/// <summary>
/// Decompression using a run length encoding algorithm.
/// See MS-OVBA Section 2.4
/// </summary>
/// <param name="part">Byte array to decompress</param>
/// <param name="startPos"></param>
/// <returns></returns>
internal static byte[] DecompressPart(byte[] part, int startPos)
{
if (part[startPos] != 1)
{
return(null);
}
using (var ms = RecyclableMemory.GetStream(4096))
{
int compressPos = startPos + 1;
while (compressPos < part.Length - 1)
{
DecompressChunk(ms, part, ref compressPos);
}
return(ms.ToArray());
}
}