp_vm_function.h"

 struct TracedCall

 {

 	uint32_t cip;

 	uint32_t frm;

 	sp_context_t *ctx;

 	TracedCall *next;

 	unsigned int chain;

 };

 class CContextTrace : public IContextTrace

 {

 public:

 	CContextTrace(TracedCall *pStart, int error, const char *msg, uint32_t native);

 public:

 	int GetErrorCode();

 	const char *GetErrorString();

 	bool DebugInfoAvailable();

 	const char *GetCustomErrorString();

 	bool GetTraceInfo(CallStackInfo *trace);

 	void ResetTrace();

 	const char *GetLastNative(uint32_t *index);

 private:

 	int m_Error;

 	const char *m_pMsg;

 	TracedCall *m_pStart;

 	TracedCall *m_pIterator;

 	uint32_t m_Native;

 };

 class SourcePawnEngine : public ISourcePawnEngine

 {

 public:

 	SourcePawnEngine();

 	~SourcePawnEngine();

 public: //ISourcePawnEngine

 	sp_plugin_t *LoadFromFilePointer(FILE *fp, int *err);

 	sp_plugin_t *LoadFromMemory(void *base, sp_plugin_t *plugin, int *err);

 	int FreeFromMemory(sp_plugin_t *plugin);

 	IPluginContext *CreateBaseContext(sp_context_t *ctx);

 	void FreeBaseContext(IPluginContext *ctx);

 	void *BaseAlloc(size_t size);

 	void BaseFree(void *memory);

 	void *ExecAlloc(size_t size);

 	void ExecFree(void *address);

 	IDebugListener *SetDebugListener(IDebugListener *pListener);

 	unsigned int GetContextCallCount();

 public: //Debugger Stuff

 	/**

 	 * @brief Pushes a context onto the top of the call tracer.

 	 * 

 	 * @param ctx		Plugin context.

 	 */

 	void PushTracer(sp_context_t *ctx);

 	/**

 	 * @brief Pops a plugin off the call tracer.

 	 */

 	void PopTracer(int error, const char *msg);

 	/**

 	 * @brief Runs tracer from a debug break.

 	 */

 	void RunTracer(sp_context_t *ctx, uint32_t frame, uint32_t codeip);

 public: //Plugin function stuff

 	CFunction *GetFunctionFromPool(funcid_t f, IPluginContext  *plugin);

 	void ReleaseFunctionToPool(CFunction *func);

 private:

 	TracedCall *MakeTracedCall(bool new_chain);

 	void FreeTracedCall(TracedCall *pCall);

 private:

 	IDebugListener *m_pDebugHook;

 	TracedCall *m_FreedCalls;

 	TracedCall *m_CallStack;

 	unsigned int m_CurChain;

 	//CFunction *m_pFreeFuncs;

 };

 #endif //_INCLUDE_SOURCEPAWN_VM_ENGINE_H_