hwpfilter/source/hiodev.h

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  30
  31 /**
  32  * hwpio.h
  33  * (C) 1999 Mizi Research, All rights are reserved
  34  *
  35  * $Id: hiodev.h,v 1.5 2008-04-10 12:05:55 rt Exp $
  36  */
  37
  38 #ifndef _HIODEV_H_
  39 #define _HIODEV_H_
  40
  41 #ifdef __GNUG__
  42 #pragma interface
  43 #endif
  44
  45 #include <stdio.h>
  46 #include "hwplib.h"
  47 /**
  48  * @short Abstract IO class
  49  */
  50 class DLLEXPORT HIODev
  51 {
  52     protected:
  53         bool compressed;
  54         virtual void init();
  55     public:
  56         HIODev();
  57         virtual ~HIODev();
  58
  59         virtual bool open() = 0;
  60         virtual void close() = 0;
  61         virtual void flush() = 0;
  62         virtual int  state() const = 0;
  63 /* gzip routine wrapper */
  64         virtual bool setCompressed( bool ) = 0;
  65
  66         virtual int read1b() = 0;
  67         virtual int read2b() = 0;
  68         virtual long read4b() = 0;
  69         virtual int readBlock( void *ptr, int size ) = 0;
  70         virtual int skipBlock( int size ) = 0;
  71
  72         virtual int read1b( void *ptr, int nmemb );
  73         virtual int read2b( void *ptr, int nmemb );
  74         virtual int read4b( void *ptr, int nmemb );
  75 };
  76
  77 struct gz_stream;
  78
  79 /* ÆÄÀÏ ÀÔÃâ·Â ÀåÄ¡ */
  80
  81 /**
  82  * This controls the HStream given by constructor
  83  * @short Stream IO device
  84  */
  85 class HStreamIODev : public HIODev
  86 {
  87     private:
  88 /* zlibÀ¸·Î ¾ÐÃàÀ» Ç®±â À§ÇÑ ÀÚ·á ±¸Á¶ */
  89         gz_stream *_gzfp;
  90         HStream& _stream;
  91     public:
  92         HStreamIODev(HStream& stream);
  93         virtual ~HStreamIODev();
  94 /**
  95  * Check whether the stream is available
  96  */
  97         virtual bool open();
  98 /**
  99  * Free stream object
 100  */
 101         virtual void close();
 102 /**
 103  * If the stream is gzipped, flush the stream.
 104  */
 105         virtual void flush();
 106 /**
 107  * Not implemented.
 108  */
 109         virtual int  state() const;
 110 /**
 111  * Set whether the stream is compressed or not
 112  */
 113         virtual bool setCompressed( bool );
 114 /**
 115  * Read one byte from stream
 116  */
 117         using HIODev::read1b;
 118         virtual int read1b();
 119 /**
 120  * Read 2 bytes from stream
 121  */
 122         using HIODev::read2b;
 123         virtual int read2b();
 124 /**
 125  * Read 4 bytes from stream
 126  */
 127         using HIODev::read4b;
 128         virtual long read4b();
 129 /**
 130  * Read some bytes from stream to given pointer as amount of size
 131  */
 132         virtual int readBlock( void *ptr, int size );
 133 /**
 134  * Move current pointer of stream as amount of size
 135  */
 136         virtual int skipBlock( int size );
 137     protected:
 138 /**
 139  * Initialize this object
 140  */
 141         virtual void init();
 142 };
 143
 144 /* ¸Þ¸ð¸® ÀÔÃâ·Â ÀåÄ¡ */
 145 /**
 146  * The HMemIODev class controls the Input/Output device.
 147  * @short Memory IO device
 148  */
 149 class HMemIODev : public HIODev
 150 {
 151     uchar *ptr;
 152     int pos, length;
 153     public:
 154         HMemIODev(char *s, int len);
 155         virtual ~HMemIODev();
 156
 157         virtual bool open();
 158         virtual void close();
 159         virtual void flush();
 160         virtual int  state() const;
 161 /* gzip routine wrapper */
 162         virtual bool setCompressed( bool );
 163         using HIODev::read1b;
 164         virtual int read1b();
 165         using HIODev::read2b;
 166         virtual int read2b();
 167         using HIODev::read4b;
 168         virtual long read4b();
 169         virtual int readBlock( void *ptr, int size );
 170         virtual int skipBlock( int size );
 171     protected:
 172         virtual void init();
 173 };
 174 #endif                                            /* _HIODEV_H_*/