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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.
// Author: petar@google.com (Petar Petrov)
#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_DESCRIPTOR_H__
#define GOOGLE_PROTOBUF_PYTHON_CPP_DESCRIPTOR_H__
#include <Python.h>
#include <structmember.h>
#include <google/protobuf/stubs/hash.h>
#include <google/protobuf/descriptor.h>
#if PY_VERSION_HEX < 0x02050000 && !defined(PY_SSIZE_T_MIN)
typedef int Py_ssize_t;
#define PY_SSIZE_T_MAX INT_MAX
#define PY_SSIZE_T_MIN INT_MIN
#endif
namespace google {
namespace protobuf {
namespace python {
typedef struct CMessageDescriptor {
PyObject_HEAD
// The proto2 descriptor that this object represents.
const google::protobuf::Descriptor* descriptor;
} CMessageDescriptor;
typedef struct CFieldDescriptor {
PyObject_HEAD
// The proto2 descriptor that this object represents.
const google::protobuf::FieldDescriptor* descriptor;
} CFieldDescriptor;
// Wraps operations to the global DescriptorPool which contains information
// about all messages and fields.
//
// There is normally one pool per process. We make it a Python object only
// because it contains many Python references.
// TODO(amauryfa): See whether such objects can appear in reference cycles, and
// consider adding support for the cyclic GC.
//
// "Methods" that interacts with this DescriptorPool are in the cdescriptor_pool
// namespace.
typedef struct PyDescriptorPool {
PyObject_HEAD
google::protobuf::DescriptorPool* pool;
// Make our own mapping to retrieve Python classes from C++ descriptors.
//
// Descriptor pointers stored here are owned by the DescriptorPool above.
// Python references to classes are owned by this PyDescriptorPool.
typedef hash_map<const Descriptor *, PyObject *> ClassesByMessageMap;
ClassesByMessageMap *classes_by_descriptor;
} PyDescriptorPool;
extern PyTypeObject CMessageDescriptor_Type;
extern PyTypeObject CFieldDescriptor_Type;
extern PyTypeObject PyDescriptorPool_Type;
namespace cdescriptor_pool {
// Builds a new DescriptorPool. Normally called only once per process.
PyDescriptorPool* NewDescriptorPool();
// Looks up a message by name.
// Returns a message Descriptor, or NULL if not found.
const google::protobuf::Descriptor* FindMessageTypeByName(PyDescriptorPool* self,
const string& name);
// Registers a new Python class for the given message descriptor.
// Returns the message Descriptor.
// On error, returns NULL with a Python exception set.
const google::protobuf::Descriptor* RegisterMessageClass(
PyDescriptorPool* self, PyObject *message_class, PyObject *descriptor);
// Retrieves the Python class registered with the given message descriptor.
//
// Returns a *borrowed* reference if found, otherwise returns NULL with an
// exception set.
PyObject *GetMessageClass(PyDescriptorPool* self,
const Descriptor *message_descriptor);
// Looks up a field by name. Returns a CDescriptor corresponding to
// the field on success, or NULL on failure.
//
// Returns a new reference.
PyObject* FindFieldByName(PyDescriptorPool* self, PyObject* name);
// Looks up an extension by name. Returns a CDescriptor corresponding
// to the field on success, or NULL on failure.
//
// Returns a new reference.
PyObject* FindExtensionByName(PyDescriptorPool* self, PyObject* arg);
} // namespace cdescriptor_pool
PyObject* Python_BuildFile(PyObject* ignored, PyObject* args);
bool InitDescriptor();
} // namespace python
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_PYTHON_CPP_DESCRIPTOR_H__
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