1 /* 2 * Copyright (C) 2023 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 INCLUDE_PERFETTO_PUBLIC_FNV1A_H_ 18 #define INCLUDE_PERFETTO_PUBLIC_FNV1A_H_ 19 20 #include <stdint.h> 21 #include <stdlib.h> 22 23 #include "perfetto/public/compiler.h" 24 PerfettoFnv1a(const void * data,size_t size)25static inline uint64_t PerfettoFnv1a(const void* data, size_t size) { 26 const uint64_t kFnv1a64OffsetBasis = 0xcbf29ce484222325; 27 const uint64_t kFnv1a64Prime = 0x100000001b3; 28 29 uint64_t value = kFnv1a64OffsetBasis; 30 31 for (size_t i = 0; i < size; i++) { 32 value = 33 (value ^ PERFETTO_STATIC_CAST(const uint8_t*, data)[i]) * kFnv1a64Prime; 34 } 35 return value; 36 } 37 38 #endif // INCLUDE_PERFETTO_PUBLIC_FNV1A_H_ 39