annotate Applications/StoneWebViewer/WebAssembly/ParseWebAssemblyExports.py @ 1923:f4cdcba8c32a

sync
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Mar 2022 17:39:19 +0100
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1 #!/usr/bin/env python
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2
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3 # Stone of Orthanc
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4 # Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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5 # Department, University Hospital of Liege, Belgium
1871
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6 # Copyright (C) 2017-2022 Osimis S.A., Belgium
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7 # Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 #
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9 # This program is free software: you can redistribute it and/or
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10 # modify it under the terms of the GNU Affero General Public License
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11 # as published by the Free Software Foundation, either version 3 of
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12 # the License, or (at your option) any later version.
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13 #
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14 # This program is distributed in the hope that it will be useful, but
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15 # WITHOUT ANY WARRANTY; without even the implied warranty of
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16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 # Affero General Public License for more details.
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18 #
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19 # You should have received a copy of the GNU Affero General Public License
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20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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22
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23 # Ubuntu 20.04:
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24 # sudo apt-get install python-clang-6.0
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25 # ./ParseWebAssemblyExports.py --libclang=libclang-6.0.so.1 ./Test.cpp
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27 # Ubuntu 18.04:
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28 # sudo apt-get install python-clang-4.0
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29 # ./ParseWebAssemblyExports.py --libclang=libclang-4.0.so.1 ./Test.cpp
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31 # Ubuntu 14.04:
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32 # ./ParseWebAssemblyExports.py --libclang=libclang-3.6.so.1 ./Test.cpp
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34
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35 import sys
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36 import clang.cindex
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37 import pystache
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38 import argparse
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39
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40 ##
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41 ## Parse the command-line arguments
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42 ##
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43
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44 parser = argparse.ArgumentParser(description = 'Parse WebAssembly C++ source file, and create a basic JavaScript wrapper.')
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45 parser.add_argument('--libclang',
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46 default = '',
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47 help = 'manually provides the path to the libclang shared library')
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48 parser.add_argument('source',
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49 help = 'Input C++ file')
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50
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51 args = parser.parse_args()
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55 if len(args.libclang) != 0:
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56 clang.cindex.Config.set_library_file(args.libclang)
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57
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58 index = clang.cindex.Index.create()
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59
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60 # PARSE_SKIP_FUNCTION_BODIES prevents clang from failing because of
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61 # undefined types, which prevents compilation of functions
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62 tu = index.parse(args.source,
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63 [ '-DEMSCRIPTEN_KEEPALIVE=__attribute__((annotate("WebAssembly")))',
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64 '-DSTONE_WEB_VIEWER_EXPORT=__attribute__((annotate("WebAssembly")))'],
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65 options = clang.cindex.TranslationUnit.PARSE_SKIP_FUNCTION_BODIES)
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68
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69 TEMPLATE = '''
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70 const Stone = function() {
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71 {{#enumerations}}
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72 this.{{name}} = {
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73 {{#values}}
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74 {{name}}: {{value}}{{separator}}
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75 {{/values}}
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76 };
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77
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78 {{/enumerations}}
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79 {{#functions}}
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80 this._{{name}} = undefined;
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81 {{/functions}}
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82 };
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83
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84 Stone.prototype.Setup = function(Module) {
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85 {{#functions}}
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86 this._{{name}} = Module.cwrap('{{name}}', {{{returnType}}}, [ {{#args}}{{{type}}}{{^last}}, {{/last}}{{/args}} ]);
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87 {{/functions}}
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88 };
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89
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90 {{#functions}}
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91 Stone.prototype.{{name}} = function({{#args}}{{name}}{{^last}}, {{/last}}{{/args}}) {
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92 {{#hasReturn}}return {{/hasReturn}}this._{{name}}({{#args}}{{name}}{{^last}}, {{/last}}{{/args}});
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93 };
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94
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95 {{/functions}}
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96 var stone = new Stone();
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97 '''
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98
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99
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100
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101
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102 # WARNING: Undefined types are mapped as "int"
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103
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104 functions = []
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105 enumerations = []
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106
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107 def ToUpperCase(source):
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108 target = source[0]
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109 for c in source[1:]:
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110 if c.isupper():
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111 target += '_'
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112 target += c.upper()
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113 return target
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114
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115
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116
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117 def IsExported(node):
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118 for child in node.get_children():
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119 if (child.kind == clang.cindex.CursorKind.ANNOTATE_ATTR and
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120 child.displayname == 'WebAssembly'):
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121 return True
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122
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123 return False
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124
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125
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126 def Explore(node):
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127 if node.kind == clang.cindex.CursorKind.ENUM_DECL:
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128 if IsExported(node):
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129 name = node.spelling
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130 values = []
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131 for value in node.get_children():
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132 if (value.spelling.startswith(name + '_')):
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133 s = value.spelling[len(name) + 1:]
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134 if len(values) > 0:
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135 values[-1]['separator'] = ','
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136 values.append({
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137 'name' : ToUpperCase(s),
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138 'value' : value.enum_value
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139 })
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140
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141 enumerations.append({
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142 'name' : name,
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143 'values' : values
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144 })
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145
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146 if node.kind == clang.cindex.CursorKind.FUNCTION_DECL:
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147 if IsExported(node):
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148 f = {
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149 'name' : node.spelling,
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150 'args' : [],
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151 }
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152
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153 returnType = node.result_type.spelling
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154 if returnType == 'void':
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155 f['hasReturn'] = False
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156 f['returnType'] = "null"
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157 elif returnType == 'const char *':
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158 f['hasReturn'] = True
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159 f['returnType'] = "'string'"
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160 elif returnType in [ 'int', 'unsigned int' ]:
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161 f['hasReturn'] = True
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162 f['returnType'] = "'int'"
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163 else:
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164 raise Exception('Unknown return type in function "%s()": %s' % (node.spelling, returnType))
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165
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166 for child in node.get_children():
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167 if child.kind == clang.cindex.CursorKind.PARM_DECL:
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168 arg = {
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169 'name' : child.displayname,
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170 }
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171
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172 argType = child.type.spelling
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173 if argType == 'int':
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174 arg['type'] = "'int'"
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175 elif argType == 'const char *':
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176 arg['type'] = "'string'"
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177 else:
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178 raise Exception('Unknown type for argument "%s" in function "%s()": %s' %
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179 (child.displayname, node.spelling, argType))
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180
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181 f['args'].append(arg)
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182
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183 if len(f['args']) != 0:
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184 f['args'][-1]['last'] = True
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185
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186 functions.append(f)
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187
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188 for child in node.get_children():
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189 Explore(child)
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190
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191 Explore(tu.cursor)
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192
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193
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194
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195 print(pystache.render(TEMPLATE, {
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196 'functions' : functions,
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197 'enumerations' : enumerations
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198 }))