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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 "cfs_dos3.h"
#include "autil.h"
#define ROOT_DIR 0x10
#define FAT 0x18
CDos3::CDos3() : CFs()
{
#ifdef _MEMORY_DUMP_
printf( "CDos3 constructed: %08X\n", this );
#endif
}
CDos3::~CDos3()
{
Dismount();
#ifdef _MEMORY_DUMP_
printf( "CDos3 destructed: %08X\n", this );
#endif
}
BOOL CDos3::Mount( ADisk* pDisk )
{
m_iFilesValid = 0;
m_iFilesInvalid = 0;
m_pDisk = pDisk;
m_pRoot = NULL;
if ( m_pDisk->GetSectorSize() != 0x80 )
{
sprintf( m_szLastError, "DOS3: Can't process DD disk!" );
return FALSE;
}
CDos3DirEntry* pPrev = NULL;
DOS3_DIRENT dire;
WORD wEntry = 1;
if ( !pDisk->ReadSector( m_abtFat, FAT ) )
{
sprintf( m_szLastError, "DOS3: Can't read FAT sector because\n%s", m_pDisk->GetLastError() );
return FALSE;
}
do
{
BYTE abtSec[ 0x100 ];
if ( !pDisk->ReadSector( abtSec, ROOT_DIR + ( wEntry / 8 ) ) )
{
sprintf( m_szLastError, "DOS3: Can't read directory entry %04X because\n%s", wEntry, m_pDisk->GetLastError() );
return FALSE;
}
memcpy( &dire, abtSec + ( wEntry % 8) * sizeof( DOS3_DIRENT ), sizeof( DOS3_DIRENT ) );
if ( !dire.btFlags )
break;
CDos3DirEntry* pE = CreateEntry( &dire );
if ( pE && ! ( pE->m_dwFlags & DIRE_DELETED ) )
{
if ( m_pRoot )
{
pPrev->m_pNext = pE;
pE->m_pPrev = pPrev;
pPrev = pE;
}
else
{
m_pRoot = pE;
pPrev = pE;
}
}
wEntry++;
} while( dire.btFlags );
return TRUE;
}
void CDos3::Dismount()
{
DeleteList( m_pRoot );
}
CDos3DirEntry* CDos3::CreateEntry( DOS3_DIRENT* pDire )
{
CDos3DirEntry* pE = new CDos3DirEntry();
if ( !pE )
return NULL;
if ( pDire->btFlags == 0x80 )
{
pE->m_dwFlags |= DIRE_DELETED;
}
ADos2MsDos( pE->m_szFname, pDire->acAtariName );
//sprintf( pE->m_szAscData, "%02X %02X %02X %04X", pDire->btSecStart, pDire->btSecCount, pDire->btFlags, pDire->wFileLen );
sprintf( pE->m_szAscData, "%02X %04X", pDire->btFlags, pDire->wFileLen );
pE->m_btSecStart = pDire->btSecStart;
pE->m_btSecCount = pDire->btSecCount;
pE->m_btFlags = pDire->btFlags;
pE->m_wFileLen = pDire->wFileLen;
if ( pE->m_dwFlags & DIRE_DELETED )
{
}
else if ( ExportFile( NULL, pE ) )
m_iFilesValid++;
else
m_iFilesInvalid++;
return pE;
}
BOOL CDos3::ExportFile( char* szOutFile, CDirEntry* pDirE )
{
int hOutfile = -1;
if ( szOutFile )
{
hOutfile = open( szOutFile, O_BINARY | O_CREAT | O_TRUNC | O_WRONLY, 0666 );
if ( -1 == hOutfile )
{
sprintf( m_szLastError, "DOS3: Unable to create file '%s'!", szOutFile );
return FALSE;
}
}
BYTE abtBuff[ 0x80 * 8 ];
BYTE btSecCount = ((CDos3DirEntry*)pDirE) ->m_btSecCount;
BYTE btSector = ((CDos3DirEntry*)pDirE) ->m_btSecStart;
WORD wFileLen = ((CDos3DirEntry*)pDirE) ->m_wFileLen;
while( btSecCount )
{
WORD wToCopy = ( wFileLen < 0x400 ) ? wFileLen : 0x400;
if ( !m_pDisk->ReadSectors( abtBuff, ( btSector * 8 ) + FAT + 1, 8 ) )
{
{
sprintf( m_szLastError, "DOS3: Corrupted file '%s'\n%s\n", szOutFile, m_pDisk->GetLastError() );
return FALSE;
}
}
if ( -1 != hOutfile )
write( hOutfile, abtBuff, wToCopy );
btSecCount--;
wFileLen -= wToCopy;
btSector = m_abtFat[ btSector ];
if ( wToCopy == 0x400 )
{
if ( btSector >= 0xFD )
{
sprintf( m_szLastError, "DOS3: Corrupted file '%s' (unexpected EOF)", szOutFile );
return FALSE;
}
}
else
{
if ( btSector != 0xFD )
{
sprintf( m_szLastError, "DOS3: Corrupted file '%s' (missed EOF) %02X", szOutFile, btSector );
return FALSE;
}
}
}
if ( -1 != hOutfile )
close( hOutfile );
return TRUE;
}
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