Mercurial > repos > yating-l > jbrowsearchivecreator

annotate test/lib/python2.7/encodings/punycode.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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3
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1 # -*- coding: iso-8859-1 -*-
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2 """ Codec for the Punicode encoding, as specified in RFC 3492
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3
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4 Written by Martin v. Löwis.
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5 """
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6
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7 import codecs
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8
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9 ##################### Encoding #####################################
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10
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11 def segregate(str):
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12 """3.1 Basic code point segregation"""
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13 base = []
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14 extended = {}
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15 for c in str:
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16 if ord(c) < 128:
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17 base.append(c)
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18 else:
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19 extended[c] = 1
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20 extended = extended.keys()
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21 extended.sort()
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22 return "".join(base).encode("ascii"),extended
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23
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24 def selective_len(str, max):
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25 """Return the length of str, considering only characters below max."""
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26 res = 0
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27 for c in str:
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28 if ord(c) < max:
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29 res += 1
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30 return res
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31
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32 def selective_find(str, char, index, pos):
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33 """Return a pair (index, pos), indicating the next occurrence of
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34 char in str. index is the position of the character considering
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35 only ordinals up to and including char, and pos is the position in
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36 the full string. index/pos is the starting position in the full
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37 string."""
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38
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39 l = len(str)
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40 while 1:
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41 pos += 1
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42 if pos == l:
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43 return (-1, -1)
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44 c = str[pos]
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45 if c == char:
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46 return index+1, pos
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47 elif c < char:
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48 index += 1
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49
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50 def insertion_unsort(str, extended):
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51 """3.2 Insertion unsort coding"""
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52 oldchar = 0x80
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53 result = []
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54 oldindex = -1
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55 for c in extended:
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56 index = pos = -1
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57 char = ord(c)
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58 curlen = selective_len(str, char)
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59 delta = (curlen+1) * (char - oldchar)
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60 while 1:
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61 index,pos = selective_find(str,c,index,pos)
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62 if index == -1:
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63 break
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64 delta += index - oldindex
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65 result.append(delta-1)
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66 oldindex = index
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67 delta = 0
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68 oldchar = char
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69
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70 return result
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71
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72 def T(j, bias):
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73 # Punycode parameters: tmin = 1, tmax = 26, base = 36
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74 res = 36 * (j + 1) - bias
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75 if res < 1: return 1
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76 if res > 26: return 26
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77 return res
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78
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79 digits = "abcdefghijklmnopqrstuvwxyz0123456789"
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80 def generate_generalized_integer(N, bias):
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81 """3.3 Generalized variable-length integers"""
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82 result = []
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83 j = 0
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84 while 1:
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85 t = T(j, bias)
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86 if N < t:
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87 result.append(digits[N])
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88 return result
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89 result.append(digits[t + ((N - t) % (36 - t))])
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90 N = (N - t) // (36 - t)
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91 j += 1
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92
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93 def adapt(delta, first, numchars):
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parents:
diff changeset
94 if first:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
95 delta //= 700
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
96 else:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
97 delta //= 2
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yating-l
parents:
diff changeset
98 delta += delta // numchars
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
99 # ((base - tmin) * tmax) // 2 == 455
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
100 divisions = 0
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
101 while delta > 455:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
102 delta = delta // 35 # base - tmin
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
103 divisions += 36
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
104 bias = divisions + (36 * delta // (delta + 38))
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
105 return bias
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
106
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
107
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
108 def generate_integers(baselen, deltas):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
109 """3.4 Bias adaptation"""
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
110 # Punycode parameters: initial bias = 72, damp = 700, skew = 38
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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111 result = []
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
112 bias = 72
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
113 for points, delta in enumerate(deltas):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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114 s = generate_generalized_integer(delta, bias)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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115 result.extend(s)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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116 bias = adapt(delta, points==0, baselen+points+1)
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yating-l
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117 return "".join(result)
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yating-l
parents:
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118
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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119 def punycode_encode(text):
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yating-l
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120 base, extended = segregate(text)
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yating-l
parents:
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121 base = base.encode("ascii")
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yating-l
parents:
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122 deltas = insertion_unsort(text, extended)
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yating-l
parents:
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123 extended = generate_integers(len(base), deltas)
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yating-l
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124 if base:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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125 return base + "-" + extended
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yating-l
parents:
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126 return extended
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yating-l
parents:
diff changeset
127
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yating-l
parents:
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128 ##################### Decoding #####################################
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yating-l
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129
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yating-l
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130 def decode_generalized_number(extended, extpos, bias, errors):
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yating-l
parents:
diff changeset
131 """3.3 Generalized variable-length integers"""
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yating-l
parents:
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132 result = 0
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yating-l
parents:
diff changeset
133 w = 1
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yating-l
parents:
diff changeset
134 j = 0
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yating-l
parents:
diff changeset
135 while 1:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
136 try:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
137 char = ord(extended[extpos])
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yating-l
parents:
diff changeset
138 except IndexError:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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139 if errors == "strict":
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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140 raise UnicodeError, "incomplete punicode string"
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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141 return extpos + 1, None
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yating-l
parents:
diff changeset
142 extpos += 1
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
143 if 0x41 <= char <= 0x5A: # A-Z
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
144 digit = char - 0x41
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
145 elif 0x30 <= char <= 0x39:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
146 digit = char - 22 # 0x30-26
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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147 elif errors == "strict":
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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148 raise UnicodeError("Invalid extended code point '%s'"
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yating-l
parents:
diff changeset
149 % extended[extpos])
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
150 else:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
151 return extpos, None
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
152 t = T(j, bias)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
153 result += digit * w
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yating-l
parents:
diff changeset
154 if digit < t:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
155 return extpos, result
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
156 w = w * (36 - t)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
157 j += 1
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
158
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
159
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yating-l
parents:
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160 def insertion_sort(base, extended, errors):
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yating-l
parents:
diff changeset
161 """3.2 Insertion unsort coding"""
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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162 char = 0x80
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
163 pos = -1
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yating-l
parents:
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164 bias = 72
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
165 extpos = 0
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yating-l
parents:
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166 while extpos < len(extended):
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yating-l
parents:
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167 newpos, delta = decode_generalized_number(extended, extpos,
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
168 bias, errors)
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yating-l
parents:
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169 if delta is None:
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yating-l
parents:
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170 # There was an error in decoding. We can't continue because
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yating-l
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171 # synchronization is lost.
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yating-l
parents:
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172 return base
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
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173 pos += delta+1
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yating-l
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174 char += pos // (len(base) + 1)
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yating-l
parents:
diff changeset
175 if char > 0x10FFFF:
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yating-l
parents:
diff changeset
176 if errors == "strict":
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yating-l
parents:
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177 raise UnicodeError, ("Invalid character U+%x" % char)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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178 char = ord('?')
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yating-l
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179 pos = pos % (len(base) + 1)
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yating-l
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180 base = base[:pos] + unichr(char) + base[pos:]
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yating-l
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181 bias = adapt(delta, (extpos == 0), len(base))
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yating-l
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182 extpos = newpos
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yating-l
parents:
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183 return base
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
parents:
diff changeset
184
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yating-l
parents:
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185 def punycode_decode(text, errors):
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yating-l
parents:
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186 pos = text.rfind("-")
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187 if pos == -1:
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188 base = ""
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189 extended = text
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190 else:
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191 base = text[:pos]
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192 extended = text[pos+1:]
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193 base = unicode(base, "ascii", errors)
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194 extended = extended.upper()
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195 return insertion_sort(base, extended, errors)
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196
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197 ### Codec APIs
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198
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199 class Codec(codecs.Codec):
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200
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201 def encode(self,input,errors='strict'):
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202 res = punycode_encode(input)
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203 return res, len(input)
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204
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205 def decode(self,input,errors='strict'):
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206 if errors not in ('strict', 'replace', 'ignore'):
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207 raise UnicodeError, "Unsupported error handling "+errors
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208 res = punycode_decode(input, errors)
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209 return res, len(input)
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210
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211 class IncrementalEncoder(codecs.IncrementalEncoder):
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212 def encode(self, input, final=False):
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213 return punycode_encode(input)
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214
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215 class IncrementalDecoder(codecs.IncrementalDecoder):
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216 def decode(self, input, final=False):
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217 if self.errors not in ('strict', 'replace', 'ignore'):
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218 raise UnicodeError, "Unsupported error handling "+self.errors
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219 return punycode_decode(input, self.errors)
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220
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221 class StreamWriter(Codec,codecs.StreamWriter):
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222 pass
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223
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224 class StreamReader(Codec,codecs.StreamReader):
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225 pass
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226
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227 ### encodings module API
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228
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229 def getregentry():
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230 return codecs.CodecInfo(
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231 name='punycode',
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232 encode=Codec().encode,
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233 decode=Codec().decode,
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234 incrementalencoder=IncrementalEncoder,
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235 incrementaldecoder=IncrementalDecoder,
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236 streamwriter=StreamWriter,
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237 streamreader=StreamReader,
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238 )