~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
# bencode structured encoding
#
# Written by Petru Paler
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# The Software is provided "AS IS", without warranty of any kind,
# express or implied, including but not limited to the warranties of
# merchantability,  fitness for a particular purpose and
# noninfringement. In no event shall the  authors or copyright holders
# be liable for any claim, damages or other liability, whether in an
# action of contract, tort or otherwise, arising from, out of or in
# connection with the Software or the use or other dealings in the
# Software.

def decode_int(x, f):
    f += 1
    newf = x.index('e', f)
    try:
        n = int(x[f:newf])
    except (OverflowError, ValueError):
        n = long(x[f:newf])
    if x[f] == '-':
        if x[f + 1] == '0':
            raise ValueError
    elif x[f] == '0' and newf != f+1:
        raise ValueError
    return (n, newf+1)

def decode_string(x, f):
    colon = x.index(':', f)
    try:
        n = int(x[f:colon])
    except (OverflowError, ValueError):
        n = long(x[f:colon])
    if x[f] == '0' and colon != f+1:
        raise ValueError
    colon += 1
    return (x[colon:colon+n], colon+n)

def decode_list(x, f):
    r, f = [], f+1
    while x[f] != 'e':
        v, f = decode_func[x[f]](x, f)
        r.append(v)
    return (r, f + 1)

def decode_dict(x, f):
    r, f = {}, f+1
    lastkey = None
    while x[f] != 'e':
        k, f = decode_string(x, f)
        if lastkey >= k:
            raise ValueError
        lastkey = k
        r[k], f = decode_func[x[f]](x, f)
    return (r, f + 1)

decode_func = {}
decode_func['l'] = decode_list
decode_func['d'] = decode_dict
decode_func['i'] = decode_int
decode_func['0'] = decode_string
decode_func['1'] = decode_string
decode_func['2'] = decode_string
decode_func['3'] = decode_string
decode_func['4'] = decode_string
decode_func['5'] = decode_string
decode_func['6'] = decode_string
decode_func['7'] = decode_string
decode_func['8'] = decode_string
decode_func['9'] = decode_string

def bdecode(x):
    try:
        r, l = decode_func[x[0]](x, 0)
    except (IndexError, KeyError):
        raise ValueError
    if l != len(x):
        raise ValueError
    return r

def test_bdecode():
    try:
        bdecode('0:0:')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('ie')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('i341foo382e')
        assert 0
    except ValueError:
        pass
    assert bdecode('i4e') == 4L
    assert bdecode('i0e') == 0L
    assert bdecode('i123456789e') == 123456789L
    assert bdecode('i-10e') == -10L
    try:
        bdecode('i-0e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('i123')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('i6easd')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('35208734823ljdahflajhdf')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('2:abfdjslhfld')
        assert 0
    except ValueError:
        pass
    assert bdecode('0:') == ''
    assert bdecode('3:abc') == 'abc'
    assert bdecode('10:1234567890') == '1234567890'
    try:
        bdecode('02:xy')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('l')
        assert 0
    except ValueError:
        pass
    assert bdecode('le') == []
    try:
        bdecode('leanfdldjfh')
        assert 0
    except ValueError:
        pass
    assert bdecode('l0:0:0:e') == ['', '', '']
    try:
        bdecode('relwjhrlewjh')
        assert 0
    except ValueError:
        pass
    assert bdecode('li1ei2ei3ee') == [1, 2, 3]
    assert bdecode('l3:asd2:xye') == ['asd', 'xy']
    assert bdecode('ll5:Alice3:Bobeli2ei3eee') == [['Alice', 'Bob'], [2, 3]]
    try:
        bdecode('d')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('defoobar')
        assert 0
    except ValueError:
        pass
    assert bdecode('de') == {}
    assert bdecode('d3:agei25e4:eyes4:bluee') == {'age': 25, 'eyes': 'blue'}
    assert bdecode('d8:spam.mp3d6:author5:Alice6:lengthi100000eee') == {'spam.mp3': {'author': 'Alice', 'length': 100000}}
    try:
        bdecode('d3:fooe')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('di1e0:e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('d1:b0:1:a0:e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('d1:a0:1:a0:e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('i03e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('l01:ae')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('9999:x')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('l0:')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('d0:0:')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('d0:')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('00:')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('l-3:e')
        assert 0
    except ValueError:
        pass
    try:
        bdecode('i-03e')
        assert 0
    except ValueError:
        pass
    bdecode('d0:i3ee')

from types import StringType, IntType, LongType, DictType, ListType, TupleType

class Bencached(object):
    __slots__ = ['bencoded']

    def __init__(self, s):
        self.bencoded = s

def encode_bencached(x,r):
    r.append(x.bencoded)

def encode_int(x, r):
    r.extend(('i', str(x), 'e'))

def encode_string(x, r):
    r.extend((str(len(x)), ':', x))

def encode_list(x, r):
    r.append('l')
    for i in x:
        encode_func[type(i)](i, r)
    r.append('e')

def encode_dict(x,r):
    r.append('d')
    ilist = x.items()
    ilist.sort()
    for k, v in ilist:
        r.extend((str(len(k)), ':', k))
        encode_func[type(v)](v, r)
    r.append('e')

encode_func = {}
encode_func[type(Bencached(0))] = encode_bencached
encode_func[IntType] = encode_int
encode_func[LongType] = encode_int
encode_func[StringType] = encode_string
encode_func[ListType] = encode_list
encode_func[TupleType] = encode_list
encode_func[DictType] = encode_dict

try:
    from types import BooleanType
    encode_func[BooleanType] = encode_int
except ImportError:
    pass

def bencode(x):
    r = []
    encode_func[type(x)](x, r)
    return ''.join(r)

def test_bencode():
    assert bencode(4) == 'i4e'
    assert bencode(0) == 'i0e'
    assert bencode(-10) == 'i-10e'
    assert bencode(12345678901234567890L) == 'i12345678901234567890e'
    assert bencode('') == '0:'
    assert bencode('abc') == '3:abc'
    assert bencode('1234567890') == '10:1234567890'
    assert bencode([]) == 'le'
    assert bencode([1, 2, 3]) == 'li1ei2ei3ee'
    assert bencode([['Alice', 'Bob'], [2, 3]]) == 'll5:Alice3:Bobeli2ei3eee'
    assert bencode({}) == 'de'
    assert bencode({'age': 25, 'eyes': 'blue'}) == 'd3:agei25e4:eyes4:bluee'
    assert bencode({'spam.mp3': {'author': 'Alice', 'length': 100000}}) == 'd8:spam.mp3d6:author5:Alice6:lengthi100000eee'
    assert bencode(Bencached(bencode(3))) == 'i3e'
    try:
        bencode({1: 'foo'})
    except TypeError:
        return
    assert 0

try:
    import psyco
    psyco.bind(bdecode)
    psyco.bind(bencode)
except ImportError:
    pass