/* * Copyright (C) 2011 Google 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: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT * OWNER 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. */ #include "config.h" #include "SharedBufferCRLFLineReader.h" #include "SharedBuffer.h" #include <wtf/text/StringBuilder.h> namespace WebCore { SharedBufferCRLFLineReader::SharedBufferCRLFLineReader(SharedBuffer* buffer) : m_buffer(buffer) , m_bufferPosition(0) , m_segment(0) , m_segmentLength(0) , m_segmentIndex(0) , m_reachedEndOfFile(false) { } String SharedBufferCRLFLineReader::nextLine() { if (m_reachedEndOfFile) return String(); bool previousCharacterWasCR = false; StringBuilder stringBuilder; while (true) { bool reachedEndOfLine = false; while (m_segmentIndex < m_segmentLength) { reachedEndOfLine = false; char currentCharacter = m_segment[m_segmentIndex]; if (previousCharacterWasCR) { if (currentCharacter == '\n') reachedEndOfLine = true; else stringBuilder.append('\r'); } else if (currentCharacter != '\r') stringBuilder.append(currentCharacter); previousCharacterWasCR = (currentCharacter == '\r'); m_segmentIndex++; if (reachedEndOfLine) return stringBuilder.toString(); } // Read the next segment. m_segmentIndex = 0; m_bufferPosition += m_segmentLength; m_segmentLength = m_buffer->getSomeData(m_segment, m_bufferPosition); if (!m_segmentLength) { m_reachedEndOfFile = true; if (previousCharacterWasCR) stringBuilder.append('\r'); String line = stringBuilder.toString(); return (line.isEmpty() && !reachedEndOfLine) ? String() : line; } } return String(); } }