/// <summary>
/// Read the header of a file in the PAK <see cref="BinaryReader"/>.
/// After Read(), stream points to the start of the compressed data.
/// </summary>
/// <param name="br">PAK <see cref="BinaryReader"/></param>
/// <returns></returns>
public static PakFileEntry Read(BinaryReader br)
{
var result = new PakFileEntry();
result.signature1 = br.ReadUInt16();
result.signature2 = br.ReadUInt16();
result.extractVersion = br.ReadUInt16();
result.flags = br.ReadUInt16();
result.compressionMethod = br.ReadUInt16();
result.time = br.ReadUInt16();
result.date = br.ReadUInt16();
result.crc = br.ReadUInt32();
result.compressedSize = br.ReadUInt32();
result.uncompressedSize = br.ReadUInt32();
result.filenameLength = br.ReadUInt16();
result.extraFieldLength = br.ReadUInt16();
result.filename = PakUtil.ReadFilename(br, result.filenameLength);
if (result.signature1 != PakConstants.PAK_SIGNATURE1 ||
result.signature2 != PakConstants.PAK_SIGNATURE2_FILE)
{
if (result.signature1 != PakConstants.ZIP_SIGNATURE1 ||
result.signature2 != PakConstants.ZIP_SIGNATURE2_FILE)
{
throw new InvalidOperationException("bad file signature");
}
}
if (result.extraFieldLength != 0)
{
throw new InvalidOperationException("extra field not supported");
}
return(result);
}
/// <summary>
/// Read the file chunk from specified <see cref="BinaryReader"/>.
/// </summary>
/// <param name="br">PAK <see cref="BinaryReader"/></param>
/// <returns></returns>
public static PakCentralDirFile Read(BinaryReader br)
{
PakCentralDirFile result = new PakCentralDirFile
{
signature1 = br.ReadUInt16(),
signature2 = br.ReadUInt16(),
createVersion = br.ReadUInt16(),
extractVersion = br.ReadUInt16(),
flags = br.ReadUInt16(),
compressionMethod = br.ReadUInt16(),
time = br.ReadUInt16(),
date = br.ReadUInt16(),
crc = br.ReadUInt32(),
compressedSize = br.ReadUInt32(),
uncompressedSize = br.ReadUInt32(),
filenameLength = br.ReadUInt16(),
extraFieldLength = br.ReadUInt16(),
fileCommentLength = br.ReadUInt16(),
diskNumStart = br.ReadUInt16(),
internalFileAttr = br.ReadUInt16(),
externalFileAttr = br.ReadUInt32(),
localHeaderOffset = br.ReadUInt32()
};
result.filename = PakUtil.ReadFilename(br, result.filenameLength);
if (result.signature1 == PakConstants.PAK_SIGNATURE1 &&
result.signature2 == PakConstants.PAK_SIGNATURE2_DIR)
{
result.isAionFormat = true;
}
else
{
if (result.signature1 != PakConstants.ZIP_SIGNATURE1 ||
result.signature2 != PakConstants.ZIP_SIGNATURE2_DIR)
{
throw new InvalidOperationException("bad central dir signature");
}
}
if (result.extraFieldLength != 0)
{
br.ReadBytes(result.extraFieldLength);
}
if (result.fileCommentLength != 0)
{
throw new InvalidOperationException("file comment not supported");
}
if (result.diskNumStart != 0)
{
throw new InvalidOperationException("disk num not supported");
}
return(result);
}
/// <summary> /// Get a specific file from the loaded PAK files. /// </summary> /// <param name="filename">File name</param> /// <returns></returns> public byte[] GetFile(string filename) => PakReaderSlim.ReadFileBytes(Files[PakUtil.NormalizeFilename(filename)]);