47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
// Transparently decompresses gzip files, as well as uncompressed
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// File_Extractor 1.0.0
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#ifndef GZIP_READER_H
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#define GZIP_READER_H
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#include "Data_Reader.h"
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#include "Zlib_Inflater.h"
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class Gzip_Reader : public Data_Reader {
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public:
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// Keeps pointer to reader until close(). If
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blargg_err_t open( File_Reader* );
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// True if file is open
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bool opened() const { return in != NULL; }
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// Frees memory
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void close();
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// True if file is compressed
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bool deflated() const { return inflater.deflated(); }
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// CRC-32 of data, of 0 if unavailable
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unsigned int crc32() const { return crc32_; }
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// Number of bytes read since opening
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BOOST::uint64_t tell() const { return size_ - remain(); }
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public:
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Gzip_Reader();
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virtual ~Gzip_Reader();
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protected:
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virtual blargg_err_t read_v( void*, long );
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private:
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File_Reader* in;
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unsigned crc32_;
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BOOST::uint64_t size_;
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Zlib_Inflater inflater;
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blargg_err_t calc_size();
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};
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#endif
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