9
9
# publish, distribute, sublicense, and/or sell copies of the Software,
10
10
# and to permit persons to whom the Software is furnished to do so,
11
11
# subject to the following conditions:
13
13
# The above copyright notice and this permission notice shall be
14
14
# included in all copies or substantial portions of the Software.
16
# Modifications copyright (C) 2008 Canonical Ltd
18
from __future__ import absolute_import
23
class BDecoder(object):
25
def __init__(self, yield_tuples=False):
28
:param yield_tuples: if true, decode "l" elements as tuples rather than
31
self.yield_tuples = yield_tuples
33
decode_func[b'l'] = self.decode_list
34
decode_func[b'd'] = self.decode_dict
35
decode_func[b'i'] = self.decode_int
36
decode_func[b'0'] = self.decode_string
37
decode_func[b'1'] = self.decode_string
38
decode_func[b'2'] = self.decode_string
39
decode_func[b'3'] = self.decode_string
40
decode_func[b'4'] = self.decode_string
41
decode_func[b'5'] = self.decode_string
42
decode_func[b'6'] = self.decode_string
43
decode_func[b'7'] = self.decode_string
44
decode_func[b'8'] = self.decode_string
45
decode_func[b'9'] = self.decode_string
46
self.decode_func = decode_func
48
def decode_int(self, x, f):
50
newf = x.index(b'e', f)
16
# The Software is provided "AS IS", without warranty of any kind,
17
# express or implied, including but not limited to the warranties of
18
# merchantability, fitness for a particular purpose and
19
# noninfringement. In no event shall the authors or copyright holders
20
# be liable for any claim, damages or other liability, whether in an
21
# action of contract, tort or otherwise, arising from, out of or in
22
# connection with the Software or the use or other dealings in the
27
newf = x.index('e', f)
54
elif x[f:f+1] == b'0' and newf != f+1:
30
except (OverflowError, ValueError):
35
elif x[f] == '0' and newf != f+1:
58
def decode_string(self, x, f):
59
colon = x.index(b':', f)
39
def decode_string(x, f):
40
colon = x.index(':', f)
60
42
n = int(x[f:colon])
61
if x[f:f+1] == b'0' and colon != f+1:
64
return (x[colon:colon+n], colon+n)
66
def decode_list(self, x, f):
68
while x[f:f+1] != b'e':
69
v, f = self.decode_func[x[f:f+1]](x, f)
75
def decode_dict(self, x, f):
78
while x[f:f+1] != b'e':
79
k, f = self.decode_string(x, f)
80
if lastkey is not None and lastkey >= k:
83
r[k], f = self.decode_func[x[f:f+1]](x, f)
87
if not isinstance(x, bytes):
90
r, l = self.decode_func[x[:1]](x, 0)
91
except (IndexError, KeyError, OverflowError) as e:
92
raise ValueError(str(e))
99
bdecode = _decoder.bdecode
101
_tuple_decoder = BDecoder(True)
102
bdecode_as_tuple = _tuple_decoder.bdecode
43
except (OverflowError, ValueError):
45
if x[f] == '0' and colon != f+1:
48
return (x[colon:colon+n], colon+n)
50
def decode_list(x, f):
53
v, f = decode_func[x[f]](x, f)
57
def decode_dict(x, f):
61
k, f = decode_string(x, f)
65
r[k], f = decode_func[x[f]](x, f)
69
decode_func['l'] = decode_list
70
decode_func['d'] = decode_dict
71
decode_func['i'] = decode_int
72
decode_func['0'] = decode_string
73
decode_func['1'] = decode_string
74
decode_func['2'] = decode_string
75
decode_func['3'] = decode_string
76
decode_func['4'] = decode_string
77
decode_func['5'] = decode_string
78
decode_func['6'] = decode_string
79
decode_func['7'] = decode_string
80
decode_func['8'] = decode_string
81
decode_func['9'] = decode_string
85
r, l = decode_func[x[0]](x, 0)
86
except (IndexError, KeyError):
93
from types import StringType, IntType, LongType, DictType, ListType, TupleType
105
95
class Bencached(object):
106
96
__slots__ = ['bencoded']
108
98
def __init__(self, s):
112
def encode_bencached(x, r):
101
def encode_bencached(x,r):
113
102
r.append(x.bencoded)
115
def encode_bool(x, r):
116
encode_int(int(x), r)
118
104
def encode_int(x, r):
119
r.extend((b'i', int_to_bytes(x), b'e'))
105
r.extend(('i', str(x), 'e'))
121
107
def encode_string(x, r):
122
r.extend((int_to_bytes(len(x)), b':', x))
108
r.extend((str(len(x)), ':', x))
124
110
def encode_list(x, r):
127
113
encode_func[type(i)](i, r)
130
def encode_dict(x, r):
132
ilist = sorted(x.items())
116
def encode_dict(x,r):
133
120
for k, v in ilist:
134
r.extend((int_to_bytes(len(k)), b':', k))
121
r.extend((str(len(k)), ':', k))
135
122
encode_func[type(v)](v, r)
139
126
encode_func[type(Bencached(0))] = encode_bencached
140
encode_func[int] = encode_int
141
if sys.version_info < (3,):
142
encode_func[long] = encode_int
147
encode_func[bytes] = encode_string
148
encode_func[list] = encode_list
149
encode_func[tuple] = encode_list
150
encode_func[dict] = encode_dict
151
encode_func[bool] = encode_bool
127
encode_func[IntType] = encode_int
128
encode_func[LongType] = encode_int
129
encode_func[StringType] = encode_string
130
encode_func[ListType] = encode_list
131
encode_func[TupleType] = encode_list
132
encode_func[DictType] = encode_dict
153
from breezy._static_tuple_py import StaticTuple
154
encode_func[StaticTuple] = encode_list
156
from breezy._static_tuple_c import StaticTuple
135
from types import BooleanType
136
encode_func[BooleanType] = encode_int
157
137
except ImportError:
160
encode_func[StaticTuple] = encode_list
165
142
encode_func[type(x)](x, r)