1 // Copyright 2019 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_METRICS_CRC32_H_ 6 #define BASE_METRICS_CRC32_H_ 7 8 #include <stddef.h> 9 #include <stdint.h> 10 11 #include "base/base_export.h" 12 13 namespace base { 14 15 BASE_EXPORT extern const uint32_t kCrcTable[256]; 16 17 // This provides a simple, fast CRC-32 calculation that can be used for checking 18 // the integrity of data. It is not a "secure" calculation! |sum| can start 19 // with any seed or be used to continue an operation began with previous data. 20 BASE_EXPORT uint32_t Crc32(uint32_t sum, const void* data, size_t size); 21 22 } // namespace base 23 24 #endif // BASE_METRICS_CRC32_H_ 25