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128 lines
2.4 KiB
C++
128 lines
2.4 KiB
C++
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#ifndef zfstream_h
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#define zfstream_h
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#include <fstream.h>
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#include "zlib.h"
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class gzfilebuf : public streambuf {
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public:
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gzfilebuf( );
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virtual ~gzfilebuf();
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gzfilebuf *open( const char *name, int io_mode );
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gzfilebuf *attach( int file_descriptor, int io_mode );
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gzfilebuf *close();
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int setcompressionlevel( int comp_level );
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int setcompressionstrategy( int comp_strategy );
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inline int is_open() const { return (file !=NULL); }
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virtual streampos seekoff( streamoff, ios::seek_dir, int );
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virtual int sync();
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protected:
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virtual int underflow();
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virtual int overflow( int = EOF );
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private:
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gzFile file;
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short mode;
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short own_file_descriptor;
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int flushbuf();
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int fillbuf();
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};
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class gzfilestream_common : virtual public ios {
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friend class gzifstream;
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friend class gzofstream;
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friend gzofstream &setcompressionlevel( gzofstream &, int );
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friend gzofstream &setcompressionstrategy( gzofstream &, int );
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public:
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virtual ~gzfilestream_common();
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void attach( int fd, int io_mode );
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void open( const char *name, int io_mode );
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void close();
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protected:
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gzfilestream_common();
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private:
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gzfilebuf *rdbuf();
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gzfilebuf buffer;
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};
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class gzifstream : public gzfilestream_common, public istream {
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public:
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gzifstream();
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gzifstream( const char *name, int io_mode = ios::in );
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gzifstream( int fd, int io_mode = ios::in );
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virtual ~gzifstream();
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};
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class gzofstream : public gzfilestream_common, public ostream {
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public:
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gzofstream();
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gzofstream( const char *name, int io_mode = ios::out );
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gzofstream( int fd, int io_mode = ios::out );
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virtual ~gzofstream();
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};
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template<class T> class gzomanip {
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friend gzofstream &operator<<(gzofstream &, const gzomanip<T> &);
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public:
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gzomanip(gzofstream &(*f)(gzofstream &, T), T v) : func(f), val(v) { }
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private:
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gzofstream &(*func)(gzofstream &, T);
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T val;
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};
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template<class T> gzofstream &operator<<(gzofstream &s, const gzomanip<T> &m)
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{
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return (*m.func)(s, m.val);
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}
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inline gzofstream &setcompressionlevel( gzofstream &s, int l )
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{
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(s.rdbuf())->setcompressionlevel(l);
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return s;
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}
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inline gzofstream &setcompressionstrategy( gzofstream &s, int l )
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{
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(s.rdbuf())->setcompressionstrategy(l);
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return s;
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}
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inline gzomanip<int> setcompressionlevel(int l)
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{
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return gzomanip<int>(&setcompressionlevel,l);
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}
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inline gzomanip<int> setcompressionstrategy(int l)
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{
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return gzomanip<int>(&setcompressionstrategy,l);
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}
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#endif
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