internal static ZipArchiveFile Read(ZipArchive archive)
{
Stream stream = archive.fromStream;
ByteBuffer byteBuffer = new ByteBuffer(30);
int num = byteBuffer.ReadContentsFrom(stream);
if (num == 0)
{
return(null);
}
uint num1 = byteBuffer.ReadUInt32();
if (num1 != 67324752)
{
if (num1 != 33639248)
{
throw new ApplicationException("Bad ZipFile Header");
}
return(null);
}
if (byteBuffer.ReadUInt16() > 256)
{
throw new ApplicationException("Zip file requires unsupported features");
}
byteBuffer.SkipBytes(2);
ZipArchiveFile zipArchiveFile = new ZipArchiveFile(archive, null)
{
compressionMethod = (ZipArchiveFile.CompressionMethod)byteBuffer.ReadUInt16(),
lastWriteTime = ZipArchiveFile.DosTimeToDateTime(byteBuffer.ReadUInt32()),
crc32 = new uint?(byteBuffer.ReadUInt32()),
compressedLength = (void *)(checked ((int)byteBuffer.ReadUInt32())),
length = (long)byteBuffer.ReadUInt32()
};
int num2 = byteBuffer.ReadUInt16();
byte[] numArray = new byte[num2];
int num3 = stream.Read(numArray, 0, num2);
zipArchiveFile.name = Encoding.UTF8.GetString(numArray).Replace('/', Path.DirectorySeparatorChar);
archive.entries[zipArchiveFile.name] = zipArchiveFile;
if (num != byteBuffer.Length || num3 != num2 || num2 == 0 || zipArchiveFile.LastWriteTime.Ticks == (long)0)
{
throw new ApplicationException("Bad Zip File Header");
}
if (zipArchiveFile.Name.IndexOfAny(ZipArchiveFile.invalidPathChars) >= 0)
{
throw new ApplicationException("Invalid File Name");
}
if (zipArchiveFile.compressionMethod != ZipArchiveFile.CompressionMethod.None && zipArchiveFile.compressionMethod != ZipArchiveFile.CompressionMethod.Deflate)
{
throw new ApplicationException(string.Concat("Unsupported compression mode ", zipArchiveFile.compressionMethod));
}
if (!archive.IsReadOnly || !stream.CanSeek)
{
zipArchiveFile.compressedData = new byte[zipArchiveFile.compressedLength];
stream.Read(zipArchiveFile.compressedData, 0, zipArchiveFile.compressedLength);
}
else
{
zipArchiveFile.positionOfCompressedDataInArchive = archive.fromStream.Position;
stream.Seek((long)zipArchiveFile.compressedLength, SeekOrigin.Current);
}
return(zipArchiveFile);
}
