1 /* 2 * Copyright (C) 2008 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef StringBuffer_h 30 #define StringBuffer_h 31 32 #include <wtf/Assertions.h> 33 #include <wtf/Noncopyable.h> 34 #include <wtf/unicode/Unicode.h> 35 36 namespace WebCore { 37 38 class StringBuffer : public Noncopyable { 39 public: StringBuffer(unsigned length)40 explicit StringBuffer(unsigned length) 41 : m_length(length) 42 , m_data(static_cast<UChar*>(fastMalloc(length * sizeof(UChar)))) 43 { 44 } ~StringBuffer()45 ~StringBuffer() 46 { 47 fastFree(m_data); 48 } 49 shrink(unsigned newLength)50 void shrink(unsigned newLength) 51 { 52 ASSERT(newLength <= m_length); 53 m_length = newLength; 54 } 55 resize(unsigned newLength)56 void resize(unsigned newLength) 57 { 58 if (newLength > m_length) 59 m_data = static_cast<UChar*>(fastRealloc(m_data, newLength * sizeof(UChar))); 60 m_length = newLength; 61 } 62 length()63 unsigned length() const { return m_length; } characters()64 UChar* characters() { return m_data; } 65 66 UChar& operator[](unsigned i) { ASSERT(i < m_length); return m_data[i]; } 67 release()68 UChar* release() { UChar* data = m_data; m_data = 0; return data; } 69 70 private: 71 unsigned m_length; 72 UChar* m_data; 73 }; 74 75 } 76 77 #endif 78