public ObjectExpression evalSimpleExpression(SimpleExpression exp)
{
if (exp is LiteralExpression)
{
lit = (LiteralExpression)exp;
switch (lit.value.type)
{
case ParserUtils.Token.TokenValue.STRING:
return(new ObjectExpression(ObjectType.stringType, lit.value.stringValue));
case ParserUtils.Token.TokenValue.INT:
return(new ObjectExpression(ObjectType.intType, lit.value.intValue));
case ParserUtils.Token.TokenValue.CHAR:
return(new ObjectExpression(ObjectType.charType, lit.value.charValue));
case ParserUtils.Token.TokenValue.BOOLEAN:
return(new ObjectExpression(ObjectType.booleanType, lit.value.booleanValue));
default:
break;
}
}
else if (exp is SubSimpleExpression)
{
return(evalSimpleExpression(((SubSimpleExpression)exp).exp));
}
else if (exp is NullExpression)
{
return(null);
}
else if (exp is BinaryOperatorExpression)
{
BinaryOperatorExpression binExp = (BinaryOperatorExpression)exp;
ObjectExpression oLeft = evalSimpleExpression(binExp.e1), oRight;
switch (binExp.op)
{
case ParserUtils.Token.TokenValue.AND:
if ((bool)oLeft.value)
{
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (bool)oRight.value));
}
return(new ObjectExpression(ObjectType.booleanType, false));
case ParserUtils.Token.TokenValue.OR:
if ((bool)oLeft.value)
{
return(new ObjectExpression(ObjectType.booleanType, true));
}
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (bool)oRight.value));
case ParserUtils.Token.TokenValue.PLUS:
oRight = evalSimpleExpression(binExp.e2);
if (oLeft.type == ObjectType.stringType || oRight.type == ObjectType.stringType)
{
return(new ObjectExpression(ObjectType.stringType, oLeft.value.ToString() + oRight.value.ToString()));
}
if (oLeft.type == ObjectType.intType && oRight.type == ObjectType.intType)
{
return(new ObjectExpression(ObjectType.intType, (int)oLeft.value + (int)oRight.value));
}
break;
case ParserUtils.Token.TokenValue.MINUS:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.intType, (int)oLeft.value - (int)oRight.value));
case ParserUtils.Token.TokenValue.TIMES:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.intType, (int)oLeft.value * (int)oRight.value));
case ParserUtils.Token.TokenValue.DIV:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.intType, (int)oLeft.value / (int)oRight.value));
case ParserUtils.Token.TokenValue.LT:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (int)oLeft.value < (int)oRight.value));
case ParserUtils.Token.TokenValue.GT:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (int)oLeft.value > (int)oRight.value));
case ParserUtils.Token.TokenValue.LEQ:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (int)oLeft.value <= (int)oRight.value));
case ParserUtils.Token.TokenValue.GEQ:
oRight = evalSimpleExpression(binExp.e2);
return(new ObjectExpression(ObjectType.booleanType, (int)oLeft.value >= (int)oRight.value));
case ParserUtils.Token.TokenValue.EQBOOL:
oRight = evalSimpleExpression(binExp.e2);
if (oLeft.type == ObjectType.intType)
{
return(new ObjectExpression(ObjectType.booleanType, (int)oLeft.value == (int)oRight.value));
}
if (oLeft.type == ObjectType.stringType)
{
return(new ObjectExpression(ObjectType.booleanType, ((string)oLeft.value).Equals((string)oRight.value)));
}
if (oLeft.type == ObjectType.booleanType)
{
return(new ObjectExpression(ObjectType.booleanType, (bool)oLeft.value == (bool)oRight.value));
}
if (oLeft.type == ObjectType.charType)
{
return(new ObjectExpression(ObjectType.booleanType, (char)oLeft.value == (char)oRight.value));
}
break;
default:
break;
}
}
else if (exp is UnaryOperatorExpression)
{
unExp = (UnaryOperatorExpression)exp;
switch (unExp.op)
{
case ParserUtils.Token.TokenValue.NEG:
o1 = evalSimpleExpression(((UnaryOperatorExpression)exp).exp);
return(new ObjectExpression(ObjectType.booleanType, !((bool)o1.value)));
}
}
else if (exp is VariableExpression)
{
return(variables[((VariableExpression)exp).name]);
}
else if (exp is CharacterVariableExpression)
{
return(new ObjectExpression(ObjectType.intType, IrisData.getPlayerVariable(((CharacterVariableExpression)exp).name)));
}
return(null);
}
public void evalInstruction(InstructionExpression instr)
{
if (instr is ValueExpression)
{
valueExp = (ValueExpression)instr;
if (valueExp.type == ObjectType.intType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, 0));
}
else if (valueExp.type == ObjectType.booleanType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, false));
}
else if (valueExp.type == ObjectType.stringType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, ""));
}
if (valueExp.value != null)
{
variables[valueExp.name] = new ObjectExpression(valueExp.type, evalSimpleExpression(valueExp.value).value);
}
return;
}
else if (instr is AssignExpression)
{
assignExp = (AssignExpression)instr;
variables[assignExp.name] = evalSimpleExpression(assignExp.value);
return;
}
else if (instr is OpenMsgDialogInstruction)
{
gScreen.msgBox.openBox();
return;
}
else if (instr is MsgDisplayInstruction)
{
msgExp = (MsgDisplayInstruction)instr;
o1 = evalSimpleExpression(msgExp.msg);
if (o1.type != ObjectType.stringType)
{
return;
}
gScreen.msgBox.setText((string)o1.value);
return;
}
else if (instr is NextMsgDialogInstruction)
{
shouldEvalSeq = false;
gScreen.msgBox.showNextButton();
return;
}
else if (instr is CloseMsgDialogInstruction)
{
shouldEvalSeq = false;
gScreen.msgBox.showCloseButton();
return;
}
else if (instr is SwitchCharacterInstruction)
{
try
{
gScreen.msgBox.switchCharacter(IrisData.characters[((SwitchCharacterInstruction)instr).character.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is RemoveCharacter)
{
gScreen.msgBox.removeCharacter();
return;
}
else if (instr is SetVariableInstruction)
{
setExp = (SetVariableInstruction)instr;
/*if (!playerVariables.ContainsKey(setExp.variable.name))
* {
* playerVariables.Add(setExp.variable.name, -1);
* }
*
* playerVariables[setExp.variable.name] = (int)(evalSimpleExpression(setExp.value).value);*/
IrisData.setPlayerVariable(setExp.variable.name, (int)(evalSimpleExpression(setExp.value).value));
return;
}
else if (instr is InputInstruction)
{
inputExp = (InputInstruction)instr;
o1 = variables[inputExp.name];
shouldEvalSeq = false;
if (o1.type == ObjectType.intType)
{
gScreen.iBox.openBox(InputBox.InputType.INT_INPUT);
lastInstr = inputExp;
}
else if (o1.type == ObjectType.stringType)
{
gScreen.iBox.openBox(InputBox.InputType.STRING_INPUT);
lastInstr = inputExp;
}
return;
}
else if (instr is MenuInstruction)
{
menuExp = (MenuInstruction)instr;
shouldEvalSeq = false;
gScreen.menBox.setChoices(((MenuInstruction)instr).choices);
gScreen.menBox.openMenu();
lastInstr = menuExp;
return;
}
else if (instr is PlayMediaInstruction)
{
playExp = (PlayMediaInstruction)instr;
/*if (!IrisData.sounds.ContainsKey(playExp.name))
* {
* return;
* }*/
//else if(IrisData.
try
{
gScreen.playMedia(IrisData.sounds[playExp.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is StopMediaInstruction)
{
gScreen.stopMedia();
return;
}
else if (instr is ShowImageInstruction)
{
showExp = (ShowImageInstruction)instr;
if (showExp.image is VariableExpression)
{
img = IrisData.images[((VariableExpression)showExp.image).name];
}
else
{
memberExp = (MemberAccessExpression)showExp.image;
charac = IrisData.characters[memberExp.name];
img = charac.getImage(memberExp.field);
}
gScreen.showImage(img, showExp.position);
return;
}
else if (instr is SetBackgroundInstruction)
{
bgdInstr = (SetBackgroundInstruction)instr;
try
{
gScreen.setBackground(IrisData.backgrounds[bgdInstr.image.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is CleanBackgroundInstruction)
{
gScreen.clearBackground();
return;
}
else if (instr is CleanForegroundInstruction)
{
gScreen.clearForeGround();
return;
}
else if (instr is GotoInstruction)
{
gotoExp = (GotoInstruction)instr;
npcExp = gotoExp.npc;
evalExpression(IrisData.npcs[npcExp.npc].labels[npcExp.label]);
return;
}
}
