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      1 /*
      2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #ifndef SVGPathByteStream_h
     21 #define SVGPathByteStream_h
     22 
     23 #include "wtf/Noncopyable.h"
     24 #include "wtf/PassOwnPtr.h"
     25 #include "wtf/Vector.h"
     26 
     27 namespace WebCore {
     28 
     29 // Type definitions for the byte stream data
     30 typedef union {
     31     bool value;
     32     unsigned char bytes[sizeof(bool)];
     33 } BoolByte;
     34 
     35 typedef union {
     36     float value;
     37     unsigned char bytes[sizeof(float)];
     38 } FloatByte;
     39 
     40 typedef union {
     41     unsigned short value;
     42     unsigned char bytes[sizeof(unsigned short)];
     43 } UnsignedShortByte;
     44 
     45 class SVGPathByteStream {
     46     WTF_MAKE_FAST_ALLOCATED;
     47 public:
     48     static PassOwnPtr<SVGPathByteStream> create()
     49     {
     50         return adoptPtr(new SVGPathByteStream);
     51     }
     52 
     53     PassOwnPtr<SVGPathByteStream> copy()
     54     {
     55         return adoptPtr(new SVGPathByteStream(m_data));
     56     }
     57 
     58     typedef Vector<unsigned char> Data;
     59     typedef Data::const_iterator DataIterator;
     60 
     61     DataIterator begin() { return m_data.begin(); }
     62     DataIterator end() { return m_data.end(); }
     63     void append(unsigned char byte) { m_data.append(byte); }
     64     void append(SVGPathByteStream* other)
     65     {
     66         for (DataIterator it = other->begin(); it != other->end(); ++it)
     67             append(*it);
     68     }
     69     void clear() { m_data.clear(); }
     70     bool isEmpty() const { return !m_data.size(); }
     71     unsigned size() const { return m_data.size(); }
     72 
     73     // Only defined to let SVGAnimatedPathAnimator use the standard list code paths - this method is never called.
     74     void resize(unsigned) { }
     75 
     76 private:
     77     SVGPathByteStream() { }
     78     SVGPathByteStream(Data& data)
     79         : m_data(data)
     80     {
     81     }
     82 
     83     Data m_data;
     84 };
     85 
     86 } // namespace WebCore
     87 
     88 #endif // SVGPathByteStream_h
     89