/// <summary>
/// Reads from a .ppx file.
/// </summary>
/// <param name="Filename">The filename of the .ppx file.</param>
protected void ReadFromFile(string Filename)
{
this.Filename = Filename;
using (FileStream arc = new FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.Read))
using (BinaryReader reader = new BinaryReader(arc))
{
string magic = Encoding.ASCII.GetString(reader.ReadBytes(4));
//Check magic
if (Magic != magic)
{
throw new PpexException("Supplied file is not an extended PP archive.", PpexException.PpexErrorCode.FileNotPPXArchive);
}
//Check version
ushort version = reader.ReadUInt16();
if (version != Version)
{
throw new PpexException($"Supplied extended PP archive is of version {version}; was expecting version {Version}", PpexException.PpexErrorCode.IncorrectVersionNumber);
}
//Read the title
ushort strlen = reader.ReadUInt16();
Title = Encoding.Unicode.GetString(reader.ReadBytes((int)strlen));
//Read chunk and file headers
TableInfoOffset = (ulong)arc.Position;
ChunkTableOffset = reader.ReadUInt64();
FileTableOffset = reader.ReadUInt64();
reader.BaseStream.Position = (long)ChunkTableOffset;
uint number = reader.ReadUInt32();
for (int i = 0; i < number; i++)
{
var chunk = ExtendedArchiveChunk.ReadFromTable(reader, this);
chunks.Add(chunk);
}
reader.BaseStream.Position = (long)FileTableOffset;
number = reader.ReadUInt32();
for (int i = 0; i < number; i++)
{
var source = ArchiveFileSource.ReadFromTable(reader, this);
RawFiles.Add(source);
Files.Add(new ArchiveSubfile(source));
}
}
}
internal static ExtendedArchiveChunk ReadFromTable(BinaryReader reader, ExtendedArchive archive)
{
ExtendedArchiveChunk chunk = new ExtendedArchiveChunk();
chunk.baseArchive = archive;
chunk.ID = reader.ReadUInt32();
chunk.Compression = (ArchiveChunkCompression)reader.ReadByte();
chunk.CRC32 = reader.ReadUInt32();
chunk.Offset = reader.ReadUInt64();
chunk.CompressedLength = reader.ReadUInt64();
chunk.UncompressedLength = reader.ReadUInt64();
return(chunk);
}