public void DetailedSpeedTestWithOptimization()
{
var mp = new MathParser();
mp.LocalVariables.Add("x", 5);
var expr = "(3x+2)(2(2x+1))";
int itr = 3000;
double creationTimeAndTokenization = BenchmarkUtil.Benchmark(() => mp.GetTokens(expr), 1);
var tokens = mp.GetTokens(expr);
double parsingTime = BenchmarkUtil.Benchmark(() => mp.Parse(tokens), itr);
double totalTime = creationTimeAndTokenization + parsingTime;
//var mp = new MathParser();
//mp.LocalVariables.Add("x", 5);
//var expr = "(3x+2)(2(2x+1))";
//int itr = 50;
double parsingTime2 = BenchmarkUtil.Benchmark(() => mp.Parse(expr), itr);
double totalTime2 = parsingTime2;
}
public void CustomFunctionsWithSeveralArguments()
{
/*
* This example demonstrates the "anonymous method" way of adding
* a function that can take more than one agument.
*/
var parser = new MathParser(false);
parser.LocalFunctions.Add("log", delegate(double[] input)
{
// input[0] is the number
// input[1] is the base
if (input.Length == 1)
{
return(Math.Log(input[0]));
}
if (input.Length == 2)
{
return(Math.Log(input[0], input[1]));
}
return(0);
});
Assert.AreEqual(0.693147181, parser.Parse("log(2)"), 0.000000001);
Assert.AreEqual(0.63093, parser.Parse("log(2,3)"), 0.000001);
}
public void CustomFunctions()
{
/*
* This test demonstrates three ways of adding a function
* to the Math Parser
*
* 1) directly pointing to the function
* 2) lambda expression
* 3) anonymous method
*/
MathParser parser = new MathParser();
//for long functions
parser.LocalFunctions.Add("numberTimesTwo", NumberTimesTwoCustomFunction); // adding the function
decimal resultA = parser.Parse("numberTimesTwo(3)");
//for short functions, use lambda expression, or anonymous method
// 1) using lambda epxression (recommended)
parser.LocalFunctions.Add("square", x => x[0] * x[0]);
decimal resultB = parser.Parse("square(4)");
// 2) using anonymous method
parser.LocalFunctions.Add("cube", delegate(decimal[] x)
{
return(x[0] * x[0] * x[0]);
});
decimal resultC = parser.Parse("cube(2)");
}
public void ExceptionCatching()
{
var parser = new MathParser();
parser.Parse("(-1");
parser.Parse("rem(20,1,,,,)");
}
public void BuiltInFunctions()
{
var parser = new MathParser();
Assert.AreEqual(21, parser.Parse("round(21.333333333333)"));
Assert.AreEqual(1, parser.Parse("pow(2,0)"));
}
public void CustomFunctionsWithSeverelArguments()
{
/*
* This example demonstrates the "anonymous method" way of adding
* a function that can take more than one agument.
*/
MathParser parser = new MathParser(loadPreDefinedFunctions: false);
//for long functions
parser.LocalFunctions.Add("log", delegate(decimal[] input) // adding the function
{
// input[0] is the number
// input[1] is the base
if (input.Length == 1)
{
return((decimal)Math.Log((double)input[0]));
}
else if (input.Length == 2)
{
return((decimal)Math.Log((double)input[0], (double)input[1]));
}
else
{
return(0); // false
}
});
decimal resultA = parser.Parse("log(2)");
decimal resultB = parser.Parse("log(2,3)");
}
private double ParseCoefficient(string expression, string variable, List <string> variables)
{
var parser = new MathParser();
var variablePosition = expression.IndexOf(variable, StringComparison.Ordinal);
if (variablePosition == 0)
{
return(1);
}
var leftVariables = variables
.Where(x => x != variable && expression.Contains(x) && variablePosition - expression.IndexOf(x, StringComparison.Ordinal) > 0)
.OrderBy(x => variablePosition - expression.IndexOf(x, StringComparison.Ordinal));
if (!leftVariables.Any())
{
return((double)parser.Parse(expression.Substring(0, expression.IndexOf(variable, StringComparison.Ordinal))));
}
var leftVariable = leftVariables.First();
var leftVariablePosition = expression.IndexOf(leftVariable, StringComparison.Ordinal);
var str = leftVariablePosition < 0
? expression.Substring(0, expression.IndexOf(variable, StringComparison.Ordinal))
: expression.Substring(leftVariablePosition + 2, variablePosition - leftVariablePosition - 2);
if (str.Length == 1)
{
return(1);
}
return((double)parser.Parse(str));
}
public void BasicArithmetics()
{
var parser = new MathParser();
Assert.AreEqual(7, parser.Parse("5+2"));
Assert.AreEqual(11, parser.Parse("5+2*3"));
}
public void AdvancedArithmetic()
{
var parser = new MathParser();
Assert.AreEqual(30, parser.Parse("3(7+3)"));
Assert.AreEqual(20, parser.Parse("(2+3)(3+1)"));
}
public void CustomFunctions()
{
/*
* This test demonstrates three ways of adding a function
* to the Math Parser
*
* 1) directly pointing to the function
* 2) lambda expression
* 3) anonymous method
*/
var parser = new MathParser();
parser.LocalFunctions.Add("numberTimesTwo", NumberTimesTwo);
Assert.AreEqual(6, parser.Parse("numberTimesTwo(3)"));
parser.LocalFunctions.Add("square", x => x[0] * x[0]);
Assert.AreEqual(16, parser.Parse("square(4)"));
parser.LocalFunctions.Add("cube", delegate(double[] x)
{
return(x[0] * x[0] * x[0]);
});
Assert.AreEqual(8, parser.Parse("cube(2)"));
}
public void BasicArithmetic()
{
var parser = new MathParser();
Assert.AreEqual(7, parser.Parse("5 + 2"));
Assert.AreEqual(11, parser.Parse("5 + 2 * 3"));
Assert.AreEqual(17, parser.Parse("27 - 3 * 3 + 1 - 4 / 2"));
Assert.AreEqual(282429536481, parser.Parse("(27 ^ 2) ^ 4"));
}
public void NoLeadingZero()
{
var parser = new MathParser();
Assert.AreEqual(0.5, parser.Parse(".5"));
Assert.AreEqual(0.5, parser.Parse(".25 + .25"));
Assert.AreEqual(2.0, parser.Parse("1.5 + .5"));
Assert.AreEqual(-0.25, parser.Parse(".25 + (-.5)"));
Assert.AreEqual(0.25, parser.Parse(".5(.5)"));
}
public void ConditionStatements()
{
var parser = new MathParser();
Assert.AreEqual(1, parser.Parse("2 + 3 = 1 + 4"));
Assert.AreEqual(1, parser.Parse("3 + 2 > (2 - 1)"));
Assert.AreEqual(0, parser.Parse("2 + 2 = 22"));
Assert.AreEqual(0, parser.Parse("10 > 100"));
}
private double TestCongThuc(DataRow drDiem, DataRow[] arrDrDiem, string CongThucDiem, string IDThanhPhanThi, int IDKQHT_ThanhPhanTBHS, int LanThi)
{
double Value = 0; int SoSauDauPhay;
try
{
MathParser parser = new MathParser();
parser.CreateVar("TBHS", double.Parse("0" + drDiem[IDKQHT_ThanhPhanTBHS.ToString() + "_" + LanThi.ToString()]), null);
parser.CreateVar("THI", double.Parse("0" + drDiem[IDThanhPhanThi + "_" + LanThi.ToString()]), null);
foreach (DataRow dr in arrDrDiem)
{
if (!(dr["KyHieu"].ToString() == "TBHS" || dr["KyHieu"].ToString() == "THI"))
{
parser.CreateVar(dr["KyHieu"].ToString(), double.Parse("0" + dr["TongDiem"]), null);
parser.CreateVar("Count" + dr["KyHieu"], int.Parse("0" + dr["SoDiem"]), null);
}
}
string formula = CongThucDiem;
parser.OptimizationOn = true;
if (formula.IndexOf("R+(") == 0 | formula.IndexOf("R-(") == 0)
{
SoSauDauPhay = int.Parse(formula.Substring(3, 1));
double tmp = 0;
if (formula.IndexOf("R+(") == 0)
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, true);
}
else
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, false);
}
}
else
{
parser.Expression = formula;
parser.Parse();
Value = double.Parse(parser.Value.ToString());
}
return(Value);
}
catch (Exception)
{
return(0);
}
}
public void NegativeNumbers()
{
var parser = new MathParser();
Assert.AreEqual(0, parser.Parse("-1+1"));
Assert.AreEqual(1, parser.Parse("--1"));
Assert.AreEqual(-2, parser.Parse("-2"));
Assert.AreEqual(-2, parser.Parse("(-2)"));
// Assert.AreEqual(2, parser.Parse("-(-2)")); TODO: Fix
Assert.AreEqual(4, parser.Parse("(-2)(-2)"));
}
public void BuiltInFunctions()
{
MathParser parser = new MathParser(loadPreDefinedFunctions: true);
decimal result = parser.Parse("round(21.333333333333)");
Assert.AreEqual(result, 21);
decimal result2 = parser.Parse("pow(2,0)");
Assert.AreEqual(result2, 1);
}
public void BasicArithmetics()
{
MathParser parser = new MathParser();
decimal resultA = parser.Parse("5+2");
Assert.IsTrue(resultA == 7);
decimal resultB = parser.Parse("5+2*3");
Assert.IsTrue(resultB == 11);
}
public void ConditionStatements()
{
MathParser parser = new MathParser();
decimal resultA = parser.Parse("2+3=1+4");
Assert.IsTrue(resultA == 1);
decimal resultB = parser.Parse("3+2>(2-1)");
Assert.IsTrue(resultB == 1);
}
public void SpeedTests()
{
var parser = new MathParser();
parser.LocalVariables.Add("x", 10);
var list = parser.GetTokens("(3x+2)");
var time = BenchmarkUtil.Benchmark(() => parser.Parse("(3x+2)"), 25000);
var time2 = BenchmarkUtil.Benchmark(() => parser.Parse(list), 25000);
Assert.IsTrue(time >= time2);
}
public void ProgramicallyAddVariables()
{
var parser = new MathParser();
parser.ProgrammaticallyParse("let a = 2pi");
Assert.AreEqual(parser.LocalVariables["pi"] * 2, parser.Parse("a"), 0.00000000000001);
parser.ProgrammaticallyParse("b := 20");
Assert.AreEqual(20, parser.Parse("b"));
parser.ProgrammaticallyParse("let c be 25 + 2(2+3)");
Assert.AreEqual(35, parser.Parse("c"));
}
public void DecimalOperations()
{
//MathParser parser = new MathParser(new CultureInfo("sv-SE")); // uses "," as a decimal separator
//decimal resultA = parser.Parse("0,245 + 0,3");
//decimal resultB = parser.Parse("-0,245 + 0,3");
//Assert.IsTrue(resultB == decimal.Parse("0,055", new CultureInfo("sv-SE")));
MathParser parserDefault = new MathParser(); // or new MathParser(new CultureInfo("en-US"))
decimal resultC = parserDefault.Parse("0.245 + 0.3");
decimal resultD = parserDefault.Parse("-0.245 + 0.3");
Assert.IsTrue(resultD == decimal.Parse("0.055", parserDefault.CultureInfo));
}
public void ExceptionCatching()
{
MathParser parser = new MathParser();
try
{
decimal result = parser.Parse("(-1");
Assert.Fail(); // fail if the above expression hasn't thrown an exception
}
catch (ArithmeticException) { }
decimal tr = parser.Parse("rem(20,1,,,,)");
}
public void CustomFunctions()
{
var parser = new MathParser();
parser.LocalFunctions.Add("timesTwo", inputs => inputs[0] * 2);
Assert.AreEqual(6, parser.Parse("timesTwo(3)"));
Assert.AreEqual(42, parser.Parse("timesTwo((2+3)(3+1) + 1)"));
parser.LocalFunctions.Add("square", inputs => inputs[0] * inputs[0]);
Assert.AreEqual(16, parser.Parse("square(4)"));
parser.LocalFunctions.Add("cube", inputs => inputs[0] * inputs[0] * inputs[0]);
Assert.AreEqual(8, parser.Parse("cube(2)"));
}
private double TestCongThuc(double DiemTBMH, DataRow[] drDiem)
{
double Value = 0; int SoSauDauPhay;
try
{
// add thanh phan diem TBTK
parser.CreateVar("TBTK", DiemTBMH, null);
foreach (DataRow dr in drDiem)
{
parser.CreateVar(dr["MaMonHoc"].ToString(), double.Parse("0" + dr["Diem"].ToString()), null);
}
string formula = null;
formula = strCongThucDiem;
parser.OptimizationOn = true;
if (formula.IndexOf("R+(") == 0 | formula.IndexOf("R-(") == 0)
{
SoSauDauPhay = int.Parse(formula.Substring(3, 1));
double tmp = 0;
if (formula.IndexOf("R+(") == 0)
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, true);
}
else
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, false);
}
}
else
{
parser.Expression = formula;
parser.Parse();
Value = double.Parse(parser.Value.ToString());
}
return(Value);
}
catch (Exception)
{
return(0);
}
}
public void ExecutionTime()
{
Stopwatch _timer = new Stopwatch();
_timer.Start();
MathParser parser = new MathParser();
decimal result = parser.Parse("5+2");
decimal result2 = parser.Parse("5+2*3*1+2((1-2)(2-3))");
decimal result3 = parser.Parse("5+2*3*1+2((1-2)(2-3))*-1");
_timer.Stop();
Debug.WriteLine("time to parser with MathParser: " + _timer.ElapsedMilliseconds);
}
private double TestCongThuc(DataRow[] drDiem)
{
double Value = 0; int SoSauDauPhay;
try
{
MathParser parser = new MathParser();
foreach (DataRow dr in drDiem)
{
parser.CreateVar(dr["KyHieu"].ToString(), double.Parse("0" + dr["Diem"].ToString()), null);
}
string formula = null;
formula = drDiem[0]["CongThuc"].ToString();
parser.OptimizationOn = true;
if (formula.IndexOf("R+(") == 0 | formula.IndexOf("R-(") == 0)
{
SoSauDauPhay = int.Parse(formula.Substring(3, 1));
double tmp = 0;
if (formula.IndexOf("R+(") == 0)
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, true);
}
else
{
formula = formula.Substring(5, formula.Length - 5);
parser.Expression = formula;
parser.Parse();
tmp = double.Parse(parser.Value.ToString());
Value = parser.Round(tmp, SoSauDauPhay, false);
}
}
else
{
parser.Expression = formula;
parser.Parse();
Value = double.Parse(parser.Value.ToString());
}
return(Value);
}
catch (Exception)
{
return(0);
}
}
public void Parse()
{
var node = MathParser.Parse("3+3=2*3");
node = MathParser.Parse("sqrt(x) * sqrt(x) = 7");
node = MathParser.Parse("4 * x + 3 = 19");
}
public static double Integral(string Expression, double LowerIndex, double UpperIndex, char IterationVariable, int Kind)
{
var parser = new MathParser();
var Var = new Variable<double>(IterationVariable.ToString());
parser.Variables.Add(Var);
parser.Parse(Expression);
Func<double,double> proc = x =>
{
Var.Value = x;
return parser.Evaluate();
};
switch (Kind)
{
case 0:
return Integration.Trapezoidal(LowerIndex, UpperIndex, proc);
case 1:
return Integration.LeftHand(LowerIndex, UpperIndex, proc);
default:
return Integration.MidPoint(LowerIndex, UpperIndex, proc);
}
}
// Desarrolla los valores de a_k hasta el n_i máximo, permitiendo que se ingresen desde ningún valor de n_i hasta 3.
private void CreateA_nValues()
{
var temp = 0;
bool pudo = false;
foreach (var i in enes.Lines)
{
pudo = int.TryParse(i, out temp);
if (pudo)
{
n.Add(temp);
}
}
int max = int.MinValue;
for (int i = 0; i < n.Count; i++)
{
if (n[i] > max)
{
max = n[i];
}
}
for (int i = 0; i <= max; i++)
{
string exp = input.Text.Replace("n", "" + i);
a_nValues.Add((float)parser.Parse(exp));
}
}
public void CommaPiBug()
{
var parser = new MathParser();
var result = parser.Parse("pi");
Assert.AreEqual(result, parser.LocalVariables["pi"], 0.00000000000001);
}
public static double CalcStringFormula(List <string> Formulas)
{
double val = 0;
if (Formulas != null)
{
if (parser == null)
{
parser = new MathParser();
}
foreach (string f in Formulas)
{
if (string.IsNullOrEmpty(f))
{
continue;
}
string F = f.Replace("\n", "").Replace("\r", "").Replace("\t", "");
double v = parser.Parse(F, new System.Collections.Hashtable());
if (double.IsInfinity(v) || double.IsNaN(v))
{
v = 0;
}
val += v;
}
}
return(val);
}
public static void DumpTree(string mathCode)
{
Expression expression;
var tokenizer = new MathTokenizer();
var parser = new MathParser();
using (var reader = new StringReader(mathCode))
{
var tokens = tokenizer.Tokenize(reader);
expression = parser.Parse(tokens);
}
Console.WriteLine(expression.ToString());
}
public ConsoleMathTypeChecker()
{
parser = new MathParser();
parser.Factory = factory = new MathFactory();
parser.OnReduction += OnReduction;
parser.OnCompletion += OnCompletion;
parser.OnGroupError += OnGroupError;
parser.OnInternalError += OnInternalError;
parser.OnNotLoadedError += OnNotLoadedError;
parser.OnLexicalError += OnLexicalError;
parser.OnSyntaxError += OnSyntaxError;
Assembly a = typeof(ConsoleMathTypeChecker).Assembly;
parser.LoadGrammar(new BinaryReader(a.GetManifestResourceStream("QL_ExtensionTest.Grammar.QL_Grammar.egt")));
parser.Parse("form Form1 { \"Power:\" << answer1:int = 5 ^ 2; \"Modulo:\" << 10 % 5; \"Modulo2:\" << 10 % true; }");
}
public static MathValue InterpretSingle(string mathCode)
{
Expression expression;
var tokenizer = new MathTokenizer();
var parser = new MathParser();
using (var reader = new StringReader(mathCode))
{
var tokens = tokenizer.Tokenize(reader);
expression = parser.Parse(tokens);
}
var context = CreateGlobalContext();
var result = expression.Evaluate(context);
return result;
}
public static double Sigma(string Expression, double LowerIndex, double UpperIndex, char IterationVariable, double Step)
{
double Result = 0;
var parser = new MathParser();
var Var = new Variable<double>(IterationVariable.ToString());
parser.Variables.Add(Var);
parser.Parse(Expression);
for (var i = LowerIndex; i <= UpperIndex; i += Step)
{
Var.Value = i;
Result += parser.Evaluate();
}
return Result;
}
