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Issue 1405023016: Convert usage of ARRAY_SIZE to arraysize. (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: static_cast<int> Created 5 years, 1 month ago
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1 /* 1 /*
2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license 4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source 5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found 6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may 7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree. 8 * be found in the AUTHORS file in the root of the source tree.
9 */ 9 */
10 10
11 #include "webrtc/base/crc32.h" 11 #include "webrtc/base/crc32.h"
12 12
13 #include "webrtc/base/arraysize.h"
13 #include "webrtc/base/basicdefs.h" 14 #include "webrtc/base/basicdefs.h"
14 15
15 namespace rtc { 16 namespace rtc {
16 17
17 // This implementation is based on the sample implementation in RFC 1952. 18 // This implementation is based on the sample implementation in RFC 1952.
18 19
19 // CRC32 polynomial, in reversed form. 20 // CRC32 polynomial, in reversed form.
20 // See RFC 1952, or http://en.wikipedia.org/wiki/Cyclic_redundancy_check 21 // See RFC 1952, or http://en.wikipedia.org/wiki/Cyclic_redundancy_check
21 static const uint32_t kCrc32Polynomial = 0xEDB88320; 22 static const uint32_t kCrc32Polynomial = 0xEDB88320;
22 static uint32_t kCrc32Table[256] = {0}; 23 static uint32_t kCrc32Table[256] = {0};
23 24
24 static void EnsureCrc32TableInited() { 25 static void EnsureCrc32TableInited() {
25 if (kCrc32Table[ARRAY_SIZE(kCrc32Table) - 1]) 26 if (kCrc32Table[arraysize(kCrc32Table) - 1])
26 return; // already inited 27 return; // already inited
27 for (uint32_t i = 0; i < ARRAY_SIZE(kCrc32Table); ++i) { 28 for (uint32_t i = 0; i < arraysize(kCrc32Table); ++i) {
28 uint32_t c = i; 29 uint32_t c = i;
29 for (size_t j = 0; j < 8; ++j) { 30 for (size_t j = 0; j < 8; ++j) {
30 if (c & 1) { 31 if (c & 1) {
31 c = kCrc32Polynomial ^ (c >> 1); 32 c = kCrc32Polynomial ^ (c >> 1);
32 } else { 33 } else {
33 c >>= 1; 34 c >>= 1;
34 } 35 }
35 } 36 }
36 kCrc32Table[i] = c; 37 kCrc32Table[i] = c;
37 } 38 }
38 } 39 }
39 40
40 uint32_t UpdateCrc32(uint32_t start, const void* buf, size_t len) { 41 uint32_t UpdateCrc32(uint32_t start, const void* buf, size_t len) {
41 EnsureCrc32TableInited(); 42 EnsureCrc32TableInited();
42 43
43 uint32_t c = start ^ 0xFFFFFFFF; 44 uint32_t c = start ^ 0xFFFFFFFF;
44 const uint8_t* u = static_cast<const uint8_t*>(buf); 45 const uint8_t* u = static_cast<const uint8_t*>(buf);
45 for (size_t i = 0; i < len; ++i) { 46 for (size_t i = 0; i < len; ++i) {
46 c = kCrc32Table[(c ^ u[i]) & 0xFF] ^ (c >> 8); 47 c = kCrc32Table[(c ^ u[i]) & 0xFF] ^ (c >> 8);
47 } 48 }
48 return c ^ 0xFFFFFFFF; 49 return c ^ 0xFFFFFFFF;
49 } 50 }
50 51
51 } // namespace rtc 52 } // namespace rtc
52 53
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