private static string DeserializePayload(Core.Utility.BinaryReader reader)
{
var payloadSize = (int)reader.BaseStream.Length;
var bytes = reader.ReadBytes(payloadSize);
var payload = System.Text.Encoding.UTF8.GetString(bytes);
return(payload);
}
private static void CheckHeader(Core.Utility.BinaryReader reader, ref int bytesRead)
{
var identifier = reader.ReadBytes(MagicIdentifier.Length);
bytesRead += identifier.Length;
if (!identifier.SequenceEqual(MagicIdentifier))
{
throw new InvalidOperationException(Resources.Strings.GZipHeaderError_InvalidMagic);
}
}
/// <summary>
/// Deserializes the payload.
/// </summary>
/// <param name="reader">The binary reader containing the data to deserialize to create the object.</param>
/// <returns>The number of bytes deserialized.</returns>
/// <remarks>The default implementation merely validates that the payload is correct. Specific subclasses may override this implementation if
/// any specific data from the payload is desired.</remarks>
/// <exception cref="System.IO.EndOfStreamException">Thrown if the data stream does not contain enough data as specified by payload length.</exception>
/// <exception cref="System.IO.InvalidDataException">Thrown if the payload checksum differs from the expected checksum.</exception>
protected virtual int DeserializePayload(Core.Utility.BinaryReader reader)
{
var payload = reader.ReadBytes(Length);
if (payload.Length < Length)
{
throw new System.IO.EndOfStreamException();
}
ValidatePayloadCrc(payload);
return(Length);
}
private void ValidateHeaderCrc(Core.Utility.BinaryReader reader, int bytesRead)
{
reader.BaseStream.Seek(-bytesRead, System.IO.SeekOrigin.Current);
var data = reader.ReadBytes(bytesRead - 1);
var crc8 = Crc8.OfBlock(data);
reader.BaseStream.Seek(bytesRead, System.IO.SeekOrigin.Begin);
if (crc8 != Crc)
{
throw new System.IO.InvalidDataException(string.Format(CultureInfo.CurrentCulture, Resources.Strings.InvalidDataBlockChecksumFormat, crc8, Crc));
}
}
/// <inheritdoc />
public override int Deserialize(Core.Utility.BinaryReader reader)
{
var header = reader.ReadBytes(MagicKey.Length);
var bytesRead = header.Length;
if (!header.SequenceEqual(MagicKey))
{
throw new INTV.Core.UnexpectedFileTypeException("LUIGI");
}
Version = reader.ReadByte();
bytesRead += sizeof(byte);
if (Version > LuigiFileHeader.CurrentVersion)
{
// Perhaps throwing here is a bad idea...
throw new System.InvalidOperationException(string.Format(System.Globalization.CultureInfo.CurrentCulture, Resources.Strings.UnsupportedLuigiVersion_Format, Version));
}
Features = (LuigiFeatureFlags)reader.ReadUInt64();
bytesRead += sizeof(LuigiFeatureFlags);
if (Version > 0)
{
Features2 = (LuigiFeatureFlags2)reader.ReadUInt64();
bytesRead += sizeof(LuigiFeatureFlags2);
var uidBytes = reader.ReadBytes(VersionOneUidSize);
if (uidBytes.Length < sizeof(ulong))
{
throw new System.IO.EndOfStreamException();
}
Uid = BitConverter.ToUInt64(uidBytes, 0);
bytesRead += sizeof(ulong);
var originalFormatKey = uidBytes.Skip(OriginalRomCrc32Size).Take(OriginalRomKeySize);
var originalCrcData = uidBytes.Take(OriginalRomCrc32Size).ToArray();
if (originalFormatKey.SequenceEqual(RomKey))
{
OriginalRomFormat = RomFormat.Rom;
OriginalRomCrc32 = BitConverter.ToUInt32(originalCrcData, 0);
}
else
{
OriginalRomFormat = RomFormat.Bin;
OriginalRomCrc32 = BitConverter.ToUInt32(originalCrcData, 0);
if (!originalFormatKey.SequenceEqual(BinKey))
{
OriginalCfgCrc32 = BitConverter.ToUInt32(originalFormatKey.ToArray(), 0);
}
}
}
Reserved = reader.ReadBytes(ReservedHeaderBytesSize);
bytesRead += ReservedHeaderBytesSize;
Crc = reader.ReadByte();
bytesRead += HeaderChecksumSize;
ValidateHeaderBytesRead(bytesRead);
ValidateHeaderCrc(reader, bytesRead);
_deserializeByteCount = bytesRead;
return(bytesRead);
}
