Simplify topo-sort logic

.. by not using quite so much indirection.

This currently grows the "struct commit" a bit, which could be avoided by
using a union for "util" and "indegree" (the topo-sort used to use "util"
anyway, so you cannot use them together), but for now the goal of this was
to simplify, not optimize.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 19 deletions

diff --git a/commit.h b/commit.h
index 13b5372..4ed0c1c 100644
--- a/commit.h
+++ b/commit.h
@@ -14,6 +14,7 @@ struct commit_list {
 struct commit {
 	struct object object;
 	void *util;
+	unsigned int indegree;
 	unsigned long date;
 	struct commit_list *parents;
 	struct tree *tree;
@@ -84,31 +85,12 @@ void clear_commit_marks(struct commit *commit, unsigned int mark);
 /*
  * Performs an in-place topological sort of list supplied.
  *
- * Pre-conditions for sort_in_topological_order:
- *   all commits in input list and all parents of those
- *   commits must have object.util == NULL
- *
- * Pre-conditions for sort_in_topological_order_fn:
- *   all commits in input list and all parents of those
- *   commits must have getter(commit) == NULL
- *
- * Post-conditions:
  *   invariant of resulting list is:
  *      a reachable from b => ord(b) < ord(a)
  *   in addition, when lifo == 0, commits on parallel tracks are
  *   sorted in the dates order.
  */
-
-typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
-typedef void* (*topo_sort_get_fn_t)(struct commit*);
-
-void topo_sort_default_setter(struct commit *c, void *data);
-void *topo_sort_default_getter(struct commit *c);
-
 void sort_in_topological_order(struct commit_list ** list, int lifo);
-void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
-				  topo_sort_set_fn_t setter,
-				  topo_sort_get_fn_t getter);
 
 struct commit_graft {
 	unsigned char sha1[20];