# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1579281724 -7200
# Node ID 140e2272471c716ec01e4895569ff1d99afc077c
# Parent  964657ad0960f25078b51ddbe1671b4a7e522c90
Add some error checking in th_ringbuf_new().

diff -r 964657ad0960 -r 140e2272471c th_datastruct.c
--- a/th_datastruct.c	Fri Jan 17 19:14:36 2020 +0200
+++ b/th_datastruct.c	Fri Jan 17 19:22:04 2020 +0200
@@ -324,9 +324,21 @@
  */
 th_ringbuf_t * th_ringbuf_new(const size_t size, void (*mdeallocator)(void *data))
 {
-    th_ringbuf_t *res = th_malloc0(sizeof(th_ringbuf_t));
+    th_ringbuf_t *res;
+
+    // Must have at least 2 elements
+    if (size < 2)
+        return NULL;
 
-    res->data = (char **) th_calloc(size, sizeof(char *));
+    if ((res = th_malloc0(sizeof(th_ringbuf_t))) == NULL)
+        return NULL;
+
+    if ((res->data = (char **) th_calloc(size, sizeof(char *))) == NULL)
+    {
+        th_free(res);
+        return NULL;
+    }
+
     res->size = size;
     res->n = 0;
     res->deallocator = mdeallocator;