| /* |
| * Copyright (C) 2012 Apple 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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. |
| */ |
| |
| #ifndef BitArray_h |
| #define BitArray_h |
| |
| #include <string.h> |
| #include <wtf/Assertions.h> |
| |
| namespace WTF { |
| |
| template<unsigned arraySize> |
| class BitArray { |
| public: |
| BitArray() |
| { |
| memset(m_data, 0, sizeof(m_data)); |
| } |
| |
| void set(unsigned index) |
| { |
| ASSERT(index < arraySize); |
| m_data[index / 8] |= 1 << (index & 7); |
| } |
| |
| bool get(unsigned index) const |
| { |
| ASSERT(index < arraySize); |
| return !!(m_data[index / 8] & (1 << (index & 7))); |
| } |
| |
| private: |
| unsigned char m_data[arraySize / 8 + 1]; |
| }; |
| |
| } // namespace WTF |
| |
| using WTF::BitArray; |
| |
| #endif // BitArray_h |