X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=diffcore-rename.c;h=19325f245c251b7a1bd6bd585eb05d7e3f51ca44;hb=000182eacf99cde27d5916aa415921924b82972c;hp=6ed8cf5aec7dc60d1eeeaed3a6a8781832aa3205;hpb=2cd68882ee8629f9782be017007fff4c78e45e45;p=git.git

diff --git a/diffcore-rename.c b/diffcore-rename.c
index 6ed8cf5a..19325f24 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -135,7 +135,7 @@ static int estimate_similarity(struct diff_filespec *src,
 	 * 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 @@ static int estimate_similarity(struct diff_filespec *src,
 		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
@@ -222,24 +229,6 @@ static int score_compare(const void *a_, const void *b_)
 	return b->score - a->score;
 }
 
-int diff_scoreopt_parse(const char *opt)
-{
-	int diglen, num, scale, i;
-	if (opt[0] != '-' || (opt[1] != 'M' && opt[1] != 'C'))
-		return -1; /* that is not a -M nor -C option */
-	diglen = strspn(opt+2, "0123456789");
-	if (diglen == 0 || strlen(opt+2) != diglen)
-		return 0; /* use default */
-	sscanf(opt+2, "%d", &num);
-	for (i = 0, scale = 1; i < diglen; i++)
-		scale *= 10;
-
-	/* user says num divided by scale and we say internally that
-	 * is MAX_SCORE * num / scale.
-	 */
-	return MAX_SCORE * num / scale;
-}
-
 void diffcore_rename(int detect_rename, int minimum_score)
 {
 	struct diff_queue_struct *q = &diff_queued_diff;
@@ -249,7 +238,7 @@ void diffcore_rename(int detect_rename, int minimum_score)
 	int num_create, num_src, dst_cnt;
 
 	if (!minimum_score)
-		minimum_score = DEFAULT_MINIMUM_SCORE;
+		minimum_score = DEFAULT_RENAME_SCORE;
 	renq.queue = NULL;
 	renq.nr = renq.alloc = 0;
 
@@ -353,17 +342,36 @@ void diffcore_rename(int detect_rename, int minimum_score)
 			/*
 			 * Deletion
 			 *
-			 * We would output this delete record if renq
-			 * does not have a rename/copy to move
-			 * p->one->path out.
+			 * We would output this delete record if:
+			 *
+			 * (1) this is a broken delete and the counterpart
+			 *     broken create remains in the output; or
+			 * (2) this is not a broken delete, and renq does
+			 *     not have a rename/copy to move p->one->path
+			 *     out.
+			 *
+			 * Otherwise, the counterpart broken create
+			 * has been turned into a rename-edit; or
+			 * delete did not have a matching create to
+			 * begin with.
 			 */
-			for (j = 0; j < renq.nr; j++)
-				if (!strcmp(renq.queue[j]->one->path,
-					    p->one->path))
-					break;
-			if (j < renq.nr)
-				/* this path remains */
-				pair_to_free = p;
+			if (DIFF_PAIR_BROKEN(p)) {
+				/* broken delete */
+				struct diff_rename_dst *dst =
+					locate_rename_dst(p->one, 0);
+				if (dst && dst->pair)
+					/* counterpart is now rename/copy */
+					pair_to_free = p;
+			}
+			else {
+				for (j = 0; j < renq.nr; j++)
+					if (!strcmp(renq.queue[j]->one->path,
+						    p->one->path))
+						break;
+				if (j < renq.nr)
+					/* this path remains */
+					pair_to_free = p;
+			}
 
 			if (pair_to_free)
 				;