source: xtideuniversalbios/tags/Serial_Server_for_v2.0.0_beta1/library/FlatImage.h@ 565

//======================================================================
//
// Project:     XTIDE Universal BIOS, Serial Port Server
//
// File:        FlatImage.h - Header file for basic flat disk image support
//

#include "library.h"

class FlatImage : public Image
{
private:
    class FileAccess fp;

public:
    FlatImage( char *name, int p_readOnly, int p_drive, int p_create, unsigned long p_cyl, unsigned long p_head, unsigned long p_sect, int p_useCHS )   :   Image( name, p_readOnly, p_drive, p_create, p_cyl, p_head, p_sect, p_useCHS )
    {
        long filesize;

        if( p_create )
        {
            char buff[512];
            unsigned long size;
            double sizef;
            FileAccess cf;
            char sizeChar;

            size = (unsigned long) p_cyl * (unsigned long) p_sect * (unsigned long) p_head;
            if( size > cf.MaxSectors )
                log( -1, "'%s', can't create flat file with size greater than %lu 512-byte sectors", name, cf.MaxSectors );
            sizef = size / 2048.0;   // 512 byte sectors -> MB
            sizeChar = 'M';
            if( sizef < 1 ) 
            {
                sizef *= 1024;
                sizeChar = 'K';
            }

            if( cf.Create( name ) )
            {
                memset( &buff[0], 0, 512 );
                while( size-- )
                    cf.Write( &buff[0], 512 );
                
                if( p_cyl > 1024 )
                    log( 0, "Created file '%s', size %.2lf %cB", name, sizef, sizeChar );
                else
                    log( 0, "Created file '%s', geometry %u:%u:%u, size %.2lf %cB", name, p_cyl, p_head, p_sect, sizef, sizeChar );
                cf.Close();
            }
        }

        fp.Open( name );

        totallba = fp.SizeSectors();

        init( name, p_readOnly, p_drive, p_cyl, p_head, p_sect, p_useCHS );
    }

    FlatImage::~FlatImage()
    {
        fp.Close();
    }

    void seekSector( unsigned long lba )
    {
        fp.SeekSectors( lba );
    }

    void writeSector( void *buff )
    {
        fp.Write( buff, 512 );
    }

    void readSector( void *buff )
    {
        fp.Read( buff, 512 );
    }
};