public void OnLoad(ConfigNode node)
{
try
{
var scriptBuilder = new StringBuilder();
foreach (ConfigNode contextNode in node.GetNodes("context"))
{
foreach (ConfigNode varNode in contextNode.GetNodes("variables"))
{
foreach (ConfigNode.Value value in varNode.values)
{
string varValue = PersistenceUtilities.DecodeLine(value.value);
scriptBuilder.AppendLine(string.Format("set {0} to {1}.", value.name, varValue));
}
}
}
if (shared.ScriptHandler == null || scriptBuilder.Length <= 0) return;
var programBuilder = new ProgramBuilder();
// TODO: figure out how to store the filename and reload it for arg 1 below:
// (Possibly all of OnLoad needs work because it never seemed to bring
// back the context fully right anyway, which is why this hasn't been
// addressed yet).
try
{
SafeHouse.Logger.Log("Parsing Context:\n\n" + scriptBuilder);
// TODO - make this set up compiler options and pass them in properly, so we can detect built-ins properly.
// (for the compiler to detect the difference between a user function call and a built-in, it needs to be
// passed the FunctionManager object from Shared.)
// this isn't fixed mainly because this OnLoad() code is a major bug fire already anyway and needs to be
// fixed, but that's way out of scope for the moment:
programBuilder.AddRange(shared.ScriptHandler.Compile("reloaded file", 1, scriptBuilder.ToString()));
List<Opcode> program = programBuilder.BuildProgram();
RunProgram(program, true);
}
catch (NullReferenceException ex)
{
SafeHouse.Logger.Log("program builder failed on load. " + ex.Message);
}
}
catch (Exception e)
{
if (shared.Logger != null) shared.Logger.Log(e);
}
}
public override void Execute(SharedObjects shared)
{
// run() is strange. It needs two levels of args - the args to itself, and the args it is meant to
// pass on to the program it's invoking. First, these are the args to run itself:
object volumeId = PopValueAssert(shared, true);
string fileName = PopValueAssert(shared, true).ToString();
AssertArgBottomAndConsume(shared);
// Now the args it is going to be passing on to the program:
var progArgs = new List<Object>();
int argc = CountRemainingArgs(shared);
for (int i = 0; i < argc; ++i)
progArgs.Add(PopValueAssert(shared, true));
AssertArgBottomAndConsume(shared);
if (shared.VolumeMgr == null) return;
if (shared.VolumeMgr.CurrentVolume == null) throw new Exception("Volume not found");
ProgramFile file = shared.VolumeMgr.CurrentVolume.GetByName(fileName, true);
if (file == null) throw new Exception(string.Format("File '{0}' not found", fileName));
if (shared.ScriptHandler == null) return;
if (volumeId != null)
{
Volume targetVolume = shared.VolumeMgr.GetVolume(volumeId);
if (targetVolume != null)
{
if (shared.ProcessorMgr != null)
{
string filePath = string.Format("{0}/{1}", shared.VolumeMgr.GetVolumeRawIdentifier(targetVolume), fileName);
var options = new CompilerOptions { LoadProgramsInSameAddressSpace = true, FuncManager = shared.FunctionManager };
List<CodePart> parts = shared.ScriptHandler.Compile(filePath, 1, file.StringContent, "program", options);
var builder = new ProgramBuilder();
builder.AddRange(parts);
List<Opcode> program = builder.BuildProgram();
shared.ProcessorMgr.RunProgramOn(program, targetVolume);
}
}
else
{
throw new KOSFileException("Volume not found");
}
}
else
{
// clear the "program" compilation context
shared.ScriptHandler.ClearContext("program");
string filePath = shared.VolumeMgr.GetVolumeRawIdentifier(shared.VolumeMgr.CurrentVolume) + "/" + fileName;
var options = new CompilerOptions { LoadProgramsInSameAddressSpace = true, FuncManager = shared.FunctionManager };
var programContext = ((CPU)shared.Cpu).SwitchToProgramContext();
List<CodePart> codeParts;
if (file.Category == FileCategory.KSM)
{
string prefix = programContext.Program.Count.ToString();
codeParts = shared.VolumeMgr.CurrentVolume.LoadObjectFile(filePath, prefix, file.BinaryContent);
}
else
{
try
{
codeParts = shared.ScriptHandler.Compile(filePath, 1, file.StringContent, "program", options);
}
catch (Exception)
{
// If it died due to a compile error, then we won't really be able to switch to program context
// as was implied by calling Cpu.SwitchToProgramContext() up above. The CPU needs to be
// told that it's still in interpreter context, or else it fails to advance the interpreter's
// instruction pointer and it will just try the "call run()" instruction again:
shared.Cpu.BreakExecution(false);
throw;
}
}
programContext.AddParts(codeParts);
}
// Because run() returns FIRST, and THEN the CPU jumps to the new program's first instruction that it set up,
// it needs to put the return stack in a weird order. Its return value needs to be buried UNDER the args to the
// program it's calling:
UsesAutoReturn = false;
shared.Cpu.PushStack(0); // dummy return that all functions have.
// Put the args for the program being called back on in the same order they were in before (so read the list backward):
shared.Cpu.PushStack(new KOSArgMarkerType());
for (int i = argc - 1; i >= 0; --i)
shared.Cpu.PushStack(progArgs[i]);
}