1/* 2** 3** Copyright 2016, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#include "keymaster_tags.h" 19 20namespace android { 21namespace hardware { 22namespace keymaster { 23namespace V3_0 { 24 25template <typename TagList> struct TagStringifier; 26 27template <typename... Tags> struct TagStringifier<MetaList<Tags...>> { 28 template <TagType tag_type, Tag tag> 29 static TypedTag<tag_type, tag> chooseString(TypedTag<tag_type, tag> ttag, Tag runtime_tag, 30 const char** result) { 31 if (tag == runtime_tag) { 32 *result = Tag2String<tag>::value(); 33 } 34 return ttag; 35 } 36 static const char* stringify(Tag tag) { 37 const char* result = "unknown tag"; 38 [](Tags&&...) {}(chooseString(Tags(), tag, &result)...); 39 return result; 40 } 41}; 42 43const char* stringifyTag(Tag tag) { 44 return TagStringifier<all_tags_t>::stringify(tag); 45} 46 47} // namespace V3_0 48} // namespace keymaster 49} // namespace hardware 50} // namespace android 51