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python/google/protobuf/pyext/map_container.h

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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_MAP_CONTAINER_H__
+#define GOOGLE_PROTOBUF_PYTHON_CPP_MAP_CONTAINER_H__
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+
+#include <cstdint>
+
+#include "google/protobuf/descriptor.h"
+#include "google/protobuf/message.h"
+#include "google/protobuf/pyext/message.h"
+
+namespace google {
+namespace protobuf {
+
+class Message;
+
+namespace python {
+
+struct CMessageClass;
+
+// This struct is used directly for ScalarMap, and is the base class of
+// MessageMapContainer, which is used for MessageMap.
+struct MapContainer : public ContainerBase {
+  // Use to get a mutable message when necessary.
+  Message* GetMutableMessage();
+
+  // We bump this whenever we perform a mutation, to invalidate existing
+  // iterators.
+  uint64_t version;
+};
+
+struct MessageMapContainer : public MapContainer {
+  // The type used to create new child messages.
+  CMessageClass* message_class;
+};
+
+bool InitMapContainers();
+
+extern PyTypeObject* MessageMapContainer_Type;
+extern PyTypeObject* ScalarMapContainer_Type;
+extern PyTypeObject MapIterator_Type;  // Both map types use the same iterator.
+
+// Builds a MapContainer object, from a parent message and a
+// field descriptor.
+extern MapContainer* NewScalarMapContainer(
+    CMessage* parent, const FieldDescriptor* parent_field_descriptor);
+
+// Builds a MessageMap object, from a parent message and a
+// field descriptor.
+extern MessageMapContainer* NewMessageMapContainer(
+    CMessage* parent, const FieldDescriptor* parent_field_descriptor,
+    CMessageClass* message_class);
+
+}  // namespace python
+}  // namespace protobuf
+}  // namespace google
+
+#endif  // GOOGLE_PROTOBUF_PYTHON_CPP_MAP_CONTAINER_H__