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| 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 os.path |  | 
| 31 import sys |  | 
| 32 |  | 
| 33 from in_file import InFile |  | 
| 34 import in_generator |  | 
| 35 from name_utilities import lower_first |  | 
| 36 import template_expander |  | 
| 37 |  | 
| 38 |  | 
| 39 class RuntimeFeatureWriter(in_generator.Writer): |  | 
| 40     class_name = 'RuntimeEnabledFeatures' |  | 
| 41 |  | 
| 42     # FIXME: valid_values and defaults should probably roll into one object. |  | 
| 43     valid_values = { |  | 
| 44         'status': ['stable', 'experimental', 'test'], |  | 
| 45     } |  | 
| 46     defaults = { |  | 
| 47         'condition' : None, |  | 
| 48         'depends_on' : [], |  | 
| 49         'custom': False, |  | 
| 50         'status': None, |  | 
| 51     } |  | 
| 52 |  | 
| 53     def __init__(self, in_file_path, enabled_conditions): |  | 
| 54         super(RuntimeFeatureWriter, self).__init__(in_file_path, enabled_conditi
    ons) |  | 
| 55         self._outputs = {(self.class_name + ".h"): self.generate_header, |  | 
| 56                          (self.class_name + ".cpp"): self.generate_implementatio
    n, |  | 
| 57                         } |  | 
| 58 |  | 
| 59         self._features = self.in_file.name_dictionaries |  | 
| 60         # Make sure the resulting dictionaries have all the keys we expect. |  | 
| 61         for feature in self._features: |  | 
| 62             feature['first_lowered_name'] = lower_first(feature['name']) |  | 
| 63             # Most features just check their isFooEnabled bool |  | 
| 64             # but some depend on more than one bool. |  | 
| 65             enabled_condition = "is%sEnabled" % feature['name'] |  | 
| 66             for dependant_name in feature['depends_on']: |  | 
| 67                 enabled_condition += " && is%sEnabled" % dependant_name |  | 
| 68             feature['enabled_condition'] = enabled_condition |  | 
| 69         self._non_custom_features = filter(lambda feature: not feature['custom']
    , self._features) |  | 
| 70 |  | 
| 71     def _feature_sets(self): |  | 
| 72         # Another way to think of the status levels is as "sets of features" |  | 
| 73         # which is how we're referring to them in this generator. |  | 
| 74         return self.valid_values['status'] |  | 
| 75 |  | 
| 76     @template_expander.use_jinja(class_name + ".h.tmpl") |  | 
| 77     def generate_header(self): |  | 
| 78         return { |  | 
| 79             'features': self._features, |  | 
| 80             'feature_sets': self._feature_sets(), |  | 
| 81         } |  | 
| 82 |  | 
| 83     @template_expander.use_jinja(class_name + ".cpp.tmpl") |  | 
| 84     def generate_implementation(self): |  | 
| 85         return { |  | 
| 86             'features': self._features, |  | 
| 87             'feature_sets': self._feature_sets(), |  | 
| 88         } |  | 
| 89 |  | 
| 90 |  | 
| 91 if __name__ == "__main__": |  | 
| 92     in_generator.Maker(RuntimeFeatureWriter).main(sys.argv) |  | 
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