15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2008, 2010 Apple Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 902772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * notice, this list of conditions and the following disclaimer. 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 1202772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * documentation and/or other materials provided with the distribution. 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 3. Neither the name of Apple Inc. ("Apple") nor the names of its 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * contributors may be used to endorse or promote products derived 1502772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * from this software without specific prior written permission. 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef StringBuffer_h 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define StringBuffer_h 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 32591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/Assertions.h" 3383750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch#include "wtf/text/StringImpl.h" 34591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/unicode/Unicode.h" 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WTF { 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)template <typename CharType> 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class StringBuffer { 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) WTF_MAKE_NONCOPYABLE(StringBuffer); 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 42f5e4ad553afbc08dd2e729bb77e937a9a94d5827Torne (Richard Coles) StringBuffer() { } 43f5e4ad553afbc08dd2e729bb77e937a9a94d5827Torne (Richard Coles) 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) explicit StringBuffer(unsigned length) 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 4683750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch CharType* characters; 4783750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch m_data = StringImpl::createUninitialized(length, characters); 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ~StringBuffer() 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 547242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci void shrink(unsigned newLength); 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 568abfc5808a4e34d6e03867af8bc440dee641886fTorne (Richard Coles) unsigned length() const { return m_data ? m_data->length() : 0; } 5702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch CharType* characters() { return length() ? const_cast<CharType*>(m_data->getCharacters<CharType>()) : 0; } 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 5983750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch CharType& operator[](unsigned i) { ASSERT_WITH_SECURITY_IMPLICATION(i < length()); return characters()[i]; } 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 6183750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch PassRefPtr<StringImpl> release() { return m_data.release(); } 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)private: 6483750176c3ee2cea66c8a9751271026a5901be3aBen Murdoch RefPtr<StringImpl> m_data; 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 677242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tuccitemplate <typename CharType> 687242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tuccivoid StringBuffer<CharType>::shrink(unsigned newLength) 697242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci{ 707242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci ASSERT(m_data); 717242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (m_data->length() == newLength) 727242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci return; 737242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci m_data->truncateAssumingIsolated(newLength); 747242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci} 757242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WTF 775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)using WTF::StringBuffer; 795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif // StringBuffer_h 81