Mercurial > hg > ooxml

annotate eDecoder.py @ 72:0654e37583b5

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appears to read kdir.js correctly
author Henry S. Thompson <ht@markup.co.uk>
date Thu, 29 Jun 2017 17:58:06 +0100
parents 54bb53434887
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
71
54bb53434887 begin work on decoder that allows identifiers as keys and values
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1 '''Extend JSON to support atoms as properties and class names'''
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2 from json import decoder
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3 from json.decoder import JSONDecoder, JSONObject, JSONArray,\
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4 _CONSTANTS, WHITESPACE, WHITESPACE_STR, FLAGS, errmsg
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5
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6 import json, re
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7
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8 JSONObject_orig=JSONObject
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9 JSONArray_orig=JSONArray
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10
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11 class eDecoder(JSONDecoder):
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12 def __init__(self, encoding=None, object_hook=None, parse_float=None,
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13 parse_int=None, parse_constant=None, strict=True,
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14 object_pairs_hook=None):
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15
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16 self.parse_object = eJSONObject
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17 super(eDecoder,self).__init__(encoding, object_hook, parse_float,
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18 parse_int, e_parse_constant, strict,
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19 object_pairs_hook)
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20
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21 def e_parse_constant(istr):
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22 print('constant: %s'%istr)
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23 return _CONSTANTS[istr]
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24
72
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25 IDENT=re.compile(r'[$]?[A-Z]+[$]?[0-9]+([:][$]?[A-Z]+[$]?[0-9]+)|[a-zA-Z0-9_.-]+', FLAGS)
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26
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27 def eJSONArray(s_and_end, scan_once, _w=WHITESPACE.match, _ws=WHITESPACE_STR):
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28 s, end = s_and_end
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29 values = []
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30 nextchar = s[end:end + 1]
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31 if nextchar in _ws:
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32 end = _w(s, end + 1).end()
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33 nextchar = s[end:end + 1]
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34 # Look-ahead for trivial empty array
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35 if nextchar == ']':
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36 return values, end + 1
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37 _append = values.append
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38 while True:
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39 try:
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40 value, end = scan_once(s, end)
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41 except StopIteration:
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42 # Two possible causes: string empty, or no ident here
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43 # Either way, the match will fail and the (original) value error is correct
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44 isId = IDENT.match(s,end)
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45 if isId:
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46 value=isId.group()
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47 end=isId.end()
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48 else:
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49 raise ValueError(errmsg("Expecting object", s, end))
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50 _append(value)
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51 nextchar = s[end:end + 1]
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52 if nextchar in _ws:
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53 end = _w(s, end + 1).end()
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54 nextchar = s[end:end + 1]
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55 end += 1
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56 if nextchar == ']':
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57 break
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58 elif nextchar != ',':
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59 raise ValueError(errmsg("Expecting ',' delimiter", s, end))
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60 try:
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61 if s[end] in _ws:
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62 end += 1
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63 if s[end] in _ws:
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64 end = _w(s, end + 1).end()
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65 except IndexError:
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66 pass
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67
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68 return values, end
71
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69
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70 def eJSONObject(s_and_end, encoding, strict, scan_once, object_hook,
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71 object_pairs_hook, _w=WHITESPACE.match, _ws=WHITESPACE_STR):
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72 s, end = s_and_end
72
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73 pairs = []
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74 pairs_append = pairs.append
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75 # Use a slice to prevent IndexError from being raised, the following
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76 # check will raise a more specific ValueError if the string is empty
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77 nextchar = s[end:end + 1]
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78 # Normally we expect nextchar == '"'
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79 if nextchar != '"':
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80 if nextchar in _ws:
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81 end = _w(s, end).end()
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82 nextchar = s[end:end + 1]
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83 # Trivial empty object
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84 if nextchar == '}':
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85 if object_pairs_hook is not None:
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86 result = object_pairs_hook(pairs)
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87 return result, end + 1
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88 pairs = {}
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89 if object_hook is not None:
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90 pairs = object_hook(pairs)
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91 return pairs, end + 1
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92 while True:
72
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93 if nextchar=='"':
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94 key, end = scanstring(s, end, encoding, strict)
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95 else:
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96 isId = IDENT.match(s,end)
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97 if isId:
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98 key=isId.group()
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99 end=isId.end()
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100 else:
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101 raise ValueError(errmsg(
0654e37583b5 appears to read kdir.js correctly
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102 "Expecting property name with or w/o double quotes", s, end))
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103 # To skip some function call overhead we optimize the fast paths where
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104 # the JSON key separator is ": " or just ":".
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105 if s[end:end + 1] != ':':
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106 end = _w(s, end).end()
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107 if s[end:end + 1] != ':':
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108 raise ValueError(errmsg("Expecting ':' delimiter", s, end))
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109 end += 1
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110
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111 try:
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112 if s[end] in _ws:
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113 end += 1
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114 if s[end] in _ws:
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115 end = _w(s, end + 1).end()
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116 except IndexError:
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117 pass
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118
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119 try:
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120 value, end = scan_once(s, end)
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121 except StopIteration:
72
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122 # Two possible causes: string empty, or no ident here
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123 # Either way, the match will fail and the (original) value error is correct
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124 isId = IDENT.match(s,end)
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125 if isId:
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126 value=isId.group()
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127 end=isId.end()
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128 else:
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129 raise ValueError(errmsg("Expecting object", s, end))
71
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130 pairs_append((key, value))
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131
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132 try:
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133 nextchar = s[end]
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134 if nextchar in _ws:
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135 end = _w(s, end + 1).end()
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136 nextchar = s[end]
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137 except IndexError:
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138 nextchar = ''
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139 end += 1
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140
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141 if nextchar == '}':
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142 break
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143 elif nextchar != ',':
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144 raise ValueError(errmsg("Expecting ',' delimiter", s, end - 1))
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145
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146 try:
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147 nextchar = s[end]
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
148 if nextchar in _ws:
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
149 end += 1
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
150 nextchar = s[end]
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
151 if nextchar in _ws:
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
152 end = _w(s, end + 1).end()
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
153 nextchar = s[end]
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
154 except IndexError:
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
155 nextchar = ''
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
156
72
0654e37583b5 appears to read kdir.js correctly
Henry S. Thompson <ht@markup.co.uk>
parents: 71
diff changeset
157 if nextchar=='"':
0654e37583b5 appears to read kdir.js correctly
Henry S. Thompson <ht@markup.co.uk>
parents: 71
diff changeset
158 end += 1
71
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
159 if object_pairs_hook is not None:
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
160 result = object_pairs_hook(pairs)
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
161 return result, end
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
162 pairs = dict(pairs)
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
163 if object_hook is not None:
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
164 pairs = object_hook(pairs)
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
165 return pairs, end
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
166
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
167
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
168 json.scanner.make_scanner=json.scanner.py_make_scanner
54bb53434887 begin work on decoder that allows identifiers as keys and values
Henry S. Thompson <ht@markup.co.uk>
parents:
diff changeset
169 json.decoder.JSONObject=eJSONObject
72
0654e37583b5 appears to read kdir.js correctly
Henry S. Thompson <ht@markup.co.uk>
parents: 71
diff changeset
170 json.decoder.JSONArray=eJSONArray