1 #!/usr/bin/env python 2 # Copyright (C) 2013 Google Inc. All rights reserved. 3 # 4 # Redistribution and use in source and binary forms, with or without 5 # modification, are permitted provided that the following conditions are 6 # met: 7 # 8 # * Redistributions of source code must retain the above copyright 9 # notice, this list of conditions and the following disclaimer. 10 # * Redistributions in binary form must reproduce the above 11 # copyright notice, this list of conditions and the following disclaimer 12 # in the documentation and/or other materials provided with the 13 # distribution. 14 # * Neither the name of Google Inc. nor the names of its 15 # contributors may be used to endorse or promote products derived from 16 # this software without specific prior written permission. 17 # 18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 import sys 31 32 import in_generator 33 import name_utilities 34 from name_utilities import lower_first 35 import template_expander 36 37 38 class RuntimeFeatureWriter(in_generator.Writer): 39 class_name = 'RuntimeEnabledFeatures' 40 filters = { 41 'enable_conditional': name_utilities.enable_conditional_if_endif, 42 } 43 44 # FIXME: valid_values and defaults should probably roll into one object. 45 valid_values = { 46 'status': ['stable', 'experimental', 'test', 'deprecated'], 47 } 48 defaults = { 49 'condition' : None, 50 'depends_on' : [], 51 'custom': False, 52 'status': None, 53 } 54 55 _status_aliases = { 56 'deprecated': 'test', 57 } 58 59 def __init__(self, in_file_path): 60 super(RuntimeFeatureWriter, self).__init__(in_file_path) 61 self._outputs = {(self.class_name + '.h'): self.generate_header, 62 (self.class_name + '.cpp'): self.generate_implementation, 63 } 64 65 self._features = self.in_file.name_dictionaries 66 # Make sure the resulting dictionaries have all the keys we expect. 67 for feature in self._features: 68 feature['first_lowered_name'] = lower_first(feature['name']) 69 feature['status'] = self._status_aliases.get(feature['status'], feature['status']) 70 # Most features just check their isFooEnabled bool 71 # but some depend on more than one bool. 72 enabled_condition = 'is%sEnabled' % feature['name'] 73 for dependant_name in feature['depends_on']: 74 enabled_condition += ' && is%sEnabled' % dependant_name 75 feature['enabled_condition'] = enabled_condition 76 self._non_custom_features = filter(lambda feature: not feature['custom'], self._features) 77 78 def _feature_sets(self): 79 # Another way to think of the status levels is as "sets of features" 80 # which is how we're referring to them in this generator. 81 return [status for status in self.valid_values['status'] if status not in self._status_aliases] 82 83 @template_expander.use_jinja(class_name + '.h.tmpl', filters=filters) 84 def generate_header(self): 85 return { 86 'features': self._features, 87 'feature_sets': self._feature_sets(), 88 } 89 90 @template_expander.use_jinja(class_name + '.cpp.tmpl', filters=filters) 91 def generate_implementation(self): 92 return { 93 'features': self._features, 94 'feature_sets': self._feature_sets(), 95 } 96 97 98 if __name__ == '__main__': 99 in_generator.Maker(RuntimeFeatureWriter).main(sys.argv) 100
