[PATCH v3 0/5] cleanup duplicate name_compare() functions

[Jeremiah Mahler <jmmahler@gmail.com>]

Version 3 of the patch series to cleanup duplicate name_compare()
functions (previously was 'add strnncmp() function' [1]).  

This version goes in a slightly different direction than the previous
version.  Before I was trying to add a strnncmp() function so I could
remove duplicate copies of the name_compare() function in tree-walk.c
and unpack-trees.c.  But then Torsten Bögershausen pointed out that
there is a cache_name_compare() function which is nearly identical to
name_compare() [2]*.

* cache_name_compare() is not identical to name_compare().  The former
  returns +1, -1, whereas the latter returns +N, -N.  But there is no
  place where name_compare() was used that needed the magnitude so this
  change would not alter its behavior.

So I decided why not generalize the name of cache_name_compare() by
renaming it to  name_compare(), since it doesn't do anything with
caches, other than being part of cache.h and read-cache.c.  Then the
duplicate name_compare() functions can be removed and the few places
that used cache_name_compare() can be renamed to name_compare().

It cleans up the code with a minimal number of changes.  It keeps
existing functions instead of creating new ones.  And there are several
other functions in cache.h that are similarly named '*name_compare' so
it follows the already established style.

Also, the name_compare() now uses memcmp() as it did originally instead
of using strncmp() as it did in the last version.

[1]: http://marc.info/?l=git&m=140299051431479&w=2

[2]: http://marc.info/?l=git&m=140300329403706&w=2

Jeremiah Mahler (5):
  cache: rename cache_name_compare() to name_compare()
  tree-walk.c: remove name_compare() function
  unpack-trees.c: remove name_compare() function
  dir.c: rename to name_compare()
  name-hash.c: rename to name_compare()

 cache.h        |  2 +-
 dir.c          |  3 +--
 name-hash.c    |  2 +-
 read-cache.c   | 23 +++++++++++++----------
 tree-walk.c    | 10 ----------
 unpack-trees.c | 11 -----------
 6 files changed, 16 insertions(+), 35 deletions(-)

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2.0.0