AppleWin/source/DiskImage.cpp

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/*
AppleWin : An Apple //e emulator for Windows
Copyright (C) 1994-1996, Michael O'Brien
Copyright (C) 1999-2001, Oliver Schmidt
Copyright (C) 2002-2005, Tom Charlesworth
Copyright (C) 2006-2010, Tom Charlesworth, Michael Pohoreski
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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
*
* Author: Various
*/
#include "StdAfx.h"
#include "Structs.h"
#include "Common.h"
#include "DiskImage.h"
#include "DiskImageHelper.h"
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static CDiskImageHelper sg_DiskImageHelper;
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//===========================================================================
// Pre: *pWriteProtected_ already set to file's r/w status - see DiskInsert()
ImageError_e ImageOpen( LPCTSTR pszImageFilename,
HIMAGE* hDiskImage_,
bool* pWriteProtected_,
const bool bCreateIfNecessary,
std::string& strFilenameInZip)
{
if (! (pszImageFilename && hDiskImage_ && pWriteProtected_ && sg_DiskImageHelper.GetWorkBuffer()))
return eIMAGE_ERROR_BAD_POINTER;
// CREATE A RECORD FOR THE FILE, AND RETURN AN IMAGE HANDLE
*hDiskImage_ = (HIMAGE) VirtualAlloc(NULL, sizeof(ImageInfo), MEM_COMMIT, PAGE_READWRITE);
if (*hDiskImage_ == NULL)
return eIMAGE_ERROR_BAD_POINTER;
ZeroMemory(*hDiskImage_, sizeof(ImageInfo));
ImageInfo* pImageInfo = (ImageInfo*) *hDiskImage_;
pImageInfo->bWriteProtected = *pWriteProtected_;
ImageError_e Err = sg_DiskImageHelper.Open(pszImageFilename, pImageInfo, bCreateIfNecessary, strFilenameInZip);
if (pImageInfo->pImageType != NULL && Err == eIMAGE_ERROR_NONE && pImageInfo->pImageType->GetType() == eImageHDV)
Err = eIMAGE_ERROR_UNSUPPORTED_HDV;
if (Err != eIMAGE_ERROR_NONE)
{
ImageClose(*hDiskImage_, true);
*hDiskImage_ = (HIMAGE)0;
return Err;
}
// THE FILE MATCHES A KNOWN FORMAT
pImageInfo->uNumTracks = sg_DiskImageHelper.GetNumTracksInImage(pImageInfo->pImageType);
for (UINT uTrack = 0; uTrack < pImageInfo->uNumTracks; uTrack++)
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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}
//===========================================================================
void ImageClose(const HIMAGE hDiskImage, const bool bOpenError /*=false*/)
{
ImageInfo* ptr = (ImageInfo*) hDiskImage;
bool bDeleteFile = false;
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if (!bOpenError)
{
for (UINT uTrack = 0; uTrack < ptr->uNumTracks; uTrack++)
{
if (!ptr->ValidTrack[uTrack])
{
// TODO: Comment using info from this URL:
// http://groups.google.de/group/comp.emulators.apple2/msg/7a1b9317e7905152
bDeleteFile = true;
break;
}
}
}
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sg_DiskImageHelper.Close(ptr, bDeleteFile);
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VirtualFree(ptr, 0, MEM_RELEASE);
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}
//===========================================================================
BOOL ImageBoot(const HIMAGE hDiskImage)
{
ImageInfo* ptr = (ImageInfo*) hDiskImage;
BOOL result = 0;
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if (ptr->pImageType->AllowBoot())
result = ptr->pImageType->Boot(ptr);
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if (result)
ptr->bWriteProtected = 1;
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return result;
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}
//===========================================================================
void ImageDestroy(void)
{
VirtualFree(sg_DiskImageHelper.GetWorkBuffer(), 0, MEM_RELEASE);
sg_DiskImageHelper.SetWorkBuffer(NULL);
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}
//===========================================================================
void ImageInitialize(void)
{
LPBYTE pBuffer = (LPBYTE) VirtualAlloc(NULL, TRACK_DENIBBLIZED_SIZE*2, MEM_COMMIT, PAGE_READWRITE);
sg_DiskImageHelper.SetWorkBuffer(pBuffer);
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}
//===========================================================================
void ImageReadTrack( const HIMAGE hDiskImage,
const int nTrack,
const int nQuarterTrack,
LPBYTE pTrackImageBuffer,
int* pNibbles)
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{
_ASSERT(nTrack >= 0);
if (nTrack < 0)
return;
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
if (ptr->pImageType->AllowRW() && ptr->ValidTrack[nTrack])
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{
ptr->pImageType->Read(ptr, nTrack, nQuarterTrack, pTrackImageBuffer, pNibbles);
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}
else
{
for (*pNibbles = 0; *pNibbles < NIBBLES_PER_TRACK; (*pNibbles)++)
pTrackImageBuffer[*pNibbles] = (BYTE)(rand() & 0xFF);
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}
}
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//===========================================================================
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void ImageWriteTrack( const HIMAGE hDiskImage,
const int nTrack,
const int nQuarterTrack,
LPBYTE pTrackImage,
const int nNibbles)
{
_ASSERT(nTrack >= 0);
if (nTrack < 0)
return;
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ImageInfo* ptr = (ImageInfo*) hDiskImage;
if (ptr->pImageType->AllowRW() && !ptr->bWriteProtected)
{
ptr->pImageType->Write(ptr, nTrack, nQuarterTrack, pTrackImage, nNibbles);
ptr->ValidTrack[nTrack] = 1;
}
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}
//===========================================================================
int ImageGetNumTracks(const HIMAGE hDiskImage)
{
ImageInfo* ptr = (ImageInfo*) hDiskImage;
return ptr ? ptr->uNumTracks : 0;
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}
bool ImageIsWriteProtected(const HIMAGE hDiskImage)
{
ImageInfo* ptr = (ImageInfo*) hDiskImage;
return ptr ? ptr->bWriteProtected : true;
}
bool ImageIsMultiFileZip(const HIMAGE hDiskImage)
{
ImageInfo* ptr = (ImageInfo*) hDiskImage;
return ptr ? (ptr->uNumEntriesInZip > 1) : false;
}