public void Evaluate_Function_Log()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("log(10 * 10 * 10 * 10)");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(4.0, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleFunction_AutoMultiply()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("5sqrt(x)");
double result = ae.Evaluate(16);
Assert.AreEqual(5.0 * Math.Sqrt(16), result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Precedence()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("1 / (2 * 4) ^ 2");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(1.0 / Math.Pow(2.0 * 4.0, 2), result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleExpression()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(2 - 1 + 6) % 5");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual((2 - 1 + 6) % 5, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Parentheses()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("((( ((( ((( 1 + 2 ))) + 3 ))) + 4 ))) + 5");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(1 + 2 + 3 + 4 + 5, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Function_RoundDown()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("round(z)");
double result = ae.Evaluate(6.49);
Assert.AreEqual(6.0, result);
Assert.AreEqual("z", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleFunction()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("cos(custom)");
double result = ae.Evaluate(0);
Assert.AreEqual(1.0, result);
Assert.AreEqual("custom", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Variable()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("x");
double result = ae.Evaluate(-10);
Assert.AreEqual(-10, result);
Assert.AreEqual("x", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Constant_AutoMultiply()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("2pi");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(2.0 * Math.PI, result);
Assert.IsNull(ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Constant_3()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("6e-3");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(0.006, result);
Assert.IsNull(ae.VariableName);
Assert.IsTrue(ae.IsSimpleConstantOnly);
}
public void Evaluate_Comment()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("1 + 2 + 3 # This is comment!");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(6, result);
Assert.IsNull(ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Variable_2()
{
ArithmeticExpression ae1 = ArithmeticExpression.Parse("sin(x)");
double result1 = ae1.Evaluate(10);
ArithmeticExpression ae2 = ArithmeticExpression.Parse("sin(10)");
double result2 = ae2.Evaluate(double.NaN);
Assert.AreEqual(result1, result2);
}
public void Evaluate_KnownConstants()
{
ArithmeticExpression ae1 = ArithmeticExpression.Parse("pi");
double result1 = ae1.Evaluate(double.NaN);
Assert.AreEqual(Math.PI, result1);
ArithmeticExpression ae2 = ArithmeticExpression.Parse("e");
double result2 = ae2.Evaluate(double.NaN);
Assert.AreEqual(Math.E, result2);
}
public void Evaluate_Callbacks()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(+1) * (-2) * 3");
DotNetOperatorCallbacks callbacks = new DotNetOperatorCallbacks();
ae.Callbacks = callbacks;
double result = ae.Evaluate(0);
Assert.AreEqual((+1) * (-2) * 3, result);
Assert.AreEqual(callbacks, ae.Callbacks);
Assert.IsFalse(callbacks.IsDisposed);
callbacks.Dispose();
Assert.IsTrue(callbacks.IsDisposed);
}
private void OnItemPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "Text")
{
ListView.Item item = (ListView.Item)sender;
if (string.IsNullOrEmpty(item.Text))
{
item.NumericValueSource = null;
item.TextDisplay = "\f[0x999999]" + Tx.T("main.enter expression");
}
else
{
try {
ArithmeticExpression ae = ArithmeticExpression.Parse(item.Text);
ae.Callbacks = item.OperatorCallbacks;
item.NumericValueSource = ae;
int i = item.Text.IndexOf('#');
if (i != -1)
{
while (i > 0 && item.Text[i - 1] == ' ')
{
i--;
}
StringBuilder sb = new StringBuilder();
sb.Append(item.Text, 0, i);
if (ae.VariableName == null && !ae.IsSimpleConstantOnly)
{
double result = ae.Evaluate(double.NaN);
sb.Append("\f[I]\f[0x999999] = ");
sb.Append(result.ToExactString().LimitSize(32));
sb.Append(" \f[I]");
}
sb.Append("\f[0x498E3E]");
sb.Append(item.Text, i, item.Text.Length - i);
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
else
{
if (ae.VariableName == null && !ae.IsSimpleConstantOnly)
{
StringBuilder sb = new StringBuilder();
sb.Append(item.Text);
double result = ae.Evaluate(double.NaN);
sb.Append("\f[I]\f[0x999999] = ");
if (double.IsPositiveInfinity(result))
{
sb.Append("+∞");
}
else if (double.IsNegativeInfinity(result))
{
sb.Append("−∞");
}
else
{
sb.Append(result.ToExactString().LimitSize(32));
}
sb.Append("\f[I]");
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
else
{
StringBuilder sb = new StringBuilder();
sb.Append(item.Text);
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
}
} catch (SyntaxException ex) {
item.NumericValueSource = null;
StringBuilder sb = new StringBuilder();
sb.Append("\f[0x8b0000]");
int length = ex.Input.IndexOf('#');
if (length == -1)
{
length = ex.Input.Length;
}
if (length < 3)
{
sb.Append(ex.Input);
}
else
{
if (ex.Index - 1 < 0)
{
sb.Append("\f[U]");
}
else
{
sb.Append(ex.Input, 0, ex.Index - 1);
sb.Append("\f[U]\f[0xd00000]");
sb.Append(ex.Input[ex.Index - 1]);
}
sb.Append("\f[0xff0000]");
sb.Append(ex.Input[ex.Index]);
if (ex.Index + 1 < length)
{
sb.Append("\f[0xd00000]");
sb.Append(ex.Input[ex.Index + 1]);
sb.Append("\f[0x8b0000]\f[U]");
if (ex.Index + 2 < length)
{
sb.Append(ex.Input, ex.Index + 2, length - (ex.Index + 2));
}
}
else
{
sb.Append("\f[0xd00000] \f[U]");
}
}
switch (ex.ExceptionType)
{
case SyntaxException.Type.Unknown:
break;
case SyntaxException.Type.InvalidNumber:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.invalid number"));
break;
case SyntaxException.Type.DistinctVariableCountExceeded:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.distinct variable count exceeded"));
break;
case SyntaxException.Type.ParenthesesCountMismatch:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.parentheses count mismatch"));
break;
default:
throw new InvalidEnumArgumentException("ex.ExceptionType", (int)ex.ExceptionType, typeof(SyntaxException.Type));
}
item.TextDisplay = sb.ToString();
} catch (Exception ex) {
item.NumericValueSource = null;
item.TextDisplay = "\f[0x8b0000]" + item.Text + " \f[-]\f[image:warning] \f[0xaa6400]\f[I]" + ex.Message;
}
}
item.CheckEnabled = (item.NumericValueSource != null);
RefreshToolStrip();
}
else if (e.PropertyName == "OperatorCallbacks")
{
ListView.Item item = (ListView.Item)sender;
ArithmeticExpression arithmeticExpression = item.NumericValueSource as ArithmeticExpression;
if (arithmeticExpression != null)
{
arithmeticExpression.Callbacks = item.OperatorCallbacks;
OnItemPropertyChanged(item, new PropertyChangedEventArgs("Text"));
}
item.Description = item.OperatorCallbacks.ImplementationName;
}
}
private unsafe void OnExportSelectedButtonClick(object sender, EventArgs e)
{
ListView.Item selected = listView.FocusedItem;
if (selected == null)
{
// Nothing to export...
return;
}
ArithmeticExpression ae = selected.NumericValueSource as ArithmeticExpression;
if (ae == null)
{
MessageBox.Show(this, Tx.T("dataset.errors.item not supported"), Tx.T("main.error"), MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
long xFi = 0, xLi = 0, distance = 0;
if (ae.VariableName != null)
{
double xF_ = graph.MinVisibleX;
double xL_ = graph.MaxVisibleX;
if (xF_ >= xL_)
{
MessageBox.Show(this, Tx.T("dataset.errors.cannot determine interval"), Tx.T("main.error"),
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (Math.Sign(xF_) != Math.Sign(xL_))
{
MessageBox.Show(this, Tx.T("dataset.errors.interval with zero"), Tx.T("main.error"),
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
// Swap first and last for negative "x" values
xFi = *(long *)&xF_;
xLi = *(long *)&xL_;
if (xFi > xLi)
{
long swap = xLi;
xLi = xFi;
xFi = swap;
}
distance = (xLi - xFi);
if (distance < 0)
{
MessageBox.Show(this, Tx.T("dataset.errors.interval too big"), Tx.T("main.error"),
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (distance > 10 * 1000 * 1000)
{
long sizeInMB = (distance * 8 * 2 / 1024 / 1024);
string sizeString;
if (sizeInMB > 100L * 1024L)
{
sizeString = Tx.N(sizeInMB / 1024) + " GB";
}
else
{
sizeString = Tx.N(sizeInMB) + " MB";
}
if (MessageBox.Show(this, Tx.T("dataset.errors.file too big", Tx.N(distance), sizeString), Tx.T("main.warning"),
MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) != DialogResult.OK)
{
return;
}
}
}
using (SaveFileDialog dialog = new SaveFileDialog()) {
const string ext = ".fvis-values";
dialog.Filter = Tx.T("dataset.filetype") + " (*" + ext + ")|*" + ext;
dialog.FilterIndex = 0;
dialog.RestoreDirectory = true;
dialog.Title = Tx.T("dataset.save");
string filename = selected.Text;
char[] invalidChars = Path.GetInvalidFileNameChars();
for (int i = 0; i < invalidChars.Length; i++)
{
filename = filename.Replace(invalidChars[i], '_');
}
dialog.FileName = filename + ext;
if (dialog.ShowDialog(this) != DialogResult.OK)
{
return;
}
filename = dialog.FileName;
ProgressDialog progressDialog = new ProgressDialog();
progressDialog.Text = Tx.T("dataset.saving.title");
progressDialog.MainInstruction = Tx.T("dataset.saving.description");
progressDialog.Line1 = Tx.T("dataset.saving.progress", "0", Tx.N(xLi - xFi));
progressDialog.Show(this);
ThreadPool.UnsafeQueueUserWorkItem(delegate {
using (FileStream s = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.None))
using (BinaryWriter bw = new BinaryWriter(s)) {
bw.Write(new[] { (byte)'f', (byte)'V', (byte)'i', (byte)'s' });
const int flags = 0;
bw.Write(flags);
string description = selected.Text;
bw.Write(description);
// Save graph viewport settings
long axisX = graph.AxisX;
long axisY = graph.AxisY;
double scaleFactor = graph.ScaleFactor;
bw.Write(axisX);
bw.Write(axisY);
bw.Write(scaleFactor);
if (ae.VariableName == null)
{
// Constant function, save only one value
double y = ae.Evaluate(double.NaN);
const long count = 2;
bw.Write(count);
bw.Write(double.MinValue);
bw.Write(y);
bw.Write(double.MaxValue);
bw.Write(y);
}
else
{
bw.Write(distance + 1);
Stopwatch sw = Stopwatch.StartNew();
long lastProcessed = xFi;
for (long xi = xFi; xi <= xLi; xi++)
{
double x = *(double *)ξ
double y = ae.Evaluate(x);
bw.Write(x);
bw.Write(y);
if (sw.ElapsedMilliseconds > 4000)
{
if (progressDialog.IsCancelled)
{
break;
}
sw.Stop();
long delta = (xi - lastProcessed);
long rate = delta * 1000 / (long)sw.Elapsed.TotalMilliseconds;
TimeSpan remaining = TimeSpan.FromSeconds((xLi - xi) / rate);
lastProcessed = xi;
BeginInvoke((MethodInvoker) delegate {
progressDialog.Line1 = Tx.T("dataset.saving.progress", Tx.N(lastProcessed - xFi), Tx.N(xLi - xFi));
progressDialog.Line2 = Tx.T("main.remaining time", remaining.ToTextString());
progressDialog.Progress = (int)((lastProcessed - xFi) * 100 / (xLi - xFi));
});
sw.Restart();
}
}
sw.Stop();
}
}
if (progressDialog.IsCancelled)
{
try {
File.Delete(filename);
} catch {
// Nothing to do...
}
}
BeginInvoke((MethodInvoker) delegate {
progressDialog.TaskCompleted();
});
}, null);
}
}
