diff -r 21274e5950af -r a1f4cb076d2f src/ucx/stack.c
--- a/src/ucx/stack.c	Tue Aug 13 22:14:32 2019 +0200
+++ b/src/ucx/stack.c	Sat Sep 24 16:26:10 2022 +0200
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright 2016 Olaf Wintermann. All rights reserved.
+ * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -26,7 +26,8 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "stack.h"
+#include "ucx/stack.h"
+
 #include <string.h>
 
 static size_t ucx_stack_align(size_t n) {
@@ -119,13 +120,15 @@
         return;
     }
     
-    size_t len = ucx_stack_topsize(stack);
-    if (len > n) {
-        len = n;
+    if (dest) {
+        size_t len = ucx_stack_topsize(stack);
+        if (len > n) {
+            len = n;
+        }
+
+        memcpy(dest, stack->top, len);
     }
     
-    memcpy(dest, stack->top, len);
-    
     ucx_stack_free(stack, stack->top);
 }
 
@@ -141,3 +144,22 @@
         return 0;
     }
 }
+
+void *ucx_stack_push(UcxStack *stack, size_t n, const void *data) {
+    void *space = ucx_stack_malloc(stack, n);
+    if (space) {
+        memcpy(space, data, n);
+    }
+    return space;
+}
+
+void *ucx_stack_pusharr(UcxStack *stack,
+        size_t nelem, size_t elsize, const void *data) {
+    
+    // skip the memset by using malloc
+    void *space = ucx_stack_malloc(stack, nelem*elsize);
+    if (space) {
+        memcpy(space, data, nelem*elsize);
+    }
+    return space;
+}