* Implemented the following GPL functions: IsIcoOn, IcoStat, IsObjOn, IsObjOff, IsObjAway

* Changed GameObject::_location to an int since we sometimes use location -1.
* Some more uint <-> int changes to prevent comparisons between signed and unsigned.

svn-id: r42452

4 files changed, 61 insertions, 9 deletions

diff --git a/engines/draci/game.cpp b/engines/draci/game.cpp
index 4d6c77a169..e7f1b2d454 100644
--- a/engines/draci/game.cpp
+++ b/engines/draci/game.cpp
@@ -144,7 +144,7 @@ void Game::init() {
 	changeRoom(0);
 }
 
-void Game::loadRoom(uint roomNum) {
+void Game::loadRoom(int roomNum) {
 
 	BAFile *f;
 	f = _vm->_roomsArchive->getFile(roomNum * 4);
@@ -208,7 +208,7 @@ int Game::loadAnimation(uint animNum, uint z) {
 	BAFile *animFile = _vm->_animationsArchive->getFile(animNum);
 	Common::MemoryReadStream animationReader(animFile->_data, animFile->_length);	
 
-	int numFrames = animationReader.readByte();
+	uint numFrames = animationReader.readByte();
 
 	// FIXME: handle these properly
 	animationReader.readByte(); // Memory logic field, not used
@@ -356,6 +356,10 @@ void Game::setVariable(int numVar, int value) {
 	_variables[numVar] = value;
 }
 
+int Game::getIconStatus(int iconID) {
+	return _iconStatus[iconID];
+}
+
 Game::~Game() {
 	delete[] _persons;
 	delete[] _variables;
diff --git a/engines/draci/game.h b/engines/draci/game.h
index da12771fc7..c9f913dbc8 100644
--- a/engines/draci/game.h
+++ b/engines/draci/game.h
@@ -58,7 +58,7 @@ struct GameObject {
 	Common::Array<int> _anims;
 	GPL2Program _program;
 	byte *_title;
-	byte _location;
+	int _location;
 	bool _visible;
 };
 
@@ -132,7 +132,7 @@ public:
 		_currentRoom._roomNum = n;
 	}
 
-	void loadRoom(uint roomNum);
+	void loadRoom(int roomNum);
 	int loadAnimation(uint animNum, uint z);
 	void loadOverlays();
 	void loadObject(uint numObj);
@@ -142,6 +142,8 @@ public:
 	int getVariable(int varNum);
 	void setVariable(int varNum, int value);	
 
+	int getIconStatus(int iconID);
+
 private:
 	DraciEngine *_vm;
 	int *_variables;
diff --git a/engines/draci/script.cpp b/engines/draci/script.cpp
index e9d35226ba..e2c902cf6f 100644
--- a/engines/draci/script.cpp
+++ b/engines/draci/script.cpp
@@ -118,13 +118,13 @@ void Script::setupCommandList() {
 	static const GPL2Function gplFunctions[] = {
 		{ "Not", 		&Script::funcNot },
 		{ "Random", 	&Script::funcRandom },
-		{ "IsIcoOn", 	NULL },
+		{ "IsIcoOn", 	&Script::funcIsIcoOn },
 		{ "IsIcoAct", 	NULL },
-		{ "IcoStat", 	NULL },
+		{ "IcoStat", 	&Script::funcIcoStat },
 		{ "ActIco", 	NULL },
-		{ "IsObjOn", 	NULL },
-		{ "IsObjOff", 	NULL },
-		{ "IsObjAway", 	NULL },
+		{ "IsObjOn", 	&Script::funcIsObjOn },
+		{ "IsObjOff", 	&Script::funcIsObjOff },
+		{ "IsObjAway", 	&Script::funcIsObjAway },
 		{ "ObjStat", 	NULL },
 		{ "LastBlock", 	NULL },
 		{ "AtBegin", 	NULL },
@@ -222,6 +222,46 @@ int Script::funcNot(int n) {
 	return !n;
 }
 
+int Script::funcIsIcoOn(int iconID) {
+	iconID -= 1;
+
+	return _vm->_game->getIconStatus(iconID) == 1;
+} 
+
+int Script::funcIcoStat(int iconID) {
+	iconID -= 1;
+
+	int status = _vm->_game->getIconStatus(iconID);
+	return (status == 1) ? 1 : 2;
+}
+
+int Script::funcIsObjOn(int objID) {
+	objID -= 1;
+
+	GameObject *obj = _vm->_game->getObject(objID);
+
+	return obj->_visible;
+}
+
+int Script::funcIsObjOff(int objID) {
+	objID -= 1;
+
+	GameObject *obj = _vm->_game->getObject(objID);
+
+	// We index locations from 0 (as opposed to the original player where it was from 1)
+	// That's why the "invalid" location 0 from the data files is converted to -1
+	return !obj->_visible && obj->_location != -1;
+}
+
+int Script::funcIsObjAway(int objID) {
+	objID -= 1;
+
+	GameObject *obj = _vm->_game->getObject(objID);
+
+	// see Script::funcIsObjOff
+	return !obj->_visible && obj->_location == -1;
+}
+
 /* GPL commands */
 
 void Script::load(Common::Queue<int> &params) {
diff --git a/engines/draci/script.h b/engines/draci/script.h
index 7007e563c4..d8e9a2f49f 100644
--- a/engines/draci/script.h
+++ b/engines/draci/script.h
@@ -122,6 +122,12 @@ private:
 
 	int funcRandom(int n);
 	int funcNot(int n);
+	int funcIsIcoOn(int iconID);
+	int funcIcoStat(int iconID);
+	int funcIsObjOn(int objID);
+	int funcIsObjOff(int objID);
+	int funcIsObjAway(int objID);
+
 
 	void setupCommandList();
 	const GPL2Command *findCommand(byte num, byte subnum);