resolv: Add beginnings of a libresolv test suite

1 files changed, 49 insertions, 0 deletions

diff --git a/support/xmemstream.h b/support/xmemstream.h
new file mode 100644
index 0000000000..bb3394aa68
--- /dev/null
+++ b/support/xmemstream.h
@@ -0,0 +1,49 @@
+/* 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/>.  */
+
+#ifndef SUPPORT_XMEMSTREAM_H
+#define SUPPORT_XMEMSTREAM_H
+
+#include <stdio.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/* Wrappers for other libc functions.  */
+struct xmemstream
+{
+  FILE *out;
+  char *buffer;
+  size_t length;
+};
+
+/* Create a new in-memory stream.  Initializes *STREAM.  After this
+   function returns, STREAM->out is a file descriptor open for
+   writing.  errno is preserved, so that the %m format specifier can
+   be used for writing to STREAM->out.  */
+void xopen_memstream (struct xmemstream *stream);
+
+/* Closes STREAM->OUT.  After this function returns, STREAM->buffer
+   and STREAM->length denote a memory range which contains the bytes
+   written to the output stream.  The caller should free
+   STREAM->buffer.  */
+void xfclose_memstream (struct xmemstream *stream);
+
+__END_DECLS
+
+#endif /* SUPPORT_XMEMSTREAM_H */