| 1 | |
| 2 | #ifndef zfstream_h |
| 3 | #define zfstream_h |
| 4 | |
| 5 | #include <fstream.h> |
| 6 | #include "zlib.h" |
| 7 | |
| 8 | class gzfilebuf : public streambuf { |
| 9 | |
| 10 | public: |
| 11 | |
| 12 | gzfilebuf( ); |
| 13 | virtual ~gzfilebuf(); |
| 14 | |
| 15 | gzfilebuf *open( const char *name, int io_mode ); |
| 16 | gzfilebuf *attach( int file_descriptor, int io_mode ); |
| 17 | gzfilebuf *close(); |
| 18 | |
| 19 | int setcompressionlevel( int comp_level ); |
| 20 | int setcompressionstrategy( int comp_strategy ); |
| 21 | |
| 22 | inline int is_open() const { return (file !=NULL); } |
| 23 | |
| 24 | virtual streampos seekoff( streamoff, ios::seek_dir, int ); |
| 25 | |
| 26 | virtual int sync(); |
| 27 | |
| 28 | protected: |
| 29 | |
| 30 | virtual int underflow(); |
| 31 | virtual int overflow( int = EOF ); |
| 32 | |
| 33 | private: |
| 34 | |
| 35 | gzFile file; |
| 36 | short mode; |
| 37 | short own_file_descriptor; |
| 38 | |
| 39 | int flushbuf(); |
| 40 | int fillbuf(); |
| 41 | |
| 42 | }; |
| 43 | |
| 44 | class gzfilestream_common : virtual public ios { |
| 45 | |
| 46 | friend class gzifstream; |
| 47 | friend class gzofstream; |
| 48 | friend gzofstream &setcompressionlevel( gzofstream &, int ); |
| 49 | friend gzofstream &setcompressionstrategy( gzofstream &, int ); |
| 50 | |
| 51 | public: |
| 52 | virtual ~gzfilestream_common(); |
| 53 | |
| 54 | void attach( int fd, int io_mode ); |
| 55 | void open( const char *name, int io_mode ); |
| 56 | void close(); |
| 57 | |
| 58 | protected: |
| 59 | gzfilestream_common(); |
| 60 | |
| 61 | private: |
| 62 | gzfilebuf *rdbuf(); |
| 63 | |
| 64 | gzfilebuf buffer; |
| 65 | |
| 66 | }; |
| 67 | |
| 68 | class gzifstream : public gzfilestream_common, public istream { |
| 69 | |
| 70 | public: |
| 71 | |
| 72 | gzifstream(); |
| 73 | gzifstream( const char *name, int io_mode = ios::in ); |
| 74 | gzifstream( int fd, int io_mode = ios::in ); |
| 75 | |
| 76 | virtual ~gzifstream(); |
| 77 | |
| 78 | }; |
| 79 | |
| 80 | class gzofstream : public gzfilestream_common, public ostream { |
| 81 | |
| 82 | public: |
| 83 | |
| 84 | gzofstream(); |
| 85 | gzofstream( const char *name, int io_mode = ios::out ); |
| 86 | gzofstream( int fd, int io_mode = ios::out ); |
| 87 | |
| 88 | virtual ~gzofstream(); |
| 89 | |
| 90 | }; |
| 91 | |
| 92 | template<class T> class gzomanip { |
| 93 | friend gzofstream &operator<<(gzofstream &, const gzomanip<T> &); |
| 94 | public: |
| 95 | gzomanip(gzofstream &(*f)(gzofstream &, T), T v) : func(f), val(v) { } |
| 96 | private: |
| 97 | gzofstream &(*func)(gzofstream &, T); |
| 98 | T val; |
| 99 | }; |
| 100 | |
| 101 | template<class T> gzofstream &operator<<(gzofstream &s, const gzomanip<T> &m) |
| 102 | { |
| 103 | return (*m.func)(s, m.val); |
| 104 | } |
| 105 | |
| 106 | inline gzofstream &setcompressionlevel( gzofstream &s, int l ) |
| 107 | { |
| 108 | (s.rdbuf())->setcompressionlevel(l); |
| 109 | return s; |
| 110 | } |
| 111 | |
| 112 | inline gzofstream &setcompressionstrategy( gzofstream &s, int l ) |
| 113 | { |
| 114 | (s.rdbuf())->setcompressionstrategy(l); |
| 115 | return s; |
| 116 | } |
| 117 | |
| 118 | inline gzomanip<int> setcompressionlevel(int l) |
| 119 | { |
| 120 | return gzomanip<int>(&setcompressionlevel,l); |
| 121 | } |
| 122 | |
| 123 | inline gzomanip<int> setcompressionstrategy(int l) |
| 124 | { |
| 125 | return gzomanip<int>(&setcompressionstrategy,l); |
| 126 | } |
| 127 | |
| 128 | #endif |