Add git_tree_entry_cmp and git_tree_entry_icmp

This adds a new external API git_tree_entry_cmp and a new internal
API git_tree_entry_icmp for sorting tree entries.  The case
insensitive one is internal only because general users should
never be seeing case-insensitively sorted trees.

1 files changed, 9 insertions, 0 deletions

diff --git a/include/git2/tree.h b/include/git2/tree.h
index 7726a6599..3861102d9 100644
--- a/include/git2/tree.h
+++ b/include/git2/tree.h
@@ -209,6 +209,15 @@ GIT_EXTERN(git_otype) git_tree_entry_type(const git_tree_entry *entry);
 GIT_EXTERN(git_filemode_t) git_tree_entry_filemode(const git_tree_entry *entry);
 
 /**
+ * Compare two tree entries
+ *
+ * @param e1 first tree entry
+ * @param e2 second tree entry
+ * @return <0 if e1 is before e2, 0 if e1 == e2, >0 if e1 is after e2
+ */
+GIT_EXTERN(int) git_tree_entry_cmp(const git_tree_entry *e1, const git_tree_entry *e2);
+
+/**
  * Convert a tree entry to the git_object it points too.
  *
  * You must call `git_object_free()` on the object when you are done with it.