1 files changed, 73 insertions, 0 deletions
diff --git a/src/Ryujinx.Horizon/Sdk/Ngc/Detail/Set.cs b/src/Ryujinx.Horizon/Sdk/Ngc/Detail/Set.cs
new file mode 100644
index 00000000..559b7851
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Ngc/Detail/Set.cs
@@ -0,0 +1,73 @@
+namespace Ryujinx.Horizon.Sdk.Ngc.Detail
+{
+    class Set
+    {
+        public const int BitsPerWord = 32;
+
+        private readonly BitVector32 _bitVector;
+        private readonly SbvRank _sbvRank;
+
+        public BitVector32 BitVector => _bitVector;
+        public SbvRank SbvRank => _sbvRank;
+
+        public Set()
+        {
+            _bitVector = new();
+            _sbvRank = new();
+        }
+
+        public Set(int length)
+        {
+            _bitVector = new(length);
+            _sbvRank = new();
+        }
+
+        public void Build()
+        {
+            _sbvRank.Build(_bitVector.Array, _bitVector.BitLength);
+        }
+
+        public bool Import(ref BinaryReader reader)
+        {
+            return _bitVector.Import(ref reader) && _sbvRank.Import(ref reader, _bitVector.BitLength);
+        }
+
+        public bool Has(int index)
+        {
+            return _bitVector.Has(index);
+        }
+
+        public bool TurnOn(int index, int count)
+        {
+            return _bitVector.TurnOn(index, count);
+        }
+
+        public bool TurnOn(int index)
+        {
+            return _bitVector.TurnOn(index);
+        }
+
+        public int Rank1(int index)
+        {
+            if ((uint)index >= (uint)_bitVector.BitLength)
+            {
+                index = _bitVector.BitLength - 1;
+            }
+
+            return _sbvRank.CalcRank1(index, _bitVector.Array);
+        }
+
+        public int Select0(int index)
+        {
+            int length = _bitVector.BitLength;
+            int rankIndex = _sbvRank.CalcRank1(length - 1, _bitVector.Array);
+
+            if ((uint)index < (uint)(length - rankIndex))
+            {
+                return _sbvRank.CalcSelect0(index, length, _bitVector.Array);
+            }
+
+            return -1;
+        }
+    }
+}