1 files changed, 38 insertions, 0 deletions
diff --git a/tests/ftell.c b/tests/ftell.c
new file mode 100644
index 0000000..79083fb
--- /dev/null
+++ b/tests/ftell.c
@@ -0,0 +1,38 @@
+/* An ftell() function that works around platform bugs.
+   Copyright (C) 2007-2011 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/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+/* Get off_t.  */
+#include <unistd.h>
+
+long
+ftell (FILE *fp)
+{
+  /* Use the replacement ftello function with all its workarounds.  */
+  off_t offset = ftello (fp);
+  if (offset == (long)offset)
+    return (long)offset;
+  else
+    {
+      errno = EOVERFLOW;
+      return -1;
+    }
+}