public static PAKArchive ReadNew(Stream baseStream)
{
if (!baseStream.CanRead || !baseStream.CanSeek)
{
throw new InvalidDataException("PAKArchive stream has to be readable and seekable");
}
PAKArchive archive = new PAKArchive(baseStream);
using BinaryReader reader = new BinaryReader(baseStream, Encoding.UTF8, leaveOpen: true);
if (reader.ReadUInt32() != 0)
{
throw new InvalidDataException("Invalid PAKArchive magic (has to be 0x00000000)");
}
uint count = reader.ReadUInt32();
for (uint i = 0; i < count; i++)
{
PAKArchiveEntry entry = PAKArchiveEntry.ReadNew(reader);
string key = getPathKey(entry.path);
archive.entries[key] = entry;
var parent = entry.path.Parent?.WithoutDirectoryMarker();
while (parent?.StaysInbound ?? false)
{
archive.directories[getPathKey(parent)] = parent;
parent = parent.Parent?.WithoutDirectoryMarker();
}
}
archive.baseOffset = (UInt32)baseStream.Position;
return(archive);
}
public Stream ReadFile(string pathString)
{
string pathKey = getPathKey(new FilePath(pathString));
PAKArchiveEntry entry = entries[pathKey];
stream.Position = baseOffset + entry.offset;
return(new RangeStream(stream, entry.length, false, false));
}