[PATCH] Tweak count-delta interface
Make it return copied source and insertion separately, so that
later implementation of heuristics can use them more flexibly.
This does not change the heuristics implemented in
diffcore-rename nor diffcore-break in any way.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 8ed37da..eac782b 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -135,7 +135,7 @@
* call into this function in that case.
*/
void *delta;
- unsigned long delta_size, base_size;
+ unsigned long delta_size, base_size, src_copied, literal_added;
int score;
/* We deal only with regular files. Symlink renames are handled
@@ -174,10 +174,17 @@
return 0;
/* Estimate the edit size by interpreting delta. */
- delta_size = count_delta(delta, delta_size);
- free(delta);
- if (delta_size == UINT_MAX)
+ if (count_delta(delta, delta_size, &src_copied, &literal_added)) {
+ free(delta);
return 0;
+ }
+ free(delta);
+
+ /* Extent of damage */
+ if (src->size + literal_added < src_copied)
+ delta_size = 0;
+ else
+ delta_size = (src->size - src_copied) + literal_added;
/*
* Now we will give some score to it. 100% edit gets 0 points
