dirstate-item: introduce low level C function...
dirstate-item: introduce low level C function
Since a lot of logic is about to change, we need to isolate it into bits that
are easy reusable in the rest of the C code.
Especially we need to split the part that do the pure logic from the part that
do the Python wrapping.
Differential Revision:
https://phab.mercurial-scm.org/D11386
