public void Add_Remove_Value_Fail()
{
ExpressionParser parser = new ExpressionParser();
parser.Values.Add("x", 5);
// This parses the expression and the values
// will be cached in the expression tree
double value = parser.Parse("x+x+x");
Assert.AreEqual(15, value);
// Remove value
parser.Values.Remove("x");
bool exception = false;
try
{
value = parser.Parse("x+x+x");
}
catch(Exception ex)
{
exception = true;
}
if (!exception) Assert.Fail();
}
public void AllCultures_Correct_DecimalSeparator_Success()
{
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.AllCultures);
ExpressionParser parser = new ExpressionParser();
foreach(var culture in cultures)
{
string decimalSeparator = culture.NumberFormat.NumberDecimalSeparator;
try
{
parser.Culture = culture;
}
catch (ArgumentOutOfRangeException)
{
// If unsupported decimal or group separator, see documentation
continue;
}
Assert.AreEqual(
4300.40,
parser.Parse(String.Format(culture, "3300{0}3+2100{0}2-1100{0}1", decimalSeparator)),
"Failed, Culture " + culture.Name
);
}
}
public void Serialize_Deserialize_Evaluate_38()
{
ExpressionParser parser = new ExpressionParser();
string func = "x+y+z";
double expected = 38;
// Values
parser.Values.Add("x", 5);
parser.Values.Add("y", 10);
parser.Values.Add("z", 23);
// Parse
double value = parser.Parse(func);
Assert.AreEqual(expected, value);
// Get expression
Expression expression = parser.Expressions[func];
MemoryStream stream = new MemoryStream();
// Serialize
expression.Save(stream);
stream.Flush();
stream.Position = 0;
// Deserialize
expression = new Expression();
expression.Load(stream);
value = parser.EvalExpression(expression);
Assert.AreEqual(expected, value);
}
static private string CheckAndAddRef(string Expression, info.lundin.math.ExpressionParser parser, Widget widget)
{
string expression = Expression;
/*replace to values*/
///add this. values pos
expression = expression.Replace("this.X", $"{widget.Left}");
expression = expression.Replace("this.Y", $"{widget.Top}");
expression = expression.Replace("this.l", $"{widget.Left}");
expression = expression.Replace("this.t", $"{widget.Top}");
expression = expression.Replace("this.left", $"{widget.Left}");
expression = expression.Replace("this.top", $"{widget.Top}");
///add this.size
expression = expression.Replace("this.w", $"{widget.Width ?? 0}");
expression = expression.Replace("this.h", $"{widget.Height ?? 0}");
expression = expression.Replace("this.width", $"{widget.Width ?? 0}");
expression = expression.Replace("this.height", $"{widget.Height ?? 0}");
if (widget.Parent != null)
{
///add parent values pos
expression = expression.Replace("&.X", GerParrentValue(widget, "&.X"));
expression = expression.Replace("&.Y", GerParrentValue(widget, "&.Y"));
expression = expression.Replace("&.l", GerParrentValue(widget, "&.X"));
expression = expression.Replace("&.t", GerParrentValue(widget, "&.Y"));
expression = expression.Replace("&.left", GerParrentValue(widget, "&.X"));
expression = expression.Replace("&.top", GerParrentValue(widget, "&.Y"));
///add parent values size
expression = expression.Replace("&.w", GerParrentValue(widget, "&.w"));
expression = expression.Replace("&.h", GerParrentValue(widget, "&.h"));
expression = expression.Replace("&.width", GerParrentValue(widget, "&.w"));
expression = expression.Replace("&.height", GerParrentValue(widget, "&.h"));
}
///add window walues
expression = expression.Replace("W.h", $"{MyraEnvironment.Game.Window.ClientBounds.Height}");
expression = expression.Replace("W.height", $"{MyraEnvironment.Game.Window.ClientBounds.Height}");
expression = expression.Replace("W.w", $"{MyraEnvironment.Game.Window.ClientBounds.Width}");
expression = expression.Replace("W.width", $"{MyraEnvironment.Game.Window.ClientBounds.Width}");
///
if (expression.Contains("["))
{
Regex regex = new Regex(@"\[.+].\w*");
MatchCollection matches = regex.Matches(expression);
foreach (var item in matches)
{
string Id = item.ToString().Split('[')[1].ToString().Split(']')[0].ToString();
var w = GetByID(Id, _widgets);
var valueForReg = GetValue(item.ToString().Substring(item.ToString().IndexOf(']') + 1, 1), w.Bounds);
expression = expression.Replace(item as string, $"{valueForReg ?? 0}");
}
}
return(expression);
}
public void Parse_EmptyOrNUllExpression_Fail()
{
bool exception = false;
var parser = new ExpressionParser();
try
{
parser.Parse("");
}
catch (ParserException)
{
exception = true;
}
if (!exception) Assert.Fail("Null expression was allowed");
}
public static void Parse(Widget widget, List <Widget> widgets, int level = 0)
{
_widgets = widgets;
#region Check
///check on depths
if (level > DepthOfCalculations)
{
return;
}
///check parent on dynamic layout
if (widget.Parent != null && !widget.Parent.Layout2d.Nullable)
{
Parse(widget.Parent, widgets, ++level);
}
#endregion
///expresion parser
info.lundin.math.ExpressionParser parser = new info.lundin.math.ExpressionParser();
parser.ImplicitMultiplication = false;
#region Calculation
/// if X exp not null
if (widget.Layout2d.PositionXExpression != "NULL")
{
widget.Left = (int)parser.Parse(CheckAndAddRef(widget.Layout2d.PositionXExpression, parser, widget));
}
/// if Y exp not null
if (widget.Layout2d.PositionYExpression != "NULL")
{
widget.Top = (int)parser.Parse(CheckAndAddRef(widget.Layout2d.PositionYExpression, parser, widget));
}
/// if H exp not null
if (widget.Layout2d.SizeYExpression != "NULL")
{
widget.Height = (int)parser.Parse(CheckAndAddRef(widget.Layout2d.SizeYExpression, parser, widget));
}
/// if W exp not null
if (widget.Layout2d.SizeXExpression != "NULL")
{
widget.Width = (int)parser.Parse(CheckAndAddRef(widget.Layout2d.SizeXExpression, parser, widget));
}
#endregion
widget.Layout2d.Calculated = true;
}
public void Parse_MissingParentheses_Fail()
{
bool exception = false;
var parser = new ExpressionParser()
{
RequireParentheses = true
};
try
{
parser.Parse("cos5");
}
catch (ParserException)
{
exception = true;
}
if (!exception) Assert.Fail("Missing parentheses was wrongly allowed");
}
public void Add_Remove_Add_Value_Success()
{
ExpressionParser parser = new ExpressionParser();
parser.Values.Add("x", 5);
// This parses the expression and the values
// will be cached in the expression tree
double value = parser.Parse("x+x+x");
Assert.AreEqual(15, value);
// Remove value
parser.Values.Remove("x");
// Add value with same variable
parser.Values.Add("x", 10);
value = parser.Parse("x+x+x");
Assert.AreEqual(30, value);
}
public void AllCultures_Correct_GroupAndDecimalSeparator_Success()
{
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.AllCultures);
ExpressionParser parser = new ExpressionParser();
foreach (var culture in cultures)
{
string separator = culture.NumberFormat.CurrencyGroupSeparator;
string decimalSeparator = culture.NumberFormat.NumberDecimalSeparator;
// At least one culture uses / for decimal separator, this is not allowed
// and documented as not allowed.
if (decimalSeparator == "/") continue;
// At least one culture uses the same grouping and decimal separator,
// this is NotFiniteNumberException allowed and documented
if (separator == decimalSeparator) continue;
try
{
parser.Culture = culture;
}
catch (ArgumentOutOfRangeException)
{
// If unsupported decimal or group separator, see documentation
continue;
}
Assert.AreEqual(
2469134.46,
parser.Parse(String.Format(culture, "1{0}234{0}567{1}23+1{0}234{0}567{1}23", separator, decimalSeparator)),
"Failed, Culture " + culture.EnglishName
);
}
}
public void AllCultures_Correct_GroupSeparator_Success()
{
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.AllCultures);
ExpressionParser parser = new ExpressionParser();
foreach (var culture in cultures)
{
string separator = culture.NumberFormat.CurrencyGroupSeparator;
try
{
parser.Culture = culture;
}
catch (ArgumentOutOfRangeException)
{
// If unsupported decimal or group separator, see documentation
continue;
}
Assert.AreEqual(
2469134,
parser.Parse(String.Format(culture, "1{0}234{0}567+1{0}234{0}567", separator)),
"Failed, Culture " + culture.EnglishName
);
}
}
public void Initialize()
{
parser = new ExpressionParser();
}
public void Parse_MissingVariables_Fail()
{
bool exception = false;
var parser = new ExpressionParser();
try
{
parser.Parse("x+y");
}
catch (ParserException)
{
exception = true;
}
if (!exception) Assert.Fail("Missing variables in table wrongly allowed");
}
public void Change_Value_Success()
{
ExpressionParser parser = new ExpressionParser();
parser.Values.Add("x", 5);
// This parses the expression and the values
// will be cached in the expression tree
double value = parser.Parse("x+x+x");
Assert.AreEqual(15, value);
// Change value
parser.Values["x"].SetValue(10);
value = parser.Parse("x+x+x");
Assert.AreEqual(30, value);
}
public void Parse_UnbalancedParentheses_Fail()
{
bool exception = false;
var parser = new ExpressionParser()
{
RequireParentheses = true
};
try
{
parser.Parse("cos(5)+x-sin(pi");
}
catch (ParserException)
{
exception = true;
}
if (!exception) Assert.Fail("Unbalanced parentheses wrongly allowed");
}
public List<Pointd> Calcular(string function, double X0, double XF, double Y0, int N)
{
var h = (XF - X0) / N;
var k1 = 0.0;
var k2 = 0.0;
var k3 = 0.0;
var k4 = 0.0;
List<Pointd> list = new List<Pointd>();
list.Add(new Pointd(X0, Y0));
try
{
for (int i = 1; i <= N; i++)
{
var exp = new ExpressionParser();
exp.Values.Add("x", X0);
exp.Values.Add("t", X0);
exp.Values.Add("y", Y0);
k1 = exp.Parse(function);
var exp2 = new ExpressionParser();
exp2.Values.Add("x", X0 + (h / 2));
exp2.Values.Add("t", X0 + (h / 2));
exp2.Values.Add("y", Y0 + (h * (k1 / 2)));
k2 = exp2.Parse(function);
var exp3 = new ExpressionParser();
exp3.Values.Add("x", X0 + (h / 2));
exp3.Values.Add("t", X0 + (h / 2));
exp3.Values.Add("y", Y0 + (h * (k2 / 2)));
k3 = exp3.Parse(function);
var exp4 = new ExpressionParser();
exp4.Values.Add("x", X0 + (h));
exp4.Values.Add("t", X0 + (h));
exp4.Values.Add("y", Y0 + (h * (k3)));
k4 = exp4.Parse(function);
Y0 = Y0 + ((h / 6) * (k1 + (2 * k2) + (2 * k3) + k4));
X0 = X0 + h;
list.Add(new Pointd(X0, Y0));
}
return list;
}
catch (Exception)
{
return null;
}
}
public void Initialize()
{
parser = new ExpressionParser();
currencyDecimalSeparator = CultureInfo.InvariantCulture.NumberFormat.CurrencyDecimalSeparator;
delta = 1.22460635382238E-16;
}
public void CurrentCulture_Parse_Success()
{
CultureInfo culture = System.Threading.Thread.CurrentThread.CurrentCulture;
ExpressionParser parser = new ExpressionParser();
parser.Culture = culture;
string decimalSeparator = culture.NumberFormat.NumberDecimalSeparator;
Assert.AreEqual(3, parser.Parse(String.Format("round(3{0}3)", decimalSeparator)));
}
private void button1_Click(object sender, EventArgs e)
{
ExpressionParser oParser = new ExpressionParser();
oParser.RequireParentheses = chkParant.Checked;
oParser.ImplicitMultiplication = chkImplicit.Checked;
int iIterations = 1000;
try
{
iIterations = Int32.Parse(textBox4.Text.Trim());
}
catch
{
textBox4.Text = iIterations.ToString();
}
foreach (Control c in valuePanel.Controls)
{
VariableValue varVal = c as VariableValue;
if (varVal == null) continue;
if (String.IsNullOrEmpty(varVal.Variable)
|| String.IsNullOrEmpty(varVal.Value)) continue;
double val = 0;
if (Double.TryParse(varVal.Value, out val))
{
oParser.Values.Add(varVal.Variable, val);
}
else
{
oParser.Values.Add(varVal.Variable, varVal.Value);
}
}
string sFunction = textBox1.Text.Trim();
double fResult = 0f;
try
{
Cursor = Cursors.WaitCursor;
Stopwatch watch = new Stopwatch();
watch.Start();
// Parse expression once
fResult = oParser.Parse(sFunction);
// Fetch parsed tree
Expression expression = oParser.Expressions[sFunction];
// Iterate and evaluate tree
for (int i = 0; i < iIterations; i++)
{
fResult = oParser.EvalExpression(expression);
}
watch.Stop();
textBox2.Text = "Result: " + fResult + "\r\n";
textBox2.Text += "Iterations: " + iIterations + "\r\n";
textBox2.Text += "Time consumed: " + watch.ElapsedMilliseconds + " milliseconds.\r\n\r\n";
try
{
Assembly oAssembly = Assembly.LoadFrom("info.lundin.math.dll");
textBox2.Text += String.Format("Assembly: {0}\r\n.NET Runtime: {1}", oAssembly.FullName, oAssembly.ImageRuntimeVersion);
}
catch { }
}
catch (Exception ex)
{
textBox2.Text = ex.Message;
}
finally
{
Cursor = Cursors.Default;
}
}
public List<Pointd> Calcular(string function, double X0, double XF, double Y0, int N)
{
try
{
var h = (XF - X0) / N;
List<Pointd> list = new List<Pointd>();
list.Add(new Pointd(X0, Y0));
for (int i = 1; i <= N; i++)
{
var exp = new ExpressionParser();
exp.Values.Add("x", X0);
exp.Values.Add("y", Y0);
exp.Values.Add("t", X0);
var result = exp.Parse(function);
Y0 = Y0 + (h * result);
X0 = X0 + (h);
list.Add(new Pointd(X0, Y0));
}
return list;
}
catch (Exception)
{
return null;
}
}
