private static int DumpNextBytecodes(StreamWriter writer, UnBytecodeOwner function, byte[] bytes, int startOffset, int nextBytecodes)
{
using (var stream = new MemoryStream(bytes))
{
stream.Position = startOffset;
using (var reader = new BinaryReader(stream))
{
var bytecodeReader = new BytecodeReader(function.Package, reader);
for (int i = 0; i < nextBytecodes; i++)
{
try
{
var bytecodeToken = bytecodeReader.ReadNext();
writer.WriteLine($" {bytecodeToken}");
}
catch (Exception)
{
writer.WriteLine(" error reading next bytecode");
break;
}
}
return((int)reader.BaseStream.Position);
}
}
}
protected StatementList ReadBytecode(out BytecodeReader bcReader)
{
var s = new MemoryStream(_bytecode);
var reader = new EndianReader(s)
{
Endian = _self.FileRef.Endian
};
bcReader = new BytecodeReader(_self.FileRef, reader);
var statements = new StatementList((Statement)null);
bool keepParsing = true;
while (s.Position < s.Length && keepParsing)
{
int startOffset = (int)s.Position;
//Debug.WriteLine("Reading token at 0x" + startOffset.ToString("X4"));
BytecodeToken bc;
try
{
bc = bcReader.ReadNext();
}
catch (Exception)
{
//extra bytes at the end can trigger this. They are not used. may be something like byte aligning or something
break;
}
if (bc == null /*|| bc is EndOfScriptToken*/)
{
break;
}
statements.Add(new Statement(startOffset, (int)s.Position, bc, bcReader));
if (bc is ErrorBytecodeToken errorToken)
{
int bytecode = errorToken.UnknownBytecode;
if (bytecode >= 0)
{
ProblemRegistry.RegisterUnknownBytecode((byte)bytecode, this, errorToken.SubsequentBytes);
}
else
{
ProblemRegistry.RegisterBytecodeError(this, errorToken.ToString());
}
break;
}
if (/*bc is LabelTableToken || /*bc is StopToken ||*/ bc is EndOfScriptToken)
{
keepParsing = false;
break; //Nothing else to parse is bytecode
}
}
return(statements);
}
