Consider Strgrow overflow in Strinsert_char

1 files changed, 3 insertions, 1 deletions

diff --git a/Str.c b/Str.c
index ab8e4bd..b4f1360 100644
--- a/Str.c
+++ b/Str.c
@@ -348,10 +348,12 @@ Strinsert_char(Str s, int pos, char c)
 {
     int i;
     STR_LENGTH_CHECK(s);
-    if (pos < 0 || s->length < pos)
+    if (pos < 0)
 	return;
     if (s->length + 2 > s->area_size)
 	Strgrow(s);
+    if (s->length < pos)
+	return;
     for (i = s->length; i > pos; i--)
 	s->ptr[i] = s->ptr[i - 1];
     s->ptr[++s->length] = '\0';