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C:/temp/src/j2k/etc/Divers/FileNb255.hpp

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// Standard J2K Library
// LGPL licensed.
// http://j2k.sourceforge.net/

#ifndef __J2K__FileNb255_CPP__
#define __J2K__FileNb255_CPP__

#include <j2k/Fred/Standard.hpp>
#include <j2k/Fred/JFile.cpp>
      
/*
  http://j2k.sourceforge.net/src/j2k/Fred/Standard.hpp
  http://j2k.sourceforge.net/src/j2k/Fred/JFile.hpp
  http://j2k.sourceforge.net/src/j2k/Fred/JFile.cpp
*/

#define  MAX  4096

__J2K__EXTERN_C

short  table[ MAX ];
char   buffer[ MAX * 2 ];
size_t length = 0;

void save()
{
  register unsigned short i = 0;
  register unsigned char  c = NULL;
  register unsigned short pos = 0;
  memset( buffer, 0, MAX );
  for( i = 0; i < MAX; i++ )
  {
    if ( table[ i ] < 255 ) {
      c = (UCHAR)table[ i ];
      buffer[ pos ] = c;
      pos++;
    } else if ( table[ i ] < 510 ) {
      c = (UCHAR)(table[ i ] - 255);
      buffer[ pos ] = 255;
      pos++;
      buffer[ pos ] = c;
      pos++;
    } else {
      printf( "Error: Number too big." );
    }
  } 
  length = pos;
}

void load()
{
  register unsigned short i = 0;
  register unsigned char  c = NULL;
  register unsigned short pos = 0;
  memset( buffer, 0, MAX );  
  for( i = 0; i < MAX; i++ )
  {
    c = (UCHAR)buffer[ pos ];
    pos++;
    if ( c < 255 ) {
      table[ i ] = (USHORT)c;
    } else if ( c == 255 ) {
      c = (UCHAR)buffer[ pos ];
      pos++;
      table[ i ] = (USHORT)c;
    } else {
      printf( "Error: Number too big." );
    }
  }
  length = pos;
} 

void toDisk()
{
JFile myFile( "number.txt", "wb" );
 myFile.putData( buffer, length );
}
      
void fromDisk()
{  
JFile myFile( "number.txt", "rb" );
 myFile.putData( buffer, MAX*2 );
} 

void test()
{
  register unsigned short i = 0;   
  for( i = 0; i < MAX; i++ ) {
    table[ i ] = (i+200) % 300;
  }
   
  save();
  toDisk();
    
  fromDisk();
  load();
      
  for( i = 0; i < MAX; i++ ) {
    printf( "[%d]\t", table[ i ] );
  }
      
}

__J2K__END_C
   
#endif

// Hope it helps !
// Fred.
  

 

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