internal static bool Parse(byte byte_code, BinaryReader reader, out ConditionalIntegerOperand operand)
{
operand = new ConditionalIntegerOperand();
switch (byte_code)
{
case 0x01:
operand.Size = ConditionalIntegerSize.Byte;
break;
case 0x02:
operand.Size = ConditionalIntegerSize.Short;
break;
case 0x03:
operand.Size = ConditionalIntegerSize.Dword;
break;
case 0x04:
operand.Size = ConditionalIntegerSize.Qword;
break;
default:
return(false);
}
operand.Value = reader.ReadInt64();
switch (reader.ReadByte())
{
case 0x01:
operand.Sign = ConditionalIntegerSign.Positive;
break;
case 0x02:
operand.Sign = ConditionalIntegerSign.Negative;
break;
case 0x03:
operand.Sign = ConditionalIntegerSign.None;
break;
default:
return(false);
}
switch (reader.ReadByte())
{
case 0x01:
operand.Base = ConditionalIntegerBase.Octal;
break;
case 0x02:
operand.Base = ConditionalIntegerBase.Decimal;
break;
case 0x03:
operand.Base = ConditionalIntegerBase.Hexadecimal;
break;
default:
return(false);
}
return(true);
}
private static bool Parse(byte[] data, bool expression, out List <ConditionalOperand> operands)
{
operands = new List <ConditionalOperand>();
BinaryReader reader = new BinaryReader(new MemoryStream(data));
if (expression && reader.ReadUInt32() != BINARY_MAGIC)
{
return(false);
}
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
byte token = reader.ReadByte();
switch (token)
{
case 0x00:
break;
case 0x01:
case 0x02:
case 0x03:
case 0x04:
if (!ConditionalIntegerOperand.Parse(token, reader, out ConditionalIntegerOperand int_op))
{
return(false);
}
operands.Add(int_op);
break;
case 0x10:
operands.Add(new ConditionalStringOperand(ReadString(reader)));
break;
case 0x18:
operands.Add(new ConditionalOctetStringOperand(ReadBytes(reader)));
break;
case 0x50:
if (!Parse(ReadBytes(reader), false, out List <ConditionalOperand> comp_ops))
{
return(false);
}
operands.Add(new ConditionalCompositeOperand(comp_ops));
break;
case 0x51:
var sid = Sid.Parse(ReadBytes(reader), false);
if (!sid.IsSuccess)
{
return(false);
}
operands.Add(new ConditionalSidOperand(sid.Result));
break;
default:
if (!expression || !Parse(token, reader, operands))
{
return(false);
}
break;
}
}
return(true);
}
