public static string FormatCompound <T>(this T q, ICollection <Unit <T> > units,
string separator = " ",
CompoundZeroHandling zeroHandling = CompoundZeroHandling.RemoveAny,
string lastNumberFormat = null, bool longNames = false, bool discardLastFraction = false) where T : unmanaged, IQuantity <T>
{
// compose info array
var infolist = new List <CompoundFormatInfo <T> .Info>();
foreach (var unit in units)
{
infolist.Add(new CompoundFormatInfo <T> .Info(unit));
}
var formatInfo = new CompoundFormatInfo <T>(separator,
lastNumberFormat, zeroHandling, longNames, discardLastFraction, infolist.ToArray());
return(q.FormatCompound(formatInfo));
}
public static string FormatCompound <T>(this T q,
CompoundFormatInfo <T> formatInfo) where T : unmanaged, IQuantity <T>
{
var str = new StringBuilder();
T remainder = q;
if (remainder.BaseValue < 0)
{
remainder = remainder.Multiply(-1);
str.Append("-");
}
bool writtenAnything = false;
for (int i = 0; i < formatInfo.UnitCount; i++)
{
var unit = formatInfo.GetUnit(i);
var zeroHandling = formatInfo.GetZeroHandling(i);
bool isLast = i == formatInfo.UnitCount - 1;
double val = unit.ConvertTo(remainder);
double whole = Math.Floor(val);
double frac = val - whole;
if (!isLast)
{
bool isZero = whole == 0.0;
bool take = true;
if (zeroHandling == CompoundZeroHandling.RemoveAny && isZero)
{
take = false;
}
else if (zeroHandling == CompoundZeroHandling.TrimBeginning &&
isZero && !writtenAnything)
{
take = false;
}
if (take)
{
var wholeQ = unit.ConvertFrom(whole);
str.Append(wholeQ.FormatAs(unit, formatInfo.GetNumberFormat(i),
formatInfo.UseLongNames,
formatInfo.GetUnitName(i)));
str.Append(formatInfo.GetSeparator(i));
writtenAnything = true;
}
remainder = unit.ConvertFrom(frac);
}
else
{
if (formatInfo.DiscardLastFraction)
{
remainder = unit.ConvertFrom(whole);
}
string last = remainder.FormatAs(unit, formatInfo.LastNumberFormat,
formatInfo.UseLongNames, formatInfo.GetUnitName(i));
if (zeroHandling != CompoundZeroHandling.RemoveAny ||
last.IndexOfAny(
new char[] { '1', '2', '3', '4', '5', '6', '7', '8', '9' }) >= 0)
{
str.Append(last);
writtenAnything = true;
}
}
}
return(str.ToString());
}
