static int RunFile(string path)
{
if (File.Exists(path))
{
_loadedFile = path;
string source = File.ReadAllText(path);
SophieVM vm = new SophieVM { LoadModuleFn = LoadModule };
return (int)vm.Interpret(path, source);
}
return 66; // File Not Found
}
static void RunRepl()
{
SophieVM vm = new SophieVM();
Console.WriteLine("-- sophie v0.0.0");
string line = "";
for (; line != "/exit"; )
{
Console.Write("> ");
line = Console.ReadLine();
// TODO: Handle failure.
vm.Interpret("Prompt", line);
}
}
static bool WriteString(SophieVM vm, Obj[] stack, int argStart)
{
if (stack[argStart + 1] != null && stack[argStart + 1].Type == ObjType.Obj)
{
string s = stack[argStart + 1].ToString();
Console.Write(s);
}
stack[argStart] = Obj.Null;
return true;
}
static bool Time(SophieVM vm, Obj[] stack, int argStart)
{
stack[argStart] = new Obj((double)DateTime.Now.Ticks / 10000000);
return true;
}
static bool Read(SophieVM vm, Obj[] stack, int argStart)
{
stack[argStart] = Obj.MakeString(Console.ReadLine());
if (((ObjString)stack[argStart]).Str == "")
{
stack[argStart] = Obj.Null;
}
return true;
}
public static void LoadSystemLibrary(SophieVM vm)
{
vm.Interpret("", SystemLibSource);
ObjClass system = (ObjClass)vm.FindVariable("System");
vm.Primitive(system.ClassObj, "writeString_(_)", WriteString);
vm.Primitive(system.ClassObj, "read", Read);
vm.Primitive(system.ClassObj, "clock", Clock);
vm.Primitive(system.ClassObj, "time", Time);
}
public static string DumpByteCode(SophieVM vm, ObjFn fn)
{
string s = "";
int ip = 0;
byte[] bytecode = fn.Bytecode;
while (ip < bytecode.Length)
{
s += ip + ": ";
Instruction instruction = (Instruction)bytecode[ip++];
s += (instruction + " ");
switch (instruction)
{
case Instruction.Null:
case Instruction.False:
case Instruction.True:
case Instruction.Zero:
case Instruction.One:
case Instruction.Pop:
case Instruction.Dup:
case Instruction.CloseUpvalue:
case Instruction.Return:
case Instruction.End:
case Instruction.LoadLocal0:
case Instruction.LoadLocal1:
case Instruction.LoadLocal2:
case Instruction.LoadLocal3:
case Instruction.LoadLocal4:
case Instruction.LoadLocal5:
case Instruction.LoadLocal6:
case Instruction.LoadLocal7:
case Instruction.LoadLocal8:
s += ("\n");
break;
case Instruction.LoadLocal:
case Instruction.StoreLocal:
case Instruction.LoadUpvalue:
case Instruction.StoreUpvalue:
case Instruction.LoadFieldThis:
case Instruction.StoreFieldThis:
case Instruction.LoadField:
case Instruction.StoreField:
case Instruction.Class:
case Instruction.SmallConstant:
s += (bytecode[ip++] + "\n");
break;
case Instruction.Call0:
case Instruction.Call1:
case Instruction.Call2:
case Instruction.Call3:
case Instruction.Call4:
case Instruction.Call5:
case Instruction.Call6:
case Instruction.Call7:
case Instruction.Call8:
case Instruction.Call9:
case Instruction.Call10:
case Instruction.Call11:
case Instruction.Call12:
case Instruction.Call13:
case Instruction.Call14:
case Instruction.Call15:
case Instruction.Call16:
int method = (bytecode[ip] << 8) + bytecode[ip + 1];
s += vm.MethodNames[method] + "\n";
ip += 2;
break;
case Instruction.Constant:
case Instruction.LoadModuleVar:
case Instruction.StoreModuleVar:
case Instruction.Jump:
case Instruction.Loop:
case Instruction.JumpIf:
case Instruction.And:
case Instruction.Or:
case Instruction.MethodInstance:
case Instruction.MethodStatic:
case Instruction.LoadModule:
int method1 = (bytecode[ip] << 8) + bytecode[ip + 1];
s += method1 + "\n";
ip += 2;
break;
case Instruction.Super0:
case Instruction.Super1:
case Instruction.Super2:
case Instruction.Super3:
case Instruction.Super4:
case Instruction.Super5:
case Instruction.Super6:
case Instruction.Super7:
case Instruction.Super8:
case Instruction.Super9:
case Instruction.Super10:
case Instruction.Super11:
case Instruction.Super12:
case Instruction.Super13:
case Instruction.Super14:
case Instruction.Super15:
case Instruction.Super16:
case Instruction.ImportVariable:
s += (bytecode[ip++]);
s += (" ");
s += (bytecode[ip++]);
s += (" ");
s += (bytecode[ip++]);
s += (" ");
s += (bytecode[ip++] + "\n");
break;
case Instruction.Closure:
{
int constant = (bytecode[ip + 1] << 8) | bytecode[ip + 2];
ObjFn loadedFn = (ObjFn)fn.Constants[constant];
// There are two bytes for the constant, then two for each upvalue.
int j = 2 + (loadedFn.NumUpvalues * 2);
while (j > 0)
{
s += (bytecode[ip++]);
s += (" ");
j--;
}
s += "\n";
}
break;
}
}
return s;
}
public static ObjFn Compile(SophieVM vm, ObjModule module, string sourcePath, string source, bool printErrors)
{
Parser parser = new Parser
{
Vm = vm,
Module = module,
SourcePath = sourcePath,
Source = source,
TokenStart = 0,
CurrentChar = 0,
CurrentLine = 1,
Current = { Type = TokenType.Error, Start = 0, Length = 0, Line = 0 },
PrintErrors = printErrors,
HasError = false,
Raw = ""
};
Compiler compiler = new Compiler(parser, null, true);
// Read the first token.
compiler.NextToken();
compiler.IgnoreNewlines();
while (!compiler.Match(TokenType.Eof))
{
compiler.Definition();
// If there is no newline, it must be the end of the block on the same line.
if (!compiler.MatchLine())
{
compiler.Consume(TokenType.Eof, "Expect end of file.");
break;
}
}
compiler.Emit(Instruction.Null);
compiler.Emit(Instruction.Return);
// See if there are any implicitly declared module-level variables that never
// got an explicit definition.
// TODO: It would be nice if the error was on the line where it was used.
for (int i = 0; i < parser.Module.Variables.Count; i++)
{
ModuleVariable t = parser.Module.Variables[i];
if (t.Container == Obj.Undefined)
{
compiler.Error(string.Format("Variable '{0}' is used but not defined.", t.Name));
}
}
return compiler.EndCompiler();
}
// Creates a string containing an appropriate method not found error for a
// method with [symbol] on [classObj].
static void MethodNotFound(SophieVM vm, ObjClass classObj, int symbol)
{
vm.Fiber.Error = Obj.MakeString(string.Format("{0} does not implement '{1}'.", classObj.Name, vm.MethodNames[symbol]));
}