xref: /aosp_15_r20/external/google-breakpad/src/common/linux/crc32.h (revision 9712c20fc9bbfbac4935993a2ca0b3958c5adad2)

// Copyright 2014 Google LLC
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google LLC nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef COMMON_LINUX_CRC32_H_
#define COMMON_LINUX_CRC32_H_

#include <stdint.h>

#include <string>

namespace google_breakpad {

// Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the
// checksum result from the previous update; for the first call, it should be 0.
uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len);

// Computes a CRC32 checksum using |len| bytes from |buf|.
inline uint32_t ComputeCrc32(const void* buf, size_t len) {
  return UpdateCrc32(0, buf, len);
}
inline uint32_t ComputeCrc32(const std::string& str) {
  return ComputeCrc32(str.c_str(), str.size());
}

}  // namespace google_breakpad

#endif  // COMMON_LINUX_CRC32_H_