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31 #ifndef WTF_StreamBuffer_h
32 #define WTF_StreamBuffer_h
34 #include <wtf/Deque.h>
35 #include <wtf/FixedArray.h>
36 #include <wtf/OwnPtr.h>
37 #include <wtf/PassOwnPtr.h>
41 template <typename T, size_t BlockSize> class StreamBuffer {
43 typedef Vector<T> Block;
55 bool isEmpty() const { return !size(); }
57 void append(const T* data, size_t size)
64 if (!m_buffer.size() || m_buffer.last()->size() == BlockSize)
65 m_buffer.append(adoptPtr(new Block));
66 size_t appendSize = min(BlockSize - m_buffer.last()->size(), size);
67 m_buffer.last()->append(data, appendSize);
73 // This function consume data in the fist block.
74 // Specified size must be less than over equal to firstBlockSize().
75 void consume(size_t size)
77 ASSERT(m_size >= size);
81 ASSERT(m_buffer.size() > 0);
82 ASSERT(m_readOffset + size <= m_buffer.first()->size());
85 if (m_readOffset >= m_buffer.first()->size()) {
87 m_buffer.removeFirst();
91 size_t size() const { return m_size; }
93 const T* firstBlockData() const
97 ASSERT(m_buffer.size() > 0);
98 return &m_buffer.first()->data()[m_readOffset];
101 size_t firstBlockSize() const
105 ASSERT(m_buffer.size() > 0);
106 return m_buffer.first()->size() - m_readOffset;
112 Deque<OwnPtr<Block> > m_buffer;
117 using WTF::StreamBuffer;
119 #endif // WTF_StreamBuffer_h