pickaxe: factor out has_changes

Move duplicate if/else construct into its own helper function.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diffcore-pickaxe.c

@@ -190,13 +190,31 @@ static unsigned int contains(struct diff_filespec *one,
 	return cnt;
 }
 
+static int has_changes(struct diff_filepair *p, const char *needle,
+		       unsigned long len, regex_t *regexp, kwset_t kws)
+{
+	if (!DIFF_FILE_VALID(p->one)) {
+		if (!DIFF_FILE_VALID(p->two))
+			return 0; /* ignore unmerged */
+		/* created */
+		return contains(p->two, needle, len, regexp, kws) != 0;
+	}
+	if (!DIFF_FILE_VALID(p->two))
+		return contains(p->one, needle, len, regexp, kws) != 0;
+	if (!diff_unmodified_pair(p)) {
+		return contains(p->one, needle, len, regexp, kws) !=
+		       contains(p->two, needle, len, regexp, kws);
+	}
+	return 0;
+}
+
 static void diffcore_pickaxe_count(struct diff_options *o)
 {
 	const char *needle = o->pickaxe;
 	int opts = o->pickaxe_opts;
 	struct diff_queue_struct *q = &diff_queued_diff;
 	unsigned long len = strlen(needle);
-	int i, has_changes;
+	int i;
 	regex_t regex, *regexp = NULL;
 	kwset_t kws = NULL;
 	struct diff_queue_struct outq;
@@ -223,22 +241,7 @@ static void diffcore_pickaxe_count(struct diff_options *o)
 		/* Showing the whole changeset if needle exists */
 		for (i = 0; i < q->nr; i++) {
 			struct diff_filepair *p = q->queue[i];
-			if (!DIFF_FILE_VALID(p->one)) {
-				if (!DIFF_FILE_VALID(p->two))
-					continue; /* ignore unmerged */
-				/* created */
-				if (contains(p->two, needle, len, regexp, kws))
-					has_changes++;
-			}
-			else if (!DIFF_FILE_VALID(p->two)) {
-				if (contains(p->one, needle, len, regexp, kws))
-					has_changes++;
-			}
-			else if (!diff_unmodified_pair(p) &&
-				 contains(p->one, needle, len, regexp, kws) !=
-				 contains(p->two, needle, len, regexp, kws))
-				has_changes++;
-			if (has_changes)
+			if (has_changes(p, needle, len, regexp, kws))
 				goto out; /* do not munge the queue */
 		}
 
@@ -254,25 +257,7 @@ static void diffcore_pickaxe_count(struct diff_options *o)
 		/* Showing only the filepairs that has the needle */
 		for (i = 0; i < q->nr; i++) {
 			struct diff_filepair *p = q->queue[i];
-			has_changes = 0;
-			if (!DIFF_FILE_VALID(p->one)) {
-				if (!DIFF_FILE_VALID(p->two))
-					; /* ignore unmerged */
-				/* created */
-				else if (contains(p->two, needle, len, regexp,
-						  kws))
-					has_changes = 1;
-			}
-			else if (!DIFF_FILE_VALID(p->two)) {
-				if (contains(p->one, needle, len, regexp, kws))
-					has_changes = 1;
-			}
-			else if (!diff_unmodified_pair(p) &&
-				 contains(p->one, needle, len, regexp, kws) !=
-				 contains(p->two, needle, len, regexp, kws))
-				has_changes = 1;
-
-			if (has_changes)
+			if (has_changes(p, needle, len, regexp, kws))
 				diff_q(&outq, p);
 			else
 				diff_free_filepair(p);