SourceEngine.Bsp

A library to calculate a CRC32 checksum for a BSP file. BSP versions 19 to 21 are supported.

The checksum is a concatenation of all lumps in the BSP except for the entities lump; it is not merely a checksum of the entire content file. This is the same algorithm the Source Engine server uses to verify a client's map. For CS:GO, a map's CRC can be found in the ServerInfo network message as map_crc.

Example

using System;
using System.IO;

using SourceEngine.Bsp;

class Program
{
    static void Main(string[] args)
    {
        using FileStream stream = File.OpenRead("map.bsp");
        uint crc = BspCrc32.Compute(stream);
        Console.WriteLine($"Crc is {crc}");
    }
}

Releases

For every release, the package is automatically published to the NuGet gallery at nuget.org.

Creating a Release

Update the version number in Directory.Build.props and commit the change. Then, create a tag with git. It is recommended to use annotated tags:

git tag -a v3.5.0 -m 'A brief description of the release'

Note that CI enforces SemVer 2.0.0 format compliance as well as the versions in the tag and the project being equal.

Finally, push the tag along with the commit for the version bump:

git push --follow-tags