1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // https://developers.google.com/protocol-buffers/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 // Author: anuraag (at) google.com (Anuraag Agrawal) 32 // Author: tibell (at) google.com (Johan Tibell) 33 34 #ifndef GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_SCALAR_CONTAINER_H__ 35 #define GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_SCALAR_CONTAINER_H__ 36 37 #include <Python.h> 38 39 #include <memory> 40 #ifndef _SHARED_PTR_H 41 #include <google/protobuf/stubs/shared_ptr.h> 42 #endif 43 44 #include <google/protobuf/descriptor.h> 45 46 namespace google { 47 namespace protobuf { 48 49 class Message; 50 51 #ifdef _SHARED_PTR_H 52 using std::shared_ptr; 53 #else 54 using internal::shared_ptr; 55 #endif 56 57 namespace python { 58 59 struct CMessage; 60 61 typedef struct RepeatedScalarContainer { 62 PyObject_HEAD; 63 64 // This is the top-level C++ Message object that owns the whole 65 // proto tree. Every Python RepeatedScalarContainer holds a 66 // reference to it in order to keep it alive as long as there's a 67 // Python object that references any part of the tree. 68 shared_ptr<Message> owner; 69 70 // Pointer to the C++ Message that contains this container. The 71 // RepeatedScalarContainer does not own this pointer. 72 Message* message; 73 74 // Weak reference to a parent CMessage object (i.e. may be NULL.) 75 // 76 // Used to make sure all ancestors are also mutable when first 77 // modifying the container. 78 CMessage* parent; 79 80 // Pointer to the parent's descriptor that describes this 81 // field. Used together with the parent's message when making a 82 // default message instance mutable. 83 // The pointer is owned by the global DescriptorPool. 84 const FieldDescriptor* parent_field_descriptor; 85 } RepeatedScalarContainer; 86 87 extern PyTypeObject RepeatedScalarContainer_Type; 88 89 namespace repeated_scalar_container { 90 91 // Builds a RepeatedScalarContainer object, from a parent message and a 92 // field descriptor. 93 extern PyObject *NewContainer( 94 CMessage* parent, const FieldDescriptor* parent_field_descriptor); 95 96 // Appends the scalar 'item' to the end of the container 'self'. 97 // 98 // Returns None if successful; returns NULL and sets an exception if 99 // unsuccessful. 100 PyObject* Append(RepeatedScalarContainer* self, PyObject* item); 101 102 // Releases the messages in the container to a new message. 103 // 104 // Returns 0 on success, -1 on failure. 105 int Release(RepeatedScalarContainer* self); 106 107 // Appends all the elements in the input iterator to the container. 108 // 109 // Returns None if successful; returns NULL and sets an exception if 110 // unsuccessful. 111 PyObject* Extend(RepeatedScalarContainer* self, PyObject* value); 112 113 // Set the owner field of self and any children of self. 114 void SetOwner(RepeatedScalarContainer* self, 115 const shared_ptr<Message>& new_owner); 116 117 } // namespace repeated_scalar_container 118 } // namespace python 119 } // namespace protobuf 120 121 } // namespace google 122 #endif // GOOGLE_PROTOBUF_PYTHON_CPP_REPEATED_SCALAR_CONTAINER_H__ 123
