Mercurial > repos > yating-l > jbrowsearchivecreator

annotate test/lib/python2.7/encodings/uu_codec.py @ 3:7d1a9a91b989 draft

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planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
author yating-l
date Thu, 18 May 2017 18:37:28 -0400
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1 """ Python 'uu_codec' Codec - UU content transfer encoding
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2
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3 Unlike most of the other codecs which target Unicode, this codec
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4 will return Python string objects for both encode and decode.
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5
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6 Written by Marc-Andre Lemburg (mal@lemburg.com). Some details were
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7 adapted from uu.py which was written by Lance Ellinghouse and
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8 modified by Jack Jansen and Fredrik Lundh.
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9
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10 """
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11 import codecs, binascii
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12
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13 ### Codec APIs
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15 def uu_encode(input,errors='strict',filename='<data>',mode=0666):
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17 """ Encodes the object input and returns a tuple (output
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18 object, length consumed).
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20 errors defines the error handling to apply. It defaults to
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21 'strict' handling which is the only currently supported
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22 error handling for this codec.
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24 """
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25 assert errors == 'strict'
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26 from cStringIO import StringIO
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27 from binascii import b2a_uu
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28 # using str() because of cStringIO's Unicode undesired Unicode behavior.
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29 infile = StringIO(str(input))
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30 outfile = StringIO()
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31 read = infile.read
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32 write = outfile.write
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33
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34 # Encode
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35 write('begin %o %s\n' % (mode & 0777, filename))
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36 chunk = read(45)
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37 while chunk:
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38 write(b2a_uu(chunk))
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39 chunk = read(45)
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40 write(' \nend\n')
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41
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42 return (outfile.getvalue(), len(input))
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44 def uu_decode(input,errors='strict'):
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45
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46 """ Decodes the object input and returns a tuple (output
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47 object, length consumed).
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48
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49 input must be an object which provides the bf_getreadbuf
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50 buffer slot. Python strings, buffer objects and memory
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51 mapped files are examples of objects providing this slot.
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52
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53 errors defines the error handling to apply. It defaults to
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54 'strict' handling which is the only currently supported
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55 error handling for this codec.
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56
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57 Note: filename and file mode information in the input data is
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58 ignored.
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59
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60 """
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61 assert errors == 'strict'
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62 from cStringIO import StringIO
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63 from binascii import a2b_uu
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64 infile = StringIO(str(input))
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65 outfile = StringIO()
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66 readline = infile.readline
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67 write = outfile.write
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68
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69 # Find start of encoded data
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70 while 1:
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71 s = readline()
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72 if not s:
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73 raise ValueError, 'Missing "begin" line in input data'
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74 if s[:5] == 'begin':
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75 break
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76
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77 # Decode
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78 while 1:
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79 s = readline()
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80 if not s or \
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81 s == 'end\n':
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82 break
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83 try:
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84 data = a2b_uu(s)
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85 except binascii.Error, v:
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86 # Workaround for broken uuencoders by /Fredrik Lundh
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87 nbytes = (((ord(s[0])-32) & 63) * 4 + 5) // 3
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88 data = a2b_uu(s[:nbytes])
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89 #sys.stderr.write("Warning: %s\n" % str(v))
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90 write(data)
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91 if not s:
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92 raise ValueError, 'Truncated input data'
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93
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94 return (outfile.getvalue(), len(input))
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95
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96 class Codec(codecs.Codec):
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97
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98 def encode(self,input,errors='strict'):
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99 return uu_encode(input,errors)
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100
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101 def decode(self,input,errors='strict'):
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102 return uu_decode(input,errors)
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103
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104 class IncrementalEncoder(codecs.IncrementalEncoder):
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105 def encode(self, input, final=False):
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106 return uu_encode(input, self.errors)[0]
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107
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108 class IncrementalDecoder(codecs.IncrementalDecoder):
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109 def decode(self, input, final=False):
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110 return uu_decode(input, self.errors)[0]
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111
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112 class StreamWriter(Codec,codecs.StreamWriter):
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113 pass
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114
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115 class StreamReader(Codec,codecs.StreamReader):
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116 pass
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117
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118 ### encodings module API
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119
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120 def getregentry():
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121 return codecs.CodecInfo(
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122 name='uu',
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123 encode=uu_encode,
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124 decode=uu_decode,
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125 incrementalencoder=IncrementalEncoder,
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126 incrementaldecoder=IncrementalDecoder,
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127 streamreader=StreamReader,
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128 streamwriter=StreamWriter,
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129 _is_text_encoding=False,
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130 )