public static string Reformat(string input, ref int cursorPosition, out int scopeStart, out int scopeLength)
{
//return null; // uncomment to disable formatting
var oldCaret = cursorPosition;
scopeStart = 0;
scopeLength = 0;
try
{
// Example of reformatting:
var sourceCodeReader = new SourceCodeTokeniser();
var program = sourceCodeReader.Read(input, true);
var sb = new StringBuilder();
var focus = program.Reformat(0, sb, ref cursorPosition);
if (focus != null && focus != program)
{
scopeStart = focus.FormattedLocation;
scopeLength = focus.FormattedLength;
}
return(sb.ToString());
}
catch
{
cursorPosition = oldCaret;
return(null);
}
}
// ReSharper disable once UnusedMember.Global
/// <summary>
/// Start with source code, and run program to termination
/// </summary>
/// <param name="languageInput">Source code</param>
/// <param name="input">User typing input (for readline / readkey etc)</param>
/// <param name="output">Print output from the program</param>
/// <param name="trace">Flag. If true, write the entire interpreter flow to output</param>
/// <param name="printIL">Flag. If true, write a view of the bytecode IL to output</param>
/// <param name="traceMemory">Flag. If true, write memory and GC state</param>
/// <returns>Run time, excluding compile time</returns>
public static TimeSpan BuildAndRun(string languageInput, TextReader input, TextWriter output,
bool trace, bool printIL, bool traceMemory)
{
// Compile
var sourceCodeReader = new SourceCodeTokeniser();
var program = sourceCodeReader.Read(languageInput, false);
if (!program.IsValid)
{
output.WriteLine("Program is not well formed"); // TODO: be more helpful
return(TimeSpan.Zero);
}
ToNanCodeCompiler.BaseDirectory = baseDirectory;
var compiledOutput = ToNanCodeCompiler.CompileRoot(program, debug: false);
// Load
var stream = new MemoryStream();
compiledOutput.WriteToStream(stream);
stream.Seek(0, SeekOrigin.Begin);
var memoryModel = new RuntimeMemoryModel(stream);
if (printIL)
{
output.WriteLine("======= BYTE CODE SUMMARY ==========");
compiledOutput.AddSymbols(ByteCodeInterpreter.DebugSymbolsForBuiltIns());
output.WriteLine(memoryModel.ToString(compiledOutput.GetSymbols()));
output.WriteLine("====================================");
}
// Execute
var sw = new Stopwatch();
var interpreter = new ByteCodeInterpreter();
try
{
// Init the interpreter.
interpreter.Init(memoryModel, input, output, debugSymbols: compiledOutput.GetSymbols());
sw.Start();
interpreter.Execute(false, trace, false);
sw.Stop();
if (traceMemory)
{
output.WriteLine("======== GARBAGE SUMMARY ===========");
foreach (var token in memoryModel.Variables.PotentialGarbage)
{
output.WriteLine(NanTags.Describe(token));
}
output.WriteLine("====================================");
}
return(sw.Elapsed);
}
catch (Exception e)
{
output.WriteLine("Interpreter stopped at " + interpreter.LastPosition());
output.WriteLine("Exception : " + e.Message);
output.WriteLine("\r\n\r\n" + e.StackTrace);
sw.Stop();
return(sw.Elapsed);
}
}
private double EvaluateBuiltInFunction(ref int position, FuncDef kind, int nbParams, double[] param, Stack <int> returnStack, Stack <double> valueStack)
{
switch (kind)
{
// each element equal to the first
case FuncDef.Equal:
if (nbParams < 2)
{
throw new Exception("equals ( = ) must have at least two things to compare");
}
return(NanTags.EncodeBool(ListEquals(param)));
// Each element smaller than the last
case FuncDef.GreaterThan:
if (nbParams < 2)
{
throw new Exception("greater than ( > ) must have at least two things to compare");
}
return(NanTags.EncodeBool(FoldGreaterThan(param)));
// Each element larger than the last
case FuncDef.LessThan:
if (nbParams < 2)
{
throw new Exception("less than ( < ) must have at least two things to compare");
}
return(NanTags.EncodeBool(FoldLessThan(param)));
// Each element DIFFERENT TO THE FIRST (does not check set uniqueness!)
case FuncDef.NotEqual:
if (nbParams < 2)
{
throw new Exception("not-equal ( <> ) must have at least two things to compare");
}
return(NanTags.EncodeBool(!ListEquals(param)));
case FuncDef.Assert:
if (nbParams < 1)
{
return(NanTags.VoidReturn()); // assert nothing passes
}
var condition = param.ElementAt(0);
if (_memory.CastBoolean(condition) == false)
{
var msg = ConcatList(param, 1);
throw new Exception("Assertion failed: " + msg);
}
return(NanTags.VoidReturn());
case FuncDef.Random:
if (nbParams < 1)
{
return(rnd.NextDouble()); // 0 params - any size
}
if (nbParams < 2)
{
return(rnd.Next(_memory.CastInt(param.ElementAt(0)))); // 1 param - max size
}
return(rnd.Next(_memory.CastInt(param.ElementAt(0)), _memory.CastInt(param.ElementAt(1)))); // 2 params - range
case FuncDef.Eval:
var reader = new SourceCodeTokeniser();
var statements = _memory.CastString(param.ElementAt(0));
var programTmp = reader.Read(statements, false);
var bin = ToNanCodeCompiler.CompileRoot(programTmp, false);
var interpreter = new ByteCodeInterpreter();
interpreter.Init(new RuntimeMemoryModel(bin, _memory.Variables), _input, _output, DebugSymbols);
return(interpreter.Execute(false, _runningVerbose, false).Result);
case FuncDef.Call:
NanTags.DecodePointer(param.ElementAt(0), out var target, out var type);
if (type != DataType.PtrString && type != DataType.PtrStaticString)
{
throw new Exception("Tried to call a function by name, but passed a '" + type + "' at " + position);
}
// this should be a string, but we need a function name hash -- so calculate it:
var strName = _memory.DereferenceString(target);
var functionNameHash = NanTags.GetCrushedName(strName);
nbParams--;
var newParam = param.Skip(1).ToArray();
return(EvaluateFunctionCall(ref position, functionNameHash, nbParams, newParam, returnStack, valueStack));
case FuncDef.LogicNot:
if (nbParams != 1)
{
throw new Exception("'not' should be called with one argument");
}
var bval = _memory.CastBoolean(param.ElementAt(0));
return(NanTags.EncodeBool(!bval));
case FuncDef.LogicOr:
{
bool more = nbParams > 0;
int i = 0;
while (more)
{
var bresult = _memory.CastBoolean(param.ElementAt(i));
if (bresult)
{
return(NanTags.EncodeBool(true));
}
i++;
more = i < nbParams;
}
return(NanTags.EncodeBool(false));
}
case FuncDef.LogicAnd:
{
bool more = nbParams > 0;
int i = 0;
while (more)
{
var bresult = _memory.CastBoolean(param.ElementAt(i));
if (!bresult)
{
return(NanTags.EncodeBool(false));
}
i++;
more = i < nbParams;
}
return(NanTags.EncodeBool(true));
}
case FuncDef.ReadKey:
return(_memory.StoreStringAndGetReference(((char)_input.Read()).ToString()));
case FuncDef.ReadLine:
return(_memory.StoreStringAndGetReference(_input.ReadLine()));
case FuncDef.Print:
{
string lastStr = null;
foreach (var v in param)
{
lastStr = _memory.CastString(v);
_output.Write(lastStr);
}
if (lastStr != "")
{
_output.WriteLine();
}
}
return(NanTags.VoidReturn());
case FuncDef.Substring:
if (nbParams == 2)
{
var newString = _memory.CastString(param.ElementAt(0)).Substring(_memory.CastInt(param.ElementAt(1)));
return(_memory.StoreStringAndGetReference(newString));
}
else if (nbParams == 3)
{
int start = _memory.CastInt(param.ElementAt(1));
int length = _memory.CastInt(param.ElementAt(2));
string s = _memory.CastString(param.ElementAt(0)).Substring(start, length);
return(_memory.StoreStringAndGetReference(s));
}
else
{
throw new Exception("'Substring' should be called with 2 or 3 parameters");
}
case FuncDef.Length:
return(_memory.CastString(param.ElementAt(0)).Length);
case FuncDef.Replace:
if (nbParams != 3)
{
throw new Exception("'Replace' should be called with 3 parameters");
}
string exp = _memory.CastString(param.ElementAt(0));
string oldValue = _memory.CastString(param.ElementAt(1));
string newValue = _memory.CastString(param.ElementAt(2));
exp = exp.Replace(oldValue, newValue);
return(_memory.StoreStringAndGetReference(exp));
case FuncDef.Concat:
var builder = new StringBuilder();
foreach (var v in param)
{
builder.Append(_memory.CastString(v));
}
return(_memory.StoreStringAndGetReference(builder.ToString()));
case FuncDef.UnitEmpty:
{ // valueless marker (like an empty object)
return(NanTags.EncodeNonValue(NonValueType.Unit));
}
case FuncDef.MathAdd:
if (nbParams == 1)
{
return(param[0]);
}
return(param.ChainSum());
case FuncDef.MathSub:
if (nbParams == 1)
{
return(-param[0]);
}
return(param.ChainDifference());
case FuncDef.MathProd:
if (nbParams == 1)
{
throw new Exception("Uniary '*' is not supported");
}
return(param.ChainProduct());
case FuncDef.MathDiv:
if (nbParams == 1)
{
throw new Exception("Uniary '/' is not supported");
}
return(param.ChainDivide());
case FuncDef.MathMod:
if (nbParams == 1)
{
return(param[0] % 2);
}
return(param.ChainRemainder());
default:
throw new Exception("Unrecognised built-in! Type = " + ((int)kind));
}
}