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| 2 | #ifndef zfstream_h
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| 3 | #define zfstream_h
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| 4 |
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| 5 | #include <fstream.h>
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| 6 | #include "zlib.h"
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| 7 |
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| 8 | class gzfilebuf : public streambuf {
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| 9 |
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| 10 | public:
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| 11 |
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| 12 | gzfilebuf( );
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| 13 | virtual ~gzfilebuf();
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| 14 |
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| 15 | gzfilebuf *open( const char *name, int io_mode );
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| 16 | gzfilebuf *attach( int file_descriptor, int io_mode );
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| 17 | gzfilebuf *close();
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| 18 |
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| 19 | int setcompressionlevel( int comp_level );
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| 20 | int setcompressionstrategy( int comp_strategy );
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| 21 |
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| 22 | inline int is_open() const { return (file !=NULL); }
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| 23 |
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| 24 | virtual streampos seekoff( streamoff, ios::seek_dir, int );
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| 25 |
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| 26 | virtual int sync();
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| 27 |
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| 28 | protected:
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| 29 |
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| 30 | virtual int underflow();
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| 31 | virtual int overflow( int = EOF );
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| 32 |
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| 33 | private:
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| 34 |
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| 35 | gzFile file;
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| 36 | short mode;
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| 37 | short own_file_descriptor;
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| 38 |
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| 39 | int flushbuf();
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| 40 | int fillbuf();
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| 41 |
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| 42 | };
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| 43 |
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| 44 | class gzfilestream_common : virtual public ios {
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| 45 |
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| 46 | friend class gzifstream;
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| 47 | friend class gzofstream;
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| 48 | friend gzofstream &setcompressionlevel( gzofstream &, int );
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| 49 | friend gzofstream &setcompressionstrategy( gzofstream &, int );
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| 50 |
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| 51 | public:
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| 52 | virtual ~gzfilestream_common();
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| 53 |
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| 54 | void attach( int fd, int io_mode );
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| 55 | void open( const char *name, int io_mode );
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| 56 | void close();
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| 57 |
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| 58 | protected:
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| 59 | gzfilestream_common();
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| 60 |
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| 61 | private:
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| 62 | gzfilebuf *rdbuf();
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| 63 |
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| 64 | gzfilebuf buffer;
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| 65 |
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| 66 | };
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| 67 |
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| 68 | class gzifstream : public gzfilestream_common, public istream {
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| 69 |
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| 70 | public:
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| 71 |
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| 72 | gzifstream();
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| 73 | gzifstream( const char *name, int io_mode = ios::in );
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| 74 | gzifstream( int fd, int io_mode = ios::in );
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| 75 |
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| 76 | virtual ~gzifstream();
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| 77 |
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| 78 | };
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| 79 |
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| 80 | class gzofstream : public gzfilestream_common, public ostream {
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| 81 |
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| 82 | public:
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| 83 |
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| 84 | gzofstream();
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| 85 | gzofstream( const char *name, int io_mode = ios::out );
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| 86 | gzofstream( int fd, int io_mode = ios::out );
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| 87 |
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| 88 | virtual ~gzofstream();
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| 89 |
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| 90 | };
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| 91 |
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| 92 | template<class T> class gzomanip {
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| 93 | friend gzofstream &operator<<(gzofstream &, const gzomanip<T> &);
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| 94 | public:
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| 95 | gzomanip(gzofstream &(*f)(gzofstream &, T), T v) : func(f), val(v) { }
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| 96 | private:
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| 97 | gzofstream &(*func)(gzofstream &, T);
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| 98 | T val;
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| 99 | };
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| 100 |
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| 101 | template<class T> gzofstream &operator<<(gzofstream &s, const gzomanip<T> &m)
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| 102 | {
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| 103 | return (*m.func)(s, m.val);
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| 104 | }
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| 105 |
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| 106 | inline gzofstream &setcompressionlevel( gzofstream &s, int l )
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| 107 | {
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| 108 | (s.rdbuf())->setcompressionlevel(l);
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| 109 | return s;
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| 110 | }
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| 111 |
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| 112 | inline gzofstream &setcompressionstrategy( gzofstream &s, int l )
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| 113 | {
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| 114 | (s.rdbuf())->setcompressionstrategy(l);
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| 115 | return s;
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| 116 | }
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| 117 |
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| 118 | inline gzomanip<int> setcompressionlevel(int l)
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| 119 | {
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| 120 | return gzomanip<int>(&setcompressionlevel,l);
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| 121 | }
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| 122 |
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| 123 | inline gzomanip<int> setcompressionstrategy(int l)
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| 124 | {
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| 125 | return gzomanip<int>(&setcompressionstrategy,l);
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| 126 | }
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| 127 |
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| 128 | #endif
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