1 # Copyright 2013 The Chromium Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 import os.path 6 7 from code import Code 8 import cpp_util 9 10 11 class CCGenerator(object): 12 def Generate(self, feature_defs, source_file, namespace): 13 return _Generator(feature_defs, source_file, namespace).Generate() 14 15 16 class _Generator(object): 17 """A .cc generator for features. 18 """ 19 def __init__(self, feature_defs, source_file, namespace): 20 self._feature_defs = feature_defs 21 self._source_file = source_file 22 self._source_file_filename, _ = os.path.splitext(source_file) 23 self._class_name = cpp_util.ClassName(self._source_file_filename) 24 self._namespace = namespace 25 26 def Generate(self): 27 """Generates a Code object for features. 28 """ 29 c = Code() 30 (c.Append(cpp_util.CHROMIUM_LICENSE) 31 .Append() 32 .Append(cpp_util.GENERATED_FEATURE_MESSAGE % self._source_file) 33 .Append() 34 .Append('#include <string>') 35 .Append() 36 .Append('#include "%s.h"' % self._source_file_filename) 37 .Append() 38 .Append('#include "base/logging.h"') 39 .Append() 40 .Concat(cpp_util.OpenNamespace(self._namespace)) 41 .Append() 42 ) 43 44 # Generate the constructor. 45 (c.Append('%s::%s() {' % (self._class_name, self._class_name)) 46 .Sblock() 47 ) 48 for feature in self._feature_defs: 49 c.Append('features_["%s"] = %s;' 50 % (feature.name, cpp_util.ConstantName(feature.name))) 51 (c.Eblock() 52 .Append('}') 53 .Append() 54 ) 55 56 # Generate the ToString function. 57 (c.Append('const char* %s::ToString(' 58 '%s::ID id) const {' % (self._class_name, self._class_name)) 59 .Sblock() 60 .Append('switch (id) {') 61 .Sblock() 62 ) 63 for feature in self._feature_defs: 64 c.Append('case %s: return "%s";' % 65 (cpp_util.ConstantName(feature.name), feature.name)) 66 (c.Append('case kUnknown: break;') 67 .Append('case kEnumBoundary: break;') 68 .Eblock() 69 .Append('}') 70 .Append('NOTREACHED();') 71 .Append('return "";') 72 ) 73 (c.Eblock() 74 .Append('}') 75 .Append() 76 ) 77 78 # Generate the FromString function. 79 80 (c.Append('%s::ID %s::FromString(' 81 'const std::string& id) const {' 82 % (self._class_name, self._class_name)) 83 .Sblock() 84 .Append('std::map<std::string, %s::ID>::const_iterator it' 85 ' = features_.find(id);' % self._class_name) 86 .Append('if (it == features_.end())') 87 .Append(' return kUnknown;') 88 .Append('return it->second;') 89 .Eblock() 90 .Append('}') 91 .Append() 92 .Cblock(cpp_util.CloseNamespace(self._namespace)) 93 ) 94 95 return c 96
