private void PatchJump(int offset)
{
// We adjust by two for the jump offset
int jump = _Chunk.SizeCode - offset - 2;
if (jump > ushort.MaxValue)
{
throw new CompilerException(Tokens.Peek(), "Too much code to jump over.");
}
_Chunk.WriteCodeAt(offset, (byte)((jump >> 8) & 0xff));
_Chunk.WriteCodeAt(offset + 1, (byte)(jump & 0xff));
}
private static void DoFixups(GearsChunk chunk, int origin, Func <GearsValue, int> makeConstant, Func <string, int> makeConstant2, List <LoxCompiler> fns)
{
foreach (LoxCompiler fn in fns)
{
int codeBase = chunk.SizeCode;
chunk.WriteCode(fn._Chunk._Code, fn._Chunk._Lines, fn._Chunk.SizeCode);
chunk.WriteCodeAt(origin + fn._OriginAddress, (byte)(codeBase >> 8));
chunk.WriteCodeAt(origin + fn._OriginAddress + 1, (byte)(codeBase & 0xff));
foreach (LoxCompilerFixup fixup in fn._FixupConstants)
{
GearsValue value = fn._Chunk.ReadConstantValue(fixup.Value);
int constantFixup = makeConstant(value); // as fixup
chunk.WriteCodeAt(codeBase + fixup.Address, (byte)(constantFixup >> 8));
chunk.WriteCodeAt(codeBase + fixup.Address + 1, (byte)(constantFixup & 0xff));
}
foreach (LoxCompilerFixup fixup in fn._FixupStrings)
{
string value = fn._Chunk.Strings.ReadStringConstant(fixup.Value);
int constantFixup = makeConstant2(value); // as fixup
chunk.WriteCodeAt(codeBase + fixup.Address, (byte)(constantFixup >> 8));
chunk.WriteCodeAt(codeBase + fixup.Address + 1, (byte)(constantFixup & 0xff));
}
DoFixups(chunk, codeBase, makeConstant, makeConstant2, fn._FixupFns);
chunk.Compress();
}
}