D2057: translate base85.c into rust code

[Ivzhh (Sheng Mao)]

Ivzhh added a comment.


  I am open to the three-crates plan. Oirginally I have hgcli and hgext separately, and I was planning to replace CFFI. I am a pypy user too, so I will be willing to provide a python C API free crate for pypy and others.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2057

To: Ivzhh, #hg-reviewers
Cc: indygreg, durin42, kevincox, mercurial-devel