Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/python/google/protobuf/pyext/extension_dict.cc

Index: third_party/protobuf/python/google/protobuf/pyext/extension_dict.cc
diff --git a/third_party/protobuf/python/google/protobuf/pyext/extension_dict.cc b/third_party/protobuf/python/google/protobuf/pyext/extension_dict.cc
deleted file mode 100644
index b8d18f8d92cf094a49b58f5640f4c362c9b5f77e..0000000000000000000000000000000000000000
--- a/third_party/protobuf/python/google/protobuf/pyext/extension_dict.cc
+++ /dev/null
@@ -1,298 +0,0 @@
-// 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: anuraag@google.com (Anuraag Agrawal)
-// Author: tibell@google.com (Johan Tibell)
-
-#include <google/protobuf/pyext/extension_dict.h>
-
-#include <google/protobuf/stubs/common.h>
-#include <google/protobuf/descriptor.h>
-#include <google/protobuf/dynamic_message.h>
-#include <google/protobuf/message.h>
-#include <google/protobuf/pyext/descriptor.h>
-#include <google/protobuf/pyext/descriptor_pool.h>
-#include <google/protobuf/pyext/message.h>
-#include <google/protobuf/pyext/repeated_composite_container.h>
-#include <google/protobuf/pyext/repeated_scalar_container.h>
-#include <google/protobuf/pyext/scoped_pyobject_ptr.h>
-#include <google/protobuf/stubs/shared_ptr.h>
-
-namespace google {
-namespace protobuf {
-namespace python {
-
-namespace extension_dict {
-
-PyObject* len(ExtensionDict* self) {
-#if PY_MAJOR_VERSION >= 3
-  return PyLong_FromLong(PyDict_Size(self->values));
-#else
-  return PyInt_FromLong(PyDict_Size(self->values));
-#endif
-}
-
-// TODO(tibell): Use VisitCompositeField.
-int ReleaseExtension(ExtensionDict* self,
-                     PyObject* extension,
-                     const FieldDescriptor* descriptor) {
-  if (descriptor->label() == FieldDescriptor::LABEL_REPEATED) {
-    if (descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
-      if (repeated_composite_container::Release(
-              reinterpret_cast<RepeatedCompositeContainer*>(
-                  extension)) < 0) {
-        return -1;
-      }
-    } else {
-      if (repeated_scalar_container::Release(
-              reinterpret_cast<RepeatedScalarContainer*>(
-                  extension)) < 0) {
-        return -1;
-      }
-    }
-  } else if (descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
-    if (cmessage::ReleaseSubMessage(
-            self->parent, descriptor,
-            reinterpret_cast<CMessage*>(extension)) < 0) {
-      return -1;
-    }
-  }
-
-  return 0;
-}
-
-PyObject* subscript(ExtensionDict* self, PyObject* key) {
-  const FieldDescriptor* descriptor = cmessage::GetExtensionDescriptor(key);
-  if (descriptor == NULL) {
-    return NULL;
-  }
-  if (!CheckFieldBelongsToMessage(descriptor, self->parent->message)) {
-    return NULL;
-  }
-
-  if (descriptor->label() != FieldDescriptor::LABEL_REPEATED &&
-      descriptor->cpp_type() != FieldDescriptor::CPPTYPE_MESSAGE) {
-    return cmessage::InternalGetScalar(self->parent->message, descriptor);
-  }
-
-  PyObject* value = PyDict_GetItem(self->values, key);
-  if (value != NULL) {
-    Py_INCREF(value);
-    return value;
-  }
-
-  if (descriptor->label() != FieldDescriptor::LABEL_REPEATED &&
-      descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
-    PyObject* sub_message = cmessage::InternalGetSubMessage(
-        self->parent, descriptor);
-    if (sub_message == NULL) {
-      return NULL;
-    }
-    PyDict_SetItem(self->values, key, sub_message);
-    return sub_message;
-  }
-
-  if (descriptor->label() == FieldDescriptor::LABEL_REPEATED) {
-    if (descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
-      PyObject *message_class = cdescriptor_pool::GetMessageClass(
-          GetDescriptorPool(), descriptor->message_type());
-      if (message_class == NULL) {
-        return NULL;
-      }
-      PyObject* py_container = repeated_composite_container::NewContainer(
-          self->parent, descriptor, message_class);
-      if (py_container == NULL) {
-        return NULL;
-      }
-      PyDict_SetItem(self->values, key, py_container);
-      return py_container;
-    } else {
-      PyObject* py_container = repeated_scalar_container::NewContainer(
-          self->parent, descriptor);
-      if (py_container == NULL) {
-        return NULL;
-      }
-      PyDict_SetItem(self->values, key, py_container);
-      return py_container;
-    }
-  }
-  PyErr_SetString(PyExc_ValueError, "control reached unexpected line");
-  return NULL;
-}
-
-int ass_subscript(ExtensionDict* self, PyObject* key, PyObject* value) {
-  const FieldDescriptor* descriptor = cmessage::GetExtensionDescriptor(key);
-  if (descriptor == NULL) {
-    return -1;
-  }
-  if (!CheckFieldBelongsToMessage(descriptor, self->parent->message)) {
-    return -1;
-  }
-
-  if (descriptor->label() != FieldDescriptor::LABEL_OPTIONAL ||
-      descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
-    PyErr_SetString(PyExc_TypeError, "Extension is repeated and/or composite "
-                    "type");
-    return -1;
-  }
-  cmessage::AssureWritable(self->parent);
-  if (cmessage::InternalSetScalar(self->parent, descriptor, value) < 0) {
-    return -1;
-  }
-  // TODO(tibell): We shouldn't write scalars to the cache.
-  PyDict_SetItem(self->values, key, value);
-  return 0;
-}
-
-PyObject* ClearExtension(ExtensionDict* self, PyObject* extension) {
-  const FieldDescriptor* descriptor =
-      cmessage::GetExtensionDescriptor(extension);
-  if (descriptor == NULL) {
-    return NULL;
-  }
-  PyObject* value = PyDict_GetItem(self->values, extension);
-  if (value != NULL) {
-    if (ReleaseExtension(self, value, descriptor) < 0) {
-      return NULL;
-    }
-  }
-  if (cmessage::ClearFieldByDescriptor(self->parent, descriptor) == NULL) {
-    return NULL;
-  }
-  if (PyDict_DelItem(self->values, extension) < 0) {
-    PyErr_Clear();
-  }
-  Py_RETURN_NONE;
-}
-
-PyObject* HasExtension(ExtensionDict* self, PyObject* extension) {
-  const FieldDescriptor* descriptor =
-      cmessage::GetExtensionDescriptor(extension);
-  if (descriptor == NULL) {
-    return NULL;
-  }
-  PyObject* result = cmessage::HasFieldByDescriptor(self->parent, descriptor);
-  return result;
-}
-
-PyObject* _FindExtensionByName(ExtensionDict* self, PyObject* name) {
-  ScopedPyObjectPtr extensions_by_name(PyObject_GetAttrString(
-      reinterpret_cast<PyObject*>(self->parent), "_extensions_by_name"));
-  if (extensions_by_name == NULL) {
-    return NULL;
-  }
-  PyObject* result = PyDict_GetItem(extensions_by_name, name);
-  if (result == NULL) {
-    Py_RETURN_NONE;
-  } else {
-    Py_INCREF(result);
-    return result;
-  }
-}
-
-ExtensionDict* NewExtensionDict(CMessage *parent) {
-  ExtensionDict* self = reinterpret_cast<ExtensionDict*>(
-      PyType_GenericAlloc(&ExtensionDict_Type, 0));
-  if (self == NULL) {
-    return NULL;
-  }
-
-  self->parent = parent;  // Store a borrowed reference.
-  self->message = parent->message;
-  self->owner = parent->owner;
-  self->values = PyDict_New();
-  return self;
-}
-
-void dealloc(ExtensionDict* self) {
-  Py_CLEAR(self->values);
-  self->owner.reset();
-  Py_TYPE(self)->tp_free(reinterpret_cast<PyObject*>(self));
-}
-
-static PyMappingMethods MpMethods = {
-  (lenfunc)len,               /* mp_length */
-  (binaryfunc)subscript,      /* mp_subscript */
-  (objobjargproc)ass_subscript,/* mp_ass_subscript */
-};
-
-#define EDMETHOD(name, args, doc) { #name, (PyCFunction)name, args, doc }
-static PyMethodDef Methods[] = {
-  EDMETHOD(ClearExtension, METH_O, "Clears an extension from the object."),
-  EDMETHOD(HasExtension, METH_O, "Checks if the object has an extension."),
-  EDMETHOD(_FindExtensionByName, METH_O,
-           "Finds an extension by name."),
-  { NULL, NULL }
-};
-
-}  // namespace extension_dict
-
-PyTypeObject ExtensionDict_Type = {
-  PyVarObject_HEAD_INIT(&PyType_Type, 0)
-  FULL_MODULE_NAME ".ExtensionDict",   // tp_name
-  sizeof(ExtensionDict),               // tp_basicsize
-  0,                                   //  tp_itemsize
-  (destructor)extension_dict::dealloc,  //  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
-  &extension_dict::MpMethods,          //  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
-  "An extension dict",                 //  tp_doc
-  0,                                   //  tp_traverse
-  0,                                   //  tp_clear
-  0,                                   //  tp_richcompare
-  0,                                   //  tp_weaklistoffset
-  0,                                   //  tp_iter
-  0,                                   //  tp_iternext
-  extension_dict::Methods,             //  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
-};
-
-}  // namespace python
-}  // namespace protobuf
-}  // namespace google