diff options
Diffstat (limited to 'crates/fparkan-runtime/tests')
| -rw-r--r-- | crates/fparkan-runtime/tests/behavior_distributor_tick_native_oracle.cs | 220 |
1 files changed, 213 insertions, 7 deletions
diff --git a/crates/fparkan-runtime/tests/behavior_distributor_tick_native_oracle.cs b/crates/fparkan-runtime/tests/behavior_distributor_tick_native_oracle.cs index 2d5e206..5c7c4f2 100644 --- a/crates/fparkan-runtime/tests/behavior_distributor_tick_native_oracle.cs +++ b/crates/fparkan-runtime/tests/behavior_distributor_tick_native_oracle.cs @@ -5,9 +5,9 @@ using System.Runtime.InteropServices; using System.Security.Cryptography; using System.Text; -// Calls the original x86 Behavior.dll distributor tick against synthetic vtables. -// Only the imported GetSystemArealMap IAT slot is replaced; the tick instructions -// and its internal helpers remain the installed DLL's original code. +// Calls the original x86 Behavior.dll distributor Add, normalize, and tick paths +// against synthetic storage. Only GetSystemArealMap and the bounded vector backing +// are substituted; Behavior's corresponding instructions remain the installed DLL. internal static class BehaviorDistributorTickOracle { private const uint LoadWithAlteredSearchPath = 0x00000008; private const uint MemCommitReserve = 0x00003000; @@ -16,6 +16,8 @@ internal static class BehaviorDistributorTickOracle { private const uint PageReadWrite = 0x04; private const string ExpectedBehaviorSha256 = "ddfbdbde07832358fe6e35e01c8dba9b58e7313789498b6049ed51d4ed9baf99"; private const int TickRva = 0x19e80; + private const int AddObjectRva = 0x1aac0; + private const int NormalizeRva = 0x1ac90; private const int GetSystemArealMapIatRva = 0x59008; private const uint ResourceProperty = 0x02000100; private static Fixture active; @@ -28,7 +30,12 @@ internal static class BehaviorDistributorTickOracle { [DllImport("kernel32.dll", SetLastError = true)] private static extern bool VirtualProtect(IntPtr address, UIntPtr size, uint protect, out uint oldProtect); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] private delegate IntPtr AreaMapGetter(); + [UnmanagedFunctionPointer(CallingConvention.Cdecl)] private delegate void X87ControlWordReader(); + [UnmanagedFunctionPointer(CallingConvention.Cdecl)] private delegate void X87ControlWordWriter(); [UnmanagedFunctionPointer(CallingConvention.ThisCall)] private delegate void TickDelegate(IntPtr self, float deltaSeconds); + [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate void NativeAddObject(IntPtr self, uint key); + [UnmanagedFunctionPointer(CallingConvention.ThisCall)] private delegate void NativeNormalize(IntPtr self, uint key); + [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate void VectorInsert(IntPtr self, IntPtr source, uint count, uint position); [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate IntPtr MapLookup(IntPtr self, uint key); [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate int ObjectState(IntPtr self); [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate uint ObjectClass(IntPtr self); @@ -40,6 +47,7 @@ internal static class BehaviorDistributorTickOracle { [UnmanagedFunctionPointer(CallingConvention.StdCall)] private delegate int InterfaceSetProperty(IntPtr self, uint selector, IntPtr value); private static readonly AreaMapGetter AreaMapGetterCallback = GetAreaMap; + private static readonly VectorInsert VectorInsertCallback = InsertVector; private static readonly MapLookup MapLookupCallback = Lookup; private static readonly ObjectState ObjectStateCallback = GetObjectState; private static readonly ObjectClass ObjectClassCallback = GetObjectClass; @@ -53,6 +61,10 @@ internal static class BehaviorDistributorTickOracle { private static IntPtr queryObjectThunk; private static IntPtr getInterfacePropertyThunk; private static IntPtr setInterfacePropertyThunk; + private static IntPtr vectorInsertThunk; + private static IntPtr x87ControlWordCell; + private static X87ControlWordReader x87ControlWordReader; + private static X87ControlWordWriter x87ControlWordWriter; private sealed class NativeObject { public IntPtr Self; @@ -84,6 +96,7 @@ internal static class BehaviorDistributorTickOracle { private sealed class Fixture : IDisposable { public IntPtr Distributor; public IntPtr Entries; + public IntPtr VectorVtable; public IntPtr Manager; public IntPtr ManagerVtable; public readonly List<IntPtr> Allocations = new List<IntPtr>(); @@ -91,6 +104,7 @@ internal static class BehaviorDistributorTickOracle { public readonly List<string> Calls = new List<string>(); public readonly List<string> Trace = new List<string>(); public int LookupCount; + public int VectorInsertCalls; public NativeObject AddObject(uint key, uint classCode, float powerRate, float oreRate, float property, int state) { NativeObject item = new NativeObject(); item.Key = key; @@ -129,8 +143,14 @@ internal static class BehaviorDistributorTickOracle { } public void MakeDistributor(params uint[] keys) { Distributor = Allocate(0x44); - Entries = Allocate(Math.Max(1, keys.Length) * 0x1c); + const int capacity = 32; + if (keys.Length > capacity) throw new InvalidOperationException("synthetic distributor capacity exceeded"); + Entries = Allocate(capacity * 0x1c); + VectorVtable = Allocate(0x20); + Marshal.WriteIntPtr(VectorVtable, 0x10, vectorInsertThunk); + Marshal.WriteIntPtr(Distributor, 0x1c, VectorVtable); Marshal.WriteInt32(Distributor, 0x20, keys.Length); + Marshal.WriteInt32(Distributor, 0x24, capacity); Marshal.WriteIntPtr(Distributor, 0x28, Entries); for (int i = 0; i < keys.Length; i++) { IntPtr entry = IntPtr.Add(Entries, i * 0x1c); @@ -152,6 +172,21 @@ internal static class BehaviorDistributorTickOracle { } private static IntPtr GetAreaMap() { return active.Manager; } + private static void InsertVector(IntPtr self, IntPtr source, uint count, uint position) { + int length = Marshal.ReadInt32(self, 4); + int capacity = Marshal.ReadInt32(self, 8); + IntPtr destination = Marshal.ReadIntPtr(self, 12); + Expect(count > 0 && count <= (uint)(capacity - length), "bounded vector insertion capacity"); + Expect(position == 0xffffffff || position == (uint)length, "native append position"); + byte[] entry = new byte[0x1c]; + for (uint index = 0; index < count; index++) { + Marshal.Copy(IntPtr.Add(source, unchecked((int)(index * 0x1c))), entry, 0, entry.Length); + Marshal.Copy(entry, 0, IntPtr.Add(destination, (length + (int)index) * 0x1c), entry.Length); + } + Marshal.WriteInt32(self, 4, length + (int)count); + active.VectorInsertCalls++; + active.Trace.Add("insert:" + count.ToString() + ":" + position.ToString("x8")); + } private static IntPtr Lookup(IntPtr self, uint key) { active.Calls.Add("lookup:" + key.ToString("x8")); active.LookupCount++; @@ -283,12 +318,17 @@ internal static class BehaviorDistributorTickOracle { queryObjectThunk = WriteFastcallToStdcallThunk(0x00, Marshal.GetFunctionPointerForDelegate(ObjectQueryCallback)); getInterfacePropertyThunk = WriteFastcallToStdcallThunk(0x40, Marshal.GetFunctionPointerForDelegate(InterfaceGetCallback)); setInterfacePropertyThunk = WriteFastcallToStdcallThunk(0x80, Marshal.GetFunctionPointerForDelegate(InterfaceSetCallback)); + vectorInsertThunk = WriteThisCallThreeArgsToStdcallThunk(0xc0, Marshal.GetFunctionPointerForDelegate(VectorInsertCallback)); + x87ControlWordCell = Marshal.AllocHGlobal(2); + Marshal.WriteInt16(x87ControlWordCell, 0); + x87ControlWordReader = (X87ControlWordReader)Marshal.GetDelegateForFunctionPointer(WriteX87ControlWordReader(0x100), typeof(X87ControlWordReader)); + x87ControlWordWriter = (X87ControlWordWriter)Marshal.GetDelegateForFunctionPointer(WriteX87ControlWordWriter(0x120), typeof(X87ControlWordWriter)); if (!VirtualProtect(import, new UIntPtr((uint)IntPtr.Size), PageReadWrite, out oldProtection)) throw new InvalidOperationException("VirtualProtect(GetSystemArealMap IAT) failed: " + Marshal.GetLastWin32Error()); protectionChanged = true; Marshal.WriteIntPtr(import, Marshal.GetFunctionPointerForDelegate(AreaMapGetterCallback)); RunSmokeCases(module); - Console.WriteLine("original Behavior.dll distributor tick oracle passed (RVA 0x19e80; only GetSystemArealMap IAT substituted; this does not compare Rust parity)."); + Console.WriteLine("original Behavior.dll distributor oracle passed (native Add 0x1aac0, normalize 0x1ac90, tick 0x19e80; only GetSystemArealMap IAT and bounded vector insertion are substituted; this does not compare Rust parity)."); return 0; } catch (Exception error) { @@ -301,18 +341,30 @@ internal static class BehaviorDistributorTickOracle { uint ignored; VirtualProtect(import, new UIntPtr((uint)IntPtr.Size), oldProtection, out ignored); } - GC.KeepAlive(AreaMapGetterCallback); GC.KeepAlive(MapLookupCallback); + GC.KeepAlive(AreaMapGetterCallback); GC.KeepAlive(VectorInsertCallback); GC.KeepAlive(x87ControlWordReader); GC.KeepAlive(x87ControlWordWriter); GC.KeepAlive(MapLookupCallback); GC.KeepAlive(ObjectStateCallback); GC.KeepAlive(ObjectClassCallback); GC.KeepAlive(ObjectQueryCallback); GC.KeepAlive(ObjectRateCallback); GC.KeepAlive(ObjectGetPropertyCallback); GC.KeepAlive(ObjectSetPropertyCallback); GC.KeepAlive(InterfaceGetCallback); GC.KeepAlive(InterfaceSetCallback); if (thunksAllocated && !VirtualFree(fastcallThunks, UIntPtr.Zero, MemRelease)) throw new InvalidOperationException("VirtualFree(fastcall callback thunks) failed: " + Marshal.GetLastWin32Error()); + if (x87ControlWordCell != IntPtr.Zero) { Marshal.FreeHGlobal(x87ControlWordCell); x87ControlWordCell = IntPtr.Zero; } FreeLibrary(module); } } private static void RunSmokeCases(IntPtr module) { + ushort savedControlWord = CurrentX87ControlWord(); + Console.WriteLine("x87-control-word-before=0x" + savedControlWord.ToString("x4") + " (x86 oracle process)"); + try { + SetX87ControlWord(0x007f); + Console.WriteLine("native-add-normalize-x87-control-word=0x" + CurrentX87ControlWord().ToString("x4")); + RunNativeAddCases(module); + RunNativeNormalizeCases(module); + } finally { + SetX87ControlWord(savedControlWord); + Console.WriteLine("x87-control-word-restored=0x" + CurrentX87ControlWord().ToString("x4")); + } TickDelegate tick = (TickDelegate)Marshal.GetDelegateForFunctionPointer(IntPtr.Add(module, TickRva), typeof(TickDelegate)); using (Fixture empty = NewFixture()) { empty.MakeDistributor(); active = empty; tick(empty.Distributor, 0.0f); @@ -335,6 +387,137 @@ internal static class BehaviorDistributorTickOracle { RunSkippedCase(tick); } + private static ushort CurrentX87ControlWord() { + if (x87ControlWordReader == null || x87ControlWordCell == IntPtr.Zero) + throw new InvalidOperationException("x87 control-word reader is not initialized"); + x87ControlWordReader(); + return unchecked((ushort)Marshal.ReadInt16(x87ControlWordCell)); + } + + private static void SetX87ControlWord(ushort value) { + if (x87ControlWordWriter == null || x87ControlWordCell == IntPtr.Zero) + throw new InvalidOperationException("x87 control-word writer is not initialized"); + Marshal.WriteInt16(x87ControlWordCell, unchecked((short)value)); + x87ControlWordWriter(); + Expect(CurrentX87ControlWord() == value, "x87 control word 0x" + value.ToString("x4")); + } + + private static void AddWithGameControl(NativeAddObject add, IntPtr distributor, uint key) { + Expect(CurrentX87ControlWord() == 0x007f, "game x87 control word before native Add"); + add(distributor, key); + Expect(CurrentX87ControlWord() == 0x007f, "game x87 control word after native Add"); + } + + private static void NormalizeWithGameControl(NativeNormalize normalize, IntPtr distributor, uint key) { + Expect(CurrentX87ControlWord() == 0x007f, "game x87 control word before native normalize"); + normalize(distributor, key); + Expect(CurrentX87ControlWord() == 0x007f, "game x87 control word after native normalize"); + } + + private static void RunNativeAddCases(IntPtr module) { + NativeAddObject add = (NativeAddObject)Marshal.GetDelegateForFunctionPointer(IntPtr.Add(module, AddObjectRva), typeof(NativeAddObject)); + using (Fixture fixture = NewFixture()) { + fixture.MakeDistributor(); + active = fixture; + AddWithGameControl(add, fixture.Distributor, 0x80000004); + Expect(Marshal.ReadInt32(fixture.Distributor, 0x20) == 1, "Add inserts a new first key"); + ExpectEntry(fixture.Entries, 0, 0x80000004, 0x3f800000, 0, 0, 0, 0, 0); + + AddWithGameControl(add, fixture.Distributor, 0x80000006); + Expect(Marshal.ReadInt32(fixture.Distributor, 0x20) == 2, "Add appends a second key"); + ExpectEntry(fixture.Entries, 0, 0x80000004, 0x3f000000, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 1, 0x80000006, 0x3f000000, 0, 0, 0, 0, 0); + + WriteEntry(fixture.Entries, 0, 0x80000004, 0.2f, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5); + AddWithGameControl(add, fixture.Distributor, 0x80000004); + Expect(Marshal.ReadInt32(fixture.Distributor, 0x20) == 2, "Add on an existing key does not append"); + Expect(fixture.VectorInsertCalls == 2, "Add inserts exactly the two new keys"); + ExpectEntry(fixture.Entries, 0, 0x80000004, 0x3f000000, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5); + ExpectEntry(fixture.Entries, 1, 0x80000006, 0x3f000000, 0, 0, 0, 0, 0); + + AddWithGameControl(add, fixture.Distributor, 0x80000008); + Expect(Marshal.ReadInt32(fixture.Distributor, 0x20) == 3, "Add appends a third key"); + Expect(fixture.VectorInsertCalls == 3, "Add inserts each new key exactly once"); + ExpectEntry(fixture.Entries, 0, 0x80000004, 0x3f000000, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5); + uint[] third = ReadEntry(IntPtr.Add(fixture.Entries, 0x38)); + Console.WriteLine("native-add-third-share: " + Float(third[1]) + " bits=" + Hex(third[1])); + Expect(third[0] == 0x80000008 && third[2] == 0 && third[3] == 0 && third[4] == 0 && third[5] == 0 && third[6] == 0, + "Add initializes the third record apart from its observed share"); + ExpectEntry(fixture.Entries, 1, 0x80000006, 0x3e2aaaa8, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 2, 0x80000008, 0x3eaaaaab, 0, 0, 0, 0, 0); + Console.WriteLine("native-add: count=3 inserts=" + fixture.VectorInsertCalls + " trace=" + String.Join(",", fixture.Trace.ToArray()) + + " entries=[" + FormatEntry(fixture.Entries) + ";" + FormatEntry(IntPtr.Add(fixture.Entries, 0x1c)) + ";" + + FormatEntry(IntPtr.Add(fixture.Entries, 0x38)) + "]"); + } + } + + private static void RunNativeNormalizeCases(IntPtr module) { + NativeNormalize normalize = (NativeNormalize)Marshal.GetDelegateForFunctionPointer(IntPtr.Add(module, NormalizeRva), typeof(NativeNormalize)); + using (Fixture fixture = NewFixture()) { + fixture.MakeDistributor(0x11, 0x22, 0x33); + active = fixture; + WriteEntry(fixture.Entries, 0, 0x11, 0.2f, 0, 0xaaaaaaaa, 0xbbbbbbbb, 0xcccccccc, 0xdddddddd); + WriteEntry(fixture.Entries, 1, 0x22, 0.3f, 1, 0x11111111, 0x22222222, 0x33333333, 0x44444444); + WriteEntry(fixture.Entries, 2, 0x33, 0.3f, 0, 0x55555555, 0x66666666, 0x77777777, 0x88888888); + NormalizeWithGameControl(normalize, fixture.Distributor, 0x11); + ExpectEntry(fixture.Entries, 0, 0x11, FloatBitsUnsigned(0.2f), 0, 0xaaaaaaaa, 0xbbbbbbbb, 0xcccccccc, 0xdddddddd); + ExpectEntry(fixture.Entries, 1, 0x22, FloatBitsUnsigned(0.3f), 1, 0x11111111, 0x22222222, 0x33333333, 0x44444444); + ExpectEntry(fixture.Entries, 2, 0x33, 0x3f000000, 0, 0x55555555, 0x66666666, 0x77777777, 0x88888888); + Console.WriteLine("native-normalize-pinned: shares=[" + Float(ReadEntry(fixture.Entries)[1]) + "," + + Float(ReadEntry(IntPtr.Add(fixture.Entries, 0x1c))[1]) + "," + + Float(ReadEntry(IntPtr.Add(fixture.Entries, 0x38))[1]) + "] flags=[0,1,0]"); + } + using (Fixture fixture = NewFixture()) { + fixture.MakeDistributor(0x41, 0x42, 0x43); + active = fixture; + WriteEntry(fixture.Entries, 0, 0x41, 0.25f, 0, 0, 0, 0, 0); + WriteEntry(fixture.Entries, 1, 0x42, 0.0f, 0, 0, 0, 0, 0); + WriteEntry(fixture.Entries, 2, 0x43, 0.0f, 0, 0, 0, 0, 0); + NormalizeWithGameControl(normalize, fixture.Distributor, 0x41); + ExpectEntry(fixture.Entries, 0, 0x41, 0x3e800000, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 1, 0x42, 0x3ec00000, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 2, 0x43, 0x3ec00000, 0, 0, 0, 0, 0); + Console.WriteLine("native-normalize-zero-free-sum: shares=[0.25,0.375,0.375]"); + } + using (Fixture fixture = NewFixture()) { + fixture.MakeDistributor(0x51, 0x52, 0x53); + active = fixture; + WriteEntry(fixture.Entries, 0, 0x51, 0.5f, 0, 0, 0, 0, 0); + WriteEntry(fixture.Entries, 1, 0x52, 1.0f, 0, 0, 0, 0, 0); + WriteEntry(fixture.Entries, 2, 0x53, 5.9604644775390625e-8f, 0, 0, 0, 0, 0); + NormalizeWithGameControl(normalize, fixture.Distributor, 0x51); + uint[] nearFirst = ReadEntry(fixture.Entries); + uint[] nearSecond = ReadEntry(IntPtr.Add(fixture.Entries, 0x1c)); + uint[] nearThird = ReadEntry(IntPtr.Add(fixture.Entries, 0x38)); + Console.WriteLine("native-normalize-near-rounding: shares=[" + Float(nearFirst[1]) + "," + Float(nearSecond[1]) + "," + Float(nearThird[1]) + "] bits=[" + Hex(nearFirst[1]) + "," + Hex(nearSecond[1]) + "," + Hex(nearThird[1]) + "]"); + ExpectEntry(fixture.Entries, 0, 0x51, 0x3f000000, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 1, 0x52, 0x3f000000, 0, 0, 0, 0, 0); + ExpectEntry(fixture.Entries, 2, 0x53, 0x33000000, 0, 0, 0, 0, 0); + } + } + + private static void WriteEntry(IntPtr entries, int index, uint key, float weight, uint pinned, + uint word3, uint word4, uint word5, uint word6) { + IntPtr entry = IntPtr.Add(entries, index * 0x1c); + Marshal.WriteInt32(entry, 0x00, unchecked((int)key)); + Marshal.WriteInt32(entry, 0x04, FloatBits(weight)); + Marshal.WriteInt32(entry, 0x08, unchecked((int)pinned)); + Marshal.WriteInt32(entry, 0x0c, unchecked((int)word3)); + Marshal.WriteInt32(entry, 0x10, unchecked((int)word4)); + Marshal.WriteInt32(entry, 0x14, unchecked((int)word5)); + Marshal.WriteInt32(entry, 0x18, unchecked((int)word6)); + } + + private static void ExpectEntry(IntPtr entries, int index, uint key, uint weight, uint pinned, + uint word3, uint word4, uint word5, uint word6) { + uint[] words = ReadEntry(IntPtr.Add(entries, index * 0x1c)); + Expect(words[0] == key && words[1] == weight && words[2] == pinned && words[3] == word3 && + words[4] == word4 && words[5] == word5 && words[6] == word6, + "native entry " + index + " fields [" + String.Join(",", Array.ConvertAll(words, Hex)) + "]"); + } + + private static uint FloatBitsUnsigned(float value) { return unchecked((uint)FloatBits(value)); } + private static Fixture NewFixture() { Fixture fixture = new Fixture(); fixture.ManagerVtable = Marshal.AllocHGlobal(0x60); fixture.Allocations.Add(fixture.ManagerVtable); Zero(fixture.ManagerVtable, 0x60); @@ -570,6 +753,29 @@ internal static class BehaviorDistributorTickOracle { Marshal.Copy(code, 0, thunk, code.Length); return thunk; } + private static IntPtr WriteThisCallThreeArgsToStdcallThunk(int offset, IntPtr stdcallTarget) { + // Adapt ECX=self plus three stack arguments to stdcall(self, arg1, arg2, arg3). + byte[] code = { 0xff, 0x74, 0x24, 0x0c, 0xff, 0x74, 0x24, 0x0c, 0xff, 0x74, 0x24, 0x0c, + 0x51, 0xb8, 0, 0, 0, 0, 0xff, 0xd0, 0xc2, 0x0c, 0x00 }; + WriteImm32(code, 14, stdcallTarget.ToInt32()); + IntPtr thunk = IntPtr.Add(fastcallThunks, offset); + Marshal.Copy(code, 0, thunk, code.Length); + return thunk; + } + private static IntPtr WriteX87ControlWordReader(int offset) { + byte[] code = { 0xd9, 0x3d, 0, 0, 0, 0, 0xc3 }; // fnstcw [absolute address]; ret + WriteImm32(code, 2, x87ControlWordCell.ToInt32()); + IntPtr thunk = IntPtr.Add(fastcallThunks, offset); + Marshal.Copy(code, 0, thunk, code.Length); + return thunk; + } + private static IntPtr WriteX87ControlWordWriter(int offset) { + byte[] code = { 0xd9, 0x2d, 0, 0, 0, 0, 0xc3 }; // fldcw [absolute address]; ret + WriteImm32(code, 2, x87ControlWordCell.ToInt32()); + IntPtr thunk = IntPtr.Add(fastcallThunks, offset); + Marshal.Copy(code, 0, thunk, code.Length); + return thunk; + } private static void WriteImm32(byte[] code, int offset, int value) { byte[] bytes = BitConverter.GetBytes(value); Buffer.BlockCopy(bytes, 0, code, offset, 4); @@ -585,7 +791,7 @@ internal static class BehaviorDistributorTickOracle { foreach (byte value in digest) hex.Append(value.ToString("x2")); return hex.ToString(); } } - private static void Expect(bool value, string message) { if (!value) throw new InvalidOperationException("original Behavior tick oracle failed: " + message); } + private static void Expect(bool value, string message) { if (!value) throw new InvalidOperationException("original Behavior oracle failed: " + message); } private static void ExpectLookupOrder(Fixture fixture, params string[] keys) { List<string> actual = new List<string>(); foreach (string item in fixture.Trace) if (item.StartsWith("lookup:", StringComparison.Ordinal)) actual.Add(item.Substring(7)); |