public GenericScriptObject(params Object[] args)
{
if (args.Length % 2 != 0)
{
throw new InvalidProgramException("Generic Script Object must be initialized with pairs");
}
for (int i = 0; i < args.Length; i += 2)
{
SetProperty(ScriptObject.AsString(args[i]), args[i + 1]);
}
}
public String AsString(int depth)
{
if (depth < 0)
{
return("L" + Count);
}
return("L" + Count + "{" + String.Join(", ", this.Select((o) =>
{
return ScriptObject.AsString(o, depth - 1);
})) + " }");
}
public String AsString(int depth)
{
if (depth < 0)
{
return(this.GetType().Name);
}
else
{
return("SO{" + String.Join(", ", (this as ScriptObject).ListProperties().Select((o) =>
{
return o.ToString() + ": " + ScriptObject.AsString(this.GetProperty(o.ToString()), depth - 1);
})) + " }");
}
}
public void PrepareEnvironment(Engine engine)
{
SetupStandardConsoleFunctions(engine);
if (SetupHost != null)
{
SetupHost(engine);
}
engine.AddFunction("run-file", "Load and run a file.",
(_context, arguments) =>
{
var text = System.IO.File.ReadAllText(ScriptObject.AsString(arguments[0]));
return(engine.EvaluateString(_context, text, ScriptObject.AsString(arguments[0]), false));
},
Arguments.Arg("name"));
}
private ScriptObject defunImple(Context context, ScriptList arguments, bool addToScope)
{
var functionName = ArgumentType <String>(arguments[0]);
ScriptList argumentInfo = null;
try
{
argumentInfo = ArgumentType <ScriptList>(arguments[1]);
}
catch (ScriptError e)
{
context.RaiseNewError(e.Message, context.currentNode);
return(null);
}
var functionBody = ArgumentType <ScriptObject>(arguments[2]);
var newFunction = Function.MakeFunction(
functionName,
argumentInfo,
"Script-defined function",
functionBody,
CopyScope(context.Scope));
if (arguments[3] != null)
{
newFunction["@help"] = ScriptObject.AsString(arguments[3]);
}
if (addToScope)
{
(newFunction["declaration-scope"] as Scope).PushVariable(functionName, newFunction);
}
return(newFunction);
}
private static object SetObjectProperty(Context context, Object obj, String name, Object value)
{
if (obj is ScriptObject)
{
try
{
(obj as ScriptObject)[name] = value;
}
catch (Exception e)
{
context.RaiseNewError("System Exception: " + e.Message, context.currentNode);
}
}
else
{
var field = obj.GetType().GetField(ScriptObject.AsString(name));
if (field != null)
{
field.SetValue(obj, value);
}
else
{
var prop = obj.GetType().GetProperty(ScriptObject.AsString(name));
if (prop != null)
{
prop.SetValue(obj, value, null);
}
else
{
context.RaiseNewError("Could not find member with name '" + ScriptObject.AsString(name) + "' on object" +
" of type '" + obj.GetType().ToString() + "'", context.currentNode);
}
}
}
return(value);
}
private void SetupVariableFunctions()
{
AddFunction("var",
"name value : Assign value to a variable named [name].", (context, arguments) =>
{
if (specialVariables.ContainsKey(ScriptObject.AsString(arguments[0])))
{
context.RaiseNewError("Can't assign to protected variable name.", context.currentNode);
}
else
{
try
{
context.Scope.ChangeVariable(ScriptObject.AsString(arguments[0]), arguments[1]);
}
catch (Exception e) { context.RaiseNewError(e.Message, context.currentNode); }
}
return(arguments[1]);
},
Arguments.Mutator(Arguments.Lazy("name"), "(@identifier value)"),
Arguments.Arg("value"));
AddFunction("let",
"^( ^(\"name\" value ?cleanup-code) ^(...) ) code : Create temporary variables, run code. Optional clean-up code for each variable.",
(context, arguments) =>
{
var variables = ArgumentType <ScriptObject>(arguments[0]);
if (!String.IsNullOrEmpty(variables.gsp("@prefix"))) /* Raise warning */ } {
var code = ArgumentType <ScriptObject>(arguments[1]);
var cleanUp = new List <LetVariable>();
Object result = null;
foreach (var item in variables._children)
{
var sitem = item as ScriptObject;
if (sitem._children.Count <= 1 || sitem._children.Count > 3)
{
context.RaiseNewError("Bad variable definition in let", context.currentNode);
goto RUN_CLEANUP;
}
var nameObject = sitem._child(0) as ScriptObject;
var varName = "";
if (nameObject.gsp("@type") == "token")
{
varName = nameObject.gsp("@token");
}
else
{
varName = AutoBind.StringArgument(Evaluate(context, nameObject, true));
}
if (context.evaluationState != EvaluationState.Normal)
{
goto RUN_CLEANUP;
}
var varValue = Evaluate(context, sitem._child(1), false);
if (context.evaluationState != EvaluationState.Normal)
{
goto RUN_CLEANUP;
}
context.Scope.PushVariable(varName, varValue);
cleanUp.Add(new LetVariable
{
name = varName,
cleanupCode = sitem._children.Count == 3 ? sitem._child(2) : null
});
}
result = Evaluate(context, code, true);
RUN_CLEANUP:
var pre_state = context.evaluationState;
foreach (var item in cleanUp)
{
if (item.cleanupCode != null)
{
context.evaluationState = EvaluationState.Normal;
Evaluate(context, item.cleanupCode, true, true);
}
context.Scope.PopVariable(item.name);
}
context.evaluationState = pre_state;
return(result);
},
private void SetupFileFunctions()
{
var file_functions = new GenericScriptObject();
file_functions.SetProperty("open", Function.MakeSystemFunction("open",
Arguments.Args("file-name", "mode"), "Opens a file",
(context, arguments) =>
{
var mode = AutoBind.StringArgument(arguments[1]).ToUpperInvariant();
if (mode == "READ")
{
return(System.IO.File.OpenText(AutoBind.StringArgument(arguments[0])));
}
else if (mode == "WRITE")
{
return(System.IO.File.CreateText(AutoBind.StringArgument(arguments[0])));
}
else if (mode == "APPEND")
{
return(System.IO.File.AppendText(AutoBind.StringArgument(arguments[0])));
}
else
{
context.RaiseNewError("Invalid mode specifier", context.currentNode);
}
return(null);
}));
file_functions.SetProperty("close", Function.MakeSystemFunction("close",
Arguments.Args("file"), "Close a file.",
(context, arguments) =>
{
if (arguments[0] is System.IO.StreamReader)
{
(arguments[0] as System.IO.StreamReader).Close();
}
else if (arguments[0] is System.IO.StreamWriter)
{
(arguments[0] as System.IO.StreamWriter).Close();
}
else
{
context.RaiseNewError("Argument is not a file.", context.currentNode);
}
return(null);
}));
file_functions.SetProperty("read-line", Function.MakeSystemFunction("read-line",
Arguments.Args("file"), "Read a line from a file.",
(context, arguments) =>
{
var file = arguments[0] as System.IO.StreamReader;
if (file == null)
{
context.RaiseNewError("Argument is not a read file.", context.currentNode);
return(null);
}
return(file.ReadLine());
}));
file_functions.SetProperty("read-all", Function.MakeSystemFunction("read-all",
Arguments.Args("file"), "Read all of a file.",
(context, arguments) =>
{
var file = arguments[0] as System.IO.StreamReader;
if (file == null)
{
context.RaiseNewError("Argument is not a read file.", context.currentNode);
return(null);
}
return(file.ReadToEnd());
}));
file_functions.SetProperty("write", Function.MakeSystemFunction("write",
Arguments.Args("file", "text"), "Write to a file.",
(context, arguments) =>
{
var file = arguments[0] as System.IO.StreamWriter;
if (file == null)
{
context.RaiseNewError("Argument is not a write file.", context.currentNode);
return(null);
}
file.Write(ScriptObject.AsString(arguments[1]));
return(null);
}));
file_functions.SetProperty("more", Function.MakeSystemFunction("more",
Arguments.Args("file"), "Is there more to read in this file?",
(context, arguments) =>
{
var file = arguments[0] as System.IO.StreamReader;
if (file == null)
{
context.RaiseNewError("Argument is not a read file.", context.currentNode);
return(null);
}
if (file.EndOfStream)
{
return(null);
}
return(true);
}));
AddGlobalVariable("file", c => file_functions);
}
private void SetupStandardLibrary()
{
//types.Add("STRING", new TypeString());
//types.Add("INTEGER", new TypePrimitive(typeof(int), true));
//types.Add("LIST", new TypeList());
//types.Add("OBJECT", new TypePrimitive(typeof(ScriptObject), false));
//types.Add("CODE", new TypePrimitive(typeof(ScriptObject), false));
//types.Add("IDENTIFIER", new TypeString());
//types.Add("FUNCTION", new TypePrimitive(typeof(ScriptObject), false));
//types.Add("ANYTHING", Type.Anything);
//types.Add("FLOAT", new TypePrimitive(typeof(float), true));
//foreach (var type in types)
// type.Value.Typename = type.Key;
specialVariables.Add("null", (c) => { return(null); });
specialVariables.Add("functions", (c) => { return(new ScriptList(functions.Select((pair) => { return pair.Value; }))); });
specialVariables.Add("true", (c) => { return(true); });
specialVariables.Add("false", (c) => { return(null); });
specialVariables.Add("@scope", (c) => { return(c.Scope); });
//AddFunction("net-module", "Loads a module from a .net assembly",
// (context, arguments) =>
// {
// NetModule.LoadModule(context, this, ScriptObject.AsString(arguments[0]), ScriptObject.AsString(arguments[1]));
// return null;
// }, "string assembly", "string module");
AddFunction("@list", "If the argument is a list, great. If not, now it is.",
(context, arguments) =>
{
if (arguments[0] == null)
{
return(new ScriptList());
}
if (arguments[0] is ScriptList)
{
return(arguments[0]);
}
return(new ScriptList(arguments[0]));
},
Arguments.Arg("value"));
AddFunction("@lazy-list", "Mutates a lazy argument into a list. Effectively makes the ^ optional.",
(context, arguments) =>
{
var node = arguments[0] as ScriptObject;
if (node == null)
{
return(new ScriptList());
}
var r = new ScriptList();
foreach (var child in node._children)
{
r.Add(Evaluate(context, child));
}
return(r);
}, Arguments.Arg("arg"));
AddFunction("@identifier", "Mutates a lazy argument. If it's a token, return as a string. If not, evaluate and return as a string.",
(context, arguments) =>
{
var arg = arguments[0] as ScriptObject;
if (arg != null && arg.gsp("@type") == "token")
{
return(arg.gsp("@token"));
}
return(ScriptObject.AsString(Evaluate(context, arg, true)));
}, Arguments.Arg("arg"));
AddFunction("@identifier-if-token", "Mutates a lazy argument. If it's a token, return as a string. If not, evaluate and return.",
(context, arguments) =>
{
var arg = arguments[0] as ScriptObject;
if (arg != null && arg.gsp("@type") == "token")
{
return(arg.gsp("@token"));
}
return(Evaluate(context, arg, true));
}, Arguments.Arg("arg"));
AddFunction("arg", "create an argument", (context, arguments) =>
{
if (arguments[0] is ScriptObject)
{
return(arguments[0]);
}
else
{
return(Arguments.Arg(ScriptObject.AsString(arguments[0])));
}
}, Arguments.Mutator(Arguments.Lazy("name"), "(@identifier value)"));
AddFunction("arg-lazy", "create a lazy argument", (context, arguments) =>
{
if (arguments[0] is ScriptObject)
{
(arguments[0] as ScriptObject)["@lazy"] = true;
return(arguments[0]);
}
else
{
return(Arguments.Lazy(Arguments.Arg(ScriptObject.AsString(arguments[0]))));
}
}, Arguments.Mutator(Arguments.Lazy("name"), "(@identifier-if-token value)"));
AddFunction("arg-optional", "create an optional argument", (context, arguments) =>
{
if (arguments[0] is ScriptObject)
{
(arguments[0] as ScriptObject)["@optional"] = true;
return(arguments[0]);
}
else
{
return(Arguments.Optional(Arguments.Arg(ScriptObject.AsString(arguments[0]))));
}
}, Arguments.Mutator(Arguments.Lazy("name"), "(@identifier-if-token value)"));
AddFunction("arg-repeat", "create a repeat argument", (context, arguments) =>
{
if (arguments[0] is ScriptObject)
{
(arguments[0] as ScriptObject)["@repeat"] = true;
return(arguments[0]);
}
else
{
return(Arguments.Repeat(Arguments.Arg(ScriptObject.AsString(arguments[0]))));
}
}, Arguments.Mutator(Arguments.Lazy("name"), "(@identifier-if-token value)"));
AddFunction("arg-mutator", "Add a mutator to an argument", (context, arguments) =>
{
if (arguments[0] is ScriptObject)
{
(arguments[0] as ScriptObject)["@mutator"] = arguments[1];
return(arguments[0]);
}
else
{
var r = Arguments.Arg(ScriptObject.AsString(arguments[0]));
r["@mutator"] = arguments[1];
return(r);
}
}, Arguments.Mutator(Arguments.Lazy("name"), "(@identifier-if-token value)"), Arguments.Lazy("mutator"));
AddFunction("eval", "Evaluates it's argument.",
(context, arguments) =>
{
return(Evaluate(context, arguments[0], true));
},
Arguments.Arg("arg"));
AddFunction("lastarg", "Returns last argument",
(context, arguments) =>
{
return((arguments[0] as ScriptList).LastOrDefault());
},
Arguments.Repeat("child"));
AddFunction("nop", "Returns null.",
(context, arguments) => { return(null); },
Arguments.Optional(Arguments.Repeat("value")));
AddFunction("coalesce", "B if A is null, A otherwise.",
(context, arguments) =>
{
if (arguments[0] == null)
{
return(Evaluate(context, arguments[1], true, false));
}
else
{
return(arguments[0]);
}
},
Arguments.Arg("A"), Arguments.Lazy("B"));
AddFunction("raise-error", "Raises a new error.",
(context, arguments) =>
{
context.RaiseNewError(MISP.ScriptObject.AsString(arguments[0]), context.currentNode);
return(null);
},
Arguments.Arg("message"));
AddFunction("catch-error", "Evaluate and return A unless error generated; if error Evaluate and return B.",
(context, arguments) =>
{
var result = Evaluate(context, arguments[0], true, false);
if (context.evaluationState == EvaluationState.UnwindingError)
{
context.evaluationState = EvaluationState.Normal;
return(Evaluate(context, arguments[1], true, false));
}
return(result);
},
Arguments.Lazy("good"),
Arguments.Lazy("bad"));
AddFunction("break", "Aborts loops and supplies a return value.",
(context, arguments) =>
{
context.evaluationState = EvaluationState.UnwindingBreak;
context.breakObject = arguments[0];
return(null);
}, Arguments.Arg("value"));
AddFunction("reflect", "Examine an object using .net reflection.",
(context, arguments) =>
{
var stream = new System.IO.StringWriter();
if (arguments[0] == null)
{
stream.Write("null\n");
}
else
{
stream.Write(arguments[0].GetType().Name + "\n");
foreach (var field in arguments[0].GetType().GetFields())
{
stream.Write("field: " + field.Name + " " + field.FieldType.Name + "\n");
}
foreach (var method in arguments[0].GetType().GetMethods())
{
stream.Write("method: " + method.Name + " " + method.ReturnType.Name + "\n");
}
}
return(stream.ToString());
}, Arguments.Arg("object"));
AddFunction("lazy-overloads", "Examine all possible overloads of a lazy binding.",
(context, arguments) =>
{
var binding = arguments[0] as ScriptObject;
var stream = new System.IO.StringWriter();
if (binding.GetProperty("@lazy-reflection") == null)
{
stream.Write("Not a lazy binding object.");
}
else
{
var sourceType = binding.GetProperty("@source-type") as System.Type;
var methods = sourceType.GetMethods().Where((m) => m.Name == binding.gsp("@lazy-reflection"));
stream.Write("Methods found:\n");
foreach (var method in methods)
{
stream.Write("args: ");
stream.Write(String.Join(" ", method.GetParameters().Select((p) => p.ParameterType.Name)));
stream.Write("\n");
}
}
return(stream.ToString());
}, Arguments.Arg("object"));
AddFunction("emitt", "Emit in tight-formatting style.",
(context, arguments) =>
{
return(TightFormat(arguments[0]));
}, Arguments.Arg("object", "Meant for use with objects generated via AutoBind."));
AddFunction("emitf", "Emit a function",
(context, arguments) =>
{
var stream = new System.IO.StringWriter();
var obj = arguments[0] as ScriptObject;
stream.Write("Name: ");
stream.Write(obj.gsp("@name") + "\nHelp: " + obj.gsp("@help") + "\nArguments: \n");
foreach (var arg_ in obj["@arguments"] as ScriptList)
{
stream.Write(" ");
var arg = arg_ as ScriptObject;
//stream.Write((arg["@type"] as Type).Typename + " ");
if (arg["@optional"] != null)
{
stream.Write("?");
}
if (arg["@repeat"] != null)
{
stream.Write("+");
}
if (arg["@lazy"] != null)
{
stream.Write("*");
}
stream.Write(arg["@name"] + " ");
if (arg["@mutator"] != null)
{
Engine.SerializeCode(stream, arg["@mutator"] as ScriptObject);
}
if (arg["@help"] != null)
{
stream.Write(" - " + arg["@help"].ToString());
}
stream.Write("\n");
}
stream.Write("\nBody: ");
if (obj["@function-body"] is ScriptObject)
{
Engine.SerializeCode(stream, obj["@function-body"] as ScriptObject);
}
else
{
stream.Write("System");
}
stream.Write("\n");
return(stream.ToString());
},
Arguments.Arg("func", "Must be a function."));
AddFunction("serialize", "Serialize an object",
(context, arguments) =>
{
var stream = new System.IO.StringWriter();
SerializeObject(stream, arguments[0] as ScriptObject);
return(stream.ToString());
},
Arguments.Arg("object"));
SetupVariableFunctions();
SetupObjectFunctions();
SetupMathFunctions();
SetupFunctionFunctions();
SetupBranchingFunctions();
SetupLoopFunctions();
SetupListFunctions();
SetupStringFunctions();
SetupEncryptionFunctions();
SetupFileFunctions();
SetupRegexFunctions();
}
private void SetupStringFunctions()
{
AddFunction("split", "Split a string into pieces", (context, arguments) =>
{
var pieces = AutoBind.StringArgument(arguments[0]).Split(
new String[] { AutoBind.StringArgument(arguments[1]) },
Int32.MaxValue, StringSplitOptions.RemoveEmptyEntries);
var r = new ScriptList(pieces);
return(r);
}, Arguments.Arg("string"), Arguments.Arg("split-chars"));
AddFunction("strlen", "string : Returns length of string.",
(context, arguments) =>
{
return(ScriptObject.AsString(arguments[0]).Length);
}, Arguments.Arg("string"));
AddFunction("strind",
"string n : Returns nth element in string.",
(context, arguments) =>
{
var index = arguments[1] as int?;
if (index == null || !index.HasValue)
{
return(null);
}
if (index.Value < 0)
{
return(null);
}
var str = ScriptObject.AsString(arguments[0]);
if (index.Value >= str.Length)
{
return(null);
}
return(str[index.Value]);
},
Arguments.Arg("string"),
Arguments.Arg("n"));
AddFunction("substr", "Returns a portion of the input string.",
(context, arguments) =>
{
var str = ScriptObject.AsString(arguments[0]);
var start = AutoBind.IntArgument(arguments[1]);
if (arguments[2] == null)
{
return(str.Substring(start));
}
else
{
return(str.Substring(start, AutoBind.IntArgument(arguments[2])));
}
},
Arguments.Arg("string"),
Arguments.Arg("start"),
Arguments.Optional("length"));
AddFunction("strcat", "Concatenate many strings into one.",
(context, arguments) =>
{
var r = new StringBuilder();
foreach (var obj in AutoBind.ListArgument(arguments[0]))
{
r.Append(ScriptObject.AsString(obj));
}
return(r.ToString());
},
Arguments.Repeat("item"));
AddFunction("itoa", "Change a number to the string representation.",
(context, arguments) =>
{
return(arguments[0].ToString());
},
Arguments.Arg("i"));
AddFunction("atoi", "",
(context, arguments) =>
{
return(Convert.ToInt32(arguments[0]));
},
Arguments.Arg("i"));
AddFunction("unescape", "", (context, arguments) =>
{
return(Console.UnescapeString(ScriptObject.AsString(arguments[0])));
},
Arguments.Arg("string"));
AddFunction("format", "Format a string.",
(context, arguments) =>
{
return(String.Format(AutoBind.StringArgument(arguments[0]),
AutoBind.ListArgument(arguments[1]).ToArray()));
},
Arguments.Arg("format-string"),
Arguments.Optional(Arguments.Repeat("value")));
}
public static string StringArgument(Object obj)
{
return(ScriptObject.AsString(obj));
}
public Object Evaluate(
Context context,
Object what,
bool ignoreStar = false,
bool discardResults = false)
{
if (context.evaluationState != EvaluationState.Normal)
{
throw new ScriptError("Invalid Context", null);
}
if (context.callDepth >= context.maximumCallDepth)
{
context.RaiseNewError("Overflow.", null);
return(null);
}
context.callDepth += 1; //All exit points must decrement depth.
if (what is String)
{
var r = EvaluateString(context, what as String, "", discardResults);
context.callDepth -= 1;
return(r);
}
else if (!(what is ScriptObject))
{
context.callDepth -= 1;
return(what);
}
var node = what as ScriptObject;
context.currentNode = node;
if (context.limitExecutionTime && (DateTime.Now - context.executionStart > context.allowedExecutionTime))
{
context.RaiseNewError("Timeout.", node);
context.callDepth -= 1;
return(null);
}
if (node.gsp("@prefix") == "*" && !ignoreStar) //Object is a quoted node
{
context.callDepth -= 1;
return(node);
}
var type = node.gsp("@type");
if (String.IsNullOrEmpty(type))
{
context.callDepth -= 1;
return(node);
} //Object is not evaluatable code.
object result = null;
if (type == "string")
{
result = node["@token"];
}
else if (type == "stringexpression")
{
if (discardResults) //Don't bother assembling the string expression.
{
foreach (var piece in node._children)
{
if ((piece as ScriptObject).gsp("@type") == "string")
{
continue;
}
else
{
Evaluate(context, piece);
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
}
result = null;
}
else
{
if (node._children.Count == 1) //If there's only a single item, the result is that item.
{
result = Evaluate(context, node._child(0));
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
else
{
var resultString = String.Empty;
foreach (var piece in node._children)
{
resultString += ScriptObject.AsString(Evaluate(context, piece));
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
result = resultString;
}
}
}
else if (type == "token")
{
result = LookupToken(context, node.gsp("@token"));
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
else if (type == "memberaccess")
{
var lhs = Evaluate(context, node._child(0));
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1; return(null);
}
String rhs = "";
if ((node._child(1) as ScriptObject).gsp("@type") == "token")
{
rhs = (node._child(1) as ScriptObject).gsp("@token");
}
else
{
rhs = ScriptObject.AsString(Evaluate(context, node._child(1), false));
}
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1; return(null);
}
if (lhs == null)
{
result = null;
}
else if (lhs is ScriptObject)
{
result = (lhs as ScriptObject).GetProperty(ScriptObject.AsString(rhs));
if (node.gsp("@token") == ":")
{
context.Scope.PushVariable("this", lhs);
result = Evaluate(context, result, true, false);
context.Scope.PopVariable("this");
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1; return(null);
}
}
}
else
{
var field = lhs.GetType().GetField(ScriptObject.AsString(rhs));
if (field != null)
{
result = field.GetValue(lhs);
}
else
{
var prop = lhs.GetType().GetProperty(ScriptObject.AsString(rhs));
if (prop != null)
{
result = prop.GetValue(lhs, null);
}
else
{
var members = lhs.GetType().FindMembers(System.Reflection.MemberTypes.Method,
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance,
new System.Reflection.MemberFilter((minfo, obj) => { return(minfo.Name == obj.ToString()); }),
ScriptObject.AsString(rhs));
if (members.Length != 0)
{
result = new GenericScriptObject(
"@lazy-reflection", ScriptObject.AsString(rhs),
"@source-object", lhs,
"@source-type", lhs.GetType());
}
else
{
result = null;
}
}
}
}
}
else if (type == "node")
{
if (!ignoreStar && node.gsp("@prefix") == "*")
{
result = node;
}
else
{
bool eval = node.gsp("@prefix") != "^";
var arguments = new ScriptList();
foreach (var child in node._children)
{
evaluateNodeChild(eval, child, arguments, context);
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
if (node.gsp("@prefix") == "^")
{
result = arguments;
}
else
{
if (arguments.Count > 0 && Function.IsFunction(arguments[0] as ScriptObject))
{
result = Function.Invoke((arguments[0] as ScriptObject), this, context,
new ScriptList(arguments.GetRange(1, arguments.Count - 1)));
if (context.evaluationState != EvaluationState.Normal)
{
if (context.evaluationState == EvaluationState.UnwindingError)
{
context.PushStackTrace((arguments[0] as ScriptObject).gsp("@name"));
}
context.callDepth -= 1;
return(null);
}
}
else if (arguments.Count > 0 &&
arguments[0] is ScriptObject &&
(arguments[0] as ScriptObject).GetProperty("@lazy-reflection") != null)
{
var sObj = arguments[0] as ScriptObject;
var argumentTypes = arguments.GetRange(1, arguments.Count - 1).Select(
(obj) => obj.GetType()).ToArray();
var sourceObject = sObj.GetProperty("@source-object");
var method = (sObj.GetProperty("@source-type") as System.Type)
.GetMethod(sObj.gsp("@lazy-reflection"), argumentTypes);
if (method == null)
{
throw new ScriptError("Could not find overload for " +
sObj.gsp("@lazy-reflection") + " that takes argument types " +
String.Join(", ", argumentTypes.Select((t) => t.Name)) + " on type " +
sObj.GetProperty("@source-type").ToString(), what as ScriptObject);
}
result = method.Invoke(sourceObject, arguments.GetRange(1, arguments.Count - 1).ToArray());
}
else if (arguments.Count > 0)
{
result = arguments[0];
}
else
{
result = null;
}
}
}
}
else if (type == "root")
{
var results = new ScriptList();
foreach (var child in node._children)
{
results.Add(Evaluate(context, child, false, false));
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1;
return(null);
}
}
return(results);
}
else if (type == "number")
{
try
{
if (node.gsp("@token").Contains('.'))
{
result = Convert.ToSingle(node.gsp("@token"));
}
else
{
var numberString = node.gsp("@token");
if (numberString.StartsWith("0x"))
{
result = Convert.ToInt32(numberString.Substring(2), 16);
}
else if (numberString.StartsWith("0b"))
{
var accumulator = 0;
foreach (var c in numberString.Substring(2))
{
accumulator <<= 1;
if (c == '1')
{
accumulator += 1;
}
}
result = accumulator;
}
else
{
result = Int32.Parse(numberString);
}
}
}
catch (Exception e)
{
context.RaiseNewError("Number format error.", node);
{ context.callDepth -= 1; return(null); }
}
}
else if (type == "char")
{
context.callDepth -= 1;
return(node.gsp("@token")[0]);
}
else
{
context.RaiseNewError("Internal evaluator error.", node);
{ context.callDepth -= 1; return(null); }
}
if (node.gsp("@prefix") == ":" && !ignoreStar)
{
result = Evaluate(context, result);
}
if (context.evaluationState != EvaluationState.Normal)
{
context.callDepth -= 1; return(null);
}
;
if (node.gsp("@prefix") == ".")
{
result = LookupToken(context, ScriptObject.AsString(result));
}
context.callDepth -= 1;
return(result);
}
private void SetupObjectFunctions()
{
AddFunction("members", "Lists all members of an object",
(context, arguments) =>
{
var obj = ArgumentType <ScriptObject>(arguments[0]);
return(obj.ListProperties());
},
Arguments.Arg("object"));
AddFunction("record", "Create a new record.",
(context, arguments) =>
{
var obj = new GenericScriptObject();
var vars = AutoBind.ListArgument(arguments[0]);
foreach (var item in vars)
{
var l = ArgumentType <ScriptObject>(item);
if (l == null || l._children.Count != 2)
{
throw new ScriptError("Record expects a list of pairs.", null);
}
var arg = l._child(0) as ScriptObject;
string mname = "";
if (arg != null && arg.gsp("@type") == "token")
{
mname = arg.gsp("@token");
}
else
{
mname = Evaluate(context, arg, true).ToString();
}
obj.SetProperty(mname, Evaluate(context, l._child(1)));
}
return(obj);
},
Arguments.Repeat(Arguments.Lazy("pairs")));
AddFunction("clone", "Clone a record.",
(context, arguments) =>
{
var r = new GenericScriptObject(arguments[0] as ScriptObject);
foreach (var item in arguments[1] as ScriptList)
{
var list = item as ScriptList;
if (list == null || list.Count != 2)
{
throw new ScriptError("Record expects only pairs as arguments.", context.currentNode);
}
r[ScriptObject.AsString(list[0])] = list[1];
}
return(r);
},
Arguments.Arg("object"),
Arguments.Mutator(Arguments.Repeat(Arguments.Optional("pairs")), "(@list value)"));
AddFunction("set", "Set a member on an object.",
(context, arguments) =>
{
if (arguments[0] == null)
{
return(arguments[2]);
}
return(SetObjectProperty(context, arguments[0], ScriptObject.AsString(arguments[1]), arguments[2]));
},
Arguments.Arg("object"),
Arguments.Mutator(Arguments.Lazy("name"), "(@identifier-if-token value)"),
Arguments.Arg("value"));
AddFunction("multi-set", "Set multiple members of an object.",
(context, arguments) =>
{
var obj = ArgumentType <ScriptObject>(arguments[0]);
var vars = AutoBind.ListArgument(arguments[1]);
foreach (var item in vars)
{
var l = ArgumentType <ScriptObject>(item);
if (l == null || l._children.Count != 2)
{
throw new ScriptError("Multi-set expects a list of pairs.", null);
}
var arg = l._child(0) as ScriptObject;
string mname = "";
if (arg != null && arg.gsp("@type") == "token")
{
mname = arg.gsp("@token");
}
else
{
mname = Evaluate(context, arg, true).ToString();
}
SetObjectProperty(context, obj, mname, Evaluate(context, l._child(1)));
}
return(obj);
},
Arguments.Arg("object"),
Arguments.Repeat(Arguments.Lazy("pairs")));
AddFunction("delete", "Deletes a property from an object.",
(context, arguments) =>
{
var value = (arguments[0] as ScriptObject)[ScriptObject.AsString(arguments[1])];
if (arguments[0] is Scope)
{
(arguments[0] as Scope).PopVariable(ScriptObject.AsString(arguments[1]));
}
else
{
(arguments[0] as ScriptObject).DeleteProperty(ScriptObject.AsString(arguments[1]));
}
return(value);
},
Arguments.Arg("object"),
Arguments.Arg("property-name"));
}
