ADL: Implement hires5 savegames

4 files changed, 171 insertions, 69 deletions

diff --git a/engines/adl/adl.cpp b/engines/adl/adl.cpp
index 81950450ab..e223fea606 100644
--- a/engines/adl/adl.cpp
+++ b/engines/adl/adl.cpp
@@ -676,6 +676,49 @@ bool AdlEngine::hasFeature(EngineFeature f) const {
 	}
 }
 
+void AdlEngine::loadState(Common::ReadStream &stream) {
+	_state.room = stream.readByte();
+	_state.moves = stream.readByte();
+	_state.isDark = stream.readByte();
+	_state.time.hours = stream.readByte();
+	_state.time.minutes = stream.readByte();
+
+	uint32 size = stream.readUint32BE();
+	if (size != _state.rooms.size())
+		error("Room count mismatch (expected %i; found %i)", _state.rooms.size(), size);
+
+	for (uint i = 0; i < size; ++i) {
+		_state.rooms[i].picture = stream.readByte();
+		_state.rooms[i].curPicture = stream.readByte();
+		_state.rooms[i].isFirstTime = stream.readByte();
+	}
+
+	// NOTE: _state.curPicture is part of the save state in the original engine. We
+	// reconstruct it instead. This is believed to be safe for at least hires 0-2, but
+	// this may need to be re-evaluated for later games.
+	_state.curPicture = getCurRoom().curPicture;
+
+	size = stream.readUint32BE();
+	if (size != _state.items.size())
+		error("Item count mismatch (expected %i; found %i)", _state.items.size(), size);
+
+	Common::List<Item>::iterator item;
+	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
+		item->room = stream.readByte();
+		item->picture = stream.readByte();
+		item->position.x = stream.readByte();
+		item->position.y = stream.readByte();
+		item->state = stream.readByte();
+	}
+
+	size = stream.readUint32BE();
+	if (size != _state.vars.size())
+		error("Variable count mismatch (expected %i; found %i)", _state.vars.size(), size);
+
+	for (uint i = 0; i < size; ++i)
+		_state.vars[i] = stream.readByte();
+}
+
 Common::Error AdlEngine::loadGameState(int slot) {
 	Common::String fileName = Common::String::format("%s.s%02d", _targetName.c_str(), slot);
 	Common::InSaveFile *inFile = getSaveFileManager()->openForLoading(fileName);
@@ -708,47 +751,7 @@ Common::Error AdlEngine::loadGameState(int slot) {
 	Graphics::skipThumbnail(*inFile);
 
 	initState();
-
-	_state.room = inFile->readByte();
-	_state.moves = inFile->readByte();
-	_state.isDark = inFile->readByte();
-	_state.time.hours = inFile->readByte();
-	_state.time.minutes = inFile->readByte();
-
-	uint32 size = inFile->readUint32BE();
-	if (size != _state.rooms.size())
-		error("Room count mismatch (expected %i; found %i)", _state.rooms.size(), size);
-
-	for (uint i = 0; i < size; ++i) {
-		_state.rooms[i].picture = inFile->readByte();
-		_state.rooms[i].curPicture = inFile->readByte();
-		_state.rooms[i].isFirstTime = inFile->readByte();
-	}
-
-	// NOTE: _state.curPicture is part of the save state in the original engine. We
-	// reconstruct it instead. This is believed to be safe for at least hires 0-2, but
-	// this may need to be re-evaluated for later games.
-	_state.curPicture = getCurRoom().curPicture;
-
-	size = inFile->readUint32BE();
-	if (size != _state.items.size())
-		error("Item count mismatch (expected %i; found %i)", _state.items.size(), size);
-
-	Common::List<Item>::iterator item;
-	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
-		item->room = inFile->readByte();
-		item->picture = inFile->readByte();
-		item->position.x = inFile->readByte();
-		item->position.y = inFile->readByte();
-		item->state = inFile->readByte();
-	}
-
-	size = inFile->readUint32BE();
-	if (size != _state.vars.size())
-		error("Variable count mismatch (expected %i; found %i)", _state.vars.size(), size);
-
-	for (uint i = 0; i < size; ++i)
-		_state.vars[i] = inFile->readByte();
+	loadState(*inFile);
 
 	if (inFile->err() || inFile->eos())
 		error("Failed to load game '%s'", fileName.c_str());
@@ -765,6 +768,35 @@ bool AdlEngine::canLoadGameStateCurrently() {
 	return _canRestoreNow;
 }
 
+void AdlEngine::saveState(Common::WriteStream &stream) {
+	stream.writeByte(_state.room);
+	stream.writeByte(_state.moves);
+	stream.writeByte(_state.isDark);
+	stream.writeByte(_state.time.hours);
+	stream.writeByte(_state.time.minutes);
+
+	stream.writeUint32BE(_state.rooms.size());
+	for (uint i = 0; i < _state.rooms.size(); ++i) {
+		stream.writeByte(_state.rooms[i].picture);
+		stream.writeByte(_state.rooms[i].curPicture);
+		stream.writeByte(_state.rooms[i].isFirstTime);
+	}
+
+	stream.writeUint32BE(_state.items.size());
+	Common::List<Item>::const_iterator item;
+	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
+		stream.writeByte(item->room);
+		stream.writeByte(item->picture);
+		stream.writeByte(item->position.x);
+		stream.writeByte(item->position.y);
+		stream.writeByte(item->state);
+	}
+
+	stream.writeUint32BE(_state.vars.size());
+	for (uint i = 0; i < _state.vars.size(); ++i)
+		stream.writeByte(_state.vars[i]);
+}
+
 Common::Error AdlEngine::saveGameState(int slot, const Common::String &desc) {
 	Common::String fileName = Common::String::format("%s.s%02d", _targetName.c_str(), slot);
 	Common::OutSaveFile *outFile = getSaveFileManager()->openForSaving(fileName);
@@ -802,34 +834,7 @@ Common::Error AdlEngine::saveGameState(int slot, const Common::String &desc) {
 	outFile->writeUint32BE(playTime);
 
 	_display->saveThumbnail(*outFile);
-
-	outFile->writeByte(_state.room);
-	outFile->writeByte(_state.moves);
-	outFile->writeByte(_state.isDark);
-	outFile->writeByte(_state.time.hours);
-	outFile->writeByte(_state.time.minutes);
-
-	outFile->writeUint32BE(_state.rooms.size());
-	for (uint i = 0; i < _state.rooms.size(); ++i) {
-		outFile->writeByte(_state.rooms[i].picture);
-		outFile->writeByte(_state.rooms[i].curPicture);
-		outFile->writeByte(_state.rooms[i].isFirstTime);
-	}
-
-	outFile->writeUint32BE(_state.items.size());
-	Common::List<Item>::const_iterator item;
-	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
-		outFile->writeByte(item->room);
-		outFile->writeByte(item->picture);
-		outFile->writeByte(item->position.x);
-		outFile->writeByte(item->position.y);
-		outFile->writeByte(item->state);
-	}
-
-	outFile->writeUint32BE(_state.vars.size());
-	for (uint i = 0; i < _state.vars.size(); ++i)
-		outFile->writeByte(_state.vars[i]);
-
+	saveState(*outFile);
 	outFile->finalize();
 
 	if (outFile->err()) {
diff --git a/engines/adl/adl.h b/engines/adl/adl.h
index dcc8f44a20..4b644ccbf4 100644
--- a/engines/adl/adl.h
+++ b/engines/adl/adl.h
@@ -42,6 +42,7 @@
 
 namespace Common {
 class ReadStream;
+class WriteStream;
 class SeekableReadStream;
 class File;
 struct Event;
@@ -235,6 +236,8 @@ protected:
 	Common::Error loadGameState(int slot);
 	Common::Error saveGameState(int slot, const Common::String &desc);
 
+	virtual void loadState(Common::ReadStream &stream);
+	virtual void saveState(Common::WriteStream &stream);
 	Common::String readString(Common::ReadStream &stream, byte until = 0) const;
 	Common::String readStringAt(Common::SeekableReadStream &stream, uint offset, byte until = 0) const;
 	void openFile(Common::File &file, const Common::String &name) const;
diff --git a/engines/adl/adl_v4.cpp b/engines/adl/adl_v4.cpp
index 613ffd8832..2ab784f3aa 100644
--- a/engines/adl/adl_v4.cpp
+++ b/engines/adl/adl_v4.cpp
@@ -36,6 +36,98 @@ AdlEngine_v4::~AdlEngine_v4() {
 	delete _itemPicIndex;
 }
 
+void AdlEngine_v4::loadState(Common::ReadStream &stream) {
+	_state.room = stream.readByte();
+	_state.region = stream.readByte();
+	_state.prevRegion = stream.readByte();
+
+	uint32 size = stream.readUint32BE();
+	if (size != _state.regions.size())
+		error("Region count mismatch (expected %i; found %i)", _state.regions.size(), size);
+
+	Common::Array<Region>::iterator region;
+	for (region = _state.regions.begin(); region != _state.regions.end(); ++region) {
+		size = stream.readUint32BE();
+		if (size != region->rooms.size())
+			error("Room count mismatch (expected %i; found %i)", region->rooms.size(), size);
+
+		Common::Array<RoomState>::iterator room;
+		for (room = region->rooms.begin(); room != region->rooms.end(); ++room) {
+			room->picture = stream.readByte();
+			room->isFirstTime = stream.readByte();
+		}
+
+		size = stream.readUint32BE();
+		if (size != region->vars.size())
+			error("Variable count mismatch (expected %i; found %i)", region->vars.size(), size);
+
+		for (uint i = 0; i < region->vars.size(); ++i)
+			region->vars[i] = stream.readByte();
+	}
+
+	size = stream.readUint32BE();
+	if (size != _state.items.size())
+		error("Item count mismatch (expected %i; found %i)", _state.items.size(), size);
+
+	Common::List<Item>::iterator item;
+	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
+		item->room = stream.readByte();
+		item->region = stream.readByte();
+		item->state = stream.readByte();
+	}
+
+	size = stream.readUint32BE();
+	const uint expectedSize = _state.vars.size() - getRegion(1).vars.size();
+	if (size != expectedSize)
+		error("Variable count mismatch (expected %i; found %i)", expectedSize, size);
+
+	for (uint i = getRegion(1).vars.size(); i < size; ++i)
+		_state.vars[i] = stream.readByte();
+
+	if (stream.err() || stream.eos())
+		return;
+
+	loadRegion(_state.region);
+	restoreRoomState(_state.room);
+	_roomOnScreen = _picOnScreen = 0;
+}
+
+void AdlEngine_v4::saveState(Common::WriteStream &stream) {
+	backupVars();
+	backupRoomState(_state.room);
+
+	stream.writeByte(_state.room);
+	stream.writeByte(_state.region);
+	stream.writeByte(_state.prevRegion);
+
+	stream.writeUint32BE(_state.regions.size());
+	Common::Array<Region>::const_iterator region;
+	for (region = _state.regions.begin(); region != _state.regions.end(); ++region) {
+		stream.writeUint32BE(region->rooms.size());
+		Common::Array<RoomState>::const_iterator room;
+		for (room = region->rooms.begin(); room != region->rooms.end(); ++room) {
+			stream.writeByte(room->picture);
+			stream.writeByte(room->isFirstTime);
+		}
+
+		stream.writeUint32BE(region->vars.size());
+		for (uint i = 0; i < region->vars.size(); ++i)
+			stream.writeByte(region->vars[i]);
+	}
+
+	stream.writeUint32BE(_state.items.size());
+	Common::List<Item>::const_iterator item;
+	for (item = _state.items.begin(); item != _state.items.end(); ++item) {
+		stream.writeByte(item->room);
+		stream.writeByte(item->region);
+		stream.writeByte(item->state);
+	}
+
+	stream.writeUint32BE(_state.vars.size() - getRegion(1).vars.size());
+	for (uint i = getRegion(1).vars.size(); i < _state.vars.size(); ++i)
+		stream.writeByte(_state.vars[i]);
+}
+
 Common::String AdlEngine_v4::loadMessage(uint idx) const {
 	Common::String str = AdlEngine_v3::loadMessage(idx);
 
diff --git a/engines/adl/adl_v4.h b/engines/adl/adl_v4.h
index 1fd0a72b1d..c1f9bfbd73 100644
--- a/engines/adl/adl_v4.h
+++ b/engines/adl/adl_v4.h
@@ -49,6 +49,8 @@ protected:
 	AdlEngine_v4(OSystem *syst, const AdlGameDescription *gd);
 
 	// AdlEngine
+	virtual void loadState(Common::ReadStream &stream);
+	virtual void saveState(Common::WriteStream &stream);
 	virtual Common::String loadMessage(uint idx) const;
 	virtual Common::String getItemDescription(const Item &item) const;
 	virtual void switchRegion(byte region);