Source/WebCore/svg/SVGPathByteStream.h

/*
 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef SVGPathByteStream_h
#define SVGPathByteStream_h

#include <wtf/Noncopyable.h>
#include <wtf/Vector.h>

namespace WebCore {

// Type definitions for the byte stream data
typedef union {
    bool value;
    unsigned char bytes[sizeof(bool)];
} BoolByte;

typedef union {
    float value;
    unsigned char bytes[sizeof(float)];
} FloatByte;

typedef union {
    unsigned short value;
    unsigned char bytes[sizeof(unsigned short)];
} UnsignedShortByte;

class SVGPathByteStream {
    WTF_MAKE_FAST_ALLOCATED;
public:
    typedef Vector<unsigned char> Data;
    typedef Data::const_iterator DataIterator;

    SVGPathByteStream() { }
    SVGPathByteStream(const Data& data) : m_data(data) { }
    
    bool operator==(const SVGPathByteStream& other) const
    {
        return m_data == other.m_data;
    }

    bool operator!=(const SVGPathByteStream& other) const
    {
        return !(*this == other);
    }

    std::unique_ptr<SVGPathByteStream> copy() const
    {
        return std::make_unique<SVGPathByteStream>(m_data);
    }

    DataIterator begin() const { return m_data.begin(); }
    DataIterator end() const { return m_data.end(); }

    void append(unsigned char byte) { m_data.append(byte); }
    void append(const SVGPathByteStream& other)
    {
        for (auto stream : other)
            append(stream);
    }
    void clear() { m_data.clear(); }
    bool isEmpty() const { return !m_data.size(); }
    unsigned size() const { return m_data.size(); }

    // Only defined to let SVGAnimatedPathAnimator use the standard list code paths - this method is never called.
    void resize(unsigned) { }

private:
    Data m_data;
};

} // namespace WebCore

#endif // SVGPathByteStream_h