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// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
#include "cdsk_scp.h"
#include "autil.h"
#include "cfile.h"
#define SCP_MAGIC 0xFDFD
CScp::CScp() : CDisk()
{
#ifdef _MEMORY_DUMP_
printf( "CScp constructed: %08X\n", this );
#endif
}
CScp::~CScp()
{
#ifdef _MEMORY_DUMP_
printf( "CScp destructed: %08X\n", this );
#endif
}
BOOL CScp::Load( char* szFname, BOOL, BOOL )
{
WORD wMagic;
BYTE btSectorSize;
BYTE btTracks;
BYTE btSectorsPerTrack;
CFile cf;
if( !cf.Open( szFname ) )
{
sprintf( m_szLastError, "SCP: Can't open '%s'", szFname );
return FALSE;
}
strcpy( m_szFname, szFname );
wMagic = cf.readLEw();
if ( wMagic != SCP_MAGIC )
{
sprintf( m_szLastError, "SCP: File '%s' is not an SCP file!", szFname );
return FALSE;
}
btSectorSize = cf.readb();
btTracks = cf.readb();
btSectorsPerTrack = cf.readb();
int iSectorSize;
switch( btSectorSize )
{
case 0x80:
iSectorSize = 0x80;
break;
case 0x00:
iSectorSize = 0x100;
break;
default:
{
sprintf( m_szLastError, "SCP: Invalid sector size: %02X", btSectorSize );
return FALSE;
}
}
DISK_GEOMETRY dg;
dg.iSides = 1;
dg.iTracks = btTracks;
dg.iSectorsPerTrack = btSectorsPerTrack;
dg.iBytesPerSector = iSectorSize;
if ( !Format( &dg ) )
return FALSE;
BYTE *pbtTable = new BYTE [ btSectorsPerTrack * btTracks ];
if ( ! pbtTable )
{
sprintf( m_szLastError, "SCP: Not enough memory for sector table!" );
return FALSE;
}
if ( !cf.Read( pbtTable, btSectorsPerTrack * btTracks ) )
{
sprintf( m_szLastError, "SCP: Can't read sector table!" );
return FALSE;
}
BYTE abtBuff[ 0x100 ];
memset( abtBuff, 0, 0x100 );
BYTE* pbtPtr = pbtTable;
for( int iTrack = 0; iTrack < btTracks; iTrack++ )
{
for( int iSector = 0; iSector < btSectorsPerTrack; iSector++ )
{
if ( *pbtPtr )
{
int iNowRead;
if ( !iTrack && ( iSector < 3 ) )
iNowRead = 0x80;
else
iNowRead = iSectorSize;
int iReallyRead;
if ( !cf.Read( abtBuff, iNowRead, &iReallyRead ) || ( iNowRead != iReallyRead ) )
{
delete [] pbtTable;
sprintf( m_szLastError, "SCP: Image broken!" );
return FALSE;
}
if ( !WriteSector( *pbtPtr + iTrack* btSectorsPerTrack, abtBuff ) )
{
delete [] pbtTable;
return FALSE;
}
}
pbtPtr++;
}
}
delete [] pbtTable;
cf.Close();
return TRUE;
}
#ifdef __CDISK_WRITE__
BOOL CScp::Save( char* szOutFile, BOOL bOverWrite )
{
if ( !bOverWrite && !access( szOutFile, F_OK ) )
{
sprintf( m_szLastError, "SCP: File already exists! '%s'", szOutFile );
return FALSE;
}
BYTE btSize;
BYTE btTracks;
BYTE btSpT;
switch ( m_geometry.iBytesPerSector )
{
case 0x80:
btSize = 0x80;
break;
case 0x100:
default:
btSize = 0x00;
break;
}
BOOL bGood = FALSE;
btTracks = m_geometry.iTracks;
btSpT = m_geometry.iSectorsPerTrack;
if ( ( m_geometry.iTracks == 40 ) && ( m_geometry.iSectorsPerTrack == 18 ) )
bGood = TRUE;
if ( ( m_geometry.iTracks == 40 ) && ( m_geometry.iSectorsPerTrack == 26 ) )
bGood = TRUE;
if ( !bGood )
{
sprintf( m_szLastError, "SCP: Can't export, because of invalid disk size!" );
return FALSE;
}
int iMapSize = m_geometry.iTracks * m_geometry.iSectorsPerTrack;
BYTE* pMap = new BYTE [ iMapSize ];
if ( !pMap )
{
sprintf( m_szLastError, "SCP: Can't allocate memory for map!" );
return FALSE;
}
memset( pMap, 0, iMapSize );
CFile cf;
if ( !cf.Create( szOutFile ) )
{
sprintf( m_szLastError, "SCP: Can't create '%s'", szOutFile );
delete [] pMap;
return FALSE;
}
WORD wMagic = SCP_MAGIC;
cf.writeLEw( wMagic );
cf.writeb( btSize );
cf.writeb( btTracks );
cf.writeb( btSpT );
cf.Seek( iMapSize, SEEK_CUR );
BYTE abtBuff[ 0x100 ];
int iSectors = m_geometry.iSectors;
for( int i = 0; i < iSectors; i++ )
{
if ( !ReadSector( abtBuff, i + 1 ) )
{
delete [] pMap;
cf.Close();
unlink( szOutFile );
return FALSE;
}
int iBytesNow = ( i < 3 ) ? 0x80 : m_geometry.iBytesPerSector;
if ( !IsBlockEmpty( abtBuff, iBytesNow ) )
{
int iWritten;
if ( !cf.Write( abtBuff, iBytesNow, &iWritten ) || ( iBytesNow != iWritten ) )
{
sprintf( m_szLastError, "SCP: Error writing to '%s'", szOutFile );
delete [] pMap;
cf.Close( );
unlink( szOutFile );
return FALSE;
}
pMap[ i ] = ( i % btSpT ) + 1;
}
}
cf.Seek( 5, SEEK_SET );
if ( !cf.Write( pMap, iMapSize ) )
{
sprintf( m_szLastError, "SCP: Can't write!" );
delete [] pMap;
cf.Close( );
unlink( szOutFile );
return FALSE;
}
delete [] pMap;
cf.Close();
return TRUE;
}
#endif //__CDISK_WRITE__
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