xref: /external/google-breakpad/src/common/linux/crc32.h

// Copyright 2014 Google Inc.
// All rights reserved.
//
// 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.
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// 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
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#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_