121 lines
4.4 KiB
Python
121 lines
4.4 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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# https://developers.google.com/protocol-buffers/
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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