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AppleWin/source/DiskImageHelper.cpp
tomcw 971eff7875 Added info about enhanceDisk
2019-04-11 22:34:40 +01:00

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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 "Common.h"
#include "zlib.h"
#include "unzip.h"
#include "CPU.h"
#include "DiskImage.h"
#include "DiskImageHelper.h"
#include "Memory.h"
/* 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}
};
LPBYTE CImageBase::ms_pWorkBuffer = NULL;
//-----------------------------------------------------------------------------
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);
if (pImageInfo->FileType == eFileNormal)
{
if (pImageInfo->hFile == INVALID_HANDLE_VALUE)
return false;
SetFilePointer(pImageInfo->hFile, Offset, NULL, FILE_BEGIN);
DWORD dwBytesWritten;
BOOL bRes = WriteFile(pImageInfo->hFile, pTrackBuffer, uTrackSize, &dwBytesWritten, NULL);
_ASSERT(dwBytesWritten == uTrackSize);
if (!bRes || dwBytesWritten != uTrackSize)
return false;
}
else if (pImageInfo->FileType == eFileGZip)
{
// Write entire compressed image each time (dirty track change or dirty disk removal)
gzFile hGZFile = gzopen(pImageInfo->szFilename, "wb");
if (hGZFile == NULL)
return false;
int nLen = gzwrite(hGZFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
if (nLen != pImageInfo->uImageSize)
return false;
int nRes = gzclose(hGZFile);
hGZFile = NULL;
if (nRes != Z_OK)
return false;
}
else if (pImageInfo->FileType == eFileZip)
{
// Write entire compressed image each time (dirty track change or dirty disk removal)
// NB. Only support Zip archives with a single file
zipFile hZipFile = zipOpen(pImageInfo->szFilename, APPEND_STATUS_CREATE);
if (hZipFile == NULL)
return false;
int nRes = zipOpenNewFileInZip(hZipFile, pImageInfo->szFilenameInZip, &pImageInfo->zipFileInfo, NULL, 0, NULL, 0, NULL, Z_DEFLATED, Z_BEST_SPEED);
if (nRes != ZIP_OK)
return false;
nRes = zipWriteInFileInZip(hZipFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
if (nRes != ZIP_OK)
return false;
nRes = zipCloseFileInZip(hZipFile);
if (nRes != ZIP_OK)
return false;
nRes = zipClose(hZipFile, NULL);
if (nRes != ZIP_OK)
return false;
}
else
{
_ASSERT(0);
return false;
}
return true;
}
//-----------------------------------------------------------------------------
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 (pImageInfo->FileType == eFileNormal)
{
if (pImageInfo->hFile == INVALID_HANDLE_VALUE)
return false;
SetFilePointer(pImageInfo->hFile, Offset, NULL, FILE_BEGIN);
DWORD dwBytesWritten;
BOOL bRes = WriteFile(pImageInfo->hFile, pBlockBuffer, HD_BLOCK_SIZE, &dwBytesWritten, NULL);
if (!bRes || dwBytesWritten != HD_BLOCK_SIZE)
return false;
if (bGrowImageBuffer)
pImageInfo->uImageSize += HD_BLOCK_SIZE;
}
else if (pImageInfo->FileType == eFileGZip)
{
// Write entire compressed image each time a block is written
gzFile hGZFile = gzopen(pImageInfo->szFilename, "wb");
if (hGZFile == NULL)
return false;
int nLen = gzwrite(hGZFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
if (nLen != pImageInfo->uImageSize)
return false;
int nRes = gzclose(hGZFile);
hGZFile = NULL;
if (nRes != Z_OK)
return false;
}
else if (pImageInfo->FileType == eFileZip)
{
// Write entire compressed image each time a block is written
// NB. Only support Zip archives with a single file
zipFile hZipFile = zipOpen(pImageInfo->szFilename, APPEND_STATUS_CREATE);
if (hZipFile == NULL)
return false;
int nRes = zipOpenNewFileInZip(hZipFile, pImageInfo->szFilenameInZip, &pImageInfo->zipFileInfo, NULL, 0, NULL, 0, NULL, Z_DEFLATED, Z_BEST_SPEED);
if (nRes != ZIP_OK)
return false;
nRes = zipWriteInFileInZip(hZipFile, pImageInfo->pImageBuffer, pImageInfo->uImageSize);
if (nRes != ZIP_OK)
return false;
nRes = zipCloseFileInZip(hZipFile);
if (nRes != ZIP_OK)
return false;
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 = ms_pWorkBuffer+(sector << 8);
LPBYTE resultptr = ms_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 = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE resultptr = ms_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 = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
LPBYTE resultptr = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
int loop = 343;
while (loop--)
*(resultptr++) = ms_DiskByte[(*(sourceptr++)) >> 2];
}
return ms_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)
{
ZeroMemory(sixbitbyte,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 = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE resultptr = ms_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 = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+0x400;
LPBYTE resultptr = ms_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 = ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE;
LPBYTE sectorbase = ms_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)
{
ZeroMemory(ms_pWorkBuffer, 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()
{
*(ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+loop++) = *(trackimage+tempoffset++);
if (tempoffset >= nibbles)
tempoffset = 0;
}
if (byteval[2] == 0x96)
{
sector = ((*(ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE+4) & 0x55) << 1)
| (*(ms_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(ms_pWorkBuffer+(ms_SectorNumber[SectorOrder][sector] << 8));
}
sector = 0;
}
}
}
}
//-------------------------------------
DWORD CImageBase::NibblizeTrack(LPBYTE trackimagebuffer, SectorOrder_e SectorOrder, int track)
{
ZeroMemory(ms_pWorkBuffer+TRACK_DENIBBLIZED_SIZE, 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;
CopyMemory(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;
CopyMemory(ms_pWorkBuffer, pTrackImageBuffer, nNumNibbles);
CopyMemory(pTrackImageBuffer, ms_pWorkBuffer+nSkewBytes, nNumNibbles-nSkewBytes);
CopyMemory(pTrackImageBuffer+nNumNibbles-nSkewBytes, ms_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, int nTrack, int nQuarterTrack, LPBYTE pTrackImageBuffer, int* pNibbles, bool enhanceDisk)
{
ReadTrack(pImageInfo, nTrack, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eDOSOrder, nTrack);
if (!enhanceDisk)
SkewTrack(nTrack, *pNibbles, pTrackImageBuffer);
}
virtual void Write(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImage, int nNibbles)
{
DenibblizeTrack(pTrackImage, eDOSOrder, nNibbles);
WriteTrack(pImageInfo, nTrack, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
}
virtual bool AllowCreate(void) { return true; }
virtual UINT GetImageSizeForCreate(void) { 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, int nTrack, int nQuarterTrack, LPBYTE pTrackImageBuffer, int* pNibbles, bool enhanceDisk)
{
ReadTrack(pImageInfo, nTrack, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eProDOSOrder, nTrack);
if (!enhanceDisk)
SkewTrack(nTrack, *pNibbles, pTrackImageBuffer);
}
virtual void Write(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImage, int nNibbles)
{
DenibblizeTrack(pTrackImage, eProDOSOrder, nNibbles);
WriteTrack(pImageInfo, nTrack, ms_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"; }
};
//-------------------------------------
// 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;
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;
return eMatch;
}
virtual void Read(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImageBuffer, int* pNibbles, bool enhanceDisk)
{
ReadTrack(pImageInfo, nTrack, pTrackImageBuffer, NIB1_TRACK_SIZE);
*pNibbles = NIB1_TRACK_SIZE;
}
virtual void Write(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImage, int nNibbles)
{
_ASSERT(nNibbles == NIB1_TRACK_SIZE); // Must be true - as nNibbles gets init'd by ImageReadTrace()
WriteTrack(pImageInfo, nTrack, pTrackImage, nNibbles);
}
virtual bool AllowCreate(void) { return true; }
virtual UINT GetImageSizeForCreate(void) { 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"; }
};
//-------------------------------------
// 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, int nTrack, int nQuarterTrack, LPBYTE pTrackImageBuffer, int* pNibbles, bool enhanceDisk)
{
ReadTrack(pImageInfo, nTrack, pTrackImageBuffer, NIB2_TRACK_SIZE);
*pNibbles = NIB2_TRACK_SIZE;
}
virtual void Write(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImage, int nNibbles)
{
_ASSERT(nNibbles == NIB2_TRACK_SIZE); // Must be true - as nNibbles gets init'd by ImageReadTrace()
WriteTrack(pImageInfo, nTrack, pTrackImage, nNibbles);
}
virtual eImageType GetType(void) { return eImageNIB2; }
virtual const char* GetCreateExtensions(void) { return ".nb2"; }
virtual const char* GetRejectExtensions(void) { return ".do;.iie;.po;.prg;.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, int nTrack, int nQuarterTrack, LPBYTE pTrackImageBuffer, int* pNibbles, bool enhanceDisk)
{
// IF WE HAVEN'T ALREADY DONE SO, READ THE IMAGE FILE HEADER
if (!m_pHeader)
{
m_pHeader = (LPBYTE) VirtualAlloc(NULL, 88, MEM_COMMIT, PAGE_READWRITE);
if (!m_pHeader)
{
*pNibbles = 0;
return;
}
ZeroMemory(m_pHeader, 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, nTrack*TRACK_DENIBBLIZED_SIZE+30, NULL, FILE_BEGIN);
ZeroMemory(ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE);
DWORD bytesread;
ReadFile(pImageInfo->hFile, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE, &bytesread, NULL);
*pNibbles = NibblizeTrack(pTrackImageBuffer, eSIMSYSTEMOrder, nTrack);
}
// OTHERWISE, IF THIS IMAGE CONTAINS NIBBLE INFORMATION, READ IT DIRECTLY INTO THE TRACK BUFFER
else
{
*pNibbles = *(LPWORD)(m_pHeader+nTrack*2+14);
LONG Offset = 88;
while (nTrack--)
Offset += *(LPWORD)(m_pHeader+nTrack*2+14);
SetFilePointer(pImageInfo->hFile, Offset, NULL,FILE_BEGIN);
ZeroMemory(pTrackImageBuffer, *pNibbles);
DWORD dwBytesRead;
ReadFile(pImageInfo->hFile, pTrackImageBuffer, *pNibbles, &dwBytesRead, NULL);
}
}
virtual void Write(ImageInfo* pImageInfo, int nTrack, int nQuarterTrack, LPBYTE pTrackImage, 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;.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;.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;.2mg;.2img"; }
};
//-----------------------------------------------------------------------------
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)
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;
}
//-----------------------------------------------------------------------------
// 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 GetCharLowerExt(TCHAR* pszExt, LPCTSTR pszImageFilename, const UINT uExtSize)
{
LPCTSTR pImageFileExt = pszImageFilename;
if (_tcsrchr(pImageFileExt, TEXT('\\')))
pImageFileExt = _tcsrchr(pImageFileExt, TEXT('\\'))+1;
if (_tcsrchr(pImageFileExt, TEXT('.')))
pImageFileExt = _tcsrchr(pImageFileExt, TEXT('.'));
_tcsncpy(pszExt, pImageFileExt, uExtSize);
pszExt[uExtSize - 1] = 0;
CharLowerBuff(pszExt, _tcslen(pszExt));
}
void 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;
const UINT MAX_UNCOMPRESSED_SIZE = GetMaxImageSize() + 1; // +1 to detect images that are too big
pImageInfo->pImageBuffer = new BYTE[MAX_UNCOMPRESSED_SIZE];
int nLen = gzread(hGZFile, pImageInfo->pImageBuffer, MAX_UNCOMPRESSED_SIZE);
if (nLen < 0 || nLen == MAX_UNCOMPRESSED_SIZE)
return eIMAGE_ERROR_BAD_SIZE;
int nRes = gzclose(hGZFile);
hGZFile = NULL;
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->bWriteProtected);
if (!pImageType)
return eIMAGE_ERROR_UNSUPPORTED;
const eImageType Type = pImageType->GetType();
if (Type == eImageAPL || Type == eImageIIE || Type == eImagePRG)
return eIMAGE_ERROR_UNSUPPORTED;
pImageInfo->FileType = eFileGZip;
pImageInfo->uOffset = dwOffset;
pImageInfo->pImageType = pImageType;
pImageInfo->uImageSize = 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));
int nRes = 0, nLen = 0;
try
{
nRes = unzGetGlobalInfo(hZipFile, &global_info);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
nRes = unzGoToFirstFile(hZipFile); // Only support 1st file in zip archive for now
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;
pImageInfo->pImageBuffer = new BYTE[uFileSize];
nRes = unzOpenCurrentFile(hZipFile);
if (nRes != UNZ_OK)
throw eIMAGE_ERROR_ZIP;
nLen = unzReadCurrentFile(hZipFile, pImageInfo->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;
}
catch (ImageError_e error)
{
if (hZipFile)
unzClose(hZipFile);
return error;
}
nRes = unzClose(hZipFile);
hZipFile = NULL;
if (nRes != UNZ_OK)
return eIMAGE_ERROR_ZIP;
strncpy(pImageInfo->szFilenameInZip, szFilename, MAX_PATH);
pImageInfo->szFilenameInZip[MAX_PATH-1] = 0;
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;
strFilenameInZip = szFilename;
//
// 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;
CImageBase* pImageType = Detect(pImageInfo->pImageBuffer, dwSize, szExt, dwOffset, &pImageInfo->bWriteProtected);
if (!pImageType)
{
if (global_info.number_entry > 1)
return eIMAGE_ERROR_UNSUPPORTED_MULTI_ZIP;
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)
pImageInfo->FileType = eFileZip;
pImageInfo->uOffset = dwOffset;
pImageInfo->pImageType = pImageType;
pImageInfo->uImageSize = dwSize;
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->bWriteProtected);
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)
{
pImageInfo->pImageBuffer = new BYTE [dwSize];
if (pImageType->GetType() != eImageNIB1)
{
ZeroMemory(pImageInfo->pImageBuffer, dwSize);
}
else
{
// 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
}
}
// 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;
}
pImageInfo->FileType = eFileNormal;
pImageInfo->uOffset = dwOffset;
pImageInfo->pImageType = pImageType;
pImageInfo->uImageSize = dwSize;
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
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;
DWORD uNameLen = GetFullPathName(pszImageFilename, MAX_PATH, pImageInfo->szFilename, NULL);
if (uNameLen == 0 || uNameLen >= MAX_PATH)
Err = eIMAGE_ERROR_FAILED_TO_GET_PATHNAME;
return eIMAGE_ERROR_NONE;
}
//-------------------------------------
void CImageHelperBase::Close(ImageInfo* pImageInfo, const bool bDeleteFile)
{
if (pImageInfo->hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(pImageInfo->hFile);
pImageInfo->hFile = INVALID_HANDLE_VALUE;
}
if (bDeleteFile)
{
DeleteFile(pImageInfo->szFilename);
}
pImageInfo->szFilename[0] = 0;
delete [] pImageInfo->pImageBuffer;
pImageInfo->pImageBuffer = NULL;
}
//-----------------------------------------------------------------------------
CDiskImageHelper::CDiskImageHelper(void) :
CImageHelperBase(true)
{
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, bool* pWriteProtected_)
{
dwOffset = 0;
m_MacBinaryHelper.DetectHdr(pImage, dwSize, dwOffset);
m_Result2IMG = m_2IMGHelper.DetectHdr(pImage, dwSize, dwOffset);
// 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)
{
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() && !*pWriteProtected_)
*pWriteProtected_ = 1;
}
else
{
pImageType->SetVolumeNumber(DEFAULT_VOLUME_NUMBER);
}
}
return pImageType;
}
CImageBase* CDiskImageHelper::GetImageForCreation(const TCHAR* pszExt, DWORD* pCreateImageSize)
{
// WE CREATE ONLY DOS ORDER (DO) OR 6656-NIBBLE (NIB) 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);
SetNumTracksInImage(pImageType, TRACKS_STANDARD); // Assume default # tracks
*pCreateImageSize = pImageType->GetImageSizeForCreate();
if (*pCreateImageSize == (UINT)-1)
return NULL;
return pImageType;
}
}
return NULL;
}
UINT CDiskImageHelper::GetMaxImageSize(void)
{
// TODO: This doesn't account for .2mg files with comments after the disk-image
return UNIDISK35_800K_SIZE + m_MacBinaryHelper.GetMaxHdrSize() + m_2IMGHelper.GetMaxHdrSize();
}
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, bool* pWriteProtected_)
{
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() && !*pWriteProtected_)
*pWriteProtected_ = 1;
}
}
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();
}
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