CollisionCacheParser.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Cache
{
    public class CollisionCache
    {
        public byte[] IdString = {(byte) 'C', (byte) 'C', (byte) '3', (byte) 'W'};
        public uint Version;
        public uint Unknown1;
        public uint Unknown2;
        public uint FileNameTableEndOffset;
        public uint NumberOfFiles;
        public uint FileNameTableStartOffset;
        public List<string> FileNames;

        public CollisionCache(string Filename)
        {
            this.Read(new BinaryReader(new FileStream(Filename,FileMode.Open)));
        }

        public void ShowDetails()
        {
            #region MessageBox
            MessageBox.Show($"\r\nIDString:\t\t\t\t\t{new string(Encoding.ASCII.GetChars(this.IdString))}\r\nVersion:\t\t\t\t\t{this.Version}\r\nUnknown1:\t\t\t\t{this.Unknown1}\r\nUnknown2:\t\t\t\t{this.Unknown2}\r\nFilename table start:\t\t\t\t{this.FileNameTableStartOffset}\r\nFilename table end:\t\t\t\t{this.FileNameTableEndOffset}\r\nNumber of files:\t\t\t\t{this.NumberOfFiles}\r\n------------------------------------------------------------------\r\nFiles:\r\n" + FileNames.Aggregate("",(c,n) => c+= "\n" + n),
            "Collision.cache info",
            MessageBoxButtons.OK,MessageBoxIcon.Information);
            #endregion
        }

        public void Read(BinaryReader br)
        {
            if(!br.ReadBytes(4).SequenceEqual(IdString))
                throw new Exception("Invalid file!");
            this.Version = br.ReadUInt32();
            this.Unknown1 = br.ReadUInt32();
            this.Unknown2 = br.ReadUInt32();
            this.FileNameTableEndOffset = br.ReadUInt32();
            this.NumberOfFiles = br.ReadUInt32();
            this.FileNameTableStartOffset = br.ReadUInt32();
            FileNames = new List<string>();
            br.BaseStream.Seek(this.FileNameTableStartOffset, SeekOrigin.Begin);
            for (int i = 0; i < this.NumberOfFiles; i++)
            {
                this.FileNames.Add(br.ReadCR2WString());
            }
        }


    }
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            Console.Title = "Collision.cache reader test";
            var of = new OpenFileDialog();
            of.Filter = "Cache files | *.cache";
            of.Title = "Please select a witcher 3 cache file";
            if (of.ShowDialog() == DialogResult.OK)
            {
                var cc = new CollisionCache(of.FileName);
                cc.ShowDetails();
            }
            Console.ReadLine();
        }
    }

    public static class BREXT
    {
        public static string ReadCR2WString(this BinaryReader file, int len = 0)
        {
            string str = null;
            if (len > 0)
            {
                str = Encoding.Default.GetString(file.ReadBytes(len));
            }
            else
            {
                var sb = new StringBuilder();
                while (true)
                {
                    var c = (char)file.ReadByte();
                    if (c == 0)
                        break;
                    sb.Append(c);
                }
                str = sb.ToString();
            }
            return str;
        }
    }
}