52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#if !defined(__ZSTREAM_H)
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#define __ZSTREAM_H
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#include <mitsuba/mitsuba.h>
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#include <zlib.h>
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#define ZSTREAM_BUFSIZE 16384
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MTS_NAMESPACE_BEGIN
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/** \brief Transparent compression/decompression stream based on ZLIB.
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*/
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class MTS_EXPORT_CORE ZStream : public Stream {
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public:
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/// Create a new compression stream
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ZStream(Stream *childStream, int level = Z_DEFAULT_COMPRESSION);
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/// Return the child stream of this compression stream
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inline const Stream *getChildStream() const { return m_childStream.get(); }
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/// Return the child stream of this compression stream
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inline Stream *getChildStream() { return m_childStream; }
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/* Stream implementation */
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void read(void *ptr, size_t size);
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void write(const void *ptr, size_t size);
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void setPos(size_t pos);
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size_t getPos() const;
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size_t getSize() const;
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void truncate(size_t size);
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void flush();
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bool canWrite() const;
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bool canRead() const;
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/// Return a string representation
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std::string toString() const;
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MTS_DECLARE_CLASS()
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protected:
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// \brief Virtual destructor
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virtual ~ZStream();
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private:
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ref<Stream> m_childStream;
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z_stream m_deflateStream, m_inflateStream;
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uint8_t m_deflateBuffer[ZSTREAM_BUFSIZE];
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uint8_t m_inflateBuffer[ZSTREAM_BUFSIZE];
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bool m_didWrite;
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};
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MTS_NAMESPACE_END
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#endif /* __ZSTREAM_H */
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