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diff --git a/SrcShared/EmStructs.h b/SrcShared/EmStructs.h
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+/* -*- mode: C++; tab-width: 4 -*- */
+/* ===================================================================== *\
+	Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries.
+	All rights reserved.
+
+	This file is part of the Palm OS Emulator.
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+\* ===================================================================== */
+
+#ifndef EmStructs_h
+#define EmStructs_h
+
+#include "EmFileRef.h"			// EmFileRef
+#include "EmDevice.h"			// EmDevice
+#include "EmTypes.h"			// GremlinEventType, EventIDType
+
+#include <deque>
+#include <map>
+#include <string>
+#include <vector>
+
+// ---------- Collections ----------
+
+typedef vector<ScaleType>		ScaleList;
+typedef vector<RAMSizeType>		RAMSizeList;
+
+typedef vector<uint8>			ByteList;
+typedef vector<string>			StringList;
+
+typedef map<string, string>		StringStringMap;
+typedef vector<CloseActionType>	CloseActionList;
+typedef vector<LoggingType>		LoggingList;
+
+
+// ---------- RGBType ----------
+
+struct RGBType
+{
+	RGBType (void) {}
+	RGBType (uint8 red, uint8 green, uint8 blue) :
+		fRed (red),
+		fGreen (green),
+		fBlue (blue)
+	{}
+
+	bool operator== (const RGBType& rhs) const
+	{
+		return fRed == rhs.fRed && fGreen == rhs.fGreen && fBlue == rhs.fBlue;
+	}
+
+	bool operator!= (const RGBType& rhs) const
+	{
+		return !(*this == rhs);
+	}
+
+	uint8		fRed;
+	uint8		fGreen;
+	uint8		fBlue;
+	uint8		fFiller;	// Pad this out to 4 bytes to make array lookups more efficient.
+};
+typedef vector<RGBType>	RGBList;
+
+
+// ---------- SystemCallContext ----------
+
+struct SystemCallContext
+{
+	emuptr		fPC;			// PC at which the system call was made.
+	emuptr		fNextPC;		// PC of instruction after system call.
+	emuptr		fDestPC1;		// Address of system function (in the trap table).
+	emuptr		fDestPC2;		// Address of system function (if subdispatching is involved).
+	uint16		fTrapWord;		// Trapword, even for SYSTRAP_FAST calls.
+	uint16		fTrapIndex;		// Trapword with the high 4 bits removed.
+	emuptr		fExtra;			// RefNum for library calls, D2 for "dispatch" calls.
+	Bool		fViaTrap;		// True if called via TRAP $F.
+	Bool		fViaJsrA1;		// True if called via SYSTRAP_FASTER.
+
+	long		fError;			// If an error occurred getting the context, error is here
+	long		fLibIndex;		// Resource base number for function name
+	long		fMaxRefNum;		// If the refNum was too big, this is the max value it could be.
+};
+typedef vector<SystemCallContext>	SystemCallContextList;
+
+
+// ---------- DatabaseInfo ----------
+
+struct DatabaseInfo
+{
+	UInt32		creator;
+	UInt32		type;
+	UInt16		version;
+	LocalID		dbID;
+	UInt16 		cardNo;
+	UInt32		modDate;
+	UInt16		dbAttrs;
+
+	char		name[dmDBNameLength];
+	char		dbName[dmDBNameLength];
+
+	Bool operator < (const DatabaseInfo& other) const
+		{ if (creator < other.creator) return true;
+		  if (creator > other.creator) return false;
+		  if (type < other.type) return true;
+		  return false; }
+
+	Bool operator == (const DatabaseInfo& other) const
+		{ return (creator == other.creator) &&
+				 (type == other.type); }
+};
+typedef vector<DatabaseInfo>	DatabaseInfoList;
+
+
+// ---------- SlotInfoType ----------
+
+struct SlotInfoType
+{
+	long		fSlotNumber;
+	Bool		fSlotOccupied;
+	EmDirRef	fSlotRoot;
+};
+typedef vector<SlotInfoType>	SlotInfoList;
+
+
+// ---------- Configuration ----------
+
+struct Configuration
+{
+	Configuration () :
+		fDevice (),
+		fRAMSize (1024),
+		fROMFile ()
+	{
+	}
+
+	Configuration (const Configuration& cfg) :
+		fDevice (cfg.fDevice),
+		fRAMSize (cfg.fRAMSize),
+		fROMFile (cfg.fROMFile)
+	{
+	}
+
+	Configuration (const EmDevice& dt, long size, const EmFileRef& rom) :
+		fDevice (dt),
+		fRAMSize (size),
+		fROMFile (rom)
+	{
+	}
+
+	Bool IsValid (void) const
+	{
+		// Return whether or not the configuration looks 
+		// valid.
+
+		if (!fDevice.Supported ())
+			return false;
+
+		if (fRAMSize <= 0)
+			return false;
+
+		if (!fROMFile.IsSpecified ())
+			return false;
+
+		if (!fROMFile.Exists ())
+			return false;
+
+		if (!fDevice.SupportsROM (fROMFile))
+			return false;
+
+		return true;
+	}
+
+	EmDevice				fDevice;
+	RAMSizeType				fRAMSize;
+	EmFileRef				fROMFile;
+};
+typedef vector<Configuration>	ConfigurationList;
+
+
+// ---------- GremlinInfo ----------
+
+struct GremlinInfo
+{
+	GremlinInfo () :
+		fNumber (0),
+		fSteps (-1),
+		fFinal (-1),
+		fSaveFrequency (10000),
+		fAppList ()
+	{
+	}
+
+	long				fNumber;
+	long				fSteps;
+	long				fFinal;
+	long				fSaveFrequency;
+	DatabaseInfoList	fAppList;
+};
+typedef vector<GremlinInfo>	GremlinInfoList;
+
+
+// ---------- HordeInfo ----------
+
+struct HordeInfo
+{
+	HordeInfo () :
+		fStartNumber (0),
+		fStopNumber (0),
+		fDepthSwitch (30000),
+		fDepthSave (10000),
+		fDepthStop (1000000),
+		fCanSwitch (false),
+		fCanSave (false),
+		fCanStop (false),
+		fAppList (),
+		fSaveFrequency (0),	// Rewritten in c'tor
+		fSwitchDepth (0),	// Rewritten in c'tor
+		fMaxDepth (0),		// Rewritten in c'tor
+		fFirstLaunchedAppName ("")
+	{
+		NewToOld ();
+	}
+
+	long				fStartNumber;
+	long				fStopNumber;
+
+	long				fDepthSwitch;
+	long				fDepthSave;
+	long				fDepthStop;
+
+	Bool				fCanSwitch;
+	Bool				fCanSave;
+	Bool				fCanStop;
+
+	DatabaseInfoList	fAppList;
+
+	// Old fields that I want to get rid of, but
+	// I need to update Gremlins and Hordes first.
+
+	long				fSaveFrequency;
+	long				fSwitchDepth;
+	long				fMaxDepth;
+
+	// New field added so that the first application
+	// to be launched can be specified
+
+	string				fFirstLaunchedAppName;
+
+	void NewToOld (void)
+	{
+		fSwitchDepth	= fCanSwitch ? fDepthSwitch : -1;
+		fSaveFrequency	= fCanSave ? fDepthSave : 0;
+		fMaxDepth		= fCanStop ? fDepthStop : -1;
+	}
+
+	void OldToNew (void)
+	{
+		fCanSwitch = fSwitchDepth > 0;
+		fDepthSwitch = fCanSwitch ? fSwitchDepth : 30000;
+
+		fCanSave = fSaveFrequency > 0;
+		fDepthSave = fCanSave ? fSaveFrequency : 10000;
+
+		fCanStop = fMaxDepth > 0;
+		fDepthStop = fCanStop ? fMaxDepth : 1000000;
+	}
+};
+typedef vector<HordeInfo>	HordeInfoList;
+
+
+// ---------- EmGremlinThreadInfo ----------
+
+struct EmGremlinThreadInfo
+{
+	Bool	fHalted;
+	Int32	fErrorEvent;
+	StrCode	fMessageID;
+};
+
+
+// ---------- EmGremlinErrorFrequencyInfo ----------
+
+struct EmGremlinErrorFrequencyInfo
+{
+	Int32	fCount;
+	Int32	fErrorFrequency;
+	Int32	fFirstErrantGremlinIndex;
+};
+
+
+// ---------- SysLibTblEntryTypeV10 ----------
+
+typedef struct SysLibTblEntryTypeV10 {
+	MemPtr*			dispatchTblP;					// pointer to library dispatch table
+	void*			globalsP;						// Library globals
+	} SysLibTblEntryTypeV10;
+typedef SysLibTblEntryTypeV10*	SysLibTblEntryV10Ptr;
+
+
+// ---------- EmStackFrame ----------
+
+struct EmStackFrame
+{
+	emuptr	fAddressInFunction;
+	emuptr	fA6;
+};
+
+typedef vector<EmStackFrame>	EmStackFrameList;
+
+
+
+#endif	// EmStructs_h