private void SetupMathFunctions()
{
AddFunction("tochar", "Convert an integer to a character", (context, arguments) =>
{
return((char)AutoBind.IntArgument(arguments[0]));
}, Arguments.Arg("value"));
AddFunction("toint", "Convert a char to an integet", (context, arguments) =>
{
return((int)AutoBind.CharArgument(arguments[0]));
}, Arguments.Arg("value"));
AddFunction("round", "Round a value", (context, arguments) =>
{
if (arguments[0] is Int32)
{
return(arguments[0]);
}
if (arguments[0] is Single)
{
return((int)(Math.Round((arguments[0] as Single?).Value)));
}
return(0);
},
Arguments.Arg("value"));
AddFunction("floor", "", (context, arguments) =>
{
if (arguments[0] is Int32)
{
return(arguments[0]);
}
if (arguments[0] is Single)
{
return((int)(Math.Floor((arguments[0] as Single?).Value)));
}
return(0);
},
Arguments.Arg("value"));
AddFunction("+", "Add values", (context, arguments) =>
{
var values = AutoBind.ListArgument(arguments[0]);
if (values.Count == 0)
{
return(0);
}
if (values.Count == 1)
{
return(values[0]);
}
var result = (dynamic)values[0];
for (int i = 1; i < values.Count; ++i)
{
result += (dynamic)values[i];
}
return(result);
},
Arguments.Repeat("value"));
AddFunction("-", "Subtract values", (context, arguments) =>
{
if (arguments[0] == null || arguments[1] == null)
{
return(null);
}
return((dynamic)arguments[0] - (dynamic)arguments[1]);
},
Arguments.Arg("A"),
Arguments.Arg("B"));
AddFunction("*", "Add values", (context, arguments) =>
{
var values = AutoBind.ListArgument(arguments[0]);
if (values.Count == 0)
{
return(0);
}
if (values.Count == 1)
{
return(values[0]);
}
var result = (dynamic)values[0];
for (int i = 1; i < values.Count; ++i)
{
result *= (dynamic)values[i];
}
return(result);
},
Arguments.Repeat("value"));
AddFunction("/", "Divide values", (context, arguments) =>
{
if (arguments[0] == null || arguments[1] == null)
{
return(null);
}
return((dynamic)arguments[0] / (dynamic)arguments[1]);
},
Arguments.Arg("A"),
Arguments.Arg("B"));
AddFunction("%", "Modulus values", (context, arguments) =>
{
if (arguments[0] == null || arguments[1] == null)
{
return(null);
}
return((dynamic)arguments[0] % (dynamic)arguments[1]);
},
Arguments.Arg("A"),
Arguments.Arg("B"));
//functions.Add("random", Function.MakeSystemFunction("random",
// Arguments.ParseArguments(this, "integer A", "integer B"),
// "A B : return a random value in range (A,B).",
// (context, arguments) =>
// {
// var first = arguments[0] as int?;
// var second = arguments[1] as int?;
// if (first == null || second == null || !first.HasValue || !second.HasValue) return null;
// return random.Next(first.Value, second.Value);
// }));
}
private void SetupLoopFunctions()
{
AddFunction("map", "variable_name list code : Transform one list into another",
(context, arguments) =>
{
var vName = ArgumentType <String>(arguments[0]);
var list = ArgumentType <System.Collections.IEnumerable>(arguments[1]);
var code = ArgumentType <ScriptObject>(arguments[2]);
var result = new ScriptList();
context.Scope.PushVariable(vName, null);
foreach (var item in list)
{
context.Scope.ChangeVariable(vName, item);
result.Add(Evaluate(context, code, true));
if (context.evaluationState == EvaluationState.UnwindingBreak)
{
context.Scope.PopVariable(vName);
return(context.UnBreak());
}
}
context.Scope.PopVariable(vName);
return(result);
},
Arguments.Mutator(Arguments.Lazy("variable-name"), "(@identifier value)"),
Arguments.Arg("in"),
Arguments.Lazy("code"));
AddFunction("mapi", "Like map, except the variable will hold the index.",
(context, arguments) =>
{
var vName = ArgumentType <String>(arguments[0]);
var from = AutoBind.IntArgument(arguments[1]);
var to = AutoBind.IntArgument(arguments[2]);
var code = ArgumentType <ScriptObject>(arguments[3]);
var result = new ScriptList();
context.Scope.PushVariable(vName, null);
for (int i = from; i < to; ++i)
{
context.Scope.ChangeVariable(vName, i);
result.Add(Evaluate(context, code, true));
if (context.evaluationState == EvaluationState.UnwindingBreak)
{
context.Scope.PopVariable(vName);
return(context.UnBreak());
}
}
context.Scope.PopVariable(vName);
return(result);
},
Arguments.Mutator(Arguments.Lazy("variable-name"), "(@identifier value)"),
Arguments.Arg("from"),
Arguments.Arg("to"),
Arguments.Lazy("code"));
AddFunction("mapex",
"variable_name start code next : Like map, but the next element is the result of 'next'. Stops when next = null.",
(context, arguments) =>
{
var vName = ArgumentType <String>(arguments[0]);
var code = ArgumentType <ScriptObject>(arguments[2]);
var next = ArgumentType <ScriptObject>(arguments[3]);
var result = new ScriptList();
var item = arguments[1];
context.Scope.PushVariable(vName, null);
while (item != null)
{
context.Scope.ChangeVariable(vName, item);
result.Add(Evaluate(context, code, true));
if (context.evaluationState == EvaluationState.UnwindingBreak)
{
context.Scope.PopVariable(vName);
return(context.UnBreak());
}
item = Evaluate(context, next, true);
}
context.Scope.PopVariable(vName);
return(result);
},
Arguments.Mutator(Arguments.Lazy("variable-name"), "(@identifier value)"),
Arguments.Arg("start"),
Arguments.Lazy("code"),
Arguments.Lazy("next"));
AddFunction("for",
"variable_name list code : Execute code for each item in list. Returns result of last run of code.",
(context, arguments) =>
{
var vName = ArgumentType <String>(arguments[0]);
var list = ArgumentType <System.Collections.IEnumerable>(arguments[1]);
var func = ArgumentType <ScriptObject>(arguments[2]);
context.Scope.PushVariable(vName, null);
Object result = null;
foreach (var item in list)
{
context.Scope.ChangeVariable(vName, item);
result = Evaluate(context, func, true);
if (context.evaluationState == EvaluationState.UnwindingBreak)
{
context.Scope.PopVariable(vName);
return(context.UnBreak());
}
}
context.Scope.PopVariable(vName);
return(result);
},
Arguments.Mutator(Arguments.Lazy("variable-name"), "(@identifier value)"),
Arguments.Arg("list"),
Arguments.Lazy("code"));
AddFunction("fori",
"variable_name list code : Execute code for each item in list. Returns result of last run of code.",
(context, arguments) =>
{
var vName = ArgumentType <String>(arguments[0]);
var from = AutoBind.IntArgument(arguments[1]);
var to = AutoBind.IntArgument(arguments[2]);
var func = ArgumentType <ScriptObject>(arguments[3]);
context.Scope.PushVariable(vName, null);
Object result = null;
for (int i = from; i < to; ++i)
{
context.Scope.ChangeVariable(vName, i);
result = Evaluate(context, func, true);
if (context.evaluationState == EvaluationState.UnwindingError)
{
return(result);
}
else if (context.evaluationState == EvaluationState.UnwindingBreak)
{
context.Scope.PopVariable(vName);
return(context.UnBreak());
}
}
context.Scope.PopVariable(vName);
return(result);
},
Arguments.Mutator(Arguments.Lazy("variable-name"), "(@identifier value)"),
Arguments.Arg("from"),
Arguments.Arg("to"),
Arguments.Lazy("code"));
AddFunction("while",
"condition code : Repeat code while condition evaluates to true.",
(context, arguments) =>
{
var cond = ArgumentType <ScriptObject>(arguments[0]);
var code = ArgumentType <ScriptObject>(arguments[1]);
while (context.evaluationState == EvaluationState.Normal && Evaluate(context, cond, true) != null)
{
if (context.evaluationState == EvaluationState.Normal)
{
Evaluate(context, code, true);
}
}
if (context.evaluationState == EvaluationState.UnwindingBreak)
{
return(context.UnBreak());
}
return(null);
},
Arguments.Lazy("condition"),
Arguments.Lazy("code"));
}
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")));
}