1 #!/usr/bin/env python 2 # Copyright 2014 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 """Code generator for PlatformObject<> constructor list. 7 8 This script takes as arguments a list of platform names as a text file and 9 a list of types and generates a C++ source file containing a list of 10 the constructors for that object in platform order. 11 12 Example Output: ./ui/ozone/generate_constructor_list.py \ 13 --platform test \ 14 --platform dri \ 15 --export OZONE_EXPORT \ 16 --namespace ui \ 17 --typename OzonePlatform \ 18 --include '"ui/ozone/ozone_platform.h"' 19 20 // DO NOT MODIFY. GENERATED BY generate_constructor_list.py 21 22 #include "ui/ozone/platform_object_internal.h" 23 24 #include "ui/ozone/ozone_platform.h" 25 26 namespace ui { 27 28 OzonePlatform* CreateOzonePlatformTest(); 29 OzonePlatform* CreateOzonePlatformDri(); 30 31 } // namespace ui 32 33 namespace ui { 34 35 typedef ui::OzonePlatform* (*OzonePlatformConstructor)(); 36 37 template <> const OzonePlatformConstructor 38 PlatformConstructorList<ui::OzonePlatform>::kConstructors[] = { 39 &ui::CreateOzonePlatformTest, 40 &ui::CreateOzonePlatformDri, 41 }; 42 43 template class OZONE_EXPORT PlatformObject<ui::OzonePlatform>; 44 45 } // namespace ui 46 """ 47 48 import optparse 49 import os 50 import collections 51 import re 52 import sys 53 import string 54 55 56 def GetTypedefName(typename): 57 """Determine typedef name of constructor for typename. 58 59 This is just typename + "Constructor". 60 """ 61 62 return typename + 'Constructor' 63 64 65 def GetConstructorName(typename, platform): 66 """Determine name of static constructor function from platform name. 67 68 This is just "Create" + typename + platform. 69 """ 70 71 return 'Create' + typename + string.capitalize(platform) 72 73 74 def GenerateConstructorList(out, namespace, export, typenames, platforms, 75 includes): 76 """Generate static array containing a list of constructors.""" 77 78 out.write('// DO NOT MODIFY. GENERATED BY generate_constructor_list.py\n') 79 out.write('\n') 80 81 out.write('#include "ui/ozone/platform_object_internal.h"\n') 82 out.write('\n') 83 84 for include in includes: 85 out.write('#include %(include)s\n' % {'include': include}) 86 out.write('\n') 87 88 out.write('namespace %(namespace)s {\n' % {'namespace': namespace}) 89 out.write('\n') 90 91 # Declarations of constructor functions. 92 for typename in typenames: 93 for platform in platforms: 94 constructor = GetConstructorName(typename, platform) 95 out.write('%(typename)s* %(constructor)s();\n' 96 % {'typename': typename, 97 'constructor': constructor}) 98 out.write('\n') 99 100 out.write('} // namespace %(namespace)s\n' % {'namespace': namespace}) 101 out.write('\n') 102 103 out.write('namespace ui {\n') 104 out.write('\n') 105 106 # Handy typedefs for constructor types. 107 for typename in typenames: 108 out.write('typedef %(typename)s* (*%(typedef)s)();\n' 109 % {'typename': namespace + '::' + typename, 110 'typedef': GetTypedefName(typename)}) 111 out.write('\n') 112 113 # The actual constructor lists. 114 for typename in typenames: 115 out.write('template <> const %(typedef)s\n' 116 % {'typedef': GetTypedefName(typename)}) 117 out.write('PlatformConstructorList<%(typename)s>::kConstructors[] = {\n' 118 % {'typename': namespace + '::' + typename}) 119 for platform in platforms: 120 constructor = GetConstructorName(typename, platform) 121 out.write(' &%(namespace)s::%(constructor)s,\n' 122 % {'namespace': namespace, 'constructor': constructor}) 123 out.write('};\n') 124 out.write('\n') 125 126 # Exported template instantiation. 127 for typename in typenames: 128 out.write('template class %(export)s PlatformObject<%(typename)s>;\n' 129 % {'export': export, 'typename': namespace + '::' + typename}) 130 out.write('\n') 131 132 out.write('} // namespace ui\n') 133 out.write('\n') 134 135 136 def main(argv): 137 parser = optparse.OptionParser() 138 parser.add_option('--namespace', default='ozone') 139 parser.add_option('--export', default='OZONE_EXPORT') 140 parser.add_option('--platform_list') 141 parser.add_option('--output_cc') 142 parser.add_option('--include', action='append', default=[]) 143 parser.add_option('--platform', action='append', default=[]) 144 parser.add_option('--typename', action='append', default=[]) 145 options, _ = parser.parse_args(argv) 146 147 platforms = list(options.platform) 148 typenames = list(options.typename) 149 includes = list(options.include) 150 151 if options.platform_list: 152 platforms = open(options.platform_list, 'r').read().strip().split('\n') 153 154 # Write to standard output or file specified by --output_cc. 155 out_cc = sys.stdout 156 if options.output_cc: 157 out_cc = open(options.output_cc, 'wb') 158 159 GenerateConstructorList(out_cc, options.namespace, options.export, 160 typenames, platforms, includes) 161 162 if options.output_cc: 163 out_cc.close() 164 165 return 0 166 167 168 if __name__ == '__main__': 169 sys.exit(main(sys.argv[1:])) 170
