diff options
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/linux/crc32.cc')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/linux/crc32.cc | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/crc32.cc b/toolkit/crashreporter/google-breakpad/src/common/linux/crc32.cc deleted file mode 100644 index 8df636ce4..000000000 --- a/toolkit/crashreporter/google-breakpad/src/common/linux/crc32.cc +++ /dev/null @@ -1,70 +0,0 @@ -// 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. -// * Neither the name of Google Inc. 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. - -#include "common/linux/crc32.h" - -namespace google_breakpad { - -// This implementation is based on the sample implementation in RFC 1952. - -// CRC32 polynomial, in reversed form. -// See RFC 1952, or http://en.wikipedia.org/wiki/Cyclic_redundancy_check -static const uint32_t kCrc32Polynomial = 0xEDB88320; -static uint32_t kCrc32Table[256] = { 0 }; - -#define arraysize(f) (sizeof(f) / sizeof(*f)) - -static void EnsureCrc32TableInited() { - if (kCrc32Table[arraysize(kCrc32Table) - 1]) - return; // already inited - for (uint32_t i = 0; i < arraysize(kCrc32Table); ++i) { - uint32_t c = i; - for (size_t j = 0; j < 8; ++j) { - if (c & 1) { - c = kCrc32Polynomial ^ (c >> 1); - } else { - c >>= 1; - } - } - kCrc32Table[i] = c; - } -} - -uint32_t UpdateCrc32(uint32_t start, const void* buf, size_t len) { - EnsureCrc32TableInited(); - - uint32_t c = start ^ 0xFFFFFFFF; - const uint8_t* u = static_cast<const uint8_t*>(buf); - for (size_t i = 0; i < len; ++i) { - c = kCrc32Table[(c ^ u[i]) & 0xFF] ^ (c >> 8); - } - return c ^ 0xFFFFFFFF; -} - -} // namespace google_breakpad |