Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2016-07-06' into staging

QAPI patches for 2016-07-06

# gpg: Signature made Wed 06 Jul 2016 10:00:51 BST
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-qapi-2016-07-06:
  replay: Use new QAPI cloning
  sockets: Use new QAPI cloning
  qapi: Add new clone visitor
  qapi: Add new visit_complete() function
  tests: Factor out common code in qapi output tests
  tests: Clean up test-string-output-visitor
  qmp-output-visitor: Favor new visit_free() function
  string-output-visitor: Favor new visit_free() function
  qmp-input-visitor: Favor new visit_free() function
  string-input-visitor: Favor new visit_free() function
  opts-visitor: Favor new visit_free() function
  qapi: Add new visit_free() function
  qapi: Add parameter to visit_end_*
  qemu-img: Don't leak errors when outputting JSON
  qapi: Improve use of qmp/types.h

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/include/qapi/clone-visitor.h b/include/qapi/clone-visitor.h
new file mode 100644
index 0000000000..b16177e1ee
--- /dev/null
+++ b/include/qapi/clone-visitor.h
@@ -0,0 +1,39 @@
+/*
+ * Clone Visitor
+ *
+ * Copyright (C) 2016 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QAPI_CLONE_VISITOR_H
+#define QAPI_CLONE_VISITOR_H
+
+#include "qemu/typedefs.h"
+#include "qapi/visitor.h"
+#include "qapi-visit.h"
+
+/*
+ * The clone visitor is for direct use only by the QAPI_CLONE() macro;
+ * it requires that the root visit occur on an object, list, or
+ * alternate, and is not usable directly on built-in QAPI types.
+ */
+typedef struct QapiCloneVisitor QapiCloneVisitor;
+
+void *qapi_clone(const void *src, void (*visit_type)(Visitor *, const char *,
+                                                     void **, Error **));
+
+/*
+ * Deep-clone QAPI object @src of the given @type, and return the result.
+ *
+ * Not usable on QAPI scalars (integers, strings, enums), nor on a
+ * QAPI object that references the 'any' type.  Safe when @src is NULL.
+ */
+#define QAPI_CLONE(type, src)                                           \
+    ((type *)qapi_clone(src,                                            \
+                        (void (*)(Visitor *, const char *, void**,      \
+                                  Error **))visit_type_ ## type))
+
+#endif