54 lines
2.2 KiB
C++
54 lines
2.2 KiB
C++
// Copyright 2014 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef COMMON_LINUX_CRC32_H_
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#define COMMON_LINUX_CRC32_H_
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#include <stdint.h>
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#include <string>
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namespace google_breakpad {
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// Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the
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// checksum result from the previous update; for the first call, it should be 0.
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uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len);
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// Computes a CRC32 checksum using |len| bytes from |buf|.
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inline uint32_t ComputeCrc32(const void* buf, size_t len) {
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return UpdateCrc32(0, buf, len);
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}
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inline uint32_t ComputeCrc32(const std::string& str) {
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return ComputeCrc32(str.c_str(), str.size());
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}
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} // namespace google_breakpad
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#endif // COMMON_LINUX_CRC32_H_
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