1 files changed, 26 insertions, 0 deletions

diff --git a/tests/test_mbsnrtowcs_static.c b/tests/test_mbsnrtowcs_static.c
new file mode 100644
index 0000000..755d453
--- /dev/null
+++ b/tests/test_mbsnrtowcs_static.c
@@ -0,0 +1,26 @@
+#include "common.h"
+
+#include <wchar.h>
+#include <string.h>
+
+int main(int argc, char** argv) {
+  wchar_t buffer[4] = {0};
+  const char *src = "ABCDEFGHIJKLMNOP";
+  const char *srcp = src;
+  mbstate_t st;
+  memset(&st, 0, sizeof(st));
+
+  /* Safe: convert up to 4 source bytes into at most 2 wide chars */
+  srcp = src;
+  mbsnrtowcs(buffer, &srcp, 4, 2, &st);
+
+  /* Unsafe: ask to write 16 wide chars into 4-element buffer */
+  CHK_FAIL_START
+  srcp = src;
+  memset(&st, 0, sizeof(st));
+  mbsnrtowcs(buffer, &srcp, 16, 16, &st);
+  CHK_FAIL_END
+
+  printf("%ls\n", buffer);
+  return ret;
+}