From cee712105850ac3385cd0091a923438167433f9f Mon Sep 17 00:00:00 2001
From: TSR Berry <20988865+TSRBerry@users.noreply.github.com>
Date: Sat, 8 Apr 2023 01:22:00 +0200
Subject: Move solution and projects to src
---
src/Ryujinx.Audio/Renderer/Utils/BitArray.cs | 103 +++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100644 src/Ryujinx.Audio/Renderer/Utils/BitArray.cs
(limited to 'src/Ryujinx.Audio/Renderer/Utils/BitArray.cs')
diff --git a/src/Ryujinx.Audio/Renderer/Utils/BitArray.cs b/src/Ryujinx.Audio/Renderer/Utils/BitArray.cs
new file mode 100644
index 00000000..8b105477
--- /dev/null
+++ b/src/Ryujinx.Audio/Renderer/Utils/BitArray.cs
@@ -0,0 +1,103 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Utils
+{
+ /// <summary>
+ /// A simple bit array implementation backed by a <see cref="Memory{T}"/>.
+ /// </summary>
+ public class BitArray
+ {
+ /// <summary>
+ /// The backing storage of the <see cref="BitArray"/>.
+ /// </summary>
+ private Memory<byte> _storage;
+
+ /// <summary>
+ /// Create a new <see cref="BitArray"/> from <see cref="Memory{T}"/>.
+ /// </summary>
+ /// <param name="storage">The backing storage of the <see cref="BitArray"/>.</param>
+ public BitArray(Memory<byte> storage)
+ {
+ _storage = storage;
+ }
+
+ /// <summary>
+ /// Get the byte position of a given bit index.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ /// <returns>The byte position of a given bit index.</returns>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ private static int ToPosition(int index) => index / 8;
+
+ /// <summary>
+ /// Get the bit position of a given bit index inside a byte.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ /// <returns>The bit position of a given bit index inside a byte.</returns>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ private static int ToBitPosition(int index) => index % 8;
+
+ /// <summary>
+ /// Test if the bit at the given index is set.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ /// <returns>Return true if the bit at the given index is set</returns>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ public bool Test(int index)
+ {
+ ulong mask = 1ul << ToBitPosition(index);
+
+ return (_storage.Span[ToPosition(index)] & mask) == mask;
+ }
+
+ /// <summary>
+ /// Set the bit at the given index.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ public void Set(int index)
+ {
+ Set(index, true);
+ }
+
+ /// <summary>
+ /// Reset the bit at the given index.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ public void Reset(int index)
+ {
+ Set(index, false);
+ }
+
+ /// <summary>
+ /// Set a bit value at the given index.
+ /// </summary>
+ /// <param name="index">A bit index.</param>
+ /// <param name="value">The new bit value.</param>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ private void Set(int index, bool value)
+ {
+ byte mask = (byte)(1 << ToBitPosition(index));
+
+ if (value)
+ {
+ _storage.Span[ToPosition(index)] |= mask;
+ }
+ else
+ {
+ _storage.Span[ToPosition(index)] &= (byte)~mask;
+ }
+ }
+
+ /// <summary>
+ /// Reset all bits in the storage.
+ /// </summary>
+ [MethodImpl(MethodImplOptions.AggressiveInlining)]
+ public void Reset()
+ {
+ _storage.Span.Fill(0);
+ }
+ }
+}
\ No newline at end of file
--
cgit v1.2.3-70-g09d2