Squashed 'libs/protobuf/' content from commit fcd3b9a85

git-subtree-dir: libs/protobuf
git-subtree-split: fcd3b9a85ef36e46643dc30176cea1a7ad62e02b

python/google/protobuf/pyext/field.cc

@@ -0,0 +1,143 @@
+// 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.
+
+#include "google/protobuf/pyext/field.h"
+
+#include "google/protobuf/descriptor.h"
+#include "google/protobuf/pyext/descriptor.h"
+#include "google/protobuf/pyext/message.h"
+
+namespace google {
+namespace protobuf {
+namespace python {
+
+namespace field {
+
+static PyObject* Repr(PyMessageFieldProperty* self) {
+  return PyUnicode_FromFormat("<field property '%s'>",
+                              self->field_descriptor->full_name().c_str());
+}
+
+static PyObject* DescrGet(PyMessageFieldProperty* self, PyObject* obj,
+                          PyObject* type) {
+  if (obj == nullptr) {
+    Py_INCREF(self);
+    return reinterpret_cast<PyObject*>(self);
+  }
+  return cmessage::GetFieldValue(reinterpret_cast<CMessage*>(obj),
+                                 self->field_descriptor);
+}
+
+static int DescrSet(PyMessageFieldProperty* self, PyObject* obj,
+                    PyObject* value) {
+  if (value == nullptr) {
+    PyErr_SetString(PyExc_AttributeError, "Cannot delete field attribute");
+    return -1;
+  }
+  return cmessage::SetFieldValue(reinterpret_cast<CMessage*>(obj),
+                                 self->field_descriptor, value);
+}
+
+static PyObject* GetDescriptor(PyMessageFieldProperty* self, void* closure) {
+  return PyFieldDescriptor_FromDescriptor(self->field_descriptor);
+}
+
+static PyObject* GetDoc(PyMessageFieldProperty* self, void* closure) {
+  return PyUnicode_FromFormat("Field %s",
+                              self->field_descriptor->full_name().c_str());
+}
+
+static PyGetSetDef Getters[] = {
+    {"DESCRIPTOR", (getter)GetDescriptor, nullptr, "Field descriptor"},
+    {"__doc__", (getter)GetDoc, nullptr, nullptr},
+    {nullptr},
+};
+}  // namespace field
+
+static PyTypeObject _CFieldProperty_Type = {
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)  // head
+    FULL_MODULE_NAME ".FieldProperty",      // tp_name
+    sizeof(PyMessageFieldProperty),         // tp_basicsize
+    0,                                      // tp_itemsize
+    nullptr,                                // tp_dealloc
+#if PY_VERSION_HEX < 0x03080000
+    nullptr,  // tp_print
+#else
+    0,  // tp_vectorcall_offset
+#endif
+    nullptr,                        // tp_getattr
+    nullptr,                        // tp_setattr
+    nullptr,                        // tp_compare
+    (reprfunc)field::Repr,          // tp_repr
+    nullptr,                        // tp_as_number
+    nullptr,                        // tp_as_sequence
+    nullptr,                        // tp_as_mapping
+    nullptr,                        // tp_hash
+    nullptr,                        // tp_call
+    nullptr,                        // tp_str
+    nullptr,                        // tp_getattro
+    nullptr,                        // tp_setattro
+    nullptr,                        // tp_as_buffer
+    Py_TPFLAGS_DEFAULT,             // tp_flags
+    "Field property of a Message",  // tp_doc
+    nullptr,                        // tp_traverse
+    nullptr,                        // tp_clear
+    nullptr,                        // tp_richcompare
+    0,                              // tp_weaklistoffset
+    nullptr,                        // tp_iter
+    nullptr,                        // tp_iternext
+    nullptr,                        // tp_methods
+    nullptr,                        // tp_members
+    field::Getters,                 // tp_getset
+    nullptr,                        // tp_base
+    nullptr,                        // tp_dict
+    (descrgetfunc)field::DescrGet,  // tp_descr_get
+    (descrsetfunc)field::DescrSet,  // tp_descr_set
+    0,                              // tp_dictoffset
+    nullptr,                        // tp_init
+    nullptr,                        // tp_alloc
+    nullptr,                        // tp_new
+};
+PyTypeObject* CFieldProperty_Type = &_CFieldProperty_Type;
+
+PyObject* NewFieldProperty(const FieldDescriptor* field_descriptor) {
+  // Create a new descriptor object
+  PyMessageFieldProperty* property =
+      PyObject_New(PyMessageFieldProperty, CFieldProperty_Type);
+  if (property == nullptr) {
+    return nullptr;
+  }
+  property->field_descriptor = field_descriptor;
+  return reinterpret_cast<PyObject*>(property);
+}
+
+}  // namespace python
+}  // namespace protobuf
+}  // namespace google