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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| #if NETFRAMEWORK || NETSTANDARD2_0 | ||
| using System.Runtime.CompilerServices; | ||
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| namespace System; | ||
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| /// <summary></summary> | ||
| public readonly struct Index : IEquatable<Index> | ||
| { | ||
| /// <summary></summary> | ||
| private readonly Int32 _value; | ||
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| /// <summary></summary> | ||
| public static Index Start => new(0); | ||
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| /// <summary></summary> | ||
| public static Index End => new(-1); | ||
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| /// <summary></summary> | ||
| public Int32 Value => _value < 0 ? ~_value : _value; | ||
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| /// <summary></summary> | ||
| public Boolean IsFromEnd => _value < 0; | ||
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| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| /// <param name="fromEnd"></param> | ||
| /// <exception cref="ArgumentOutOfRangeException"></exception> | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public Index(Int32 value, Boolean fromEnd = false) | ||
| { | ||
| if (value < 0) | ||
| { | ||
| throw new ArgumentOutOfRangeException("value", "value must be non-negative"); | ||
| } | ||
| _value = fromEnd ? ~value : value; | ||
| } | ||
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| private Index(Int32 value) => _value = value; | ||
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| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| /// <returns></returns> | ||
| /// <exception cref="ArgumentOutOfRangeException"></exception> | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public static Index FromStart(Int32 value) | ||
| { | ||
| if (value < 0) | ||
| { | ||
| throw new ArgumentOutOfRangeException("value", "value must be non-negative"); | ||
| } | ||
| return new Index(value); | ||
| } | ||
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| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| /// <returns></returns> | ||
| /// <exception cref="ArgumentOutOfRangeException"></exception> | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public static Index FromEnd(Int32 value) | ||
| { | ||
| if (value < 0) | ||
| { | ||
| throw new ArgumentOutOfRangeException("value", "value must be non-negative"); | ||
| } | ||
| return new Index(~value); | ||
| } | ||
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| /// <summary></summary> | ||
| /// <param name="length"></param> | ||
| /// <returns></returns> | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public Int32 GetOffset(Int32 length) | ||
| { | ||
| var offset = _value; | ||
| if (IsFromEnd) | ||
| { | ||
| offset += length + 1; | ||
| } | ||
| return offset; | ||
| } | ||
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| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| /// <returns></returns> | ||
| public override Boolean Equals(Object value) => value is Index index && _value == index._value; | ||
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| /// <summary></summary> | ||
| /// <param name="other"></param> | ||
| /// <returns></returns> | ||
| public Boolean Equals(Index other) => _value == other._value; | ||
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| /// <summary></summary> | ||
| /// <returns></returns> | ||
| public override Int32 GetHashCode() => _value; | ||
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| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| public static implicit operator Index(Int32 value) => FromStart(value); | ||
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| /// <summary></summary> | ||
| /// <returns></returns> | ||
| public override String ToString() | ||
| { | ||
| if (IsFromEnd) | ||
| { | ||
| return "^" + (UInt32)Value; | ||
| } | ||
| return ((UInt32)Value).ToString(); | ||
| } | ||
| } | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| #if NETFRAMEWORK || NETSTANDARD2_0 | ||
| using System.Runtime.CompilerServices; | ||
|
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||
| namespace System; | ||
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| /// <summary></summary> | ||
| public readonly struct Range : IEquatable<Range> | ||
| { | ||
| /// <summary></summary> | ||
| public Index Start { get; } | ||
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| /// <summary></summary> | ||
| public Index End { get; } | ||
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| /// <summary></summary> | ||
| public static Range All => new(Index.Start, Index.End); | ||
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| /// <summary></summary> | ||
| /// <param name="start"></param> | ||
| /// <param name="end"></param> | ||
| public Range(Index start, Index end) | ||
| { | ||
| Start = start; | ||
| End = end; | ||
| } | ||
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||
| /// <summary></summary> | ||
| /// <param name="value"></param> | ||
| /// <returns></returns> | ||
| public override Boolean Equals(Object value) | ||
| { | ||
| if (value is Range r) | ||
| { | ||
| if (r.Start.Equals(Start)) | ||
| { | ||
| return r.End.Equals(End); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
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| /// <summary></summary> | ||
| /// <param name="other"></param> | ||
| /// <returns></returns> | ||
| public Boolean Equals(Range other) => other.Start.Equals(Start) && other.End.Equals(End); | ||
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| /// <summary></summary> | ||
| /// <returns></returns> | ||
| public override Int32 GetHashCode() => Start.GetHashCode() * 31 + End.GetHashCode(); | ||
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| /// <summary></summary> | ||
| /// <returns></returns> | ||
| public override String ToString() => Start.ToString() + ".." + End; | ||
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| /// <summary></summary> | ||
| /// <param name="start"></param> | ||
| /// <returns></returns> | ||
| public static Range StartAt(Index start) => new(start, Index.End); | ||
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| /// <summary></summary> | ||
| /// <param name="end"></param> | ||
| /// <returns></returns> | ||
| public static Range EndAt(Index end) => new(Index.Start, end); | ||
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| /// <summary></summary> | ||
| /// <param name="length"></param> | ||
| /// <returns></returns> | ||
| /// <exception cref="ArgumentOutOfRangeException"></exception> | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| //[CLSCompliant(false)] | ||
| public (Int32 Offset, Int32 Length) GetOffsetAndLength(Int32 length) | ||
| { | ||
| var startIndex = Start; | ||
| var start = ((!startIndex.IsFromEnd) ? startIndex.Value : (length - startIndex.Value)); | ||
| var endIndex = End; | ||
| var end = ((!endIndex.IsFromEnd) ? endIndex.Value : (length - endIndex.Value)); | ||
| if ((UInt32)end > (UInt32)length || (UInt32)start > (UInt32)end) | ||
| { | ||
| throw new ArgumentOutOfRangeException("length"); | ||
| } | ||
| return (start, end - start); | ||
| } | ||
| } | ||
| #endif |
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