Function SzAr_DecodeFolder 

pub unsafe extern "C" fn SzAr_DecodeFolder(
    p: *const CSzAr,
    folderIndex: UInt32,
    stream: ILookInStreamPtr,
    startPos: UInt64,
    outBuffer: *mut Byte,
    outSize: usize,
    allocMain: ISzAllocPtr,
) -> SRes