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

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

Index: third_party/protobuf/python/google/protobuf/pyext/python_descriptor.cc
diff --git a/third_party/protobuf/python/google/protobuf/pyext/python_descriptor.cc b/third_party/protobuf/python/google/protobuf/pyext/python_descriptor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5e3e9ea4ea03a38779353cdc32c65c45bd99f1df
--- /dev/null
+++ b/third_party/protobuf/python/google/protobuf/pyext/python_descriptor.cc
@@ -0,0 +1,337 @@
+// 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 <string>
+
+#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("google.protobuf.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("google.protobuf.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 (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