internal bool LoadLocalHeaderExtraFieldAndCompressedBytesIfNeeded()
{
if (_originallyInArchive)
{
_archive.ArchiveStream.Seek(_offsetOfLocalHeader, SeekOrigin.Begin);
_lhUnknownExtraFields = ZipLocalFileHeader.GetExtraFields(_archive.ArchiveReader);
}
if (!_everOpenedForWrite && _originallyInArchive)
{
_compressedBytes = new byte[_compressedSize];
_archive.ArchiveStream.Seek(OffsetOfCompressedData, SeekOrigin.Begin);
ZipHelper.ReadBytes(_archive.ArchiveStream, _compressedBytes, (int)_compressedSize);
}
return(true);
}
private bool IsOpenable(bool needToUncompress, bool needToLoadIntoMemory, out string message)
{
message = null;
if (_originallyInArchive)
{
if ((needToUncompress && (CompressionMethod != CompressionMethodValues.Stored)) && (CompressionMethod != CompressionMethodValues.Deflate))
{
message = Messages.UnsupportedCompression;
return(false);
}
if (_diskNumberStart != _archive.NumberOfThisDisk)
{
message = Messages.SplitSpanned;
return(false);
}
if (_offsetOfLocalHeader > _archive.ArchiveStream.Length)
{
message = Messages.LocalFileHeaderCorrupt;
return(false);
}
_archive.ArchiveStream.Seek(_offsetOfLocalHeader, SeekOrigin.Begin);
if (!ZipLocalFileHeader.TrySkipBlock(_archive.ArchiveReader))
{
message = Messages.LocalFileHeaderCorrupt;
return(false);
}
if ((OffsetOfCompressedData + _compressedSize) > _archive.ArchiveStream.Length)
{
message = Messages.LocalFileHeaderCorrupt;
return(false);
}
if (needToLoadIntoMemory && (_compressedSize > 0x7fffffffL))
{
message = Messages.EntryTooLarge;
return(false);
}
}
return(true);
}