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Unified Diff: webrtc/base/crc32.cc

Issue 2877023002: Move webrtc/{base => rtc_base} (Closed)
Patch Set: update presubmit.py and DEPS include rules Created 3 years, 6 months ago
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Index: webrtc/base/crc32.cc
diff --git a/webrtc/base/crc32.cc b/webrtc/base/crc32.cc
deleted file mode 100644
index 97b82145d7a9a07effa6e5881001d605b39bcd57..0000000000000000000000000000000000000000
--- a/webrtc/base/crc32.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2012 The WebRTC Project Authors. All rights reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE file in the root of the source
- * tree. An additional intellectual property rights grant can be found
- * in the file PATENTS. All contributing project authors may
- * be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/crc32.h"
-
-#include "webrtc/base/arraysize.h"
-
-namespace rtc {
-
-// 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};
-
-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 rtc
-
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