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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() | ||