public Packfile(string archivePath, FileMode mode = FileMode.Open)
{
if (mode == FileMode.Open)
{
ArchiveFileHandle = File.Open(archivePath, mode, FileAccess.Read, FileShare.Read);
using (var reader = new BinaryReader(ArchiveFileHandle, Encoding.UTF8, true))
{
Header = PackfileHeader.FromData(reader);
if (Header.Magic != PackfileHeader.HardcodedMagic)
{
throw new InvalidDataException("Unknown header magic");
}
FileEntries = new FileEntry[Header.FileEntryCount];
BlockEntries = new BlockEntry[Header.BlockEntryCount];
for (uint i = 0; i < FileEntries.Length; i++)
{
FileEntries[i] = FileEntry.FromData(reader);
}
for (uint i = 0; i < BlockEntries.Length; i++)
{
BlockEntries[i] = BlockEntry.FromData(reader);
}
}
}
else if (mode == FileMode.Create || mode == FileMode.CreateNew)
{
throw new NotImplementedException("Writing archives is not supported at the moment");
}
else
{
throw new NotImplementedException("Archive file mode must be Open, Create, or CreateNew");
}
}
/// <summary>
/// Open an archive (.bin) file and prepare for reading
/// </summary>
/// <param name="archivePath">Disk path</param>
public PackfileReader(string archivePath)
{
_fileHandle = CreateReadStream(archivePath);
using var reader = new BinaryReader(_fileHandle, Encoding.UTF8, true);
Header = PackfileHeader.FromData(reader);
_fileEntries = new List <FileEntry>((int)Header.FileEntryCount);
_blockEntries = new List <BlockEntry>(Header.BlockEntryCount);
Span <byte> fileData = reader.ReadBytesStrict((int)Header.FileEntryCount * FileEntry.DataHeaderSize);
Span <byte> blockData = reader.ReadBytesStrict(Header.BlockEntryCount * BlockEntry.DataHeaderSize);
for (int i = 0; i < (int)Header.FileEntryCount; i++)
{
var data = fileData.Slice(i * FileEntry.DataHeaderSize);
_fileEntries.Add(FileEntry.FromData(data, Header));
}
for (int i = 0; i < Header.BlockEntryCount; i++)
{
var data = blockData.Slice(i * BlockEntry.DataHeaderSize);
_blockEntries.Add(BlockEntry.FromData(data, Header));
}
}