mirror of
https://github.com/AppleWin/AppleWin.git
synced 2024-08-18 20:29:01 +00:00
205 lines
5.6 KiB
C++
205 lines
5.6 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006-2010, Tom Charlesworth, Michael Pohoreski
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AppleWin is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AppleWin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Description: Disk Image
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*
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* Author: Various
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*/
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#include "StdAfx.h"
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#include "Structs.h"
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#include "Common.h"
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#include "DiskImage.h"
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#include "DiskImageHelper.h"
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static CDiskImageHelper sg_DiskImageHelper;
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//===========================================================================
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// Pre: *pWriteProtected_ already set to file's r/w status - see DiskInsert()
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ImageError_e ImageOpen( LPCTSTR pszImageFilename,
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HIMAGE* hDiskImage_,
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bool* pWriteProtected_,
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const bool bCreateIfNecessary,
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std::string& strFilenameInZip)
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{
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if (! (pszImageFilename && hDiskImage_ && pWriteProtected_ && sg_DiskImageHelper.GetWorkBuffer()))
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return eIMAGE_ERROR_BAD_POINTER;
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// CREATE A RECORD FOR THE FILE, AND RETURN AN IMAGE HANDLE
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*hDiskImage_ = (HIMAGE) VirtualAlloc(NULL, sizeof(ImageInfo), MEM_COMMIT, PAGE_READWRITE);
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if (*hDiskImage_ == NULL)
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return eIMAGE_ERROR_BAD_POINTER;
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ZeroMemory(*hDiskImage_, sizeof(ImageInfo));
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ImageInfo* pImageInfo = (ImageInfo*) *hDiskImage_;
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pImageInfo->bWriteProtected = *pWriteProtected_;
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ImageError_e Err = sg_DiskImageHelper.Open(pszImageFilename, pImageInfo, bCreateIfNecessary, strFilenameInZip);
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if (pImageInfo->pImageType != NULL && Err == eIMAGE_ERROR_NONE && pImageInfo->pImageType->GetType() == eImageHDV)
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Err = eIMAGE_ERROR_UNSUPPORTED_HDV;
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if (Err != eIMAGE_ERROR_NONE)
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{
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ImageClose(*hDiskImage_, true);
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*hDiskImage_ = (HIMAGE)0;
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return Err;
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}
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// THE FILE MATCHES A KNOWN FORMAT
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pImageInfo->uNumTracks = sg_DiskImageHelper.GetNumTracksInImage(pImageInfo->pImageType);
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for (UINT uTrack = 0; uTrack < pImageInfo->uNumTracks; uTrack++)
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pImageInfo->ValidTrack[uTrack] = (pImageInfo->uImageSize > 0) ? 1 : 0;
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*pWriteProtected_ = pImageInfo->bWriteProtected;
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return eIMAGE_ERROR_NONE;
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}
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//===========================================================================
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void ImageClose(const HIMAGE hDiskImage, const bool bOpenError /*=false*/)
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{
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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bool bDeleteFile = false;
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if (!bOpenError)
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{
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for (UINT uTrack = 0; uTrack < ptr->uNumTracks; uTrack++)
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{
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if (!ptr->ValidTrack[uTrack])
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{
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// TODO: Comment using info from this URL:
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// http://groups.google.de/group/comp.emulators.apple2/msg/7a1b9317e7905152
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bDeleteFile = true;
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break;
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}
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}
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}
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sg_DiskImageHelper.Close(ptr, bDeleteFile);
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VirtualFree(ptr, 0, MEM_RELEASE);
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}
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//===========================================================================
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BOOL ImageBoot(const HIMAGE hDiskImage)
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{
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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BOOL result = 0;
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if (ptr->pImageType->AllowBoot())
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result = ptr->pImageType->Boot(ptr);
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if (result)
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ptr->bWriteProtected = 1;
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return result;
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}
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//===========================================================================
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void ImageDestroy(void)
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{
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VirtualFree(sg_DiskImageHelper.GetWorkBuffer(), 0, MEM_RELEASE);
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sg_DiskImageHelper.SetWorkBuffer(NULL);
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}
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//===========================================================================
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void ImageInitialize(void)
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{
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LPBYTE pBuffer = (LPBYTE) VirtualAlloc(NULL, TRACK_DENIBBLIZED_SIZE*2, MEM_COMMIT, PAGE_READWRITE);
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sg_DiskImageHelper.SetWorkBuffer(pBuffer);
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}
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//===========================================================================
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void ImageReadTrack( const HIMAGE hDiskImage,
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const int nTrack,
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const int nQuarterTrack,
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LPBYTE pTrackImageBuffer,
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int* pNibbles)
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{
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_ASSERT(nTrack >= 0);
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if (nTrack < 0)
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return;
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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if (ptr->pImageType->AllowRW() && ptr->ValidTrack[nTrack])
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{
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ptr->pImageType->Read(ptr, nTrack, nQuarterTrack, pTrackImageBuffer, pNibbles);
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}
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else
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{
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for (*pNibbles = 0; *pNibbles < NIBBLES_PER_TRACK; (*pNibbles)++)
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pTrackImageBuffer[*pNibbles] = (BYTE)(rand() & 0xFF);
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}
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}
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//===========================================================================
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void ImageWriteTrack( const HIMAGE hDiskImage,
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const int nTrack,
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const int nQuarterTrack,
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LPBYTE pTrackImage,
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const int nNibbles)
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{
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_ASSERT(nTrack >= 0);
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if (nTrack < 0)
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return;
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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if (ptr->pImageType->AllowRW() && !ptr->bWriteProtected)
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{
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ptr->pImageType->Write(ptr, nTrack, nQuarterTrack, pTrackImage, nNibbles);
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ptr->ValidTrack[nTrack] = 1;
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}
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}
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//===========================================================================
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int ImageGetNumTracks(const HIMAGE hDiskImage)
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{
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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return ptr ? ptr->uNumTracks : 0;
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}
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bool ImageIsWriteProtected(const HIMAGE hDiskImage)
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{
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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return ptr ? ptr->bWriteProtected : true;
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}
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bool ImageIsMultiFileZip(const HIMAGE hDiskImage)
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{
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
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return ptr ? (ptr->uNumEntriesInZip > 1) : false;
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}
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