resolv: Add beginnings of a libresolv test suite

1 files changed, 42 insertions, 0 deletions

diff --git a/support/xmemstream.c b/support/xmemstream.c
new file mode 100644
index 0000000000..697d7c7ff3
--- /dev/null
+++ b/support/xmemstream.c
@@ -0,0 +1,42 @@
+/* Error-checking wrappers for memstream functions.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <support/xmemstream.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <support/check.h>
+#include <support/xstdio.h>
+
+void
+xopen_memstream (struct xmemstream *stream)
+{
+  int old_errno = errno;
+  *stream = (struct xmemstream) {};
+  stream->out = open_memstream (&stream->buffer, &stream->length);
+  if (stream->out == NULL)
+    FAIL_EXIT1 ("open_memstream: %m");
+  errno = old_errno;
+}
+
+void
+xfclose_memstream (struct xmemstream *stream)
+{
+  xfclose (stream->out);
+  stream->out = NULL;
+}