MUTATIONOFJB: Start implementation of ATN scripts (IF command).

15 files changed, 588 insertions, 14 deletions

diff --git a/engines/mutationofjb/commands/command.cpp b/engines/mutationofjb/commands/command.cpp
new file mode 100644
index 0000000000..d0b3f826e3
--- /dev/null
+++ b/engines/mutationofjb/commands/command.cpp
@@ -0,0 +1,33 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "mutationofjb/commands/command.h"
+#include "common/scummsys.h"
+
+namespace MutationOfJB {
+Command::~Command() {}
+
+SeqCommand *Command::asSeqCommand() {
+	return nullptr;
+}
+
+}
diff --git a/engines/mutationofjb/commands/command.h b/engines/mutationofjb/commands/command.h
new file mode 100644
index 0000000000..beae9d2833
--- /dev/null
+++ b/engines/mutationofjb/commands/command.h
@@ -0,0 +1,58 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef MUTATIONOFJB_COMMAND_H
+#define MUTATIONOFJB_COMMAND_H
+
+namespace Common {
+	class String;
+}
+
+namespace MutationOfJB {
+
+class GameData;
+class SeqCommand;
+class IfCommand;
+class CallMacroCommand;
+class ScriptParseContext;
+class Command;
+
+typedef bool (*CommandParseFunc)(const Common::String &line, ScriptParseContext &parseContext, Command *&command);
+
+class Command {
+public:
+	enum ExecuteResult {
+		None,
+		Finished,
+		InProgress
+	};
+
+	virtual ~Command();
+
+	virtual ExecuteResult execute(GameData &gameData) = 0;
+	virtual Command *next() const = 0;
+
+	virtual SeqCommand *asSeqCommand();
+};
+}
+
+#endif
diff --git a/engines/mutationofjb/commands/conditionalcommand.cpp b/engines/mutationofjb/commands/conditionalcommand.cpp
new file mode 100644
index 0000000000..3118e6d8cb
--- /dev/null
+++ b/engines/mutationofjb/commands/conditionalcommand.cpp
@@ -0,0 +1,41 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "mutationofjb/commands/conditionalcommand.h"
+#include "common/scummsys.h"
+
+namespace MutationOfJB {
+
+ConditionalCommand::ConditionalCommand() :
+	_trueCommand(nullptr),
+	_falseCommand(nullptr),
+	_cachedResult(false)
+{}
+
+Command *ConditionalCommand::next() const {
+	if (_cachedResult) {
+		return _trueCommand;
+	} else {
+		return _falseCommand;
+	}
+}
+};
diff --git a/engines/mutationofjb/commands/conditionalcommand.h b/engines/mutationofjb/commands/conditionalcommand.h
new file mode 100644
index 0000000000..e355662454
--- /dev/null
+++ b/engines/mutationofjb/commands/conditionalcommand.h
@@ -0,0 +1,41 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "mutationofjb/commands/command.h"
+#include "common/scummsys.h"
+
+namespace MutationOfJB {
+
+class ConditionalCommand : public Command {
+public:
+	ConditionalCommand();
+	void setTrueCommand(Command *command);
+	void setFalseCommand(Command *command);
+
+	virtual Command *next() const override;
+protected:
+	Command *_trueCommand;
+	Command *_falseCommand;
+	bool _cachedResult;
+};
+
+}
diff --git a/engines/mutationofjb/commands/ifcommand.cpp b/engines/mutationofjb/commands/ifcommand.cpp
new file mode 100644
index 0000000000..18b8081842
--- /dev/null
+++ b/engines/mutationofjb/commands/ifcommand.cpp
@@ -0,0 +1,88 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "mutationofjb/commands/ifcommand.h"
+#include "mutationofjb/game.h"
+#include "mutationofjb/script.h"
+#include "common/str.h"
+#include "common/translation.h"
+
+namespace MutationOfJB {
+
+bool IfCommand::ParseFunc(const Common::String &line, ScriptParseContext &parseContext, Command *&command)
+{
+	// IFtss oo val!
+	// <t>   1B Tag.
+	// <ss>  2B Scene.
+	// <oo>  2B Object ID.
+	// <val> VL Value.
+	// !     1B Negation (optional).
+
+	if (line.size() < 10) {
+		return false;
+	}
+	
+	if (strncmp(line.c_str(), "IF", 2) != 0) {
+		return false;
+	}
+
+	const char *const cstr = line.c_str();
+	const char tag = cstr[2];
+	const uint8 sceneId = atoi(cstr + 3);
+	const uint8 objectId = atoi(cstr + 6);
+	const uint8 value = atoi(cstr + 9);
+	const bool negative = (line.lastChar() == '!');
+
+	IfCommand *ifCommand = new IfCommand(sceneId, objectId, value, negative);
+
+	command = ifCommand;
+	parseContext.addConditionalCommand(ifCommand, tag);
+	return true;
+}
+
+IfCommand::IfCommand(uint8 sceneId, uint8 objectId, uint16 value, bool negative) :
+	_sceneId(sceneId),
+	_objectId(objectId),
+	_value(value),
+	_negative(negative)
+{}
+
+Command::ExecuteResult IfCommand::execute(GameData &gameData) {
+	Scene* const scene = gameData.getScene(_sceneId);
+	if (!scene) {
+		return Finished;
+	}
+
+	Object* const object = scene->getObject(_objectId);
+	if (!object) {
+		return Finished;
+	}
+
+	_cachedResult = (object->_WX == _value);
+	if (_negative) {
+		_cachedResult = !_cachedResult;
+	}
+
+	return Finished;
+}
+}
+
diff --git a/engines/mutationofjb/commands/ifcommand.h b/engines/mutationofjb/commands/ifcommand.h
new file mode 100644
index 0000000000..d33f34ffb0
--- /dev/null
+++ b/engines/mutationofjb/commands/ifcommand.h
@@ -0,0 +1,52 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef MUTATIONOFJB_IFCOMMAND_H
+#define MUTATIONOFJB_IFCOMMAND_H
+
+#include "mutationofjb/commands/conditionalcommand.h"
+#include "common/scummsys.h"
+
+namespace MutationOfJB {
+
+class ScriptParseContext;
+
+class IfCommand : public ConditionalCommand {
+public:
+	static bool ParseFunc(const Common::String &line, ScriptParseContext &parseContext, Command *&command);
+
+	IfCommand(uint8 sceneId, uint8 objectId, uint16 value, bool negative);
+	
+	virtual ExecuteResult execute(GameData &gameData) override;
+
+private:
+	uint8 _sceneId;
+	uint8 _objectId;
+	uint16 _value;
+	bool _negative;
+
+	bool _cachedResult;
+};
+
+}
+
+#endif
diff --git a/engines/mutationofjb/commands/seqcommand.cpp b/engines/mutationofjb/commands/seqcommand.cpp
new file mode 100644
index 0000000000..ab98497f21
--- /dev/null
+++ b/engines/mutationofjb/commands/seqcommand.cpp
@@ -0,0 +1,40 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "seqcommand.h"
+
+namespace MutationOfJB {
+
+void SeqCommand::setNextCommand(Command *nextCommand)
+{
+	_nextCommand = nextCommand;
+}
+
+Command *SeqCommand::next() const {
+	return _nextCommand;
+}
+
+SeqCommand *SeqCommand::asSeqCommand() {
+	return this;
+}
+
+}
diff --git a/engines/mutationofjb/commands/seqcommand.h b/engines/mutationofjb/commands/seqcommand.h
new file mode 100644
index 0000000000..b247fb22e1
--- /dev/null
+++ b/engines/mutationofjb/commands/seqcommand.h
@@ -0,0 +1,44 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef MUTATIONOFJB_SEQCOMMAND_H
+#define MUTATIONOFJB_SEQCOMMAND_H 
+
+#include "mutationofjb/commands/command.h"
+#include "common/scummsys.h"
+
+namespace MutationOfJB {
+
+class SeqCommand : public Command {
+public:
+	void setNextCommand(Command *nextCommand);
+	virtual Command *next() const override;
+	virtual SeqCommand *asSeqCommand();
+
+private:
+	Command *_nextCommand;
+};
+
+}
+
+#endif
+
diff --git a/engines/mutationofjb/game.cpp b/engines/mutationofjb/game.cpp
index 581077acd6..740fb1cab6 100644
--- a/engines/mutationofjb/game.cpp
+++ b/engines/mutationofjb/game.cpp
@@ -23,6 +23,7 @@
 #include "mutationofjb/game.h"
 #include "common/stream.h"
 #include "common/util.h"
+#include "common/translation.h"
 
 namespace MutationOfJB {
 
@@ -101,7 +102,7 @@ bool Bitmap::loadFromStream(Common::ReadStream &stream) {
 	return true;
 }
 
-bool SceneInfo::loadFromStream(Common::ReadStream &stream) {
+bool Scene::loadFromStream(Common::ReadStream &stream) {
 	int i;
 
 	_startup = stream.readByte();
@@ -111,16 +112,19 @@ bool SceneInfo::loadFromStream(Common::ReadStream &stream) {
 	_DL = stream.readByte();
 
 	_noDoors = stream.readByte();
+	_noDoors = MIN(_noDoors, (uint8) ARRAYSIZE(_doors));
 	for (i = 0; i < ARRAYSIZE(_doors); ++i) {
 		_doors[i].loadFromStream(stream);
 	}
 
 	_noObjects = stream.readByte();
+	_noObjects = MIN(_noObjects, (uint8) ARRAYSIZE(_objects));
 	for (i = 0; i < ARRAYSIZE(_objects); ++i) {
 		_objects[i].loadFromStream(stream);
 	}
 
 	_noStatics = stream.readByte();
+	_noStatics = MIN(_noStatics, (uint8) ARRAYSIZE(_statics));
 	for (i = 0; i < ARRAYSIZE(_statics); ++i) {
 		_statics[i].loadFromStream(stream);
 	}
@@ -139,8 +143,27 @@ bool SceneInfo::loadFromStream(Common::ReadStream &stream) {
 	return true;
 }
 
+Object *Scene::getObject(uint8 objectId) {
+	if (objectId == 0 || objectId > _noObjects) {
+		warning(_("Object %d does not exist"), objectId);
+		return nullptr;
+	}
+
+	return &_objects[objectId - 1];
+}
+
 GameData::GameData() : _currentScene(0) {}
 
+Scene *GameData::getScene(uint8 sceneId)
+{
+	if (sceneId == 0 || sceneId > ARRAYSIZE(_scenes)) {
+		warning(_("Scene %d does not exist"), sceneId);
+		return nullptr;
+	}
+
+	return &_scenes[sceneId - 1];
+}
+
 bool GameData::loadFromStream(Common::ReadStream &stream) {
 	for (int i = 0; i < ARRAYSIZE(_scenes); ++i) {
 		_scenes[i].loadFromStream(stream);
diff --git a/engines/mutationofjb/game.h b/engines/mutationofjb/game.h
index d8f2079e3a..d49a966001 100644
--- a/engines/mutationofjb/game.h
+++ b/engines/mutationofjb/game.h
@@ -22,13 +22,11 @@
 
 #include "common/scummsys.h"
 
-namespace Common
-{
+namespace Common {
 	class ReadStream;
 }
 
-namespace MutationOfJB
-{
+namespace MutationOfJB {
 
 static const uint8 MAX_STR_LENGTH = 0x14;
 
@@ -93,7 +91,10 @@ struct Bitmap {
 };
 
 
-struct SceneInfo {
+struct Scene {
+
+	Object *getObject(uint8 objectId);
+
 	uint8 _startup;
 	uint8 _unknown001;
 	uint8 _unknown002;
@@ -123,12 +124,16 @@ struct SceneInfo {
 
 struct GameData
 {
+public:
 	GameData();
+	Scene *getScene(uint8 sceneId);
+
+	bool loadFromStream(Common::ReadStream &stream);
 
-	SceneInfo _scenes[45];
 	uint8 _currentScene;
+private:
+	Scene _scenes[45];
 
-	bool loadFromStream(Common::ReadStream &stream);
 };
 
 }
diff --git a/engines/mutationofjb/module.mk b/engines/mutationofjb/module.mk
index 7baea826c1..e6c539a2c8 100644
--- a/engines/mutationofjb/module.mk
+++ b/engines/mutationofjb/module.mk
@@ -1,11 +1,16 @@
 MODULE := engines/mutationofjb
 
 MODULE_OBJS := \
+	commands/command.o \
+	commands/conditionalcommand.o \
+	commands/ifcommand.o \
+	commands/seqcommand.o \
 	detection.o \
 	encryptedfile.o \
 	game.o \
 	mutationofjb.o \
 	room.o \
+	script.o \
 	util.o
 
 # This module can be built as a plugin
diff --git a/engines/mutationofjb/mutationofjb.cpp b/engines/mutationofjb/mutationofjb.cpp
index dc7f51869c..cdefbb9833 100644
--- a/engines/mutationofjb/mutationofjb.cpp
+++ b/engines/mutationofjb/mutationofjb.cpp
@@ -102,12 +102,14 @@ Common::Error MutationOfJBEngine::run() {
 			switch (event.type) {
 			case Common::EVENT_LBUTTONDOWN:
 			{
-				const SceneInfo &sceneInfo = _gameData->_scenes[_gameData->_currentScene - 1];
-				for (int i = 0; i < MIN(ARRAYSIZE(sceneInfo._doors), (int) sceneInfo._noDoors); ++i) {
-					const Door &door = sceneInfo._doors[i];
-					if ((event.mouse.x >= door._x) && (event.mouse.x < door._x + door._width) && (event.mouse.y >= door._y) && (event.mouse.y < door._y + door._height)) {
-						_gameData->_currentScene = door._destSceneId;
-						_room->load(_gameData->_currentScene, false);
+				const Scene* const scene = _gameData->getScene(_gameData->_currentScene);
+				if (scene) {
+					for (int i = 0; i < MIN(ARRAYSIZE(scene->_doors), (int) scene->_noDoors); ++i) {
+						const Door &door = scene->_doors[i];
+						if ((event.mouse.x >= door._x) && (event.mouse.x < door._x + door._width) && (event.mouse.y >= door._y) && (event.mouse.y < door._y + door._height)) {
+							_gameData->_currentScene = door._destSceneId;
+							_room->load(_gameData->_currentScene, false);
+						}
 					}
 				}
 				break;
diff --git a/engines/mutationofjb/room.cpp b/engines/mutationofjb/room.cpp
index 95a1a49d7c..eae430a1d5 100644
--- a/engines/mutationofjb/room.cpp
+++ b/engines/mutationofjb/room.cpp
@@ -132,6 +132,9 @@ void Room::loadBackground(EncryptedFile &file, uint32 size) {
 		}
 		lines++;
 	}
+	if (readBytes < size) {
+		file.seek(size - readBytes, SEEK_CUR);
+	}
 
 	_screen->update();
 }
diff --git a/engines/mutationofjb/script.cpp b/engines/mutationofjb/script.cpp
new file mode 100644
index 0000000000..0280c86198
--- /dev/null
+++ b/engines/mutationofjb/script.cpp
@@ -0,0 +1,75 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "script.h"
+
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+#include "common/stream.h"
+#include "mutationofjb/commands/command.h"
+
+namespace MutationOfJB {
+
+static CommandParseFunc* getParseFuncs() {
+	static CommandParseFunc funcs[] = {
+		nullptr
+	};
+
+	return funcs;
+}
+
+
+ScriptParseContext::ScriptParseContext(Common::SeekableReadStream &stream) : _stream(stream) {}
+
+bool ScriptParseContext::readLine(Common::String &line) {
+	do {
+		Common::String str = _stream.readLine();
+		if (str.empty() || str[0] != '.') {
+			line = str;
+			if (line[0] == '*') {
+				line.deleteChar(0);
+			}
+			return true;
+		}
+	} while(_stream.eos());
+
+	return false;
+}
+
+void ScriptParseContext::addConditionalCommand(ConditionalCommand *command, char tag) {
+	ConditionalCommandInfo cmi = {command, tag};
+	_pendingCondCommands.push_back(cmi);
+}
+
+bool Script::loadFromStream(Common::SeekableReadStream &stream) {
+
+	CommandParseFunc * const parseFuncs = getParseFuncs();
+
+	ScriptParseContext parseCtx(stream);
+
+	Common::HashMap<Common::String, Command *> macros;
+	Common::HashMap<Common::String, Command *> labels;
+
+	return true;
+}
+
+}
diff --git a/engines/mutationofjb/script.h b/engines/mutationofjb/script.h
new file mode 100644
index 0000000000..9c0f0f3b1c
--- /dev/null
+++ b/engines/mutationofjb/script.h
@@ -0,0 +1,64 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef MUTATIONOFJB_SCRIPT_H
+#define MUTATIONOFJB_SCRIPT_H 
+
+#include "common/array.h"
+
+namespace Common {
+	class SeekableReadStream;
+	class String;
+}
+
+namespace MutationOfJB {
+
+class ConditionalCommand;
+
+class ScriptParseContext
+{
+public:
+	ScriptParseContext(Common::SeekableReadStream &stream);
+	bool readLine(Common::String &line);
+	void addConditionalCommand(ConditionalCommand *command, char tag);
+	//void setLastIfCommand(IfCommand *command);
+
+private:
+	Common::SeekableReadStream &_stream;
+
+	struct ConditionalCommandInfo {
+		ConditionalCommand *command;
+		char tag;
+	};
+	Common::Array<ConditionalCommandInfo> _pendingCondCommands;
+};
+
+class Script {
+public:
+	bool loadFromStream(Common::SeekableReadStream &stream);
+private:
+
+};
+
+}
+
+#endif