| /* |
| * Copyright (C) 2008, 2010 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. |
| * 3. Neither the name of Apple Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 StringBuffer_h |
| #define StringBuffer_h |
| |
| #include <wtf/Assertions.h> |
| #include <wtf/unicode/Unicode.h> |
| #include <limits> |
| |
| namespace WTF { |
| |
| template <typename CharType> |
| class StringBuffer { |
| WTF_MAKE_NONCOPYABLE(StringBuffer); |
| public: |
| explicit StringBuffer(unsigned length) |
| : m_length(length) |
| { |
| if (m_length > std::numeric_limits<unsigned>::max() / sizeof(CharType)) |
| CRASH(); |
| m_data = static_cast<CharType*>(fastMalloc(m_length * sizeof(CharType))); |
| } |
| |
| ~StringBuffer() |
| { |
| fastFree(m_data); |
| } |
| |
| void shrink(unsigned newLength) |
| { |
| ASSERT(newLength <= m_length); |
| m_length = newLength; |
| } |
| |
| void resize(unsigned newLength) |
| { |
| if (newLength > m_length) { |
| if (newLength > std::numeric_limits<unsigned>::max() / sizeof(UChar)) |
| CRASH(); |
| m_data = static_cast<UChar*>(fastRealloc(m_data, newLength * sizeof(UChar))); |
| } |
| m_length = newLength; |
| } |
| |
| unsigned length() const { return m_length; } |
| CharType* characters() { return m_data; } |
| |
| CharType& operator[](unsigned i) { ASSERT(i < m_length); return m_data[i]; } |
| |
| CharType* release() { CharType* data = m_data; m_data = 0; return data; } |
| |
| private: |
| unsigned m_length; |
| CharType* m_data; |
| }; |
| |
| } // namespace WTF |
| |
| using WTF::StringBuffer; |
| |
| #endif // StringBuffer_h |