protected override Parser.Result Evaluate(string data, ref int from)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(data, ref from, Constants.NEXT_ARG_ARRAY);
if (from >= data.Length)
{
throw new ArgumentException("Couldn't append variable");
}
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Parser.Result currentValue = func.GetValue(data, ref from);
// 3. Get the value to be looked for.
Parser.Result searchValue = Utils.GetItem(data, ref from);
// 4. Take either the string part if it is defined,
// or the numerical part converted to a string otherwise.
string basePart = currentValue.String != null ? currentValue.String :
currentValue.Value.ToString();
string search = searchValue.String != null ? searchValue.String :
searchValue.Value.ToString();
int result = basePart.IndexOf(search);
return(new Parser.Result(result, null));
}
protected override Parser.Result Evaluate(string data, ref int from)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(data, ref from, Constants.END_ARG_ARRAY);
if (from >= data.Length)
{
throw new ArgumentException("Couldn't get variable");
}
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Parser.Result currentValue = func.GetValue(data, ref from);
// 3. Take either the length of the underlying tuple or
// string part if it is defined,
// or the numerical part converted to a string otherwise.
int size = currentValue.Tuple != null ? currentValue.Tuple.Count :
currentValue.String != null ? currentValue.String.Length :
currentValue.Value.ToString().Length;
Parser.Result newValue = new Parser.Result(size);
return(newValue);
}
protected override Parser.Result Evaluate(string data, ref int from)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(data, ref from, Constants.NEXT_ARG_ARRAY);
if (from >= data.Length)
{
throw new ArgumentException("Couldn't append variable");
}
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Parser.Result currentValue = func.GetValue(data, ref from);
// 3. Get the value to be added or appended.
Parser.Result newValue = Utils.GetItem(data, ref from);
// 4. Take either the string part if it is defined,
// or the numerical part converted to a string otherwise.
string arg1 = currentValue.String != null ? currentValue.String :
currentValue.Value.ToString();
string arg2 = newValue.String != null ? newValue.String :
newValue.Value.ToString();
// 5. The variable becomes a string after adding a string to it.
newValue.Reset();
newValue.String = arg1 + arg2;
ParserFunction.AddFunction(varName, new GetVarFunction(newValue));
return(newValue);
}
protected override Parser.Result Evaluate(string data, ref int from)
{
string substring;
// 1. Get the name of the variable.
string varName = Utils.GetToken(data, ref from, Constants.NEXT_ARG_ARRAY);
if (from >= data.Length)
{
throw new ArgumentException("Couldn't get variable");
}
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Parser.Result currentValue = func.GetValue(data, ref from);
// 3. Take either the string part if it is defined,
// or the numerical part converted to a string otherwise.
string arg = currentValue.String != null ? currentValue.String :
currentValue.Value.ToString();
// 4. Get the initial index of the substring.
bool lengthAvailable = Utils.SeparatorExists(data, from);
Parser.Result init = Utils.GetItem(data, ref from, true /* expectInt */);
// 5. Get the length of the substring if available.
if (lengthAvailable)
{
Parser.Result length = Utils.GetItem(data, ref from, true /* expectInt */);
if (init.Value + length.Value > arg.Length)
{
throw new ArgumentException("The total substring length is larger than [" +
arg + "]");
}
substring = arg.Substring((int)init.Value, (int)length.Value);
}
else
{
substring = arg.Substring((int)init.Value);
}
Parser.Result newValue = new Parser.Result(Double.NaN, substring);
return(newValue);
}
protected override Parser.Result Evaluate(string data, ref int from)
{
string varName = Utils.GetToken(data, ref from, Constants.NEXT_ARG_ARRAY);
if (from >= data.Length)
{
throw new ArgumentException("Couldn't set variable before end of line");
}
Parser.Result varValue = Utils.GetItem(data, ref from);
// Check if the variable to be set has the form of x(0),
// meaning that this is an array element.
int arrayIndex = Utils.ExtractArrayElement(ref varName);
if (arrayIndex >= 0)
{
bool exists = ParserFunction.FunctionExists(varName);
Parser.Result currentValue = exists ?
ParserFunction.GetFunction(varName).GetValue(data, ref from) :
new Parser.Result();
List <Parser.Result> tuple = currentValue.Tuple == null ?
new List <Parser.Result>() :
currentValue.Tuple;
if (tuple.Count > arrayIndex)
{
tuple[arrayIndex] = varValue;
}
else
{
for (int i = tuple.Count; i < arrayIndex; i++)
{
tuple.Add(new Parser.Result(Double.NaN, string.Empty));
}
tuple.Add(varValue);
}
varValue = new Parser.Result(Double.NaN, null, tuple);
}
ParserFunction.AddFunction(varName, new GetVarFunction(varValue));
return(new Parser.Result(Double.NaN, varName));
}
public void AddTranslation(NameValueCollection languageDictionary, string originalName)
{
string translation = languageDictionary[originalName];
if (string.IsNullOrWhiteSpace(translation))
{ // The translation is not provided for this function.
return;
}
if (translation.IndexOfAny((" \t\r\n").ToCharArray()) >= 0)
{
throw new ArgumentException("Translation of [" + translation + "] contains white spaces");
}
ParserFunction originalFunction = ParserFunction.GetFunction(originalName);
ParserFunction.AddFunction(translation, originalFunction);
}
