diff options
Diffstat (limited to 'python/google/protobuf/pyext/python_descriptor.cc')
| -rw-r--r-- | python/google/protobuf/pyext/python_descriptor.cc | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/python/google/protobuf/pyext/python_descriptor.cc b/python/google/protobuf/pyext/python_descriptor.cc new file mode 100644 index 00000000..fb87bad1 --- /dev/null +++ b/python/google/protobuf/pyext/python_descriptor.cc @@ -0,0 +1,334 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// http://code.google.com/p/protobuf/ +// +// 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) + +#include <Python.h> + +#include <google/protobuf/pyext/python_descriptor.h> +#include <google/protobuf/descriptor.pb.h> + +#define C(str) const_cast<char*>(str) + +namespace google { +namespace protobuf { +namespace python { + +static void CFieldDescriptorDealloc(CFieldDescriptor* self); + +static google::protobuf::DescriptorPool* g_descriptor_pool = NULL; + +static PyObject* CFieldDescriptor_GetFullName( + CFieldDescriptor* self, void *closure) { + Py_XINCREF(self->full_name); + return self->full_name; +} + +static PyObject* CFieldDescriptor_GetName( + CFieldDescriptor *self, void *closure) { + Py_XINCREF(self->name); + return self->name; +} + +static PyObject* CFieldDescriptor_GetCppType( + CFieldDescriptor *self, void *closure) { + Py_XINCREF(self->cpp_type); + return self->cpp_type; +} + +static PyObject* CFieldDescriptor_GetLabel( + CFieldDescriptor *self, void *closure) { + Py_XINCREF(self->label); + return self->label; +} + +static PyObject* CFieldDescriptor_GetID( + CFieldDescriptor *self, void *closure) { + Py_XINCREF(self->id); + return self->id; +} + + +static PyGetSetDef CFieldDescriptorGetters[] = { + { C("full_name"), + (getter)CFieldDescriptor_GetFullName, NULL, "Full name", NULL}, + { C("name"), + (getter)CFieldDescriptor_GetName, NULL, "last name", NULL}, + { C("cpp_type"), + (getter)CFieldDescriptor_GetCppType, NULL, "C++ Type", NULL}, + { C("label"), + (getter)CFieldDescriptor_GetLabel, NULL, "Label", NULL}, + { C("id"), + (getter)CFieldDescriptor_GetID, NULL, "ID", NULL}, + {NULL} +}; + +PyTypeObject CFieldDescriptor_Type = { + PyObject_HEAD_INIT(&PyType_Type) + 0, + C("google3.net.google.protobuf.python.internal." + "_net_proto2___python." + "CFieldDescriptor"), // tp_name + sizeof(CFieldDescriptor), // tp_basicsize + 0, // tp_itemsize + (destructor)CFieldDescriptorDealloc, // tp_dealloc + 0, // tp_print + 0, // tp_getattr + 0, // tp_setattr + 0, // tp_compare + 0, // tp_repr + 0, // tp_as_number + 0, // tp_as_sequence + 0, // tp_as_mapping + 0, // tp_hash + 0, // tp_call + 0, // tp_str + 0, // tp_getattro + 0, // tp_setattro + 0, // tp_as_buffer + Py_TPFLAGS_DEFAULT, // tp_flags + C("A Field Descriptor"), // tp_doc + 0, // tp_traverse + 0, // tp_clear + 0, // tp_richcompare + 0, // tp_weaklistoffset + 0, // tp_iter + 0, // tp_iternext + 0, // tp_methods + 0, // tp_members + CFieldDescriptorGetters, // tp_getset + 0, // tp_base + 0, // tp_dict + 0, // tp_descr_get + 0, // tp_descr_set + 0, // tp_dictoffset + 0, // tp_init + PyType_GenericAlloc, // tp_alloc + PyType_GenericNew, // tp_new + PyObject_Del, // tp_free +}; + +static void CFieldDescriptorDealloc(CFieldDescriptor* self) { + Py_DECREF(self->full_name); + Py_DECREF(self->name); + Py_DECREF(self->cpp_type); + Py_DECREF(self->label); + Py_DECREF(self->id); + self->ob_type->tp_free(reinterpret_cast<PyObject*>(self)); +} + +typedef struct { + PyObject_HEAD + + const google::protobuf::DescriptorPool* pool; +} CDescriptorPool; + +static void CDescriptorPoolDealloc(CDescriptorPool* self); + +static PyObject* CDescriptorPool_NewCDescriptor( + const google::protobuf::FieldDescriptor* field_descriptor) { + CFieldDescriptor* cfield_descriptor = PyObject_New( + CFieldDescriptor, &CFieldDescriptor_Type); + if (cfield_descriptor == NULL) { + return NULL; + } + cfield_descriptor->descriptor = field_descriptor; + + cfield_descriptor->full_name = PyString_FromString( + field_descriptor->full_name().c_str()); + cfield_descriptor->name = PyString_FromString( + field_descriptor->name().c_str()); + cfield_descriptor->cpp_type = PyLong_FromLong(field_descriptor->cpp_type()); + cfield_descriptor->label = PyLong_FromLong(field_descriptor->label()); + cfield_descriptor->id = PyLong_FromVoidPtr(cfield_descriptor); + return reinterpret_cast<PyObject*>(cfield_descriptor); +} + +static PyObject* CDescriptorPool_FindFieldByName( + CDescriptorPool* self, PyObject* arg) { + const char* full_field_name = PyString_AsString(arg); + if (full_field_name == NULL) { + return NULL; + } + + const google::protobuf::FieldDescriptor* field_descriptor = NULL; + + field_descriptor = self->pool->FindFieldByName(full_field_name); + if (field_descriptor == NULL) { + PyErr_Format(PyExc_TypeError, "Couldn't find field %.200s", + full_field_name); + return NULL; + } + + return CDescriptorPool_NewCDescriptor(field_descriptor); +} + +static PyObject* CDescriptorPool_FindExtensionByName( + CDescriptorPool* self, PyObject* arg) { + const char* full_field_name = PyString_AsString(arg); + if (full_field_name == NULL) { + return NULL; + } + + const google::protobuf::FieldDescriptor* field_descriptor = + self->pool->FindExtensionByName(full_field_name); + if (field_descriptor == NULL) { + PyErr_Format(PyExc_TypeError, "Couldn't find field %.200s", + full_field_name); + return NULL; + } + + return CDescriptorPool_NewCDescriptor(field_descriptor); +} + +static PyMethodDef CDescriptorPoolMethods[] = { + { C("FindFieldByName"), + (PyCFunction)CDescriptorPool_FindFieldByName, + METH_O, + C("Searches for a field descriptor by full name.") }, + { C("FindExtensionByName"), + (PyCFunction)CDescriptorPool_FindExtensionByName, + METH_O, + C("Searches for extension descriptor by full name.") }, + {NULL} +}; + +PyTypeObject CDescriptorPool_Type = { + PyObject_HEAD_INIT(&PyType_Type) + 0, + C("google3.net.google.protobuf.python.internal." + "_net_proto2___python." + "CFieldDescriptor"), // tp_name + sizeof(CDescriptorPool), // tp_basicsize + 0, // tp_itemsize + (destructor)CDescriptorPoolDealloc, // tp_dealloc + 0, // tp_print + 0, // tp_getattr + 0, // tp_setattr + 0, // tp_compare + 0, // tp_repr + 0, // tp_as_number + 0, // tp_as_sequence + 0, // tp_as_mapping + 0, // tp_hash + 0, // tp_call + 0, // tp_str + 0, // tp_getattro + 0, // tp_setattro + 0, // tp_as_buffer + Py_TPFLAGS_DEFAULT, // tp_flags + C("A Descriptor Pool"), // tp_doc + 0, // tp_traverse + 0, // tp_clear + 0, // tp_richcompare + 0, // tp_weaklistoffset + 0, // tp_iter + 0, // tp_iternext + CDescriptorPoolMethods, // tp_methods + 0, // tp_members + 0, // tp_getset + 0, // tp_base + 0, // tp_dict + 0, // tp_descr_get + 0, // tp_descr_set + 0, // tp_dictoffset + 0, // tp_init + PyType_GenericAlloc, // tp_alloc + PyType_GenericNew, // tp_new + PyObject_Del, // tp_free +}; + +static void CDescriptorPoolDealloc(CDescriptorPool* self) { + self->ob_type->tp_free(reinterpret_cast<PyObject*>(self)); +} + +google::protobuf::DescriptorPool* GetDescriptorPool() { + if (g_descriptor_pool == NULL) { + g_descriptor_pool = new google::protobuf::DescriptorPool( + google::protobuf::DescriptorPool::generated_pool()); + } + return g_descriptor_pool; +} + +PyObject* Python_NewCDescriptorPool(PyObject* ignored, PyObject* args) { + CDescriptorPool* cdescriptor_pool = PyObject_New( + CDescriptorPool, &CDescriptorPool_Type); + if (cdescriptor_pool == NULL) { + return NULL; + } + cdescriptor_pool->pool = GetDescriptorPool(); + return reinterpret_cast<PyObject*>(cdescriptor_pool); +} + +PyObject* Python_BuildFile(PyObject* ignored, PyObject* arg) { + char* message_type; + Py_ssize_t message_len; + + if (PyString_AsStringAndSize(arg, &message_type, &message_len) < 0) { + return NULL; + } + + google::protobuf::FileDescriptorProto file_proto; + if (!file_proto.ParseFromArray(message_type, message_len)) { + PyErr_SetString(PyExc_TypeError, "Couldn't parse file content!"); + return NULL; + } + + // If this file is already in the generated pool, don't add it again. + if (google::protobuf::DescriptorPool::generated_pool()->FindFileByName( + file_proto.name()) != NULL) { + Py_RETURN_NONE; + } + + const google::protobuf::FileDescriptor* descriptor = GetDescriptorPool()->BuildFile( + file_proto); + if (descriptor == NULL) { + PyErr_SetString(PyExc_TypeError, + "Couldn't build proto file into descriptor pool!"); + return NULL; + } + + Py_RETURN_NONE; +} + +bool InitDescriptor() { + CFieldDescriptor_Type.tp_new = PyType_GenericNew; + if (PyType_Ready(&CFieldDescriptor_Type) < 0) + return false; + + CDescriptorPool_Type.tp_new = PyType_GenericNew; + if (PyType_Ready(&CDescriptorPool_Type) < 0) + return false; + return true; +} + +} // namespace python +} // namespace protobuf +} // namespace google |