/// <summary>
///
/// </summary>
/// <param name="parent"></param>
/// <param name="res"></param>
/// <param name="index"></param>
/// <returns>the index of the end of the sequence</returns>
private int CompileSequence(CalculatorToken parent, out CalculatorToken res, int index)
{
int end = -1;
res = null;
for (int i = index; i < _calculatorTokens.Count; i++)
{
var token = _calculatorTokens[i] as CalculatorTokenSequence;
var seq = token;
if (seq != null
&& seq.Sequence != CalculatorTokenSequence.TokenSequence.StartSequence)
{
continue;
}
end = CompileCalculatorToken(out res, i + 1) + 1;
_calculatorTokens.RemoveRange(i, end - i);
return i;
}
return end;
}
/// <summary>
///
/// </summary>
/// <param name="token"></param>
/// <param name="index"></param>
/// <returns></returns>
private int CompileCalculatorToken(out CalculatorToken token, int index)
{
token = _calculatorTokens[index];
if (token is CalculatorTokenBinaryOperator)
{
index = CompileBinaryOperator(token as CalculatorTokenBinaryOperator, index + 1);
}
else if (token is CalculatorTokenSequence)
{
CalculatorToken res;
index = CompileSequence(token as CalculatorTokenSequence, out res, index + 1);
token = res;
}
return index;
}
/// <summary>
///
/// </summary>
/// <param name="token"></param>
internal void AddCalculator(CalculatorToken token)
{
_calculatorTokens.Add(token);
}
/// <summary>
///
/// </summary>
/// <param name="br"></param>
/// <param name="option"></param>
public override void Load(BinaryReader br, SaveOption option)
{
_operator = (BinaryOperator)br.ReadInt32();
_left = Calculator.CreateCalculatorToken(Calculator, br, option);
_right = Calculator.CreateCalculatorToken(Calculator, br, option);
}
/// <summary>
///
/// </summary>
/// <param name="el"></param>
/// <param name="option"></param>
public override void Load(XmlNode el, SaveOption option)
{
_operator = (BinaryOperator) int.Parse(el.Attributes["operator"].Value);
XmlNode child = (XmlNode)el.SelectSingleNode("Left/Node");
_left = Calculator.CreateCalculatorToken(Calculator, child, option);
child = (XmlNode)el.SelectSingleNode("Right/Node");
_right = Calculator.CreateCalculatorToken(Calculator, child, option);
}
/// <summary>
///
/// </summary>
/// <param name="el"></param>
/// <param name="option"></param>
public void Load(XmlNode el, SaveOption option)
{
_root = null;
XmlNode root = el.SelectSingleNode("Root/Node");
if (root != null)
{
_root = CreateCalculatorToken(this, root, option);
}
}