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Diffstat (limited to 'python/google/protobuf/internal/output_stream.py')
-rwxr-xr-x | python/google/protobuf/internal/output_stream.py | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/python/google/protobuf/internal/output_stream.py b/python/google/protobuf/internal/output_stream.py deleted file mode 100755 index 6c2d6f6..0000000 --- a/python/google/protobuf/internal/output_stream.py +++ /dev/null @@ -1,125 +0,0 @@ -# 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() |