1 /* 2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACE_PROCESSOR_IMPORTERS_PERF_UTIL_H_ 18 #define SRC_TRACE_PROCESSOR_IMPORTERS_PERF_UTIL_H_ 19 20 #include <cstddef> 21 #include <type_traits> 22 23 namespace perfetto::trace_processor::perf_importer { 24 25 template <typename A, 26 typename Res, 27 typename = std::enable_if_t<std::is_integral<A>::value && 28 std::is_integral<Res>::value>> SafeCast(A a,Res * res)29bool SafeCast(A a, Res* res) { 30 *res = static_cast<Res>(a); 31 32 // Was the value clamped? 33 if (static_cast<A>(*res) != a) { 34 return false; 35 } 36 37 // Did the sign change? 38 if ((a < 0) != (*res < 0)) { 39 return false; 40 } 41 42 return true; 43 } 44 45 } // namespace perfetto::trace_processor::perf_importer 46 47 #endif // SRC_TRACE_PROCESSOR_IMPORTERS_PERF_UTIL_H_ 48