98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
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# Protocol Buffers - Google's data interchange format
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# Copyright 2008 Google Inc. All rights reserved.
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#
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file or at
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# https://developers.google.com/open-source/licenses/bsd
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"""Contains Unknown Fields APIs.
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Simple usage example:
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unknown_field_set = UnknownFieldSet(message)
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for unknown_field in unknown_field_set:
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wire_type = unknown_field.wire_type
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field_number = unknown_field.field_number
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data = unknown_field.data
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"""
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from google.protobuf.internal import api_implementation
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if api_implementation._c_module is not None: # pylint: disable=protected-access
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UnknownFieldSet = api_implementation._c_module.UnknownFieldSet # pylint: disable=protected-access
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else:
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from google.protobuf.internal import decoder # pylint: disable=g-import-not-at-top
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from google.protobuf.internal import wire_format # pylint: disable=g-import-not-at-top
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class UnknownField:
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"""A parsed unknown field."""
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# Disallows assignment to other attributes.
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__slots__ = ['_field_number', '_wire_type', '_data']
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def __init__(self, field_number, wire_type, data):
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self._field_number = field_number
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self._wire_type = wire_type
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self._data = data
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return
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@property
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def field_number(self):
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return self._field_number
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@property
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def wire_type(self):
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return self._wire_type
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@property
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def data(self):
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return self._data
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class UnknownFieldSet:
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"""UnknownField container."""
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# Disallows assignment to other attributes.
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__slots__ = ['_values']
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def __init__(self, msg):
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def InternalAdd(field_number, wire_type, data):
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unknown_field = UnknownField(field_number, wire_type, data)
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self._values.append(unknown_field)
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self._values = []
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msg_des = msg.DESCRIPTOR
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# pylint: disable=protected-access
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unknown_fields = msg._unknown_fields
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if (msg_des.has_options and
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msg_des.GetOptions().message_set_wire_format):
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local_decoder = decoder.UnknownMessageSetItemDecoder()
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for _, buffer in unknown_fields:
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(field_number, data) = local_decoder(memoryview(buffer))
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InternalAdd(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED, data)
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else:
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for tag_bytes, buffer in unknown_fields:
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# pylint: disable=protected-access
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(tag, _) = decoder._DecodeVarint(tag_bytes, 0)
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field_number, wire_type = wire_format.UnpackTag(tag)
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if field_number == 0:
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raise RuntimeError('Field number 0 is illegal.')
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(data, _) = decoder._DecodeUnknownField(
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memoryview(buffer), 0, wire_type)
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InternalAdd(field_number, wire_type, data)
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def __getitem__(self, index):
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size = len(self._values)
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if index < 0:
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index += size
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if index < 0 or index >= size:
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raise IndexError('index %d out of range'.index)
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return self._values[index]
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def __len__(self):
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return len(self._values)
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def __iter__(self):
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return iter(self._values)
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