Coplt.Mar 0.2.0

dotnet add package Coplt.Mar --version 0.2.0
                    
NuGet\Install-Package Coplt.Mar -Version 0.2.0
                    
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Coplt.Mar" Version="0.2.0" />
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="Coplt.Mar" Version="0.2.0" />
                    
Directory.Packages.props
<PackageReference Include="Coplt.Mar" />
                    
Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.
paket add Coplt.Mar --version 0.2.0
                    
#r "nuget: Coplt.Mar, 0.2.0"
                    
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
#:package Coplt.Mar@0.2.0
                    
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.
#addin nuget:?package=Coplt.Mar&version=0.2.0
                    
Install as a Cake Addin
#tool nuget:?package=Coplt.Mar&version=0.2.0
                    
Install as a Cake Tool

Coplt.Mar

Nuget

Memory mapped ARchiver format

  • Random Access
  • No compression
  • No hash verification (CRC SHA ...)
  • Get ReadOnlySpan<byte> directly through memory mapping

Detail

File layout:

<Head> <Version> <Data> <Data> ... <Manifest> <Tail>
  • Head

    "\0MAR📦" in utf8, 📦 is emoji
    00 4D 41 52 F0 9F 93 A6

  • Version

    (int Major, int Minor, int Patch) ser by MsgPack
    It is the format version, not the library version
    0.1.0 is 93 00 01 00

  • Data

    Just simply bytes

  • Manifest

    Dictionary<string, (ulong Offset, ulong Size)> ser by MsgPack

  • Tail

    Little endian uint manifest size

Usage

{
    await using var builder = await MarBuilder.CreateAsync("./test.mar");
    await builder.AddFileAsync("test.txt", "Hello, World!");
    // await builder.AddFileAsync("test.txt", "Hello, World!", Encoding.Utf16); // Specify encoding
    await builder.AddFileAsync("some.bin", new byte[] { 1, 2, 3, 4, 5 });
    // await builder.AddFileAsync("test.txt", SomeStream);
}

{
    using var mar = MarArchive.Open("./test.mar");
    
    mar.TryGetString("test.txt", out string data);
    Console.WriteLine(data);
    // Output: Hello, World!
    
    mar.TryGet("test.txt", out ReadOnlySpan<byte> span);
    Console.WriteLine(string.Join(", ", span.ToArray()));
    // Output: 1, 2, 3, 4, 5
    
    Console.WriteLine(mar.TryGet("asd", out _));
    // Output: False
}
Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
0.2.0 84 6/7/2025
0.1.0 104 6/6/2025