78 lines
2.0 KiB
C#
78 lines
2.0 KiB
C#
using System;
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namespace VirtualNes.Core
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{
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public class ArrayRef<T>
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{
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public T[] RawArray => m_rawArray;
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private T[] m_rawArray;
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private int m_offset;
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private int m_length;
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public int Offset
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{
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get => m_offset;
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set
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{
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var gap = value - m_offset;
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m_length -= gap;
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}
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}
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public ArrayRef() { }
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public ArrayRef(T[] array, int offset, int length)
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{
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SetArray(array, offset, length);
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}
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public ArrayRef(T[] array) : this(array, 0, array.Length) { }
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public ArrayRef(T[] array, int offset) : this(array, offset, array.Length - offset) { }
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public void SetArray(T[] array, int offset, int length)
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{
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m_rawArray = array;
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m_offset = offset;
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m_length = length;
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}
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public void SetArray(T[] array, int offset)
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{
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m_rawArray = array;
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m_offset = offset;
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m_length = array.Length - offset;
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}
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public T this[int index]
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{
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get
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{
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return m_rawArray[m_offset + index];
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}
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set
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{
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m_rawArray[(m_offset + index)] = value;
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}
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}
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public void WriteTo(T[] source, int start, int length)
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{
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Array.Copy(source, 0, m_rawArray, Offset + start, length);
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}
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public Span<T> Span(int start, int length)
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{
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return new Span<T>(m_rawArray, start + Offset, length);
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}
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public static implicit operator ArrayRef<T>(T[] array)
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{
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return new ArrayRef<T>(array);
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}
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public static implicit operator Span<T>(ArrayRef<T> array)
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{
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return new Span<T>(array.m_rawArray, array.Offset, array.m_length);
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}
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}
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}
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