private static bool evaluate_subexpr(String expression, DBTrade db)
{
String lefttitle = "";
String leftfield = "";
String righttitle = "";
String rightfield = "";
String command = "";
double[] parms = new double[10];
NumberFormatInfo ni = (NumberFormatInfo)CultureInfo.InstalledUICulture.NumberFormat.Clone();
ni.NumberDecimalSeparator = ".";
expression = expression.Trim();
if (expression.Contains('='))
{
leftfield = expression.Substring(0, expression.IndexOf('=')).Trim();
// per farlo bene, x.(__) x รจ un nome di titolo?
if (leftfield.Contains('.'))
{
lefttitle = leftfield.Substring(0, leftfield.IndexOf('.'));
leftfield = leftfield.Substring(leftfield.IndexOf('.') + 1);
}
expression = expression.Substring(expression.IndexOf('=') + 1).Trim();
}
// lefttitle e leftfield apposto.
expression = expression.Replace(")", "");
if (!expression.Contains('('))
{
return(false);
}
command = expression.Substring(0, expression.IndexOf('('));
expression = expression.Substring(expression.IndexOf('(') + 1);
String[] otherparms = expression.Trim().Split(',');
if (!otherparms[0].Contains('.'))
{
return(false);
}
righttitle = otherparms[0].Substring(0, otherparms[0].IndexOf('.'));
rightfield = otherparms[0].Substring(otherparms[0].IndexOf('.') + 1);
for (int j = 1; j < otherparms.Length; j++)
{
try { parms[j - 1] = Double.Parse(otherparms[j], ni); }
catch (FormatException) { return(false); }
}
if (lefttitle.Equals("")) // if not specified left title
{
lefttitle = righttitle;
}
// now left* right*, command, parms are ok
// MessageBox.Show(lefttitle + "." + leftfield + " = "+command+"(" + righttitle + "." + rightfield+")");
DBTitle srcTitle = db.getByName(righttitle);
DBTitle dstTitle = db.getByName(lefttitle);
if (srcTitle == null || dstTitle == null)
{
return(false);
}
double[] srcSerie = srcTitle.GetSerieByName(rightfield);
if (srcSerie == null)
{
return(false);
}
double[] result = null;
if (command.Equals("const"))
{
result = TI.calculate_const(srcSerie.Length, parms[0]);
}
else if (command.Equals("mm"))
{
result = TI.calculate_mm(srcSerie, (int)parms[0]);
}
else if (command.Equals("emm"))
{
result = TI.calculate_emm(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("d") || command.Equals("d-"))
{
result = TI.calculate_d(srcSerie, (int)parms[0]);
}
else if (command.Equals("d%") || command.Equals("d-%") || command.Equals("dperc") || command.Equals("d-perc"))
{
result = TI.calculate_dperc(srcSerie, (int)parms[0]);
}
else if (command.Equals("d2") || command.Equals("d2-"))
{
result = TI.calculate_d2(srcSerie, (int)parms[0]);
}
else if (command.Equals("sigma"))
{
result = TI.calculate_sigma(srcSerie, (int)parms[0]);
}
else if (command.Equals("esigma"))
{
result = TI.calculate_esigma(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("BBhigh"))
{
result = TI.calculate_BBhigh(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("BBlow"))
{
result = TI.calculate_BBlow(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("BBWp"))
{
result = TI.calculate_BBWp(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("BBBp"))
{
result = TI.calculate_BBBp(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("range"))
{
result = TI.calculate_range(srcSerie, (int)parms[0]);
}
else if (command.Equals("stochK"))
{
result = TI.calculate_stochasticK(srcSerie, (int)parms[0], parms[1]);
}
else if (command.Equals("RSIC"))
{
result = TI.calculate_RSIC(srcSerie, (int)parms[0]);
}
else if (command.Equals("RSIV"))
{
result = TI.calculate_RSIV(srcSerie, (int)parms[0]);
}
else if (command.Equals("rand"))
{
result = TI.calculate_rand(srcSerie, parms[0], parms[1]);
}
if (result != null)
{
dstTitle.AddSerie(leftfield, result);
return(true);
}
else
{
return(false);
}
}