From 83608e80322642e681918a647ef54a67e7bb15a3 Mon Sep 17 00:00:00 2001
From: rimio <vasi.vilvoiu@gmail.com>
Date: Mon, 7 Jan 2019 17:41:03 +0200
Subject: Some changes

---
 src/sstv.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/sstv.c')

diff --git a/src/sstv.c b/src/sstv.c
index a29acd3..e91ae2b 100644
--- a/src/sstv.c
+++ b/src/sstv.c
@@ -13,6 +13,11 @@ sstv_free_t sstv_free_user = NULL;
 sstv_error_t
 sstv_init(sstv_malloc_t alloc_func, sstv_free_t dealloc_func)
 {
+    /* Check that either both or none of the functions are provided */
+    if ((!alloc_func && dealloc_func) || (alloc_func && !dealloc_func)) {
+        return SSTV_BAD_INITIALIZERS;
+    }
+
     /* Keep user functions for allocation/deallocation */
     sstv_malloc_user = alloc_func;
     sstv_free_user = dealloc_func;
-- 
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