update

minitool1.sln

@@ -1,10 +1,12 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.12.35506.116 d17.12
+VisualStudioVersion = 17.12.35506.116
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "minitool1", "minitool1\minitool1.csproj", "{D66AD932-3282-4BF4-9F84-E9AC9C84DE0B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "minitool2", "minitool2\minitool2.csproj", "{0FE5458A-A3A9-4D0B-A540-BF4A7CD3F7EA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{D66AD932-3282-4BF4-9F84-E9AC9C84DE0B}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D66AD932-3282-4BF4-9F84-E9AC9C84DE0B}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D66AD932-3282-4BF4-9F84-E9AC9C84DE0B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0FE5458A-A3A9-4D0B-A540-BF4A7CD3F7EA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0FE5458A-A3A9-4D0B-A540-BF4A7CD3F7EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0FE5458A-A3A9-4D0B-A540-BF4A7CD3F7EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0FE5458A-A3A9-4D0B-A540-BF4A7CD3F7EA}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

minitool2/Program.cs

@@ -0,0 +1,100 @@
+namespace minitool2
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            if (args.Length == 0)
+            {
+                Console.WriteLine("Usage: minitool2 <file.arc>");
+                return;
+            }
+
+            string filePath = args[0];
+
+            if (!File.Exists(filePath))
+            {
+                Console.WriteLine("文件不存在");
+                Console.ReadKey();
+                return;
+            }
+
+            if (Path.GetExtension(filePath).ToLower() != ".arc")
+            {
+                Console.WriteLine("文件后缀不正确");
+                Console.ReadKey();
+                return;
+            }
+
+            byte[] fileHeader = "@ARCH000"u8.ToArray();
+            byte[] unityFsHeader = [0x55, 0x6E, 0x69, 0x74, 0x79, 0x46, 0x53, 0x00, 0x00, 0x00, 0x00];
+
+            using FileStream fs = new(filePath, FileMode.Open, FileAccess.Read);
+            byte[] buffer = new byte[fileHeader.Length];
+            fs.Read(buffer, 0, buffer.Length);
+
+            for (int i = 0; i < fileHeader.Length; i++)
+            {
+                if (buffer[i] != fileHeader[i])
+                {
+                    Console.WriteLine("文件头不符合规则");
+                    Console.ReadKey();
+                    return;
+                }
+            }
+
+            List<long> positions = [];
+            long position = 0;
+            int bytesRead;
+            buffer = new byte[unityFsHeader.Length];
+
+            while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) == buffer.Length)
+            {
+                bool match = true;
+                for (int j = 0; j < unityFsHeader.Length; j++)
+                {
+                    if (buffer[j] != unityFsHeader[j])
+                    {
+                        match = false;
+                        break;
+                    }
+                }
+                if (match)
+                {
+                    positions.Add(position);
+                }
+                position += 1;
+                fs.Seek(position, SeekOrigin.Begin);
+            }
+
+            if (positions.Count == 0)
+            {
+                Console.WriteLine("未找到任何UnityFS块");
+                Console.ReadKey();
+                return;
+            }
+
+            string outputDir = Path.Combine(Directory.GetCurrentDirectory(), "output");
+            Directory.CreateDirectory(outputDir);
+
+            for (int i = 0; i < positions.Count; i++)
+            {
+                long start = positions[i];
+                long end = (i + 1 < positions.Count) ? positions[i + 1] : fs.Length;
+                long length = end - start;
+
+                fs.Seek(start, SeekOrigin.Begin);
+                buffer = new byte[length];
+                fs.Read(buffer, 0, buffer.Length);
+
+                string outputFilePath = Path.Combine(outputDir, $"{(i + 1).ToString("D5")}.assets");
+                File.WriteAllBytes(outputFilePath, buffer);
+
+                Console.Write($"\r进度: {((i + 1) * 100 / positions.Count)}%");
+            }
+
+            Console.WriteLine("提取完成");
+            Console.ReadKey();
+        }
+    }
+}

minitool2/minitool2.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>