Innovenergy_trunk/csharp/Lib/Units/Units.cs

103 lines
2.5 KiB
C#

namespace InnovEnergy.Lib.Units;
public static class Units
{
public static Byte DisplaySignificantDigits { get; set; } = 3;
public static Byte JsonSignificantDigits { get; set; } = 3;
public static Current A (this Double value) => value;
public static Voltage V (this Double value) => value;
public static Power W (this Double value) => value;
public static ReactivePower Var (this Double value) => value;
public static ApparentPower Va (this Double value) => value;
public static Resistance Ohm (this Double value) => value;
public static Frequency Hz (this Double value) => value;
public static Angle Rad (this Double value) => value;
public static Temperature Celsius(this Double value) => value;
public static Energy KWh (this Double value) => value;
}
public static class Prefixes
{
private static readonly IReadOnlyList<String> Big = new[]
{
"",
"k",
"M",
"G",
"T",
"P",
"E",
"Y",
};
private static readonly IReadOnlyList<String> Small = new[]
{
"",
"m",
"µ",
"n",
"p",
"f",
"a",
"z",
"y",
};
public static String TestGetPrefix(Double v, String unit)
{
if (v == 0)
return "";
var log10 = Math.Log10(v / 10);
var l = (Int32)Math.Floor(log10 / 3);
var lookUp = l > 0 ? Big : Small;
var i = Math.Abs(l);
return $"{v / Math.Pow(10.0, l * 3.0)} {lookUp[i]}{unit}";
}
public static String TestGetPrefix(Decimal v, String unit)
{
if (v == 0m)
return "";
var d = (Double)v;
var log10 = Math.Log10(d / 10);
var l = (Int32)Math.Floor(log10 / 3);
var lookUp = l > 0 ? Big : Small;
var i = Math.Abs(l);
return $"{d / Math.Pow(10.0, l * 3.0)} {lookUp[i]}{unit}";
}
public static String TestGetPrefix2(Decimal v, String unit)
{
if (v == 0m)
return "";
var a = Math.Abs(v);
var s = Math.Sign(v);
var i = 0;
while (a >= 10000m)
{
a /= 1000;
i++;
}
while (a < 10m)
{
a *= 1000;
i--;
}
var lookUp = i >= 0 ? Big : Small;
var r = Decimal.Floor(a * 10m) / 10m;
return $"{r*s} {lookUp[Math.Abs(i)]}{unit}";
}
}