blame: cmp_suspect is not "cmp" anymore.

The earlier round makes the function return "is it different"
and it does not return a value suitable for sorting anymore.  Reverse
the logic to return "are they the same suspect" instead, and rename
it to "same_suspect()".

Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-blame.c

@@ -180,15 +180,15 @@ struct scoreboard {
 	int *lineno;
 };
 
-static int cmp_suspect(struct origin *a, struct origin *b)
+static inline int same_suspect(struct origin *a, struct origin *b)
 {
-	if (a->commit != b->commit)
+	if (a == b)
 		return 1;
-	return strcmp(a->path, b->path);
+	if (a->commit != b->commit)
+		return 0;
+	return !strcmp(a->path, b->path);
 }
 
-#define cmp_suspect(a, b) ( ((a)==(b)) ? 0 : cmp_suspect(a,b) )
-
 static void sanity_check_refcnt(struct scoreboard *);
 
 /*
@@ -201,7 +201,7 @@ static void coalesce(struct scoreboard *sb)
 	struct blame_entry *ent, *next;
 
 	for (ent = sb->ent; ent && (next = ent->next); ent = next) {
-		if (!cmp_suspect(ent->suspect, next->suspect) &&
+		if (same_suspect(ent->suspect, next->suspect) &&
 		    ent->guilty == next->guilty &&
 		    ent->s_lno + ent->num_lines == next->s_lno) {
 			ent->num_lines += next->num_lines;
@@ -774,7 +774,7 @@ static int find_last_in_target(struct scoreboard *sb, struct origin *target)
 	int last_in_target = -1;
 
 	for (e = sb->ent; e; e = e->next) {
-		if (e->guilty || cmp_suspect(e->suspect, target))
+		if (e->guilty || !same_suspect(e->suspect, target))
 			continue;
 		if (last_in_target < e->s_lno + e->num_lines)
 			last_in_target = e->s_lno + e->num_lines;
@@ -794,7 +794,7 @@ static void blame_chunk(struct scoreboard *sb,
 	struct blame_entry *e;
 
 	for (e = sb->ent; e; e = e->next) {
-		if (e->guilty || cmp_suspect(e->suspect, target))
+		if (e->guilty || !same_suspect(e->suspect, target))
 			continue;
 		if (same <= e->s_lno)
 			continue;
@@ -969,7 +969,7 @@ static int find_move_in_parent(struct scoreboard *sb,
 	while (made_progress) {
 		made_progress = 0;
 		for (e = sb->ent; e; e = e->next) {
-			if (e->guilty || cmp_suspect(e->suspect, target))
+			if (e->guilty || !same_suspect(e->suspect, target))
 				continue;
 			find_copy_in_blob(sb, e, parent, split, &file_p);
 			if (split[1].suspect &&
@@ -1001,12 +1001,12 @@ static struct blame_list *setup_blame_list(struct scoreboard *sb,
 	struct blame_list *blame_list = NULL;
 
 	for (e = sb->ent, num_ents = 0; e; e = e->next)
-		if (!e->guilty && !cmp_suspect(e->suspect, target))
+		if (!e->guilty && same_suspect(e->suspect, target))
 			num_ents++;
 	if (num_ents) {
 		blame_list = xcalloc(num_ents, sizeof(struct blame_list));
 		for (e = sb->ent, i = 0; e; e = e->next)
-			if (!e->guilty && !cmp_suspect(e->suspect, target))
+			if (!e->guilty && same_suspect(e->suspect, target))
 				blame_list[i++].ent = e;
 	}
 	*num_ents_p = num_ents;
@@ -1136,7 +1136,7 @@ static void pass_whole_blame(struct scoreboard *sb,
 		origin->file.ptr = NULL;
 	}
 	for (e = sb->ent; e; e = e->next) {
-		if (cmp_suspect(e->suspect, origin))
+		if (!same_suspect(e->suspect, origin))
 			continue;
 		origin_incref(porigin);
 		origin_decref(e->suspect);
@@ -1442,7 +1442,7 @@ static void assign_blame(struct scoreboard *sb, struct rev_info *revs, int opt)
 
 		/* Take responsibility for the remaining entries */
 		for (ent = sb->ent; ent; ent = ent->next)
-			if (!cmp_suspect(ent->suspect, suspect))
+			if (same_suspect(ent->suspect, suspect))
 				found_guilty_entry(ent);
 		origin_decref(suspect);