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# Copyright 2013 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os.path
from code_util import Code
import cpp_util
class CCGenerator(object):
def Generate(self, feature_defs, source_file, namespace):
return _Generator(feature_defs, source_file, namespace).Generate()
class _Generator(object):
"""A .cc generator for features.
"""
def __init__(self, feature_defs, source_file, namespace):
self._feature_defs = feature_defs
self._source_file = source_file
self._source_file_filename, _ = os.path.splitext(source_file)
self._class_name = cpp_util.ClassName(self._source_file_filename)
self._namespace = namespace
def Generate(self):
"""Generates a Code object for features.
"""
c = Code()
(c.Append(cpp_util.CHROMIUM_LICENSE) \
.Append() \
.Append(cpp_util.GENERATED_FEATURE_MESSAGE %
cpp_util.ToPosixPath(self._source_file)) \
.Append() \
.Append('#include <string>') \
.Append() \
.Append('#include "%s.h"' %
cpp_util.ToPosixPath(self._source_file_filename)) \
.Append() \
.Append('#include "base/notreached.h"') \
.Append() \
.Concat(cpp_util.OpenNamespace(self._namespace)) \
.Append()
)
# Generate the constructor.
(c.Append('%s::%s() {' % (self._class_name, self._class_name)) \
.Sblock()
)
for feature in self._feature_defs:
c.Append('features_["%s"] = %s;' %
(feature.name, cpp_util.FeatureNameToConstantName(feature.name)))
(c.Eblock() \
.Append('}') \
.Append()
)
# Generate the ToString function.
(c.Append('const char* %s::ToString('
'%s::ID id) const {' % (self._class_name, self._class_name)) \
.Sblock() \
.Append('switch (id) {') \
.Sblock()
)
for feature in self._feature_defs:
c.Append('case %s: return "%s";' %
(cpp_util.FeatureNameToConstantName(feature.name), feature.name))
(c.Append('case kUnknown: break;') \
.Append('case kEnumBoundary: break;') \
.Eblock() \
.Append('}') \
.Append('NOTREACHED();') \
)
(c.Eblock() \
.Append('}') \
.Append()
)
# Generate the FromString function.
(c.Append('%s::ID %s::FromString('
'const std::string& id) const {'
% (self._class_name, self._class_name)) \
.Sblock() \
.Append('const auto& it = features_.find(id);' % self._class_name) \
.Append('return (it == features_.end()) ? kUnknown : it->second;') \
.Eblock() \
.Append('}') \
.Append() \
.Cblock(cpp_util.CloseNamespace(self._namespace))
)
return c
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