29 lines
1.0 KiB
C#
29 lines
1.0 KiB
C#
using System;
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namespace Cryville.Common {
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public struct Qualified<T> : IFormattable where T : IConvertible {
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static readonly string _prefixes = "yzafpnμm kMGTPEZY";
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public T Value { get; set; }
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public string Unit { get; set; }
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public Qualified(string unit) : this(default, unit) { }
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public Qualified(T value, string unit) {
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Value = value;
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Unit = unit;
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}
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public override readonly string ToString() { return ToString("G3"); }
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public readonly string ToString(string format) { return ToString(format, null); }
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public readonly string ToString(string format, IFormatProvider formatProvider) {
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double value = Value.ToDouble(formatProvider);
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int expIndex = (int)System.Math.Log10(value) / 3;
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if (expIndex == 0) {
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return value.ToString(format, formatProvider) + Unit;
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}
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int prefixIndex = System.Math.Clamp(expIndex + 8, 0, _prefixes.Length - 1);
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value /= System.Math.Pow(1e3, prefixIndex - 8);
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return value.ToString(format, formatProvider) + _prefixes[prefixIndex] + Unit;
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}
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}
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}
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