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Diffstat (limited to 'froofle/protobuf/internal/output_stream.py')
| -rw-r--r-- | froofle/protobuf/internal/output_stream.py | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/froofle/protobuf/internal/output_stream.py b/froofle/protobuf/internal/output_stream.py deleted file mode 100644 index f62cd1c4..00000000 --- a/froofle/protobuf/internal/output_stream.py +++ /dev/null | |||
| @@ -1,125 +0,0 @@ | |||
| 1 | # Protocol Buffers - Google's data interchange format | ||
| 2 | # Copyright 2008 Google Inc. All rights reserved. | ||
| 3 | # http://code.google.com/p/protobuf/ | ||
| 4 | # | ||
| 5 | # Redistribution and use in source and binary forms, with or without | ||
| 6 | # modification, are permitted provided that the following conditions are | ||
| 7 | # met: | ||
| 8 | # | ||
| 9 | # * Redistributions of source code must retain the above copyright | ||
| 10 | # notice, this list of conditions and the following disclaimer. | ||
| 11 | # * Redistributions in binary form must reproduce the above | ||
| 12 | # copyright notice, this list of conditions and the following disclaimer | ||
| 13 | # in the documentation and/or other materials provided with the | ||
| 14 | # distribution. | ||
| 15 | # * Neither the name of Google Inc. nor the names of its | ||
| 16 | # contributors may be used to endorse or promote products derived from | ||
| 17 | # this software without specific prior written permission. | ||
| 18 | # | ||
| 19 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| 20 | # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| 21 | # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| 22 | # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| 23 | # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| 24 | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| 25 | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| 26 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| 27 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| 28 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| 29 | # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| 30 | |||
| 31 | """OutputStream is the primitive interface for sticking bits on the wire. | ||
| 32 | |||
| 33 | All protocol buffer serialization can be expressed in terms of | ||
| 34 | the OutputStream primitives provided here. | ||
| 35 | """ | ||
| 36 | |||
| 37 | __author__ = 'robinson@google.com (Will Robinson)' | ||
| 38 | |||
| 39 | import array | ||
| 40 | import struct | ||
| 41 | from froofle.protobuf import message | ||
| 42 | from froofle.protobuf.internal import wire_format | ||
| 43 | |||
| 44 | |||
| 45 | |||
| 46 | # Note that much of this code is ported from //net/proto/ProtocolBuffer, and | ||
| 47 | # that the interface is strongly inspired by CodedOutputStream from the C++ | ||
| 48 | # proto2 implementation. | ||
| 49 | |||
| 50 | |||
| 51 | class OutputStream(object): | ||
| 52 | |||
| 53 | """Contains all logic for writing bits, and ToString() to get the result.""" | ||
| 54 | |||
| 55 | def __init__(self): | ||
| 56 | self._buffer = array.array('B') | ||
| 57 | |||
| 58 | def AppendRawBytes(self, raw_bytes): | ||
| 59 | """Appends raw_bytes to our internal buffer.""" | ||
| 60 | self._buffer.fromstring(raw_bytes) | ||
| 61 | |||
| 62 | def AppendLittleEndian32(self, unsigned_value): | ||
| 63 | """Appends an unsigned 32-bit integer to the internal buffer, | ||
| 64 | in little-endian byte order. | ||
| 65 | """ | ||
| 66 | if not 0 <= unsigned_value <= wire_format.UINT32_MAX: | ||
| 67 | raise message.EncodeError( | ||
| 68 | 'Unsigned 32-bit out of range: %d' % unsigned_value) | ||
| 69 | self._buffer.fromstring(struct.pack( | ||
| 70 | wire_format.FORMAT_UINT32_LITTLE_ENDIAN, unsigned_value)) | ||
| 71 | |||
| 72 | def AppendLittleEndian64(self, unsigned_value): | ||
| 73 | """Appends an unsigned 64-bit integer to the internal buffer, | ||
| 74 | in little-endian byte order. | ||
| 75 | """ | ||
| 76 | if not 0 <= unsigned_value <= wire_format.UINT64_MAX: | ||
| 77 | raise message.EncodeError( | ||
| 78 | 'Unsigned 64-bit out of range: %d' % unsigned_value) | ||
| 79 | self._buffer.fromstring(struct.pack( | ||
| 80 | wire_format.FORMAT_UINT64_LITTLE_ENDIAN, unsigned_value)) | ||
| 81 | |||
| 82 | def AppendVarint32(self, value): | ||
| 83 | """Appends a signed 32-bit integer to the internal buffer, | ||
| 84 | encoded as a varint. (Note that a negative varint32 will | ||
| 85 | always require 10 bytes of space.) | ||
| 86 | """ | ||
| 87 | if not wire_format.INT32_MIN <= value <= wire_format.INT32_MAX: | ||
| 88 | raise message.EncodeError('Value out of range: %d' % value) | ||
| 89 | self.AppendVarint64(value) | ||
| 90 | |||
| 91 | def AppendVarUInt32(self, value): | ||
| 92 | """Appends an unsigned 32-bit integer to the internal buffer, | ||
| 93 | encoded as a varint. | ||
| 94 | """ | ||
| 95 | if not 0 <= value <= wire_format.UINT32_MAX: | ||
| 96 | raise message.EncodeError('Value out of range: %d' % value) | ||
| 97 | self.AppendVarUInt64(value) | ||
| 98 | |||
| 99 | def AppendVarint64(self, value): | ||
| 100 | """Appends a signed 64-bit integer to the internal buffer, | ||
| 101 | encoded as a varint. | ||
| 102 | """ | ||
| 103 | if not wire_format.INT64_MIN <= value <= wire_format.INT64_MAX: | ||
| 104 | raise message.EncodeError('Value out of range: %d' % value) | ||
| 105 | if value < 0: | ||
| 106 | value += (1 << 64) | ||
| 107 | self.AppendVarUInt64(value) | ||
| 108 | |||
| 109 | def AppendVarUInt64(self, unsigned_value): | ||
| 110 | """Appends an unsigned 64-bit integer to the internal buffer, | ||
| 111 | encoded as a varint. | ||
| 112 | """ | ||
| 113 | if not 0 <= unsigned_value <= wire_format.UINT64_MAX: | ||
| 114 | raise message.EncodeError('Value out of range: %d' % unsigned_value) | ||
| 115 | while True: | ||
| 116 | bits = unsigned_value & 0x7f | ||
| 117 | unsigned_value >>= 7 | ||
| 118 | if not unsigned_value: | ||
| 119 | self._buffer.append(bits) | ||
| 120 | break | ||
| 121 | self._buffer.append(0x80|bits) | ||
| 122 | |||
| 123 | def ToString(self): | ||
| 124 | """Returns a string containing the bytes in our internal buffer.""" | ||
| 125 | return self._buffer.tostring() | ||
