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| 1 /* | |
| 2 * Copyright (C) 2012 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef BitArray_h | |
| 27 #define BitArray_h | |
| 28 | |
| 29 #include <string.h> | |
| 30 #include <wtf/Assertions.h> | |
| 31 | |
| 32 namespace WTF { | |
| 33 | |
| 34 template<unsigned arraySize> | |
| 35 class BitArray { | |
| 36 public: | |
| 37 BitArray() | |
| 38 { | |
| 39 memset(m_data, 0, sizeof(m_data)); | |
| 40 } | |
| 41 | |
| 42 void set(unsigned index) | |
| 43 { | |
| 44 ASSERT_WITH_SECURITY_IMPLICATION(index < arraySize); | |
| 45 m_data[index / 8] |= 1 << (index & 7); | |
| 46 } | |
| 47 | |
| 48 bool get(unsigned index) const | |
| 49 { | |
| 50 ASSERT_WITH_SECURITY_IMPLICATION(index < arraySize); | |
| 51 return !!(m_data[index / 8] & (1 << (index & 7))); | |
| 52 } | |
| 53 | |
| 54 private: | |
| 55 unsigned char m_data[arraySize / 8 + 1]; | |
| 56 }; | |
| 57 | |
| 58 } // namespace WTF | |
| 59 | |
| 60 using WTF::BitArray; | |
| 61 | |
| 62 #endif // BitArray_h | |
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Chromium Code Reviews
Issue 14238015:
Move Source/WTF/wtf to Source/wtf (Closed)
Base URL: svn://svn.chromium.org/blink/trunk