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AppleWin/source/DiskImageHelper.cpp

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/*
AppleWin : An Apple //e emulator for Windows
Copyright (C) 1994-1996, Michael O'Brien
Copyright (C) 1999-2001, Oliver Schmidt
Copyright (C) 2002-2005, Tom Charlesworth
Copyright (C) 2006-2010, Tom Charlesworth, Michael Pohoreski
AppleWin 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
(at your option) any later version.
AppleWin 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 AppleWin; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Description: Disk Image Helper
*
* Author: Tom
*/
#include "StdAfx.h"
#include "Core.h"
#include "DiskImageHelper.h"
#include "Common.h"
#include "zlib.h"
#include "unzip.h"
#include "CPU.h"
#include "DiskImage.h"
#include "Log.h"
#include "Memory.h"
#include "Interface.h"
ImageInfo::ImageInfo()
{
// this is not a POD as it contains c++ strings
// simply zeroing is not going to work
pImageType = NULL;
pImageHelper = NULL;
FileType = eFileNormal;
hFile = INVALID_HANDLE_VALUE;
uOffset = 0;
bWriteProtected = false;
uImageSize = 0;
memset(&zipFileInfo, 0, sizeof(zipFileInfo));
uNumEntriesInZip = 0;
uNumValidImagesInZip = 0;
uNumTracks = 0;
pImageBuffer = NULL;
pWOZTrackMap = NULL;
optimalBitTiming = 0;
bootSectorFormat = CWOZHelper::bootUnknown;
maxNibblesPerTrack = 0;
}
CImageBase::CImageBase()
: m_uNumTracksInImage(0)
, m_uVolumeNumber(DEFAULT_VOLUME_NUMBER)
{
m_pWorkBuffer = new BYTE[TRACK_DENIBBLIZED_SIZE * 2];
}
CImageBase::~CImageBase()
{
delete [] m_pWorkBuffer;
m_pWorkBuffer = NULL;
}
/* DO logical order 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/* physical order 0 D B 9 7 5 3 1 E C A 8 6 4 2 F */
/* PO logical order 0 E D C B A 9 8 7 6 5 4 3 2 1 F */
/* physical order 0 2 4 6 8 A C E 1 3 5 7 9 B D F */
BYTE CImageBase::ms_DiskByte[0x40] =
{
0x96,0x97,0x9A,0x9B,0x9D,0x9E,0x9F,0xA6,
0xA7,0xAB,0xAC,0xAD,0xAE,0xAF,0xB2,0xB3,
0xB4,0xB5,0xB6,0xB7,0xB9,0xBA,0xBB,0xBC,
0xBD,0xBE,0xBF,0xCB,0xCD,0xCE,0xCF,0xD3,
0xD6,0xD7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,
0xDF,0xE5,0xE6,0xE7,0xE9,0xEA,0xEB,0xEC,
0xED,0xEE,0xEF,0xF2,0xF3,0xF4,0xF5,0xF6,
0xF7,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
};
BYTE CImageBase::ms_SectorNumber[NUM_SECTOR_ORDERS][0x10] =
{
{0x00,0x08,0x01,0x09,0x02,0x0A,0x03,0x0B, 0x04,0x0C,0x05,0x0D,0x06,0x0E,0x07,0x0F},
{0x00,0x07,0x0E,0x06,0x0D,0x05,0x0C,0x04, 0x0B,0x03,0x0A,0x02,0x09,0x01,0x08,0x0F},
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
};
//-----------------------------------------------------------------------------
bool CImageBase::WriteImageHeader(ImageInfo* pImageInfo, LPBYTE pHdr, const UINT hdrSize)
{
return WriteImageData(pImageInfo, pHdr, hdrSize, 0);
}
//-----------------------------------------------------------------------------
bool CImageBase::ReadTrack(ImageInfo* pImageInfo, const int nTrack, LPBYTE pTrackBuffer, const UINT uTrackSize)
{
const long offset = pImageInfo->uOffset + nTrack * uTrackSize;
memcpy(pTrackBuffer, &pImageInfo->pImageBuffer[offset], uTrackSize);
return true;
}
//-------------------------------------
bool CImageBase::WriteTrack(ImageInfo* pImageInfo, const int nTrack, LPBYTE pTrackBuffer, const UINT uTrackSize)
{
const long offset = pImageInfo->uOffset + nTrack * uTrackSize;
memcpy(&pImageInfo->pImageBuffer[offset], pTrackBuffer, uTrackSize);
return WriteImageData(pImageInfo, pTrackBuffer, uTrackSize, offset);
}
//-----------------------------------------------------------------------------
bool CImageBase::ReadBlock(ImageInfo* pImageInfo, const int nBlock, LPBYTE pBlockBuffer)
{
long Offset = pImageInfo->uOffset + nBlock * HD_BLOCK_SIZE;
if (pImageInfo->FileType == eFileNormal)
{
if (pImageInfo->hFile == INVALID_HANDLE_VALUE)
return false;
SetFilePointer(pImageInfo->hFile, Offset, NULL, FILE_BEGIN);
DWORD dwBytesRead;
BOOL bRes = ReadFile(pImageInfo->hFile, pBlockBuffer, HD_BLOCK_SIZE, &dwBytesRead, NULL);
if (!bRes || dwBytesRead != HD_BLOCK_SIZE)
return false;
}
else if ((pImageInfo->FileType == eFileGZip) || (pImageInfo->FileType == eFileZip))
{
memcpy(pBlockBuffer, &pImageInfo->pImageBuffer[Offset], HD_BLOCK_SIZE);
}
else
{
_ASSERT(0);
return false;
}
return true;
}
//-------------------------------------
bool CImageBase::WriteBlock(ImageInfo* pImageInfo, const int nBlock, LPBYTE pBlockBuffer)
{
long offset = pImageInfo->uOffset + nBlock * HD_BLOCK_SIZE;
const bool bGrowImageBuffer = (UINT)offset+HD_BLOCK_SIZE > pImageInfo->uImageSize;
if (pImageInfo->FileType == eFileGZip || pImageInfo->FileType == eFileZip)
{
if (bGrowImageBuffer)
{
// Horribly inefficient! (Unzip to a normal file if you want better performance!)
const UINT uNewImageSize = offset+HD_BLOCK_SIZE;
BYTE* pNewImageBuffer = new BYTE [uNewImageSize];
memcpy(pNewImageBuffer, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
memset(&pNewImageBuffer[pImageInfo->uImageSize], 0, uNewImageSize-pImageInfo->uImageSize); // Should always be HD_BLOCK_SIZE (so this is redundant)
delete [] pImageInfo->pImageBuffer;
pImageInfo->pImageBuffer = pNewImageBuffer;
pImageInfo->uImageSize = uNewImageSize;
}
memcpy(&pImageInfo->pImageBuffer[offset], pBlockBuffer, HD_BLOCK_SIZE);
}
if (!WriteImageData(pImageInfo, pBlockBuffer, HD_BLOCK_SIZE, offset))
{
_ASSERT(0);
return false;
}
if (pImageInfo->FileType == eFileNormal)
{
if (bGrowImageBuffer)
pImageInfo->uImageSize += HD_BLOCK_SIZE;
}
return true;
}
//-----------------------------------------------------------------------------
bool CImageBase::WriteImageData(ImageInfo* pImageInfo, LPBYTE pSrcBuffer, const UINT uSrcSize, const long offset)
{
if (pImageInfo->FileType == eFileNormal)
{
if (pImageInfo->hFile == INVALID_HANDLE_VALUE)
return false;
if (SetFilePointer(pImageInfo->hFile, offset, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
{
DWORD err = GetLastError();
return false;
}
DWORD dwBytesWritten;
BOOL bRes = WriteFile(pImageInfo->hFile, pSrcBuffer, uSrcSize, &dwBytesWritten, NULL);
_ASSERT(dwBytesWritten == uSrcSize);
if (!bRes || dwBytesWritten != uSrcSize)
return false;
}
else if (pImageInfo->FileType == eFileGZip)
{
// Write entire compressed image each time (dirty track change or dirty disk removal or a HDD block is written)
gzFile hGZFile = gzopen(pImageInfo->szFilename.c_str(), "wb");
if (hGZFile == NULL)
return false;
int nLen = gzwrite(hGZFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
int nRes = gzclose(hGZFile); // close before returning (due to error) to avoid resource leak
hGZFile = NULL;
if (nLen != pImageInfo->uImageSize)
return false;
if (nRes != Z_OK)
return false;
}
else if (pImageInfo->FileType == eFileZip)
{
// Write entire compressed image each time (dirty track change or dirty disk removal or a HDD block is written)
// NB. Only support Zip archives with a single file
// - there is no delete in a zipfile, so would need to copy files from old to new zip file!
_ASSERT(pImageInfo->uNumEntriesInZip == 1); // Should never occur, since image will be write-protected in CheckZipFile()
if (pImageInfo->uNumEntriesInZip > 1)
return false;
zipFile hZipFile = zipOpen(pImageInfo->szFilename.c_str(), APPEND_STATUS_CREATE);
if (hZipFile == NULL)
return false;
int nOpenedFileInZip = ZIP_BADZIPFILE;
try
{
nOpenedFileInZip = zipOpenNewFileInZip(hZipFile, pImageInfo->szFilenameInZip.c_str(), &pImageInfo->zipFileInfo, NULL, 0, NULL, 0, NULL, Z_DEFLATED, Z_BEST_SPEED);
if (nOpenedFileInZip != ZIP_OK)
throw false;
int nRes = zipWriteInFileInZip(hZipFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
if (nRes != ZIP_OK)
throw false;
nOpenedFileInZip = ZIP_BADZIPFILE;
nRes = zipCloseFileInZip(hZipFile);
if (nRes != ZIP_OK)
throw false;
}
catch (bool)
{
if (nOpenedFileInZip == ZIP_OK)
zipCloseFileInZip(hZipFile);
zipClose(hZipFile, NULL);
return false;
}
int nRes = zipClose(hZipFile, NULL);
if (nRes != ZIP_OK)
return false;
}
else
{
_ASSERT(0);
return false;
}
return true;
}
//-----------------------------------------------------------------------------
LPBYTE CImageBase::Code62(int sector)
{
// CONVERT THE 256 8-BIT BYTES INTO 342 6-BIT BYTES, WHICH WE STORE
// STARTING AT 4K INTO THE WORK BUFFER.
{
LPBYTE sectorbase = m_pWorkBuffer+(sector << 8);
LPBYTE resultptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
BYTE offset = 0xAC;
while (offset != 0x02)
{
BYTE value = 0;
#define ADDVALUE(a) value = (value << 2) | \
(((a) & 0x01) << 1) | \
(((a) & 0x02) >> 1)
ADDVALUE(*(sectorbase+offset)); offset -= 0x56;
ADDVALUE(*(sectorbase+offset)); offset -= 0x56;
ADDVALUE(*(sectorbase+offset)); offset -= 0x53;
#undef ADDVALUE
*(resultptr++) = value << 2;
}
*(resultptr-2) &= 0x3F;
*(resultptr-1) &= 0x3F;
int loop = 0;
while (loop < 0x100)
*(resultptr++) = *(sectorbase+(loop++));
}
// EXCLUSIVE-OR THE ENTIRE DATA BLOCK WITH ITSELF OFFSET BY ONE BYTE,
// CREATING A 343RD BYTE WHICH IS USED AS A CHECKSUM. STORE THE NEW
// BLOCK OF 343 BYTES STARTING AT 5K INTO THE WORK BUFFER.
{
BYTE savedval = 0;
LPBYTE sourceptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE resultptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
int loop = 342;
while (loop--)
{
*(resultptr++) = savedval ^ *sourceptr;
savedval = *(sourceptr++);
}
*resultptr = savedval;
}
// USING A LOOKUP TABLE, CONVERT THE 6-BIT BYTES INTO DISK BYTES. A VALID
// DISK BYTE IS A BYTE THAT HAS THE HIGH BIT SET, AT LEAST TWO ADJACENT
// BITS SET (EXCLUDING THE HIGH BIT), AND AT MOST ONE PAIR OF CONSECUTIVE
// ZERO BITS. THE CONVERTED BLOCK OF 343 BYTES IS STORED STARTING AT 4K
// INTO THE WORK BUFFER.
{
LPBYTE sourceptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
LPBYTE resultptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
int loop = 343;
while (loop--)
*(resultptr++) = ms_DiskByte[(*(sourceptr++)) >> 2];
}
return m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
}
//-------------------------------------
void CImageBase::Decode62(LPBYTE imageptr)
{
// IF WE HAVEN'T ALREADY DONE SO, GENERATE A TABLE FOR CONVERTING
// DISK BYTES BACK INTO 6-BIT BYTES
static BOOL tablegenerated = 0;
static BYTE sixbitbyte[0x80];
if (!tablegenerated)
{
memset(sixbitbyte, 0, 0x80);
int loop = 0;
while (loop < 0x40) {
sixbitbyte[ms_DiskByte[loop]-0x80] = loop << 2;
loop++;
}
tablegenerated = 1;
}
// USING OUR TABLE, CONVERT THE DISK BYTES BACK INTO 6-BIT BYTES
{
LPBYTE sourceptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE resultptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
int loop = 343;
while (loop--)
*(resultptr++) = sixbitbyte[*(sourceptr++) & 0x7F];
}
// EXCLUSIVE-OR THE ENTIRE DATA BLOCK WITH ITSELF OFFSET BY ONE BYTE
// TO UNDO THE EFFECTS OF THE CHECKSUMMING PROCESS
{
BYTE savedval = 0;
LPBYTE sourceptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
LPBYTE resultptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
int loop = 342;
while (loop--)
{
*resultptr = savedval ^ *(sourceptr++);
savedval = *(resultptr++);
}
}
// CONVERT THE 342 6-BIT BYTES INTO 256 8-BIT BYTES
{
LPBYTE lowbitsptr = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE sectorbase = m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x56;
BYTE offset = 0xAC;
while (offset != 0x02)
{
if (offset >= 0xAC)
{
*(imageptr+offset) = (*(sectorbase+offset) & 0xFC)
| (((*lowbitsptr) & 0x80) >> 7)
| (((*lowbitsptr) & 0x40) >> 5);
}
offset -= 0x56;
*(imageptr+offset) = (*(sectorbase+offset) & 0xFC)
| (((*lowbitsptr) & 0x20) >> 5)
| (((*lowbitsptr) & 0x10) >> 3);
offset -= 0x56;
*(imageptr+offset) = (*(sectorbase+offset) & 0xFC)
| (((*lowbitsptr) & 0x08) >> 3)
| (((*lowbitsptr) & 0x04) >> 1);
offset -= 0x53;
lowbitsptr++;
}
}
}
//-------------------------------------
void CImageBase::DenibblizeTrack(LPBYTE trackimage, SectorOrder_e SectorOrder, int nibbles)
{
memset(m_pWorkBuffer, 0, TRACK_DENIBBLIZED_SIZE);
// SEARCH THROUGH THE TRACK IMAGE FOR EACH SECTOR. FOR EVERY SECTOR
// WE FIND, COPY THE NIBBLIZED DATA FOR THAT SECTOR INTO THE WORK
// BUFFER AT OFFSET 4K. THEN CALL DECODE62() TO DENIBBLIZE THE DATA
// IN THE BUFFER AND WRITE IT INTO THE FIRST PART OF THE WORK BUFFER
// OFFSET BY THE SECTOR NUMBER.
#ifdef _DEBUG
UINT16 bmWrittenSectorAddrFields = 0x0000;
BYTE uWriteDataFieldPrologueCount = 0;
#endif
int offset = 0;
int partsleft = NUM_SECTORS*2+1; // TC: 32+1 prologues - need 1 extra if trackimage starts between Addr Field & Data Field
int sector = -1;
while (partsleft--)
{
BYTE byteval[3] = {0,0,0};
int bytenum = 0;
int loop = nibbles;
while ((loop--) && (bytenum < 3))
{
if (bytenum)
byteval[bytenum++] = *(trackimage+offset++);
else if (*(trackimage+offset++) == 0xD5)
bytenum = 1;
if (offset >= nibbles)
offset = 0;
}
if ((bytenum == 3) && (byteval[1] == 0xAA))
{
int loop = 0;
int tempoffset = offset;
while (loop < 384) // TODO-TC: Why 384? Only need 343 for Decode62()
{
*(m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+loop++) = *(trackimage+tempoffset++);
if (tempoffset >= nibbles)
tempoffset = 0;
}
if (byteval[2] == 0x96)
{
sector = ((*(m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+4) & 0x55) << 1)
| (*(m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+5) & 0x55);
#ifdef _DEBUG
_ASSERT( sector < NUM_SECTORS );
if (partsleft != 0)
{
_ASSERT( (bmWrittenSectorAddrFields & (1<<sector)) == 0 );
bmWrittenSectorAddrFields |= (1<<sector);
}
#endif
}
else if (byteval[2] == 0xAD)
{
if (sector >= 0 && sector < NUM_SECTORS)
{
#ifdef _DEBUG
uWriteDataFieldPrologueCount++;
_ASSERT(uWriteDataFieldPrologueCount <= NUM_SECTORS);
#endif
Decode62(m_pWorkBuffer+(ms_SectorNumber[SectorOrder][sector] << 8));
}
sector = 0;
}
}
}
}
//-------------------------------------
DWORD CImageBase::NibblizeTrack(LPBYTE trackimagebuffer, SectorOrder_e SectorOrder, int track)
{
memset(m_pWorkBuffer+TRACK_DENIBBLIZED_SIZE, 0, TRACK_DENIBBLIZED_SIZE);
LPBYTE imageptr = trackimagebuffer;
BYTE sector = 0;
// WRITE GAP ONE, WHICH CONTAINS 48 SELF-SYNC BYTES
int loop;
for (loop = 0; loop < 48; loop++)
*(imageptr++) = 0xFF;
while (sector < 16)
{
// WRITE THE ADDRESS FIELD, WHICH CONTAINS:
// - PROLOGUE (D5AA96)
// - VOLUME NUMBER ("4 AND 4" ENCODED)
// - TRACK NUMBER ("4 AND 4" ENCODED)
// - SECTOR NUMBER ("4 AND 4" ENCODED)
// - CHECKSUM ("4 AND 4" ENCODED)
// - EPILOGUE (DEAAEB)
*(imageptr++) = 0xD5;
*(imageptr++) = 0xAA;
*(imageptr++) = 0x96;
#define CODE44A(a) ((((a) >> 1) & 0x55) | 0xAA)
#define CODE44B(a) (((a) & 0x55) | 0xAA)
*(imageptr++) = CODE44A(m_uVolumeNumber);
*(imageptr++) = CODE44B(m_uVolumeNumber);
*(imageptr++) = CODE44A((BYTE)track);
*(imageptr++) = CODE44B((BYTE)track);
*(imageptr++) = CODE44A(sector);
*(imageptr++) = CODE44B(sector);
*(imageptr++) = CODE44A(m_uVolumeNumber ^ ((BYTE)track) ^ sector);
*(imageptr++) = CODE44B(m_uVolumeNumber ^ ((BYTE)track) ^ sector);
#undef CODE44A
#undef CODE44B
*(imageptr++) = 0xDE;
*(imageptr++) = 0xAA;
*(imageptr++) = 0xEB;
// WRITE GAP TWO, WHICH CONTAINS SIX SELF-SYNC BYTES
for (loop = 0; loop < 6; loop++)
*(imageptr++) = 0xFF;
// WRITE THE DATA FIELD, WHICH CONTAINS:
// - PROLOGUE (D5AAAD)
// - 343 6-BIT BYTES OF NIBBLIZED DATA, INCLUDING A 6-BIT CHECKSUM
// - EPILOGUE (DEAAEB)
*(imageptr++) = 0xD5;
*(imageptr++) = 0xAA;
*(imageptr++) = 0xAD;
memcpy(imageptr, Code62(ms_SectorNumber[SectorOrder][sector]), 343);
imageptr += 343;
*(imageptr++) = 0xDE;
*(imageptr++) = 0xAA;
*(imageptr++) = 0xEB;
// WRITE GAP THREE, WHICH CONTAINS 27 SELF-SYNC BYTES
for (loop = 0; loop < 27; loop++)
*(imageptr++) = 0xFF;
sector++;
}
return imageptr-trackimagebuffer;
}
//-------------------------------------
void CImageBase::SkewTrack(const int nTrack, const int nNumNibbles, const LPBYTE pTrackImageBuffer)
{
int nSkewBytes = (nTrack*768) % nNumNibbles;
memcpy(m_pWorkBuffer, pTrackImageBuffer, nNumNibbles);
memcpy(pTrackImageBuffer, m_pWorkBuffer+nSkewBytes, nNumNibbles-nSkewBytes);
memcpy(pTrackImageBuffer+nNumNibbles-nSkewBytes, m_pWorkBuffer, nSkewBytes);
}
//-------------------------------------
bool CImageBase::IsValidImageSize(const DWORD uImageSize)
{
m_uNumTracksInImage = 0;
if ((TRACKS_MAX>TRACKS_STANDARD) && (uImageSize > TRACKS_MAX*TRACK_DENIBBLIZED_SIZE))
return false; // >160KB
//
bool bValidSize = false;
if (uImageSize >= (TRACKS_STANDARD+1)*TRACK_DENIBBLIZED_SIZE)
{
// Is uImageSize == 140KB + n*4K? (where n>=1)
bValidSize = (((uImageSize - TRACKS_STANDARD*TRACK_DENIBBLIZED_SIZE) % TRACK_DENIBBLIZED_SIZE) == 0);
}
else
{
// TODO: Applewin.chm mentions images of size 143,616 bytes ("Disk Image Formats")
bValidSize = ( ((uImageSize >= 143105) && (uImageSize <= 143364)) ||
(uImageSize == 143403) ||
(uImageSize == 143488) );
}
if (bValidSize)
m_uNumTracksInImage = uImageSize / TRACK_DENIBBLIZED_SIZE;
return bValidSize;
}
//===========================================================================
// DOS ORDER (DO) FORMAT IMPLEMENTATION
class CDoImage : public CImageBase
{
public:
CDoImage(void) {}
virtual ~CDoImage(void) {}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
if (!IsValidImageSize(dwImageSize))
return eMismatch;
// CHECK FOR A DOS ORDER IMAGE OF A DOS DISKETTE
{
int loop = 0;
bool bMismatch = false;
while ((loop++ < 15) && !bMismatch)
{
if (*(pImage+0x11002+(loop << 8)) != loop-1)
bMismatch = true;
}
if (!bMismatch)
return eMatch;
}
// CHECK FOR A DOS ORDER IMAGE OF A PRODOS DISKETTE
{
int loop = 1;
bool bMismatch = false;
while ((loop++ < 5) && !bMismatch)
{
if ((*(LPWORD)(pImage+(loop << 9)+0x100) != ((loop == 5) ? 0 : 6-loop)) ||
(*(LPWORD)(pImage+(loop << 9)+0x102) != ((loop == 2) ? 0 : 8-loop)))
bMismatch = true;
}
if (!bMismatch)
return eMatch;
}
return ePossibleMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
const UINT track = PhaseToTrack(phase);
ReadTrack(pImageInfo, track, m_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eDOSOrder, track);
if (!enhanceDisk)
SkewTrack(track, *pNibbles, pTrackImageBuffer);
}
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
const UINT track = PhaseToTrack(phase);
DenibblizeTrack(pTrackImageBuffer, eDOSOrder, nNibbles);
WriteTrack(pImageInfo, track, m_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
}
virtual bool AllowCreate(void) { return true; }
virtual UINT GetImageSizeForCreate(void) { m_uNumTracksInImage = TRACKS_STANDARD; return TRACK_DENIBBLIZED_SIZE * TRACKS_STANDARD; }
virtual eImageType GetType(void) { return eImageDO; }
virtual const char* GetCreateExtensions(void) { return ".do;.dsk"; }
virtual const char* GetRejectExtensions(void) { return ".nib;.iie;.po;.prg"; }
};
//-------------------------------------
// PRODOS ORDER (PO) FORMAT IMPLEMENTATION
class CPoImage : public CImageBase
{
public:
CPoImage(void) {}
virtual ~CPoImage(void) {}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
if (!IsValidImageSize(dwImageSize))
return eMismatch;
// CHECK FOR A PRODOS ORDER IMAGE OF A DOS DISKETTE
{
int loop = 4;
bool bMismatch = false;
while ((loop++ < 13) && !bMismatch)
{
if (*(pImage+0x11002+(loop << 8)) != 14-loop)
bMismatch = true;
}
if (!bMismatch)
return eMatch;
}
// CHECK FOR A PRODOS ORDER IMAGE OF A PRODOS DISKETTE
{
int loop = 1;
bool bMismatch = false;
while ((loop++ < 5) && !bMismatch)
{
if ((*(LPWORD)(pImage+(loop << 9) ) != ((loop == 2) ? 0 : loop-1)) ||
(*(LPWORD)(pImage+(loop << 9)+2) != ((loop == 5) ? 0 : loop+1)))
bMismatch = true;
}
if (!bMismatch)
return eMatch;
}
return ePossibleMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
const UINT track = PhaseToTrack(phase);
ReadTrack(pImageInfo, track, m_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eProDOSOrder, track);
if (!enhanceDisk)
SkewTrack(track, *pNibbles, pTrackImageBuffer);
}
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
const UINT track = PhaseToTrack(phase);
DenibblizeTrack(pTrackImageBuffer, eProDOSOrder, nNibbles);
WriteTrack(pImageInfo, track, m_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
}
virtual eImageType GetType(void) { return eImagePO; }
virtual const char* GetCreateExtensions(void) { return ".po"; }
virtual const char* GetRejectExtensions(void) { return ".do;.iie;.nib;.prg;.woz"; }
};
//-------------------------------------
// NIBBLIZED 6656-NIBBLE (NIB) FORMAT IMPLEMENTATION
class CNib1Image : public CImageBase
{
public:
CNib1Image(void) {}
virtual ~CNib1Image(void) {}
static const UINT NIB1_TRACK_SIZE = NIBBLES_PER_TRACK_NIB;
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
if (dwImageSize < NIB1_TRACK_SIZE*TRACKS_STANDARD || dwImageSize % NIB1_TRACK_SIZE != 0 || dwImageSize > NIB1_TRACK_SIZE*TRACKS_MAX)
return eMismatch;
m_uNumTracksInImage = dwImageSize / NIB1_TRACK_SIZE;
for (UINT track=0; track<m_uNumTracksInImage; track++) // Quick NIB sanity check (GH#139)
{
BYTE* pTrack = &pImage[track*NIB1_TRACK_SIZE];
for (UINT byte=0; byte<NIB1_TRACK_SIZE; byte++)
{
if (pTrack[byte] != 0xD5) // find 1st D5 in track
continue;
UINT prologueHdr = 0;
for (int i=0; i<3; i++)
{
prologueHdr <<= 8;
prologueHdr |= pTrack[byte++];
if (byte == NIB1_TRACK_SIZE) byte = 0;
}
if (prologueHdr != 0xD5AA96 && prologueHdr != 0xD5AAB5) // ProDOS/DOS 3.3 or DOS 3.2
{
std::string warning = "Warning: T$%02X: NIB image's first D5 header isn't D5AA96 or D5AAB5 (found: %06X)\n";
LogOutput(warning.c_str(), track, prologueHdr);
LogFileOutput(warning.c_str(), track, prologueHdr);
}
break;
}
}
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
const UINT track = PhaseToTrack(phase);
ReadTrack(pImageInfo, track, pTrackImageBuffer, NIB1_TRACK_SIZE);
*pNibbles = NIB1_TRACK_SIZE;
}
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
_ASSERT(nNibbles == NIB1_TRACK_SIZE); // Must be true - as nNibbles gets init'd by ImageReadTrace()
const UINT track = PhaseToTrack(phase);
WriteTrack(pImageInfo, track, pTrackImageBuffer, nNibbles);
}
virtual bool AllowCreate(void) { return true; }
virtual UINT GetImageSizeForCreate(void) { m_uNumTracksInImage = TRACKS_STANDARD; return NIB1_TRACK_SIZE * TRACKS_STANDARD; }
virtual eImageType GetType(void) { return eImageNIB1; }
virtual const char* GetCreateExtensions(void) { return ".nib"; }
virtual const char* GetRejectExtensions(void) { return ".do;.iie;.po;.prg;.woz"; }
};
//-------------------------------------
// NIBBLIZED 6384-NIBBLE (NB2) FORMAT IMPLEMENTATION
class CNib2Image : public CImageBase
{
public:
CNib2Image(void) {}
virtual ~CNib2Image(void) {}
static const UINT NIB2_TRACK_SIZE = 6384;
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
if (dwImageSize != NIB2_TRACK_SIZE*TRACKS_STANDARD)
return eMismatch;
m_uNumTracksInImage = TRACKS_STANDARD;
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
const UINT track = PhaseToTrack(phase);
ReadTrack(pImageInfo, track, pTrackImageBuffer, NIB2_TRACK_SIZE);
*pNibbles = NIB2_TRACK_SIZE;
}
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
_ASSERT(nNibbles == NIB2_TRACK_SIZE); // Must be true - as nNibbles gets init'd by ImageReadTrace()
const UINT track = PhaseToTrack(phase);
WriteTrack(pImageInfo, track, pTrackImageBuffer, nNibbles);
}
virtual eImageType GetType(void) { return eImageNIB2; }
virtual const char* GetCreateExtensions(void) { return ".nb2"; }
virtual const char* GetRejectExtensions(void) { return ".do;.iie;.po;.prg;.woz;.2mg;.2img"; }
};
//-------------------------------------
// HDV image
class CHDVImage : public CImageBase
{
public:
CHDVImage(void) {}
virtual ~CHDVImage(void) {}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
m_uNumTracksInImage = dwImageSize / TRACK_DENIBBLIZED_SIZE; // Set to non-zero
// An HDV image can be any size (so if Ext == ".hdv" then accept any size)
if (*pszExt && !_tcscmp(pszExt, ".hdv"))
return eMatch;
if (dwImageSize < UNIDISK35_800K_SIZE)
return eMismatch;
return eMatch;
}
virtual bool Read(ImageInfo* pImageInfo, UINT nBlock, LPBYTE pBlockBuffer)
{
return ReadBlock(pImageInfo, nBlock, pBlockBuffer);
}
virtual bool Write(ImageInfo* pImageInfo, UINT nBlock, LPBYTE pBlockBuffer)
{
if (pImageInfo->bWriteProtected)
return false;
return WriteBlock(pImageInfo, nBlock, pBlockBuffer);
}
virtual eImageType GetType(void) { return eImageHDV; }
virtual const char* GetCreateExtensions(void) { return ".hdv"; }
virtual const char* GetRejectExtensions(void) { return ".do;.iie;.prg"; }
};
//-------------------------------------
// SIMSYSTEM IIE (IIE) FORMAT IMPLEMENTATION
class CIIeImage : public CImageBase
{
public:
CIIeImage(void) : m_pHeader(NULL) {}
virtual ~CIIeImage(void) { delete [] m_pHeader; }
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
if (strncmp((const char *)pImage, "SIMSYSTEM_IIE", 13) || (*(pImage+13) > 3))
return eMismatch;
m_uNumTracksInImage = TRACKS_STANDARD; // Assume default # tracks
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
UINT track = PhaseToTrack(phase);
// IF WE HAVEN'T ALREADY DONE SO, READ THE IMAGE FILE HEADER
if (!m_pHeader)
{
m_pHeader = new BYTE[88];
memset(m_pHeader, 0, 88);
DWORD dwBytesRead;
SetFilePointer(pImageInfo->hFile, 0, NULL,FILE_BEGIN);
ReadFile(pImageInfo->hFile, m_pHeader, 88, &dwBytesRead, NULL);
}
// IF THIS IMAGE CONTAINS USER DATA, READ THE TRACK AND NIBBLIZE IT
if (*(m_pHeader+13) <= 2)
{
ConvertSectorOrder(m_pHeader+14);
SetFilePointer(pImageInfo->hFile, track*TRACK_DENIBBLIZED_SIZE+30, NULL, FILE_BEGIN);
memset(m_pWorkBuffer, 0, TRACK_DENIBBLIZED_SIZE);
DWORD bytesread;
ReadFile(pImageInfo->hFile, m_pWorkBuffer, TRACK_DENIBBLIZED_SIZE, &bytesread, NULL);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eSIMSYSTEMOrder, track);
}
// OTHERWISE, IF THIS IMAGE CONTAINS NIBBLE INFORMATION, READ IT DIRECTLY INTO THE TRACK BUFFER
else
{
*pNibbles = *(LPWORD)(m_pHeader+track*2+14);
LONG Offset = 88;
while (track--)
Offset += *(LPWORD)(m_pHeader+track*2+14);
SetFilePointer(pImageInfo->hFile, Offset, NULL,FILE_BEGIN);
memset(pTrackImageBuffer, 0, *pNibbles);
DWORD dwBytesRead;
ReadFile(pImageInfo->hFile, pTrackImageBuffer, *pNibbles, &dwBytesRead, NULL);
}
}
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
// note: unimplemented
}
virtual eImageType GetType(void) { return eImageIIE; }
virtual const char* GetCreateExtensions(void) { return ".iie"; }
virtual const char* GetRejectExtensions(void) { return ".do.;.nib;.po;.prg;.woz;.2mg;.2img"; }
private:
void ConvertSectorOrder(LPBYTE sourceorder)
{
int loop = 16;
while (loop--)
{
BYTE found = 0xFF;
int loop2 = 16;
while (loop2-- && (found == 0xFF))
{
if (*(sourceorder+loop2) == loop)
found = loop2;
}
if (found == 0xFF)
found = 0;
ms_SectorNumber[2][loop] = found;
}
}
private:
LPBYTE m_pHeader;
};
//-------------------------------------
// RAW PROGRAM IMAGE (APL) FORMAT IMPLEMENTATION
class CAplImage : public CImageBase
{
public:
CAplImage(void) {}
virtual ~CAplImage(void) {}
virtual bool Boot(ImageInfo* ptr)
{
SetFilePointer(ptr->hFile, 0, NULL, FILE_BEGIN);
WORD address = 0;
WORD length = 0;
DWORD bytesread;
ReadFile(ptr->hFile, &address, sizeof(WORD), &bytesread, NULL);
ReadFile(ptr->hFile, &length , sizeof(WORD), &bytesread, NULL);
if ((((WORD)(address+length)) <= address) ||
(address >= 0xC000) ||
(address+length-1 >= 0xC000))
{
return false;
}
ReadFile(ptr->hFile, mem+address, length, &bytesread, NULL);
int loop = 192;
while (loop--)
*(memdirty+loop) = 0xFF;
regs.pc = address;
return true;
}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
DWORD dwLength = *(LPWORD)(pImage+2);
bool bRes = (((dwLength+4) == dwImageSize) ||
((dwLength+4+((256-((dwLength+4) & 255)) & 255)) == dwImageSize));
return !bRes ? eMismatch : ePossibleMatch;
}
virtual bool AllowBoot(void) { return true; }
virtual bool AllowRW(void) { return false; }
virtual eImageType GetType(void) { return eImageAPL; }
virtual const char* GetCreateExtensions(void) { return ".apl"; }
virtual const char* GetRejectExtensions(void) { return ".do;.dsk;.iie;.nib;.po;.woz;.2mg;.2img"; }
};
//-------------------------------------
class CPrgImage : public CImageBase
{
public:
CPrgImage(void) {}
virtual ~CPrgImage(void) {}
virtual bool Boot(ImageInfo* pImageInfo)
{
SetFilePointer(pImageInfo->hFile, 5, NULL, FILE_BEGIN);
WORD address = 0;
WORD length = 0;
DWORD bytesread;
ReadFile(pImageInfo->hFile, &address, sizeof(WORD), &bytesread, NULL);
ReadFile(pImageInfo->hFile, &length , sizeof(WORD), &bytesread, NULL);
length <<= 1;
if ((((WORD)(address+length)) <= address) ||
(address >= 0xC000) ||
(address+length-1 >= 0xC000))
{
return false;
}
SetFilePointer(pImageInfo->hFile,128,NULL,FILE_BEGIN);
ReadFile(pImageInfo->hFile, mem+address, length, &bytesread, NULL);
int loop = 192;
while (loop--)
*(memdirty+loop) = 0xFF;
regs.pc = address;
return true;
}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
return (*(LPDWORD)pImage == 0x214C470A) ? eMatch : eMismatch; // "!LG\x0A"
}
virtual bool AllowBoot(void) { return true; }
virtual bool AllowRW(void) { return false; }
virtual eImageType GetType(void) { return eImagePRG; }
virtual const char* GetCreateExtensions(void) { return ".prg"; }
virtual const char* GetRejectExtensions(void) { return ".do;.dsk;.iie;.nib;.po;.woz;.2mg;.2img"; }
};
//-------------------------------------
class CWOZImageHelper
{
public:
CWOZImageHelper(void)
{
m_pWOZEmptyTrack = new BYTE[CWOZHelper::EMPTY_TRACK_SIZE];
srand(1); // Use a fixed seed for determinism
for (UINT i = 0; i < CWOZHelper::EMPTY_TRACK_SIZE; i++)
{
BYTE n = 0;
for (UINT j = 0; j < 8; j++)
{
if (rand() < RAND_THRESHOLD(3, 10)) // ~30% of buffer are 1 bits
n |= 1 << j;
}
m_pWOZEmptyTrack[i] = n;
}
}
virtual ~CWOZImageHelper(void) { delete [] m_pWOZEmptyTrack; }
void ReadEmptyTrack(LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount)
{
memcpy(pTrackImageBuffer, m_pWOZEmptyTrack, CWOZHelper::EMPTY_TRACK_SIZE);
*pNibbles = CWOZHelper::EMPTY_TRACK_SIZE;
*pBitCount = CWOZHelper::EMPTY_TRACK_SIZE * 8;
return;
}
bool UpdateWOZHeaderCRC(ImageInfo* pImageInfo, CImageBase* pImageBase, UINT extendedSize)
{
BYTE* pImage = pImageInfo->pImageBuffer;
CWOZHelper::WOZHeader* pWozHdr = (CWOZHelper::WOZHeader*) pImage;
pWozHdr->crc32 = crc32(0, pImage+sizeof(CWOZHelper::WOZHeader), pImageInfo->uImageSize-sizeof(CWOZHelper::WOZHeader));
return pImageBase->WriteImageHeader(pImageInfo, pImage, sizeof(CWOZHelper::WOZHeader)+extendedSize);
}
private:
BYTE* m_pWOZEmptyTrack;
};
//-------------------------------------
class CWOZ1Image : public CImageBase, private CWOZImageHelper
{
public:
CWOZ1Image(void) {}
virtual ~CWOZ1Image(void) {}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
CWOZHelper::WOZHeader* pWozHdr = (CWOZHelper::WOZHeader*) pImage;
if (pWozHdr->id1 != CWOZHelper::ID1_WOZ1 || pWozHdr->id2 != CWOZHelper::ID2)
return eMismatch;
m_uNumTracksInImage = CWOZHelper::MAX_TRACKS_5_25;
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
BYTE* pTrackMap = ((CWOZHelper::Tmap*)pImageInfo->pWOZTrackMap)->tmap;
const BYTE indexFromTMAP = pTrackMap[(UINT)(phase * 2)];
if (indexFromTMAP == CWOZHelper::TMAP_TRACK_EMPTY)
return ReadEmptyTrack(pTrackImageBuffer, pNibbles, pBitCount);
ReadTrack(pImageInfo, indexFromTMAP, pTrackImageBuffer, CWOZHelper::WOZ1_TRACK_SIZE);
CWOZHelper::TRKv1* pTRK = (CWOZHelper::TRKv1*) &pTrackImageBuffer[CWOZHelper::WOZ1_TRK_OFFSET];
*pBitCount = pTRK->bitCount;
*pNibbles = pTRK->bytesUsed;
}
// TODO: support writing a bitCount (ie. fractional nibbles)
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
if (nNibbles > CWOZHelper::WOZ1_TRK_OFFSET)
{
_ASSERT(0);
LogFileOutput("WOZ1 Write Track: failed - track too big (%08X, phase=%f) for file: %s\n", nNibbles, phase, pImageInfo->szFilename.c_str());
return;
}
UINT hdrExtendedSize = 0;
const UINT trkExtendedSize = CWOZHelper::WOZ1_TRACK_SIZE;
BYTE* pTrackMap = ((CWOZHelper::Tmap*)pImageInfo->pWOZTrackMap)->tmap;
BYTE indexFromTMAP = pTrackMap[(UINT)(phase * 2)];
if (indexFromTMAP == CWOZHelper::TMAP_TRACK_EMPTY)
{
const BYTE track = (BYTE)(phase*2);
{
int highestIdx = -1;
for (UINT i=0; i<CWOZHelper::MAX_QUARTER_TRACKS_5_25; i++)
{
if (pTrackMap[i] != CWOZHelper::TMAP_TRACK_EMPTY && pTrackMap[i] > highestIdx)
highestIdx = pTrackMap[i];
}
indexFromTMAP = (highestIdx == -1) ? 0 : highestIdx+1;
}
pTrackMap[track] = indexFromTMAP;
if (track-1 >= 0) pTrackMap[track-1] = indexFromTMAP; // WOZ spec: track is also visible from neighboring quarter tracks
if (track+1 < CWOZHelper::MAX_QUARTER_TRACKS_5_25) pTrackMap[track+1] = indexFromTMAP;
const UINT newImageSize = pImageInfo->uImageSize + trkExtendedSize;
BYTE* pNewImageBuffer = new BYTE[newImageSize];
memcpy(pNewImageBuffer, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
// NB. delete old pImageBuffer: pWOZTrackMap updated in WOZUpdateInfo() by parent function
delete [] pImageInfo->pImageBuffer;
pTrackMap = NULL; // invalidate
pImageInfo->pImageBuffer = pNewImageBuffer;
pImageInfo->uImageSize = newImageSize;
// NB. pTrackImageBuffer[] is at least WOZ1_TRACK_SIZE in size
memset(&pTrackImageBuffer[nNibbles], 0, CWOZHelper::WOZ1_TRACK_SIZE-nNibbles);
CWOZHelper::TRKv1* pTRK = (CWOZHelper::TRKv1*) &pTrackImageBuffer[CWOZHelper::WOZ1_TRK_OFFSET];
pTRK->bytesUsed = nNibbles;
pTRK->bitCount = nNibbles * 8;
CWOZHelper::WOZChunkHdr* pTrksHdr = (CWOZHelper::WOZChunkHdr*) &pImageInfo->pImageBuffer[pImageInfo->uOffset - sizeof(CWOZHelper::WOZChunkHdr)];
pTrksHdr->size += trkExtendedSize;
hdrExtendedSize = pImageInfo->uOffset - sizeof(CWOZHelper::WOZHeader);
}
// NB. pTrackImageBuffer[] is at least WOZ1_TRACK_SIZE in size
{
CWOZHelper::TRKv1* pTRK = (CWOZHelper::TRKv1*) &pTrackImageBuffer[CWOZHelper::WOZ1_TRK_OFFSET];
UINT bitCount = pTRK->bitCount;
UINT trackSize = pTRK->bytesUsed;
_ASSERT(trackSize == nNibbles);
if (trackSize != nNibbles)
{
_ASSERT(0);
LogFileOutput("WOZ1 Write Track: (warning) attempting to write %08X when trackSize is %08X (phase=%f)\n", nNibbles, trackSize, phase);
// NB. just a warning, not a failure (therefore nNibbles < WOZ1_TRK_OFFSET, due to check at start of function)
}
}
if (!WriteTrack(pImageInfo, indexFromTMAP, pTrackImageBuffer, trkExtendedSize))
{
_ASSERT(0);
LogFileOutput("WOZ1 Write Track: failed to write track (phase=%f) for file: %s\n", phase, pImageInfo->szFilename.c_str());
return;
}
// TODO: zip/gzip: combine the track & hdr writes so that the file is only compressed & written once
if (!UpdateWOZHeaderCRC(pImageInfo, this, hdrExtendedSize))
{
_ASSERT(0);
LogFileOutput("WOZ1 Write Track: failed to write header CRC for file: %s\n", pImageInfo->szFilename.c_str());
}
}
virtual eImageType GetType(void) { return eImageWOZ1; }
virtual const char* GetCreateExtensions(void) { return ".woz"; }
virtual const char* GetRejectExtensions(void) { return ".do;.dsk;.nib;.iie;.po;.prg"; }
};
//-------------------------------------
class CWOZ2Image : public CImageBase, private CWOZImageHelper
{
public:
CWOZ2Image(void) {}
virtual ~CWOZ2Image(void) {}
virtual eDetectResult Detect(const LPBYTE pImage, const DWORD dwImageSize, const TCHAR* pszExt)
{
CWOZHelper::WOZHeader* pWozHdr = (CWOZHelper::WOZHeader*) pImage;
if (pWozHdr->id1 != CWOZHelper::ID1_WOZ2 || pWozHdr->id2 != CWOZHelper::ID2)
return eMismatch;
m_uNumTracksInImage = CWOZHelper::MAX_TRACKS_5_25;
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int* pNibbles, UINT* pBitCount, bool enhanceDisk)
{
BYTE* pTrackMap = ((CWOZHelper::Tmap*)pImageInfo->pWOZTrackMap)->tmap;
const BYTE indexFromTMAP = pTrackMap[(BYTE)(phase * 2)];
if (indexFromTMAP == CWOZHelper::TMAP_TRACK_EMPTY)
return ReadEmptyTrack(pTrackImageBuffer, pNibbles, pBitCount);
CWOZHelper::TRKv2* pTRKS = (CWOZHelper::TRKv2*) &pImageInfo->pImageBuffer[pImageInfo->uOffset];
CWOZHelper::TRKv2* pTRK = &pTRKS[indexFromTMAP];
*pBitCount = pTRK->bitCount;
*pNibbles = (pTRK->bitCount+7) / 8;
const UINT maxNibblesPerTrack = pImageInfo->maxNibblesPerTrack;
if (*pNibbles > (int)maxNibblesPerTrack)
{
_ASSERT(0);
LogFileOutput("WOZ2 Read Track: attempting to read more than max nibbles! (phase=%f)\n", phase);
return ReadEmptyTrack(pTrackImageBuffer, pNibbles, pBitCount); // TODO: Enlarge track buffer, but for now just return an empty track
}
memcpy(pTrackImageBuffer, &pImageInfo->pImageBuffer[pTRK->startBlock*CWOZHelper::BLOCK_SIZE], *pNibbles);
}
// TODO: support writing a bitCount (ie. fractional nibbles)
virtual void Write(ImageInfo* pImageInfo, const float phase, LPBYTE pTrackImageBuffer, int nNibbles)
{
UINT hdrExtendedSize = 0;
UINT trkExtendedSize = nNibbles;
BYTE* pTrackMap = ((CWOZHelper::Tmap*)pImageInfo->pWOZTrackMap)->tmap;
BYTE indexFromTMAP = pTrackMap[(BYTE)(phase * 2)];
if (indexFromTMAP == CWOZHelper::TMAP_TRACK_EMPTY)
{
const BYTE track = (BYTE)(phase*2);
{
int highestIdx = -1;
for (UINT i=0; i<CWOZHelper::MAX_QUARTER_TRACKS_5_25; i++)
{
if (pTrackMap[i] != CWOZHelper::TMAP_TRACK_EMPTY && pTrackMap[i] > highestIdx)
highestIdx = pTrackMap[i];
}
indexFromTMAP = (highestIdx == -1) ? 0 : highestIdx+1;
}
pTrackMap[track] = indexFromTMAP;
if (track-1 >= 0) pTrackMap[track-1] = indexFromTMAP; // WOZ spec: track is also visible from neighboring quarter tracks
if (track+1 < CWOZHelper::MAX_QUARTER_TRACKS_5_25) pTrackMap[track+1] = indexFromTMAP;
trkExtendedSize = (nNibbles + CWOZHelper::BLOCK_SIZE-1) & ~(CWOZHelper::BLOCK_SIZE-1);
const UINT newImageSize = pImageInfo->uImageSize + trkExtendedSize;
BYTE* pNewImageBuffer = new BYTE[newImageSize];
memcpy(pNewImageBuffer, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
memset(pNewImageBuffer+pImageInfo->uImageSize, 0, trkExtendedSize);
// NB. delete old pImageBuffer: pWOZTrackMap updated in WOZUpdateInfo() by parent function
delete [] pImageInfo->pImageBuffer;
pTrackMap = NULL; // invalidate
pImageInfo->pImageBuffer = pNewImageBuffer;
pImageInfo->uImageSize = newImageSize;
CWOZHelper::TRKv2* pTRKS = (CWOZHelper::TRKv2*) &pImageInfo->pImageBuffer[pImageInfo->uOffset];
CWOZHelper::TRKv2* pTRK = &pTRKS[indexFromTMAP];
pTRK->blockCount = trkExtendedSize / CWOZHelper::BLOCK_SIZE;
pTRK->startBlock = 3;
for (UINT i=0; i<indexFromTMAP; i++)
pTRK->startBlock += pTRKS[i].blockCount;
pTRK->bitCount = nNibbles * 8;
CWOZHelper::WOZChunkHdr* pTrksHdr = (CWOZHelper::WOZChunkHdr*) (&pImageInfo->pImageBuffer[pImageInfo->uOffset] - sizeof(CWOZHelper::WOZChunkHdr));
pTrksHdr->size += trkExtendedSize;
hdrExtendedSize = ((BYTE*)pTRKS + sizeof(CWOZHelper::Trks) - pNewImageBuffer) - sizeof(CWOZHelper::WOZHeader);
}
CWOZHelper::TRKv2* pTRKS = (CWOZHelper::TRKv2*) &pImageInfo->pImageBuffer[pImageInfo->uOffset];
CWOZHelper::TRKv2* pTRK = &pTRKS[indexFromTMAP];
{
UINT bitCount = pTRK->bitCount;
UINT trackSize = (pTRK->bitCount + 7) / 8;
_ASSERT(trackSize == nNibbles);
if (trackSize != nNibbles)
{
_ASSERT(0);
LogFileOutput("WOZ2 Write Track: attempting to write %08X when trackSize is %08X (phase=%f)\n", nNibbles, trackSize, phase);
return;
}
}
const long offset = pTRK->startBlock * CWOZHelper::BLOCK_SIZE;
memcpy(&pImageInfo->pImageBuffer[offset], pTrackImageBuffer, nNibbles);
if (!WriteImageData(pImageInfo, &pImageInfo->pImageBuffer[offset], trkExtendedSize, offset))
{
_ASSERT(0);
LogFileOutput("WOZ2 Write Track: failed to write track (phase=%f) for file: %s\n", phase, pImageInfo->szFilename.c_str());
return;
}
// TODO: zip/gzip: combine the track & hdr writes so that the file is only compressed & written once
if (!UpdateWOZHeaderCRC(pImageInfo, this, hdrExtendedSize))
{
_ASSERT(0);
LogFileOutput("WOZ2 Write Track: failed to write header CRC for file: %s\n", pImageInfo->szFilename.c_str());
}
}
virtual bool AllowCreate(void) { return true; }
virtual UINT GetImageSizeForCreate(void) { m_uNumTracksInImage = CWOZHelper::MAX_TRACKS_5_25; return sizeof(CWOZHelper::WOZHeader); }
virtual eImageType GetType(void) { return eImageWOZ2; }
virtual const char* GetCreateExtensions(void) { return ".woz"; }
virtual const char* GetRejectExtensions(void) { return ".do;.dsk;.nib;.iie;.po;.prg"; }
};
//-----------------------------------------------------------------------------
eDetectResult CMacBinaryHelper::DetectHdr(LPBYTE& pImage, DWORD& dwImageSize, DWORD& dwOffset)
{
// DETERMINE WHETHER THE FILE HAS A 128-BYTE MACBINARY HEADER
if ((dwImageSize > uMacBinHdrSize) &&
(!*pImage) &&
(*(pImage+1) < 120) &&
(!*(pImage+*(pImage+1)+2)) &&
(*(pImage+0x7A) == 0x81) &&
(*(pImage+0x7B) == 0x81))
{
pImage += uMacBinHdrSize;
dwImageSize -= uMacBinHdrSize;
dwOffset = uMacBinHdrSize;
return eMatch;
}
return eMismatch;
}
//-----------------------------------------------------------------------------
eDetectResult C2IMGHelper::DetectHdr(LPBYTE& pImage, DWORD& dwImageSize, DWORD& dwOffset)
{
Header2IMG* pHdr = (Header2IMG*) pImage;
if (dwImageSize < sizeof(Header2IMG) || pHdr->FormatID != FormatID_2IMG || pHdr->HeaderSize != sizeof(Header2IMG))
return eMismatch;
// https://github.com/AppleWin/AppleWin/issues/317
// Work around some lazy implementations of the spec that set this value to 0 instead of the correct 1.
if (pHdr->Version > 1)
return eMismatch;
if (dwImageSize < sizeof(Header2IMG)+pHdr->DiskDataLength)
return eMismatch;
//
pImage += sizeof(Header2IMG);
dwImageSize = pHdr->DiskDataLength;
dwOffset += sizeof(Header2IMG);
switch (pHdr->ImageFormat)
{
case e2IMGFormatDOS33:
{
if (pHdr->DiskDataLength < TRACKS_STANDARD*TRACK_DENIBBLIZED_SIZE)
return eMismatch;
}
break;
case e2IMGFormatProDOS:
{
// FYI: GS image: PassengersontheWind.2mg has DiskDataLength==0
dwImageSize = pHdr->DiskDataLength ? pHdr->DiskDataLength : pHdr->NumBlocks * HD_BLOCK_SIZE;
if (m_bIsFloppy)
{
if (dwImageSize < TRACKS_STANDARD*TRACK_DENIBBLIZED_SIZE)
return eMismatch;
if (dwImageSize <= TRACKS_MAX*TRACK_DENIBBLIZED_SIZE)
break;
if (dwImageSize == UNIDISK35_800K_SIZE) // TODO: For //c+, eg. Prince of Persia (Original 3.5 floppy for IIc+).2MG
return eMismatch;
return eMismatch;
}
}
break;
case e2IMGFormatNIBData:
{
if (pHdr->DiskDataLength != TRACKS_STANDARD*NIBBLES_PER_TRACK_NIB)
return eMismatch;
}
break;
default:
return eMismatch;
}
memcpy(&m_Hdr, pHdr, sizeof(m_Hdr));
return eMatch;
}
BYTE C2IMGHelper::GetVolumeNumber(void)
{
if (m_Hdr.ImageFormat != e2IMGFormatDOS33 || !m_Hdr.Flags.bDOS33VolumeNumberValid)
return DEFAULT_VOLUME_NUMBER;
return m_Hdr.Flags.VolumeNumber;
}
bool C2IMGHelper::IsLocked(void)
{
return m_Hdr.Flags.bDiskImageLocked;
}
//-----------------------------------------------------------------------------
// Pre: already matched the WOZ header
eDetectResult CWOZHelper::ProcessChunks(ImageInfo* pImageInfo, DWORD& dwOffset)
{
UINT32* pImage32 = (uint32_t*) (pImageInfo->pImageBuffer + sizeof(WOZHeader));
int imageSizeRemaining = pImageInfo->uImageSize - sizeof(WOZHeader);
_ASSERT(imageSizeRemaining >= 0);
if (imageSizeRemaining < 0)
return eMismatch;
while(imageSizeRemaining >= sizeof(WOZChunkHdr))
{
UINT32 chunkId = *pImage32++;
UINT32 chunkSize = *pImage32++;
imageSizeRemaining -= sizeof(WOZChunkHdr);
switch(chunkId)
{
case INFO_CHUNK_ID:
m_pInfo = (InfoChunkv2*)pImage32;
if (m_pInfo->v1.diskType != InfoChunk::diskType5_25)
return eMismatch;
#ifdef _DEBUG
if (m_pInfo->v1.version >= 3)
{
InfoChunkv3* pInfoV3 = (InfoChunkv3*)pImage32;
LogOutput("WOZ: Largest Flux Track = %d\n", pInfoV3->largestFluxTrack);
}
break;
#endif
case TMAP_CHUNK_ID:
pImageInfo->pWOZTrackMap = (BYTE*) pImage32;
break;
case TRKS_CHUNK_ID:
dwOffset = pImageInfo->uOffset = pImageInfo->uImageSize - imageSizeRemaining; // offset into image of track data
break;
case FLUX_CHUNK_ID: // WOZ v3 (todo)
break;
case WRIT_CHUNK_ID: // WOZ v2 (optional)
break;
case META_CHUNK_ID: // (optional)
break;
default: // no idea what this chunk is, so skip it
_ASSERT(0);
break;
}
pImage32 = (UINT32*) ((BYTE*)pImage32 + chunkSize);
imageSizeRemaining -= chunkSize;
_ASSERT(imageSizeRemaining >= 0);
if (imageSizeRemaining < 0)
return eMismatch;
}
return eMatch;
}
//-----------------------------------------------------------------------------
// NB. Of the 6 cases (floppy/harddisk x gzip/zip/normal) only harddisk-normal isn't read entirely to memory
// - harddisk-normal-create also doesn't create a max size image-buffer
// DETERMINE THE FILE'S EXTENSION AND CONVERT IT TO LOWERCASE
void CImageHelperBase::GetCharLowerExt(TCHAR* pszExt, LPCTSTR pszImageFilename, const UINT uExtSize)
{
LPCTSTR pImageFileExt = pszImageFilename;
if (_tcsrchr(pImageFileExt, TEXT(PATH_SEPARATOR)))
pImageFileExt = _tcsrchr(pImageFileExt, TEXT(PATH_SEPARATOR))+1;
if (_tcsrchr(pImageFileExt, TEXT('.')))
pImageFileExt = _tcsrchr(pImageFileExt, TEXT('.'));
_tcsncpy(pszExt, pImageFileExt, uExtSize);
pszExt[uExtSize - 1] = 0;
CharLowerBuff(pszExt, _tcslen(pszExt));
}
void CImageHelperBase::GetCharLowerExt2(TCHAR* pszExt, LPCTSTR pszImageFilename, const UINT uExtSize)
{
TCHAR szFilename[MAX_PATH];
_tcsncpy(szFilename, pszImageFilename, MAX_PATH);
szFilename[MAX_PATH - 1] = 0;
TCHAR* pLastDot = _tcsrchr(szFilename, TEXT('.'));
if (pLastDot)
*pLastDot = 0;
GetCharLowerExt(pszExt, szFilename, uExtSize);
}
//-----------------
ImageError_e CImageHelperBase::CheckGZipFile(LPCTSTR pszImageFilename, ImageInfo* pImageInfo)
{
gzFile hGZFile = gzopen(pszImageFilename, "rb");
if (hGZFile == NULL)
return eIMAGE_ERROR_UNABLE_TO_OPEN_GZ;
// determine uncompressed file length
UINT fileSize = 0;
{
const UINT tempBufferSize = 256 * 1024;
BYTE* tempBuffer = new BYTE[tempBufferSize];
while (int len = gzread(hGZFile, tempBuffer, tempBufferSize))
fileSize += len;
delete[] tempBuffer;
int res = gzrewind(hGZFile);
if (res != 0)
return eIMAGE_ERROR_GZ;
}
if (fileSize == 0 || fileSize > GetMaxImageSize())
return eIMAGE_ERROR_BAD_SIZE;
pImageInfo->pImageBuffer = new BYTE[fileSize];
int nLen = gzread(hGZFile, pImageInfo->pImageBuffer, fileSize);
int nRes = gzclose(hGZFile); // close before returning (due to error) to avoid resource leak
hGZFile = NULL;
if (nLen <= 0)
return eIMAGE_ERROR_BAD_SIZE;
if (nRes != Z_OK)
return eIMAGE_ERROR_GZ;
//
// Strip .gz then try to determine the file's extension and convert it to lowercase
TCHAR szExt[_MAX_EXT] = "";
GetCharLowerExt2(szExt, pszImageFilename, _MAX_EXT);
DWORD dwSize = nLen;
DWORD dwOffset = 0;
CImageBase* pImageType = Detect(pImageInfo->pImageBuffer, dwSize, szExt, dwOffset, pImageInfo);
if (!pImageType)
return eIMAGE_ERROR_UNSUPPORTED;
const eImageType Type = pImageType->GetType();
if (Type == eImageAPL || Type == eImageIIE || Type == eImagePRG)
return eIMAGE_ERROR_UNSUPPORTED;
SetImageInfo(pImageInfo, eFileGZip, dwOffset, pImageType, dwSize);
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
ImageError_e CImageHelperBase::CheckZipFile(LPCTSTR pszImageFilename, ImageInfo* pImageInfo, std::string& strFilenameInZip)
{
unzFile hZipFile = unzOpen(pszImageFilename);
if (hZipFile == NULL)
return eIMAGE_ERROR_UNABLE_TO_OPEN_ZIP;
unz_global_info global_info;
unz_file_info file_info;
char szFilename[MAX_PATH];
memset(szFilename, 0, sizeof(szFilename));
BYTE* pImageBuffer = NULL;
ImageInfo* pImageInfo2 = NULL;
CImageBase* pImageType = NULL;
UINT numValidImages = 0;
try
{
int nRes = unzGetGlobalInfo(hZipFile, &global_info);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
nRes = unzGoToFirstFile(hZipFile);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
for (UINT n=0; n<global_info.number_entry; n++)
{
if (n)
{
nRes = unzGoToNextFile(hZipFile);
if (nRes == UNZ_END_OF_LIST_OF_FILE)
break;
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
}
nRes = unzGetCurrentFileInfo(hZipFile, &file_info, szFilename, MAX_PATH, NULL, 0, NULL, 0);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
const UINT uFileSize = file_info.uncompressed_size;
if (uFileSize > GetMaxImageSize())
throw eIMAGE_ERROR_BAD_SIZE;
if (uFileSize == 0) // skip directories or empty files
continue;
//
nRes = unzOpenCurrentFile(hZipFile);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
BYTE* pImageBuffer = new BYTE[uFileSize];
int nLen = unzReadCurrentFile(hZipFile, pImageBuffer, uFileSize);
if (nLen < 0)
{
unzCloseCurrentFile(hZipFile); // Must CloseCurrentFile before Close
throw eIMAGE_ERROR_UNSUPPORTED;
}
nRes = unzCloseCurrentFile(hZipFile);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
// Determine the file's extension and convert it to lowercase
TCHAR szExt[_MAX_EXT] = "";
GetCharLowerExt(szExt, szFilename, _MAX_EXT);
DWORD dwSize = nLen;
DWORD dwOffset = 0;
ImageInfo*& pImageInfoForDetect = !pImageInfo2 ? pImageInfo : pImageInfo2;
pImageInfoForDetect->pImageBuffer = pImageBuffer;
CImageBase* pNewImageType = Detect(pImageBuffer, dwSize, szExt, dwOffset, pImageInfoForDetect);
if (pNewImageType)
{
numValidImages++;
if (numValidImages == 1)
{
pImageType = pNewImageType;
pImageInfo->szFilenameInZip = szFilename;
memcpy(&pImageInfo->zipFileInfo.tmz_date, &file_info.tmu_date, sizeof(file_info.tmu_date));
pImageInfo->zipFileInfo.dosDate = file_info.dosDate;
pImageInfo->zipFileInfo.internal_fa = file_info.internal_fa;
pImageInfo->zipFileInfo.external_fa = file_info.external_fa;
pImageInfo->uNumEntriesInZip = global_info.number_entry;
pImageInfo->pImageBuffer = pImageBuffer;
pImageBuffer = NULL;
strFilenameInZip = szFilename;
SetImageInfo(pImageInfo, eFileZip, dwOffset, pImageType, dwSize);
pImageInfo2 = new ImageInfo(); // use this dummy one for remaining entries in zip archive, as some members get overwritten during Detect()
}
}
if (pImageInfo->pImageBuffer == pImageBuffer) // on error: avoid double-free when parent calls ImageClose()
pImageInfo->pImageBuffer = NULL;
delete [] pImageBuffer;
pImageBuffer = NULL;
}
}
catch (ImageError_e error)
{
if (hZipFile)
unzClose(hZipFile);
delete [] pImageBuffer;
delete pImageInfo2;
return error;
}
delete pImageInfo2;
int nRes = unzClose(hZipFile);
hZipFile = NULL;
if (nRes != UNZ_OK)
return eIMAGE_ERROR_ZIP;
//
if (!pImageType)
return eIMAGE_ERROR_UNSUPPORTED;
const eImageType Type = pImageType->GetType();
if (Type == eImageAPL || Type == eImageIIE || Type == eImagePRG)
return eIMAGE_ERROR_UNSUPPORTED;
if (global_info.number_entry > 1)
pImageInfo->bWriteProtected = 1; // Zip archives with multiple files are read-only (for now) - see WriteImageData() for zipfile
pImageInfo->uNumValidImagesInZip = numValidImages;
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
ImageError_e CImageHelperBase::CheckNormalFile(LPCTSTR pszImageFilename, ImageInfo* pImageInfo, const bool bCreateIfNecessary)
{
// TRY TO OPEN THE IMAGE FILE
HANDLE& hFile = pImageInfo->hFile;
if (!pImageInfo->bWriteProtected)
{
hFile = CreateFile(pszImageFilename,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ,
(LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
}
// File may have read-only attribute set, so try to open as read-only.
if (hFile == INVALID_HANDLE_VALUE)
{
hFile = CreateFile(
pszImageFilename,
GENERIC_READ,
FILE_SHARE_READ,
(LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL );
if (hFile != INVALID_HANDLE_VALUE)
pImageInfo->bWriteProtected = true;
}
if ((hFile == INVALID_HANDLE_VALUE) && bCreateIfNecessary)
hFile = CreateFile(
pszImageFilename,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ,
(LPSECURITY_ATTRIBUTES)NULL,
CREATE_NEW,
FILE_ATTRIBUTE_NORMAL,
NULL );
// IF WE AREN'T ABLE TO OPEN THE FILE, RETURN
if (hFile == INVALID_HANDLE_VALUE)
return eIMAGE_ERROR_UNABLE_TO_OPEN;
// Determine the file's extension and convert it to lowercase
TCHAR szExt[_MAX_EXT] = "";
GetCharLowerExt(szExt, pszImageFilename, _MAX_EXT);
DWORD dwSize = GetFileSize(hFile, NULL);
DWORD dwOffset = 0;
CImageBase* pImageType = NULL;
if (dwSize > 0)
{
if (dwSize > GetMaxImageSize())
return eIMAGE_ERROR_BAD_SIZE;
bool bTempDetectBuffer;
const UINT uDetectSize = GetMinDetectSize(dwSize, &bTempDetectBuffer);
pImageInfo->pImageBuffer = new BYTE [dwSize];
DWORD dwBytesRead;
BOOL bRes = ReadFile(hFile, pImageInfo->pImageBuffer, dwSize, &dwBytesRead, NULL);
if (!bRes || dwSize != dwBytesRead)
{
delete [] pImageInfo->pImageBuffer;
pImageInfo->pImageBuffer = NULL;
return eIMAGE_ERROR_BAD_SIZE;
}
pImageType = Detect(pImageInfo->pImageBuffer, dwSize, szExt, dwOffset, pImageInfo);
if (bTempDetectBuffer)
{
delete [] pImageInfo->pImageBuffer;
pImageInfo->pImageBuffer = NULL;
}
}
else // Create (or pre-existing zero-length file)
{
if (pImageInfo->bWriteProtected)
return eIMAGE_ERROR_ZEROLENGTH_WRITEPROTECTED; // Can't be formatted, so return error
pImageType = GetImageForCreation(szExt, &dwSize);
if (pImageType && dwSize)
{
if (pImageType->GetType() == eImageWOZ2)
{
pImageInfo->pImageBuffer = m_WOZHelper.CreateEmptyDisk(dwSize);
pImageInfo->uImageSize = dwSize;
bool res = WOZUpdateInfo(pImageInfo, dwOffset);
_ASSERT(res);
}
else
{
pImageInfo->pImageBuffer = new BYTE[dwSize];
if (pImageType->GetType() == eImageNIB1)
{
// Fill zero-length image buffer with alternating high-bit-set nibbles (GH#196, GH#338)
for (UINT i=0; i<dwSize; i+=2)
{
pImageInfo->pImageBuffer[i+0] = 0x80; // bit7 set, but 0x80 is an invalid nibble
pImageInfo->pImageBuffer[i+1] = 0x81; // bit7 set, but 0x81 is an invalid nibble
}
}
else
{
memset(pImageInfo->pImageBuffer, 0, dwSize);
}
}
// As a convenience, resize the file to the complete size (GH#506)
// - this also means that a save-state done mid-way through a format won't reference an image file with a partial size (GH#494)
DWORD dwBytesWritten = 0;
BOOL res = WriteFile(hFile, pImageInfo->pImageBuffer, dwSize, &dwBytesWritten, NULL);
if (!res || dwBytesWritten != dwSize)
return eIMAGE_ERROR_FAILED_TO_INIT_ZEROLENGTH;
}
}
//
if (!pImageType)
{
CloseHandle(hFile);
hFile = INVALID_HANDLE_VALUE;
if (dwSize == 0)
DeleteFile(pszImageFilename);
return eIMAGE_ERROR_UNSUPPORTED;
}
SetImageInfo(pImageInfo, eFileNormal, dwOffset, pImageType, dwSize);
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
void CImageHelperBase::SetImageInfo(ImageInfo* pImageInfo, FileType_e fileType, DWORD dwOffset, CImageBase* pImageType, DWORD dwSize)
{
pImageInfo->FileType = fileType;
pImageInfo->uOffset = dwOffset;
pImageInfo->pImageType = pImageType;
pImageInfo->uImageSize = dwSize;
pImageInfo->uNumTracks = pImageType->m_uNumTracksInImage;// Copy ImageType's m_uNumTracksInImage, which may get trashed by subsequent images in the zip (GH#824)
}
//-------------------------------------
ImageError_e CImageHelperBase::Open( LPCTSTR pszImageFilename,
ImageInfo* pImageInfo,
const bool bCreateIfNecessary,
std::string& strFilenameInZip)
{
pImageInfo->hFile = INVALID_HANDLE_VALUE;
ImageError_e Err;
const size_t uStrLen = strlen(pszImageFilename);
if (uStrLen > GZ_SUFFIX_LEN && _stricmp(pszImageFilename+uStrLen-GZ_SUFFIX_LEN, GZ_SUFFIX) == 0)
{
Err = CheckGZipFile(pszImageFilename, pImageInfo);
}
else if (uStrLen > ZIP_SUFFIX_LEN && _stricmp(pszImageFilename+uStrLen-ZIP_SUFFIX_LEN, ZIP_SUFFIX) == 0)
{
Err = CheckZipFile(pszImageFilename, pImageInfo, strFilenameInZip);
}
else
{
Err = CheckNormalFile(pszImageFilename, pImageInfo, bCreateIfNecessary);
}
if (pImageInfo->pImageType == NULL && Err == eIMAGE_ERROR_NONE)
Err = eIMAGE_ERROR_UNSUPPORTED;
if (Err != eIMAGE_ERROR_NONE)
return Err;
TCHAR szFilename[MAX_PATH] = { 0 };
DWORD uNameLen = GetFullPathName(pszImageFilename, MAX_PATH, szFilename, NULL);
pImageInfo->szFilename = szFilename;
if (uNameLen == 0 || uNameLen >= MAX_PATH)
Err = eIMAGE_ERROR_FAILED_TO_GET_PATHNAME;
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
void CImageHelperBase::Close(ImageInfo* pImageInfo)
{
if (pImageInfo->hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(pImageInfo->hFile);
pImageInfo->hFile = INVALID_HANDLE_VALUE;
}
pImageInfo->szFilename.clear();
delete [] pImageInfo->pImageBuffer;
pImageInfo->pImageBuffer = NULL;
}
//-------------------------------------
bool CImageHelperBase::WOZUpdateInfo(ImageInfo* pImageInfo, DWORD& dwOffset)
{
if (m_WOZHelper.ProcessChunks(pImageInfo, dwOffset) != eMatch)
{
_ASSERT(0);
return false;
}
if (m_WOZHelper.IsWriteProtected())
pImageInfo->bWriteProtected = true;
pImageInfo->optimalBitTiming = m_WOZHelper.GetOptimalBitTiming();
pImageInfo->maxNibblesPerTrack = m_WOZHelper.GetMaxNibblesPerTrack();
pImageInfo->bootSectorFormat = m_WOZHelper.GetBootSectorFormat();
m_WOZHelper.InvalidateInfo();
return true;
}
//-----------------------------------------------------------------------------
CDiskImageHelper::CDiskImageHelper(void) :
CImageHelperBase(true)
{
m_vecImageTypes.push_back( new CWOZ1Image ); // Try to match WOZ1/WOZ2 first, as these can be precisely matched
m_vecImageTypes.push_back( new CWOZ2Image );
m_vecImageTypes.push_back( new CDoImage );
m_vecImageTypes.push_back( new CPoImage );
m_vecImageTypes.push_back( new CNib1Image );
m_vecImageTypes.push_back( new CNib2Image );
m_vecImageTypes.push_back( new CHDVImage ); // Used to trap inserting a small .hdv (or a non-140K .2mg) into a floppy drive! Small means <GetMaxFloppyImageSize()
m_vecImageTypes.push_back( new CIIeImage );
m_vecImageTypes.push_back( new CAplImage );
m_vecImageTypes.push_back( new CPrgImage );
}
CImageBase* CDiskImageHelper::Detect(LPBYTE pImage, DWORD dwSize, const TCHAR* pszExt, DWORD& dwOffset, ImageInfo* pImageInfo)
{
dwOffset = 0;
m_MacBinaryHelper.DetectHdr(pImage, dwSize, dwOffset);
m_Result2IMG = m_2IMGHelper.DetectHdr(pImage, dwSize, dwOffset);
pImageInfo->maxNibblesPerTrack = NIBBLES_PER_TRACK; // Start with the default size (for all types). May get changed below.
// CALL THE DETECTION FUNCTIONS IN ORDER, LOOKING FOR A MATCH
eImageType imageType = eImageUNKNOWN;
eImageType possibleType = eImageUNKNOWN;
if (m_Result2IMG == eMatch)
{
if (m_2IMGHelper.IsImageFormatDOS33())
imageType = eImageDO;
else if (m_2IMGHelper.IsImageFormatProDOS())
imageType = eImagePO;
if (imageType != eImageUNKNOWN)
{
CImageBase* pImageType = GetImage(imageType);
if (!pImageType || !pImageType->IsValidImageSize(dwSize))
imageType = eImageUNKNOWN;
}
}
if (imageType == eImageUNKNOWN)
{
for (UINT uLoop=0; uLoop < GetNumImages() && imageType == eImageUNKNOWN; uLoop++)
{
if (*pszExt && _tcsstr(GetImage(uLoop)->GetRejectExtensions(), pszExt))
continue;
eDetectResult Result = GetImage(uLoop)->Detect(pImage, dwSize, pszExt);
if (Result == eMatch)
imageType = GetImage(uLoop)->GetType();
else if ((Result == ePossibleMatch) && (possibleType == eImageUNKNOWN))
possibleType = GetImage(uLoop)->GetType();
}
}
if (imageType == eImageUNKNOWN)
imageType = possibleType;
CImageBase* pImageType = GetImage(imageType);
if (!pImageType)
return NULL;
if (imageType == eImageWOZ1 || imageType == eImageWOZ2)
{
CWOZHelper::WOZHeader* pWozHdr = (CWOZHelper::WOZHeader*) pImage;
if (pWozHdr->crc32 && // WOZ spec: CRC of 0 should be ignored
pWozHdr->crc32 != crc32(0, pImage+sizeof(CWOZHelper::WOZHeader), dwSize-sizeof(CWOZHelper::WOZHeader)))
{
int res = GetFrame().FrameMessageBox("CRC mismatch\nContinue using image?", "AppleWin: WOZ Header", MB_ICONSTOP | MB_SETFOREGROUND | MB_YESNO);
if (res == IDNO)
return NULL;
}
pImageInfo->uImageSize = dwSize;
if (!WOZUpdateInfo(pImageInfo, dwOffset))
return NULL;
}
else
{
if (pImageType->AllowRW())
{
const UINT uNumTracksInImage = GetNumTracksInImage(pImageType);
_ASSERT(uNumTracksInImage); // Should've been set by Image's Detect()
if (uNumTracksInImage == 0)
SetNumTracksInImage(pImageType, (dwSize > 0) ? TRACKS_STANDARD : 0); // Assume default # tracks
}
if (m_Result2IMG == eMatch)
{
pImageType->SetVolumeNumber( m_2IMGHelper.GetVolumeNumber() );
if (m_2IMGHelper.IsLocked())
pImageInfo->bWriteProtected = true;
}
else
{
pImageType->SetVolumeNumber(DEFAULT_VOLUME_NUMBER);
}
}
return pImageType;
}
CImageBase* CDiskImageHelper::GetImageForCreation(const TCHAR* pszExt, DWORD* pCreateImageSize)
{
// WE CREATE ONLY DOS ORDER (DO), 6656-NIBBLE (NIB) OR WOZ2 (WOZ) FORMAT FILES
for (UINT uLoop = 0; uLoop < GetNumImages(); uLoop++)
{
if (!GetImage(uLoop)->AllowCreate())
continue;
if (*pszExt && _tcsstr(GetImage(uLoop)->GetCreateExtensions(), pszExt))
{
CImageBase* pImageType = GetImage(uLoop);
*pCreateImageSize = pImageType->GetImageSizeForCreate(); // Also sets m_uNumTracksInImage
if (*pCreateImageSize == (UINT)-1)
return NULL;
return pImageType;
}
}
return NULL;
}
UINT CDiskImageHelper::GetMaxImageSize(void)
{
// Pathologic largest 5.25 image is a WOZ with FLUX tracks for each 0.25 track (GH#1240)
const UINT largestFluxTrackInBlocks = 100; // typically this is 70-80 blocks
const UINT maxTracks = 35 * 4; // typically only ~10-20 FLUX tracks (the rest TRKS tracks)
const UINT bytesPerBlock = 512;
return largestFluxTrackInBlocks * maxTracks * bytesPerBlock; // ~7MB
}
UINT CDiskImageHelper::GetMinDetectSize(const UINT uImageSize, bool* pTempDetectBuffer)
{
*pTempDetectBuffer = false;
return uImageSize;
}
//-----------------------------------------------------------------------------
CHardDiskImageHelper::CHardDiskImageHelper(void) :
CImageHelperBase(false)
{
m_vecImageTypes.push_back( new CHDVImage );
}
CImageBase* CHardDiskImageHelper::Detect(LPBYTE pImage, DWORD dwSize, const TCHAR* pszExt, DWORD& dwOffset, ImageInfo* pImageInfo)
{
dwOffset = 0;
m_Result2IMG = m_2IMGHelper.DetectHdr(pImage, dwSize, dwOffset);
eImageType ImageType = eImageUNKNOWN;
for (UINT uLoop=0; uLoop < GetNumImages() && ImageType == eImageUNKNOWN; uLoop++)
{
if (*pszExt && _tcsstr(GetImage(uLoop)->GetRejectExtensions(), pszExt))
continue;
eDetectResult Result = GetImage(uLoop)->Detect(pImage, dwSize, pszExt);
if (Result == eMatch)
ImageType = GetImage(uLoop)->GetType();
_ASSERT(Result != ePossibleMatch);
}
CImageBase* pImageType = GetImage(ImageType);
if (pImageType)
{
if (m_Result2IMG == eMatch)
{
if (m_2IMGHelper.IsLocked())
pImageInfo->bWriteProtected = true;
}
}
pImageInfo->pWOZTrackMap = 0; // TODO: WOZ
pImageInfo->optimalBitTiming = 0; // TODO: WOZ
pImageInfo->maxNibblesPerTrack = 0; // TODO
return pImageType;
}
CImageBase* CHardDiskImageHelper::GetImageForCreation(const TCHAR* pszExt, DWORD* pCreateImageSize)
{
// NB. Not supported for HardDisks
// - Would need to create a default 16-block file like CiderPress
for (UINT uLoop = 0; uLoop < GetNumImages(); uLoop++)
{
if (!GetImage(uLoop)->AllowCreate())
continue;
if (*pszExt && _tcsstr(GetImage(uLoop)->GetCreateExtensions(), pszExt))
{
CImageBase* pImageType = GetImage(uLoop);
*pCreateImageSize = pImageType->GetImageSizeForCreate();
if (*pCreateImageSize == (UINT)-1)
return NULL;
return pImageType;
}
}
return NULL;
}
UINT CHardDiskImageHelper::GetMaxImageSize(void)
{
// TODO: This doesn't account for .2mg files with comments after the disk-image
return HARDDISK_32M_SIZE + m_2IMGHelper.GetMaxHdrSize();
}
UINT CHardDiskImageHelper::GetMinDetectSize(const UINT uImageSize, bool* pTempDetectBuffer)
{
*pTempDetectBuffer = true;
return m_2IMGHelper.GetMaxHdrSize();
}
//-----------------------------------------------------------------------------
#define ASSERT_OFFSET(x, offset) _ASSERT( ((BYTE*)&pWOZ->x - (BYTE*)pWOZ) == offset )
BYTE* CWOZHelper::CreateEmptyDisk(DWORD& size)
{
WOZEmptyImage525* pWOZ = new WOZEmptyImage525;
memset(pWOZ, 0, sizeof(WOZEmptyImage525));
size = sizeof(WOZEmptyImage525);
_ASSERT(size == 3*BLOCK_SIZE);
pWOZ->hdr.id1 = ID1_WOZ2;
pWOZ->hdr.id2 = ID2;
// hdr.crc32 done at end
// INFO
ASSERT_OFFSET(infoHdr, 12);
pWOZ->infoHdr.id = INFO_CHUNK_ID;
pWOZ->infoHdr.size = (BYTE*)&pWOZ->tmapHdr - (BYTE*)&pWOZ->info;
_ASSERT(pWOZ->infoHdr.size == INFO_CHUNK_SIZE);
pWOZ->info.v1.version = 2;
pWOZ->info.v1.diskType = InfoChunk::diskType5_25;
pWOZ->info.v1.cleaned = 1;
std::string creator = "AppleWin v" + g_VERSIONSTRING;
memset(&pWOZ->info.v1.creator[0], ' ', sizeof(pWOZ->info.v1.creator));
memcpy(&pWOZ->info.v1.creator[0], creator.c_str(), creator.size()); // don't include null
pWOZ->info.diskSides = 1;
pWOZ->info.bootSectorFormat = bootUnknown; // could be INIT'd to 13 or 16 sector
pWOZ->info.optimalBitTiming = InfoChunkv2::optimalBitTiming5_25;
pWOZ->info.compatibleHardware = 0; // unknown
pWOZ->info.requiredRAM = 0; // unknown
pWOZ->info.largestTrack = TRK_DEFAULT_BLOCK_COUNT_5_25; // unknown - but use default
// TMAP
ASSERT_OFFSET(tmapHdr, 80);
pWOZ->tmapHdr.id = TMAP_CHUNK_ID;
pWOZ->tmapHdr.size = sizeof(pWOZ->tmap);
memset(&pWOZ->tmap, TMAP_TRACK_EMPTY, sizeof(pWOZ->tmap)); // all tracks empty
// TRKS
ASSERT_OFFSET(trksHdr, 248);
pWOZ->trksHdr.id = TRKS_CHUNK_ID;
pWOZ->trksHdr.size = sizeof(pWOZ->trks);
for (UINT i = 0; i < sizeof(pWOZ->trks.trks) / sizeof(pWOZ->trks.trks[0]); i++)
{
pWOZ->trks.trks[i].startBlock = 0; // minimum startBlock (at end of file!)
pWOZ->trks.trks[i].blockCount = 0;
pWOZ->trks.trks[i].bitCount = 0;
}
pWOZ->hdr.crc32 = crc32(0, (BYTE*)&pWOZ->infoHdr, sizeof(WOZEmptyImage525) - sizeof(WOZHeader));
return (BYTE*) pWOZ;
}
#if _DEBUG
// Replace the call in CheckNormalFile() to CreateEmptyDiskv1() to generate a WOZv1 empty image-file
BYTE* CWOZHelper::CreateEmptyDiskv1(DWORD& size)
{
WOZv1EmptyImage525* pWOZ = new WOZv1EmptyImage525;
memset(pWOZ, 0, sizeof(WOZv1EmptyImage525));
size = sizeof(WOZv1EmptyImage525);
_ASSERT(size == 256);
pWOZ->hdr.id1 = ID1_WOZ1;
pWOZ->hdr.id2 = ID2;
// hdr.crc32 done at end
// INFO
ASSERT_OFFSET(infoHdr, 12);
pWOZ->infoHdr.id = INFO_CHUNK_ID;
pWOZ->infoHdr.size = (BYTE*)&pWOZ->tmapHdr - (BYTE*)&pWOZ->info;
_ASSERT(pWOZ->infoHdr.size == INFO_CHUNK_SIZE);
pWOZ->info.version = 1;
pWOZ->info.diskType = InfoChunk::diskType5_25;
pWOZ->info.cleaned = 1;
std::string creator = "AppleWin v" + g_VERSIONSTRING;
memset(&pWOZ->info.creator[0], ' ', sizeof(pWOZ->info.creator));
memcpy(&pWOZ->info.creator[0], creator.c_str(), creator.size()); // don't include null
// TMAP
ASSERT_OFFSET(tmapHdr, 80);
pWOZ->tmapHdr.id = TMAP_CHUNK_ID;
pWOZ->tmapHdr.size = sizeof(pWOZ->tmap);
memset(&pWOZ->tmap, TMAP_TRACK_EMPTY, sizeof(pWOZ->tmap)); // all tracks empty
// TRKS
ASSERT_OFFSET(trksHdr, 248);
pWOZ->trksHdr.id = TRKS_CHUNK_ID;
pWOZ->trksHdr.size = 0;
pWOZ->hdr.crc32 = crc32(0, (BYTE*)&pWOZ->infoHdr, sizeof(WOZv1EmptyImage525) - sizeof(WOZHeader));
return (BYTE*) pWOZ;
}
#endif
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