1 files changed, 72 insertions, 0 deletions
diff --git a/gl/tests/test-snprintf.c b/gl/tests/test-snprintf.c
new file mode 100644
index 0000000000..790c999649
--- /dev/null
+++ b/gl/tests/test-snprintf.c
@@ -0,0 +1,72 @@
+/* Test of snprintf() function.
+   Copyright (C) 2007-2008 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+int
+main (int argc, char *argv[])
+{
+  char buf[8];
+  int size;
+  int retval;
+
+  for (size = 0; size <= 8; size++)
+    {
+      memcpy (buf, "DEADBEEF", 8);
+      retval = snprintf (buf, size, "%d", 12345);
+      if (size < 6)
+	{
+#if CHECK_SNPRINTF_POSIX
+	  ASSERT (retval < 0 || retval >= size);
+#endif
+	  if (size > 0)
+	    {
+	      ASSERT (memcmp (buf, "12345", size - 1) == 0);
+	      ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size);
+	    }
+#if !CHECK_SNPRINTF_POSIX
+	  if (size > 0)
+#endif
+	    ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0);
+	}
+      else
+	{
+	  ASSERT (retval == 5);
+	  ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
+	}
+    }
+
+  return 0;
+}