Expression DecodeParseString(Expression exp)
{
while ((_opCode = ReadByte()) != 0xFF)
{
switch (_opCode & 0xF)
{
case 0: // SO_AT
var x = GetVarOrDirectWord(OpCodeParameter.Param1);
var y = GetVarOrDirectWord(OpCodeParameter.Param2);
exp = new MethodInvocation(new MemberAccess(exp, "At")).AddArguments(x, y);
break;
case 1: // SO_COLOR
var color = GetVarOrDirectByte(OpCodeParameter.Param1);
exp = new MethodInvocation(new MemberAccess(exp, "Color")).AddArguments(color);
break;
case 2: // SO_CLIPPED
var clipped = GetVarOrDirectWord(OpCodeParameter.Param1);
exp = new MethodInvocation(new MemberAccess(exp, "Clipped")).AddArguments(clipped);
break;
case 4: // SO_CENTER
exp = new MethodInvocation(new MemberAccess(exp, "Center"));
break;
case 6: // SO_LEFT
var args = new List<Expression>();
if (Game.Version == 3)
{
args.Add(GetVarOrDirectWord(OpCodeParameter.Param1));
}
exp = new MethodInvocation(new MemberAccess(exp, "Left")).AddArguments(args);
break;
case 7: // SO_OVERHEAD
exp = new MethodInvocation(new MemberAccess(exp, "Overhead"));
break;
case 8:
{ // SO_SAY_VOICE
var offset = GetVarOrDirectWord(OpCodeParameter.Param1);
var delay = GetVarOrDirectWord(OpCodeParameter.Param2);
exp = new MethodInvocation(new MemberAccess(exp, "PlayCDTrack")).AddArguments(offset, delay);
}
break;
case 15:
{ // SO_TEXTSTRING
var text = ReadCharacters();
exp = new MethodInvocation(new MemberAccess(exp, "Print")).AddArguments(text);
}
return exp;
default:
throw new NotImplementedException(string.Format("DecodeParseString #{0:X2} is not implemented", _opCode & 0xF));
}
}
return exp;
}
protected virtual Expression DecodeParseString(Expression target, bool withActor)
{
var b = ReadByte();
switch (b)
{
case 65: // SO_AT
{
var y = Pop();
var x = Pop();
target = new MethodInvocation(new MemberAccess(target, "At")).AddArguments(x, y);
}
break;
case 66: // SO_COLOR
{
var color = Pop();
target = new MethodInvocation(new MemberAccess(target, "Color")).AddArguments(color);
}
break;
case 67: // SO_CLIPPED
{
var right = Pop();
target = new MethodInvocation(new MemberAccess(target, "Clipped")).AddArguments(right);
}
break;
case 69: // SO_CENTER
target = new MethodInvocation(new MemberAccess(target, "Center"));
break;
case 71: // SO_LEFT
target = new MethodInvocation(new MemberAccess(target, "Left"));
break;
case 72: // SO_OVERHEAD
target = new MethodInvocation(new MemberAccess(target, "OverHead"));
break;
case 74: // SO_MUMBLE
target = new MethodInvocation(new MemberAccess(target, "Mumble"));
break;
case 75: // SO_TEXTSTRING
target = new MethodInvocation(new MemberAccess(target, "Text")).AddArgument(ReadCharacters());
break;
case 0xFE:
target = new MethodInvocation(new MemberAccess(target, "LoadDefault"));
if (withActor)
{
var actor = Pop();
target = new MethodInvocation(new MemberAccess(target, "Actor")).AddArgument(actor);
}
break;
case 0xFF:
target = new MethodInvocation(new MemberAccess(target, "SaveDefault"));
break;
default:
throw new NotSupportedException(string.Format("DecodeParseString: default case 0x{0:X}", b));
}
return target;
}
protected Expression GetActor(Expression index)
{
return new ElementAccess(Actors, index);
}
protected virtual void PopRoomAndObject(out Expression room, out Expression obj)
{
room = Pop();
obj = Pop();
}
protected override Expression DecodeParseString(Expression target, bool withActor)
{
var b = ReadByte();
switch (b)
{
case 0xC8: // SO_PRINT_BASEOP
target = new MethodInvocation(new MemberAccess(target, "LoadDefault"));
if (withActor)
{
var actor = Pop();
target = new MethodInvocation(new MemberAccess(target, "Actor")).AddArgument(actor);
}
break;
case 0xC9: // SO_PRINT_END
target = new MethodInvocation(new MemberAccess(target, "SaveDefault"));
break;
case 0xCA: // SO_PRINT_AT
{
var y = Pop();
var x = Pop();
target = new MethodInvocation(new MemberAccess(target, "At")).AddArguments(x, y);
}
break;
case 0xCB: // SO_COLOR
{
var color = Pop();
target = new MethodInvocation(new MemberAccess(target, "Color")).AddArguments(color);
}
break;
case 0xCC: // SO_PRINT_CENTER
target = new MethodInvocation(new MemberAccess(target, "Center"));
break;
case 0xCD: // SO_PRINT_CHARSET Set print character set
target = new MethodInvocation(new MemberAccess(target, "Charset")).AddArgument(Pop());
break;
case 0xCE: // SO_PRINT_LEFT
target = new MethodInvocation(new MemberAccess(target, "Left"));
break;
case 0xCF: // SO_OVERHEAD
target = new MethodInvocation(new MemberAccess(target, "OverHead"));
break;
case 0xD0: // SO_MUMBLE
target = new MethodInvocation(new MemberAccess(target, "Mumble"));
break;
case 0xD1: // SO_TEXTSTRING
target = new MethodInvocation(new MemberAccess(target, "Text")).AddArgument(ReadCharacters());
break;
case 0xD2: // SO_PRINT_WRAP Set print wordwrap
target = new MethodInvocation(new MemberAccess(target, "WordWrap"));
break;
default:
throw new NotSupportedException(string.Format("DecodeParseString: default case 0x{0:X}", b));
}
return target;
}
Expression SetResult(int index, Expression value)
{
return new BinaryExpression(
GetVariableAt(index), Operator.Assignment, value);
}
Expression GetIndex(Expression exp, int index)
{
return new ElementAccess(exp, index);
}
protected Expression SetResultExpression(Expression index, Expression value)
{
var literalExp = index as IntegerLiteralExpression;
if (literalExp != null)
{
return SetResult(literalExp.Value, value);
}
else
{
return new BinaryExpression(new ElementAccess("Variables", index), Operator.Assignment, value);
}
}
Expression ReadVariable(Expression index)
{
var literal = index as IntegerLiteralExpression;
if (literal != null)
{
return ReadVariable(literal.Value);
}
else
{
return ReadVariable2(index);
}
}
static Expression Not(Expression condition)
{
if (condition is UnaryExpression)
{
return ((UnaryExpression)condition).Not();
}
else if (condition is BinaryExpression)
{
return ((BinaryExpression)condition).Not();
}
else
{
return new UnaryExpression(condition, Operator.Not);
}
}
protected Expression SetResult(int index, Expression value)
{
return new BinaryExpression(GetResultIndex(index), Operator.Assignment, value);
}
Statement JumpRelative(Expression condition)
{
var offset = (short)ReadWord();
var binExp = condition as BinaryExpression;
if (binExp != null)
{
condition = binExp.Not();
}
else
{
condition = true.ToLiteral();
}
return new JumpStatement(condition, (int)_br.BaseStream.Position + offset);
}
static Expression GetActorAt(Expression index)
{
var ile = index as IntegerLiteralExpression;
if (ile != null)
{
var id = ile.Value & 0x7F;
if (id > 0 && id <= v0ActorNames_English.Length)
{
return new SimpleName(v0ActorNames_English[id - 1]);
}
}
return new ElementAccess("Actors", index);
}
static ElementAccess GetObjectAt(Expression index)
{
return new ElementAccess("Objects", index);
}
Expression WriteVar(int index, Expression value)
{
return new BinaryExpression(new ElementAccess(VariablesName, index), Operator.Assignment, value);
}
Expression Verb(Expression index)
{
return new ElementAccess(Verbs, index);
}
protected Expression ReadVariable2(Expression var)
{
return new MethodInvocation("ReadVariable").AddArgument(var);
}
Statement JumpRelative(Expression condition)
{
var offset = (short)FetchScriptWord();
var binExp = condition as BinaryExpression;
var unExp = condition as UnaryExpression;
if (binExp != null)
{
condition = binExp.Not();
}
else if (unExp != null)
{
condition = unExp.Not();
}
else
{
condition = condition.Not();
}
return new JumpStatement(condition, (int)_br.BaseStream.Position + offset);
}