From a108f39cbeadb8f6b2c538e68996b26266d90592 Mon Sep 17 00:00:00 2001
From: Misaki <misaki_39@outlook.com>
Date: Wed, 8 Apr 2026 21:01:21 +0900
Subject: [PATCH] feat(UnsafeBitSet): refactor iterator to use pointer

Refactored UnsafeBitSet.Iterator to store a pointer to the bitset and accept a start index in its constructor. Updated GetIterator to support an optional start parameter and return an iterator using a pointer to the current instance. Revised Program.cs to demonstrate new usage and removed unrelated code. Bumped assembly version to 1.6.11.
---
 .../Collections/UnsafeBitSet.cs                | 12 ++++++------
 .../Misaki.HighPerformance.LowLevel.csproj     |  2 +-
 Misaki.HighPerformance.Test/Program.cs         | 18 ++++++++----------
 3 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs b/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
index 7757e6d..2c8a63b 100644
--- a/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
+++ b/Misaki.HighPerformance.LowLevel/Collections/UnsafeBitSet.cs
@@ -36,18 +36,18 @@ public unsafe struct UnsafeBitSet : IDisposable, IEquatable<UnsafeBitSet>
 {
     public ref struct Iterator
     {
-        private UnsafeBitSet _bitSet;
+        private readonly UnsafeBitSet* _bitSet;
         private int _currentBit;
 
-        public Iterator(UnsafeBitSet bitSet)
+        public Iterator(UnsafeBitSet* bitSet, int start)
         {
             _bitSet = bitSet;
-            _currentBit = -1;
+            _currentBit = start - 1;
         }
 
         public bool Next(out int bitIndex)
         {
-            _currentBit = _bitSet.NextSetBit(_currentBit + 1);
+            _currentBit = _bitSet->NextSetBit(_currentBit + 1);
             bitIndex = _currentBit;
             return _currentBit != -1;
         }
@@ -143,9 +143,9 @@ public unsafe struct UnsafeBitSet : IDisposable, IEquatable<UnsafeBitSet>
         return (id >> _INDEX_SIZE) + int.Sign(id & _BIT_SIZE);
     }
 
-    public readonly Iterator GetIterator()
+    public readonly Iterator GetIterator(int start = 0)
     {
-        return new Iterator(this);
+        return new Iterator((UnsafeBitSet*)Unsafe.AsPointer(in this), start);
     }
 
     /// <summary>
diff --git a/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj b/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
index b71d5ac..d10e4b7 100644
--- a/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
+++ b/Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj
@@ -7,7 +7,7 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Misaki</Authors>
-    <AssemblyVersion>1.6.10</AssemblyVersion>
+    <AssemblyVersion>1.6.11</AssemblyVersion>
     <Version>$(AssemblyVersion)</Version>
     <PackageProjectUrl>https://git.personalnas.com/Misaki/Misaki.HighPerformance.git</PackageProjectUrl>
     <RepositoryUrl>https://git.personalnas.com/Misaki/Misaki.HighPerformance.git</RepositoryUrl>
diff --git a/Misaki.HighPerformance.Test/Program.cs b/Misaki.HighPerformance.Test/Program.cs
index 94d2b3b..8b481a9 100644
--- a/Misaki.HighPerformance.Test/Program.cs
+++ b/Misaki.HighPerformance.Test/Program.cs
@@ -1,14 +1,12 @@
-using BenchmarkDotNet.Running;
-using Misaki.HighPerformance.Mathematics;
-using Misaki.HighPerformance.Test.Benchmark;
+using Misaki.HighPerformance.LowLevel.Buffer;
+using Misaki.HighPerformance.LowLevel.Collections;
 
 //BenchmarkRunner.Run<SPMDBenchmark>();
 
-var faceDirection = math.normalize(float3.zero - new float3(0.0f, 0.0f, 5.0f));
-var test = quaternion.LookRotation(faceDirection, math.up());
-var test2 = quaternion.LookRotationSafe(faceDirection, math.up());
-var rotation = quaternion.EulerXYZ(new float3(0, math.radians(180.0f), 0));
+AllocationManager.Initialize(AllocationManagerInitOpts.Default);
+var set = new UnsafeBitSet(100, Allocator.Persistent, AllocationOption.Clear);
+set.SetBit(0);
+Console.WriteLine(set.NextSetBit(0));
 
-Console.WriteLine(test);
-Console.WriteLine(test2);
-Console.WriteLine(rotation);
\ No newline at end of file
+set.Dispose();
+AllocationManager.Dispose();