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-rw-r--r--diffcore-rename.c20
1 files changed, 8 insertions, 12 deletions
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 55cf1c3..625b589 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -170,19 +170,15 @@ static int estimate_similarity(struct diff_filespec *src,
&src_copied, &literal_added))
return 0;
- /* 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
- * and 0% edit gets MAX_SCORE points.
+ /* How similar are they?
+ * what percentage of material in dst are from source?
*/
- score = MAX_SCORE - (MAX_SCORE * delta_size / base_size);
- if (score < 0) return 0;
- if (MAX_SCORE < score) return MAX_SCORE;
+ if (dst->size < src_copied)
+ score = MAX_SCORE;
+ else if (!dst->size)
+ score = 0; /* should not happen */
+ else
+ score = src_copied * MAX_SCORE / dst->size;
return score;
}