1 files changed, 14 insertions, 7 deletions

diff --git a/src/internal.h b/src/internal.h
index f1e08dc..812688f 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -33,16 +33,23 @@ inline static bool init_children(struct json *obj) {
 	return true;
 }
 
+inline static bool ensure_size(struct json *dest, size_t to_add) {
+	struct json_children *chld = dest->children;
+	while (chld->nitems + to_add >= chld->maxitems) {
+		chld->maxitems *= 2;
+		chld = realloc(chld, sizeof(*chld) + (sizeof(*chld->items) * chld->maxitems));
+		if (!chld)
+			return false;
+		dest->children = chld;
+	}
+	return true;
+}
 
 inline static void add_children(struct json *dest, struct json *src) {
+	if (!ensure_size(dest, 1))
+		return;
+
 	struct json_children *children = dest->children;
-	if (children->nitems + 1 >= children->maxitems) {
-		children->maxitems += 5;
-		children = realloc(children, sizeof(*children) + (sizeof(*children->items) * children->maxitems));
-		if (!children)
-			return;
-		dest->children = children;
-	}
 
 	src->parent = dest;
 	src->index = children->nitems;