/* 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 "Disk.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<= 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) { ReadTrack(pImageInfo, nTrack, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE); *pNibbles = NibblizeTrack(pTrackImageBuffer, eDOSOrder, nTrack); if (!Disk_GetEnhanceDisk()) 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) { ReadTrack(pImageInfo, nTrack, ms_pWorkBuffer, TRACK_DENIBBLIZED_SIZE); *pNibbles = NibblizeTrack(pTrackImageBuffer, eProDOSOrder, nTrack); if (!Disk_GetEnhanceDisk()) 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) { 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) { 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) { // 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; int nRes = unzGetGlobalInfo(hZipFile, &global_info); if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; nRes = unzGoToFirstFile(hZipFile); // Only support 1st file in zip archive for now if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; unz_file_info file_info; char szFilename[MAX_PATH]; memset(szFilename, 0, sizeof(szFilename)); nRes = unzGetCurrentFileInfo(hZipFile, &file_info, szFilename, MAX_PATH, NULL, 0, NULL, 0); if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; const UINT uFileSize = file_info.uncompressed_size; if (uFileSize > GetMaxImageSize()) return eIMAGE_ERROR_BAD_SIZE; pImageInfo->pImageBuffer = new BYTE[uFileSize]; nRes = unzOpenCurrentFile(hZipFile); if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; int nLen = unzReadCurrentFile(hZipFile, pImageInfo->pImageBuffer, uFileSize); if (nLen < 0) { unzCloseCurrentFile(hZipFile); // Must CloseCurrentFile before Close return eIMAGE_ERROR_UNSUPPORTED; } nRes = unzCloseCurrentFile(hZipFile); if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; nRes = unzClose(hZipFile); hZipFile = NULL; if (nRes != UNZ_OK) return eIMAGE_ERROR_ZIP; strncpy(pImageInfo->szFilenameInZip, szFilename, MAX_PATH); 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; ipImageBuffer[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 && strcmp(pszImageFilename+uStrLen-GZ_SUFFIX_LEN, GZ_SUFFIX) == 0) { Err = CheckGZipFile(pszImageFilename, pImageInfo); } else if (uStrLen > ZIP_SUFFIX_LEN && strcmp(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 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(); }