static void CodeGeneratorTest()
{
CodeGenerator gen = new CodeGenerator(new MemoryStream());
Label loop = gen.DefineLabel();
Label testsub = gen.DefineLabel();
Label crash = gen.DefineLabel();
gen.Emit(OpCodes.Set, Argument.A, Argument.Literal(0x30));
gen.Emit(OpCodes.Set, Argument.Indirect(0x1000), Argument.Literal(0x20));
gen.Emit(OpCodes.Sub, Argument.A, Argument.Indirect(0x1000));
gen.Emit(OpCodes.Ifn, Argument.A, Argument.Literal(0x10));
gen.Emit(OpCodes.Set, Argument.PC, crash);
gen.Emit(OpCodes.Set, Argument.I, Argument.Literal(10));
gen.Emit(OpCodes.Set, Argument.A, Argument.Literal(0x2000));
gen.MarkLabel(loop);
gen.Emit(OpCodes.Set, Argument.Indirect(0x2000, Register.I), Argument.IndirectA);
gen.Emit(OpCodes.Sub, Argument.I, Argument.Literal(1));
gen.Emit(OpCodes.Ifn, Argument.I, Argument.Literal(0));
gen.Emit(OpCodes.Set, Argument.PC, loop);
gen.Emit(OpCodes.Set, Argument.X, Argument.Literal(0x4));
gen.Emit(OpCodes.Jsr, testsub);
gen.Emit(OpCodes.Set, Argument.PC, crash);
gen.MarkLabel(testsub);
gen.Emit(OpCodes.Shl, Argument.X, Argument.Literal(4));
gen.Emit(OpCodes.Set, Argument.PC, Argument.Pop);
gen.MarkLabel(crash);
gen.Emit(OpCodes.Set, Argument.PC, crash);
gen.Finish();
PrintDump(((MemoryStream)gen.OutputStream).ToArray(), 8);
Console.ReadLine();
}
public void Compile(TextReader assemblySourceReader,
Action<int, string, Tuple<long, byte[]>> listingHandler = null)
{
gen = new CodeGenerator(new MemoryStream());
errorsAndWarnings.Clear();
CompileResult = null;
int lineIndex = 0;
long lastPositionInStream = 0;
List<long> lineOffsets = null;
List<string> lines = null;
if (listingHandler != null)
{
lineOffsets = new List<long>();
lines = new List<string>();
}
string line = assemblySourceReader.ReadLine();
while (line != null)
{
try
{
CompileLine(lineIndex, line);
}
catch (ParseException ex)
{
errorsAndWarnings.Add(
new CodeIssue(lineIndex, IssueKind.Error, ex.Message));
}
if (listingHandler != null)
{
lineOffsets.Add(lastPositionInStream);
lines.Add(line);
}
lineIndex++;
lastPositionInStream = gen.OutputStream.Position;
line = assemblySourceReader.ReadLine();
}
CheckLabels();
try
{
gen.Finish();
}
catch (CodeGenerationException)
{ // eat 'incorrect label' exceptions
}
if (listingHandler != null)
{
var stream = (MemoryStream)gen.OutputStream;
stream.Position = 0;
for (int i = 0; i < lines.Count; i++)
{
long next = (i != lines.Count - 1)
? lineOffsets[i + 1] : stream.Length;
byte[] bytes = new byte[next - lineOffsets[i]];
// read generated bytes for line i
for (int j = 0; j < bytes.Length; j++)
{
bytes[j] = (byte)stream.ReadByte();
}
listingHandler(i, lines[i], Tuple.Create(lineOffsets[i], bytes));
}
}
if (errorsAndWarnings.Count(iss => iss.Kind == IssueKind.Error) == 0)
{
CompileResult = (MemoryStream)gen.OutputStream;
}
labels.Clear();
labelLines.Clear();
}
internal Label(CodeGenerator generator)
{
Generator = generator;
References = new List<int>();
}
