Sparse file support

It appears that your streaming cpio parser does not support sparse files. Am I mistaken?

If it helps, GNU tar implements sparse support using:
http://git.savannah.gnu.org/cgit/tar.git/tree/src/sparse.c?id=63f2e969ddc162da7ae49a955bba9c6a2a0e77dc#n354

My question is relevant to this:
http://stackoverflow.com/questions/40166300/cross-platform-sparse-file-compression-with-nodejs

Start by examining the streaming cpio parser and the GNU tar sparse.c implementation linked in the issue to understand the relevant sparse-file format and parser boundaries. Define what parser and packer support should mean for sparse files, then verify that sparse archives are handled without losing their sparse structure.

Written by the indexing model from the issue text.