add: Md5SumJ

Md5SumJ/Md5SumJ.csproj

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

Md5SumJ/Program.cs

@@ -0,0 +1,40 @@
+using System.IO.Enumeration;
+using System.Security.Cryptography;
+
+if (args.Length < 1)
+{
+    Console.WriteLine("Usage: Md5SumJ <dir-tree-to-checksum> [parallel:default same to vCpu]");
+    return -1;
+}
+
+var dirToCheckSum = args[0];
+
+var threads = Environment.ProcessorCount;
+if (args.Length > 1 && ushort.TryParse(args[1], out var t)) threads = t;
+
+var files = new FileSystemEnumerable<string>(dirToCheckSum, (ref FileSystemEntry p) => p.ToFullPath(),
+        new EnumerationOptions { RecurseSubdirectories = true, })
+{ ShouldIncludePredicate = (ref FileSystemEntry p) => p.IsDirectory == false };
+
+Parallel.ForEach(files,
+    new ParallelOptions { MaxDegreeOfParallelism = threads },
+    f =>
+    {
+        try
+        {
+            Console.WriteLine($"{MakeMd5FromFilePath(f)}   {f} | by thread#{Environment.CurrentManagedThreadId}");
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine($"Err: {e.Message}");
+        }
+    });
+
+return 0;
+
+static string MakeMd5FromFilePath(string filePath)
+{
+    using var fs = File.OpenRead(filePath);
+    var md5 = MD5.HashData(fs);
+    return Convert.ToHexString(md5);
+}

StrangeTools.sln

@@ -92,7 +92,9 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "RealtimeSpeedTest", "Realti
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RealtimeSpeedTest.ConsolePoc", "RealtimeSpeedTest.ConsolePoc\RealtimeSpeedTest.ConsolePoc.csproj", "{F395AFAC-DE4B-4EA7-930E-65F5CC2FE763}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "IpAddressExpander", "IpAddressExpander\IpAddressExpander.csproj", "{35EA784A-C4B9-473B-B1CD-86AA363FEB31}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IpAddressExpander", "IpAddressExpander\IpAddressExpander.csproj", "{35EA784A-C4B9-473B-B1CD-86AA363FEB31}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Md5SumJ", "Md5SumJ\Md5SumJ.csproj", "{24A2F016-012E-4B49-9F13-377E05B5D037}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -252,6 +254,10 @@ Global
 		{35EA784A-C4B9-473B-B1CD-86AA363FEB31}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{35EA784A-C4B9-473B-B1CD-86AA363FEB31}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{35EA784A-C4B9-473B-B1CD-86AA363FEB31}.Release|Any CPU.Build.0 = Release|Any CPU
+		{24A2F016-012E-4B49-9F13-377E05B5D037}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{24A2F016-012E-4B49-9F13-377E05B5D037}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{24A2F016-012E-4B49-9F13-377E05B5D037}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{24A2F016-012E-4B49-9F13-377E05B5D037}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -298,6 +304,7 @@ Global
 		{CBD862C8-490D-4612-809E-ACDF4E4B2306} = {3120ADE6-C606-42F1-9AA8-B7F1A8933CD7}
 		{F395AFAC-DE4B-4EA7-930E-65F5CC2FE763} = {CBD862C8-490D-4612-809E-ACDF4E4B2306}
 		{35EA784A-C4B9-473B-B1CD-86AA363FEB31} = {3120ADE6-C606-42F1-9AA8-B7F1A8933CD7}
+		{24A2F016-012E-4B49-9F13-377E05B5D037} = {3120ADE6-C606-42F1-9AA8-B7F1A8933CD7}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {017A8C58-F476-47E7-9CBE-077A98A76AB4}