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-rwxr-xr-xpython/google/protobuf/internal/output_stream.py125
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diff --git a/python/google/protobuf/internal/output_stream.py b/python/google/protobuf/internal/output_stream.py
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--- a/python/google/protobuf/internal/output_stream.py
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-# 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.
-
-"""OutputStream is the primitive interface for sticking bits on the wire.
-
-All protocol buffer serialization can be expressed in terms of
-the OutputStream primitives provided here.
-"""
-
-__author__ = 'robinson@google.com (Will Robinson)'
-
-import array
-import struct
-from google.protobuf import message
-from google.protobuf.internal import wire_format
-
-
-
-# Note that much of this code is ported from //net/proto/ProtocolBuffer, and
-# that the interface is strongly inspired by CodedOutputStream from the C++
-# proto2 implementation.
-
-
-class OutputStream(object):
-
- """Contains all logic for writing bits, and ToString() to get the result."""
-
- def __init__(self):
- self._buffer = array.array('B')
-
- def AppendRawBytes(self, raw_bytes):
- """Appends raw_bytes to our internal buffer."""
- self._buffer.fromstring(raw_bytes)
-
- def AppendLittleEndian32(self, unsigned_value):
- """Appends an unsigned 32-bit integer to the internal buffer,
- in little-endian byte order.
- """
- if not 0 <= unsigned_value <= wire_format.UINT32_MAX:
- raise message.EncodeError(
- 'Unsigned 32-bit out of range: %d' % unsigned_value)
- self._buffer.fromstring(struct.pack(
- wire_format.FORMAT_UINT32_LITTLE_ENDIAN, unsigned_value))
-
- def AppendLittleEndian64(self, unsigned_value):
- """Appends an unsigned 64-bit integer to the internal buffer,
- in little-endian byte order.
- """
- if not 0 <= unsigned_value <= wire_format.UINT64_MAX:
- raise message.EncodeError(
- 'Unsigned 64-bit out of range: %d' % unsigned_value)
- self._buffer.fromstring(struct.pack(
- wire_format.FORMAT_UINT64_LITTLE_ENDIAN, unsigned_value))
-
- def AppendVarint32(self, value):
- """Appends a signed 32-bit integer to the internal buffer,
- encoded as a varint. (Note that a negative varint32 will
- always require 10 bytes of space.)
- """
- if not wire_format.INT32_MIN <= value <= wire_format.INT32_MAX:
- raise message.EncodeError('Value out of range: %d' % value)
- self.AppendVarint64(value)
-
- def AppendVarUInt32(self, value):
- """Appends an unsigned 32-bit integer to the internal buffer,
- encoded as a varint.
- """
- if not 0 <= value <= wire_format.UINT32_MAX:
- raise message.EncodeError('Value out of range: %d' % value)
- self.AppendVarUInt64(value)
-
- def AppendVarint64(self, value):
- """Appends a signed 64-bit integer to the internal buffer,
- encoded as a varint.
- """
- if not wire_format.INT64_MIN <= value <= wire_format.INT64_MAX:
- raise message.EncodeError('Value out of range: %d' % value)
- if value < 0:
- value += (1 << 64)
- self.AppendVarUInt64(value)
-
- def AppendVarUInt64(self, unsigned_value):
- """Appends an unsigned 64-bit integer to the internal buffer,
- encoded as a varint.
- """
- if not 0 <= unsigned_value <= wire_format.UINT64_MAX:
- raise message.EncodeError('Value out of range: %d' % unsigned_value)
- while True:
- bits = unsigned_value & 0x7f
- unsigned_value >>= 7
- if not unsigned_value:
- self._buffer.append(bits)
- break
- self._buffer.append(0x80|bits)
-
- def ToString(self):
- """Returns a string containing the bytes in our internal buffer."""
- return self._buffer.tostring()