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