rev-list --bisect: Bisection "distance" clean up.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-rev-list.c

@@ -189,7 +189,7 @@ static int count_interesting_parents(struct commit *commit)
 	return count;
 }
 
-static inline int halfway(struct commit_list *p, int distance, int nr)
+static inline int halfway(struct commit_list *p, int nr)
 {
 	/*
 	 * Don't short-cut something we are not going to return!
@@ -202,8 +202,7 @@ static inline int halfway(struct commit_list *p, int distance, int nr)
 	 * 2 and 3 are halfway of 5.
 	 * 3 is halfway of 6 but 2 and 4 are not.
 	 */
-	distance *= 2;
-	switch (distance - nr) {
+	switch (2 * weight(p) - nr) {
 	case -1: case 0: case 1:
 		return 1;
 	default:
@@ -295,7 +294,7 @@ static struct commit_list *best_bisection(struct commit_list *list, int nr)
 static struct commit_list *do_find_bisection(struct commit_list *list,
 					     int nr, int *weights)
 {
-	int n, counted, distance;
+	int n, counted;
 	struct commit_list *p;
 
 	counted = 0;
@@ -346,15 +345,13 @@ static struct commit_list *do_find_bisection(struct commit_list *list,
 	for (p = list; p; p = p->next) {
 		if (p->item->object.flags & UNINTERESTING)
 			continue;
-		n = weight(p);
-		if (n != -2)
+		if (weight(p) != -2)
 			continue;
-		distance = count_distance(p);
+		weight_set(p, count_distance(p));
 		clear_distance(list);
-		weight_set(p, distance);
 
 		/* Does it happen to be at exactly half-way? */
-		if (halfway(p, distance, nr))
+		if (halfway(p, nr))
 			return p;
 		counted++;
 	}
@@ -392,8 +389,7 @@ static struct commit_list *do_find_bisection(struct commit_list *list,
 				weight_set(p, weight(q));
 
 			/* Does it happen to be at exactly half-way? */
-			distance = weight(p);
-			if (halfway(p, distance, nr))
+			if (halfway(p, nr))
 				return p;
 		}
 	}