private ValueInfo(IPhysicalQuantity quantity, IDimensionUnit unit, string substance, string location)
{
this.quantity = quantity;
this.unit = unit;
this.substance = substance;
this.location = location;
}
static IDimensionUnit defineUnit(IDimensionUnit u)
{
IDimensionUnit ou;
bool alreadyDefined = units.TryGetValue(u.Name, out ou) || units.TryGetValue(u.ShortName, out ou) || units.TryGetValue(u.Dimension, out ou);
if (alreadyDefined)
{
// redefinition check
if (string.Compare(ou.Name, u.Name, StringComparison.OrdinalIgnoreCase) == 0 &&
string.Compare(ou.Dimension, u.Dimension, StringComparison.OrdinalIgnoreCase) == 0)
{
return(ou);
}
System.Diagnostics.Trace.Assert(false, $"Redefinition of unit '{u.ShortName}__{u.Dimension}' : {ou.ShortName}__{ou.Dimension}");
}
// check unit dimension (all subdimensions must be predefined)
var subdimensions = u.Dimension.Split(dimensionsSeparators);
if (subdimensions.Length > 1)
{
foreach (var subdim in subdimensions)
{
if (char.IsLetter(subdim[0]))
{
System.Diagnostics.Trace.Assert(units.ContainsKey(subdim), "Unknown dimension '" + subdim + "' in '" + u.Dimension + '\'');
}
else
{
float tmp;
System.Diagnostics.Trace.Assert(float.TryParse(subdim, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out tmp) &&
Math.Abs(tmp) > float.Epsilon, "Invalid number '" + subdim + "' in dimension expression");
}
}
}
units.Add(u.Name, u);
if (!units.ContainsKey(u.ShortName))
{
units.Add(u.ShortName, u);
}
if (!units.ContainsKey(u.Dimension))
{
units.Add(u.Dimension, u);
}
return(u);
}
