public static List <string> GetFilenames(this Ird ird)
{
using (var decompressedStream = new MemoryStream())
{
using (var compressedStream = new MemoryStream(ird.Header, false))
using (var gzip = new GZipStream(compressedStream, CompressionMode.Decompress))
gzip.CopyTo(decompressedStream);
decompressedStream.Seek(0, SeekOrigin.Begin);
var reader = new CDReader(decompressedStream, true, true);
return(reader.GetFiles(reader.Root.FullName, "*.*", SearchOption.AllDirectories).Distinct().Select(n => n.TrimStart('\\').Replace('\\', '/').TrimEnd('.')).ToList());
}
}
public static Ird Parse(byte[] content)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
if (content.Length < 200)
{
throw new ArgumentException("Data is too small to be a valid IRD structure", nameof(content));
}
if (BitConverter.ToInt32(content, 0) != Ird.Magic)
{
using var compressedStream = new MemoryStream(content, false);
using var gzip = new GZipStream(compressedStream, CompressionMode.Decompress);
using var decompressedStream = ApiConfig.MemoryStreamManager.GetStream();
gzip.CopyTo(decompressedStream);
content = decompressedStream.ToArray();
}
if (BitConverter.ToInt32(content, 0) != Ird.Magic)
{
throw new FormatException("Not a valid IRD file");
}
var result = new Ird();
using var stream = new MemoryStream(content, false);
using var reader = new BinaryReader(stream, Encoding.UTF8);
reader.ReadInt32(); // magic
result.Version = reader.ReadByte();
result.ProductCode = Encoding.ASCII.GetString(reader.ReadBytes(9));
result.TitleLength = reader.ReadByte();
result.Title = Encoding.UTF8.GetString(reader.ReadBytes(result.TitleLength));
result.UpdateVersion = Encoding.ASCII.GetString(reader.ReadBytes(4)).Trim();
result.GameVersion = Encoding.ASCII.GetString(reader.ReadBytes(5)).Trim();
result.AppVersion = Encoding.ASCII.GetString(reader.ReadBytes(5)).Trim();
if (result.Version == 7)
{
result.Id = reader.ReadInt32();
}
result.HeaderLength = reader.ReadInt32();
result.Header = reader.ReadBytes(result.HeaderLength);
result.FooterLength = reader.ReadInt32();
result.Footer = reader.ReadBytes(result.FooterLength);
result.RegionCount = reader.ReadByte();
result.RegionMd5Checksums = new List <byte[]>(result.RegionCount);
for (var i = 0; i < result.RegionCount; i++)
{
result.RegionMd5Checksums.Add(reader.ReadBytes(16));
}
result.FileCount = reader.ReadInt32();
result.Files = new List <IrdFile>(result.FileCount);
for (var i = 0; i < result.FileCount; i++)
{
var file = new IrdFile();
file.Offset = reader.ReadInt64();
file.Md5Checksum = reader.ReadBytes(16);
result.Files.Add(file);
}
result.Unknown = reader.ReadInt32();
if (result.Version == 9)
{
result.Pic = reader.ReadBytes(115);
}
result.Data1 = reader.ReadBytes(16);
result.Data2 = reader.ReadBytes(16);
if (result.Version < 9)
{
result.Pic = reader.ReadBytes(115);
}
result.Uid = reader.ReadInt32();
var dataLength = reader.BaseStream.Position;
result.Crc32 = reader.ReadUInt32();
var crc32 = Crc32Algorithm.Compute(content, 0, (int)dataLength);
if (result.Crc32 != crc32)
{
throw new InvalidDataException($"Corrupted IRD data, expected {result.Crc32:x8}, but was {crc32:x8}");
}
return(result);
}
