/// <summary></summary>
public ScriptOperand(BinaryReader reader, ScriptArgument expected)
{
ScriptOperandType value = (ScriptOperandType)reader.ReadByte();
// Expectations can transform the result due to overlapping in coding, so deal with them here.
switch (expected)
{
case ScriptArgument.Literal: // Single code byte, any value
Type = ScriptOperandType.Value;
CoreIntegerValue = (byte)value;
return;
case ScriptArgument.Opcode: // Single byte, any value
if (value == ScriptOperandType.Value || value == ScriptOperandType.Variable || value == ScriptOperandType.UnknownVariable)
{
Type = ScriptOperandType.Opcode;
CoreIntegerValue = (byte)value;
return;
}
break;
case ScriptArgument.Address: // 0x01
if (value == ScriptOperandType.Variable)
{
Type = ScriptOperandType.Address;
CoreIntegerValue = reader.ReadUInt16();
return;
}
break;
case ScriptArgument.Comparison: // Single code byte
Type = ScriptOperandType.Comparison;
CoreIntegerValue = (byte)value;
return;
default:
break;
}
// Now we can freely handle the data.
switch (value)
{
case ScriptOperandType.Value: // 0x00
Type = ScriptOperandType.Value;
CoreIntegerValue = reader.ReadByte();
break;
case ScriptOperandType.Variable: // 0x01
Type = ScriptOperandType.Variable;
CoreIntegerValue = reader.ReadUInt16();
break;
case ScriptOperandType.UnknownVariable: // 0x03
Type = ScriptOperandType.UnknownVariable;
CoreIntegerValue = reader.ReadUInt16();
break;
case ScriptOperandType.String: // 0x80
Type = ScriptOperandType.String;
byte stringLength = reader.ReadByte();
long end = reader.BaseStream.Position + stringLength;
CoreStringValue = Engine.ReadCodedString(reader, stringLength + 1);
reader.BaseStream.Position = end;
break;
case ScriptOperandType.StringVariable: // 0x81
Type = ScriptOperandType.StringVariable;
CoreIntegerValue = reader.ReadUInt16();
break;
default: // Anything else
Type = ScriptOperandType.Opcode;
CoreIntegerValue = (byte)value;
break;
}
}
/// <summary></summary>
public ScriptOperand(byte value)
{
Type = ScriptOperandType.Value; CoreIntegerValue = value;
}
/// <summary></summary>
public ScriptOperand(BinaryReader reader, ScriptArgument expected)
{
ScriptOperandType value = (ScriptOperandType)reader.ReadByte();
// Expectations can transform the result due to overlapping in coding, so deal with them here.
switch (expected) {
case ScriptArgument.Literal: // Single code byte, any value
Type = ScriptOperandType.Value;
CoreIntegerValue = (byte)value;
return;
case ScriptArgument.Opcode: // Single byte, any value
if (value == ScriptOperandType.Value || value == ScriptOperandType.Variable || value == ScriptOperandType.UnknownVariable) {
Type = ScriptOperandType.Opcode;
CoreIntegerValue = (byte)value;
return;
}
break;
case ScriptArgument.Address: // 0x01
if (value == ScriptOperandType.Variable) {
Type = ScriptOperandType.Address;
CoreIntegerValue = reader.ReadUInt16();
return;
}
break;
case ScriptArgument.Comparison: // Single code byte
Type = ScriptOperandType.Comparison;
CoreIntegerValue = (byte)value;
return;
default:
break;
}
// Now we can freely handle the data.
switch (value) {
case ScriptOperandType.Value: // 0x00
Type = ScriptOperandType.Value;
CoreIntegerValue = reader.ReadByte();
break;
case ScriptOperandType.Variable: // 0x01
Type = ScriptOperandType.Variable;
CoreIntegerValue = reader.ReadUInt16();
break;
case ScriptOperandType.UnknownVariable: // 0x03
Type = ScriptOperandType.UnknownVariable;
CoreIntegerValue = reader.ReadUInt16();
break;
case ScriptOperandType.String: // 0x80
Type = ScriptOperandType.String;
byte stringLength = reader.ReadByte();
long end = reader.BaseStream.Position + stringLength;
CoreStringValue = Engine.ReadCodedString(reader, stringLength + 1);
reader.BaseStream.Position = end;
break;
case ScriptOperandType.StringVariable: // 0x81
Type = ScriptOperandType.StringVariable;
CoreIntegerValue = reader.ReadUInt16();
break;
default: // Anything else
Type = ScriptOperandType.Opcode;
CoreIntegerValue = (byte)value;
break;
}
}
void RequireType(ScriptOperandType type)
{
if (Type != type) throw new InvalidOperationException("This is not a " + type + " " + typeof(ScriptOperand).Name + "; it is a " + Type + ".");
}
/// <summary></summary>
public ScriptOperand(byte value)
{
Type = ScriptOperandType.Value; CoreIntegerValue = value;
}
