protected void LoadExtra(byte[] extra)
{
for (int i = 0; i < extra.Length - 4;)
{
ExtraDataType type = (ExtraDataType)BinaryPrimitives.ReadUInt16LittleEndian(extra.AsSpan(i));
if (!Enum.IsDefined(typeof(ExtraDataType), type))
{
type = ExtraDataType.NotImplementedExtraData;
}
ushort length = BinaryPrimitives.ReadUInt16LittleEndian(extra.AsSpan(i + 2));
// 7zip has this same kind of check to ignore extras blocks that don't conform to the standard 2-byte ID, 2-byte length, N-byte value.
// CPP/7Zip/Zip/ZipIn.cpp: CInArchive::ReadExtra
if (length > extra.Length)
{
// bad extras block
return;
}
byte[] data = new byte[length];
Buffer.BlockCopy(extra, i + 4, data, 0, length);
Extra.Add(LocalEntryHeaderExtraFactory.Create(type, length, data));
i += length + 4;
}
}
protected void LoadExtra(byte[] extra)
{
ushort num2;
for (int i = 0; i < (extra.Length - 4); i += num2 + 4)
{
ExtraDataType notImplementedExtraData = (ExtraDataType)BitConverter.ToUInt16(extra, i);
if (!Enum.IsDefined(typeof(ExtraDataType), notImplementedExtraData))
{
notImplementedExtraData = ExtraDataType.NotImplementedExtraData;
}
num2 = BitConverter.ToUInt16(extra, i + 2);
byte[] dst = new byte[num2];
Buffer.BlockCopy(extra, i + 4, dst, 0, num2);
this.Extra.Add(LocalEntryHeaderExtraFactory.Create(notImplementedExtraData, num2, dst));
}
}
protected void LoadExtra(byte[] extra)
{
for (int i = 0; i < extra.Length - 4;)
{
ExtraDataType type = (ExtraDataType)DataConverter.LittleEndian.GetUInt16(extra, i);
if (!Enum.IsDefined(typeof(ExtraDataType), type))
{
type = ExtraDataType.NotImplementedExtraData;
}
ushort length = DataConverter.LittleEndian.GetUInt16(extra, i + 2);
byte[] data = new byte[length];
Buffer.BlockCopy(extra, i + 4, data, 0, length);
Extra.Add(LocalEntryHeaderExtraFactory.Create(type, length, data));
i += length + 4;
}
}