77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (C) 2013, Opera Software ASA. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "SegmentedString.h"
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#include <wtf/text/StringBuilder.h>
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namespace WebCore {
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// Line collection helper for the WebVTT Parser.
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//
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// Converts a stream of data (== a sequence of Strings) into a set of
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// lines. CR, LR or CRLF are considered line breaks. Normalizes NULs (U+0000)
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// to 'REPLACEMENT CHARACTER' (U+FFFD) and does not return the line breaks as
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// part of the result.
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class BufferedLineReader {
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WTF_MAKE_NONCOPYABLE(BufferedLineReader);
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public:
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BufferedLineReader() = default;
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void reset();
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void append(String&& data)
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{
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ASSERT(!m_endOfStream);
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m_buffer.append(WTFMove(data));
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}
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void appendEndOfStream() { m_endOfStream = true; }
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bool isAtEndOfStream() const { return m_endOfStream && m_buffer.isEmpty(); }
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std::optional<String> nextLine();
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private:
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SegmentedString m_buffer;
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StringBuilder m_lineBuffer;
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bool m_endOfStream { false };
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bool m_maybeSkipLF { false };
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};
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inline void BufferedLineReader::reset()
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{
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m_buffer.clear();
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m_lineBuffer.clear();
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m_endOfStream = false;
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m_maybeSkipLF = false;
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}
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} // namespace WebCore
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