ciderpress/diskimg/Container.cpp
2007-03-27 17:47:10 +00:00

123 lines
3.2 KiB
C++

/*
* CiderPress
* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
* See the file LICENSE for distribution terms.
*/
/*
* Base "container FS" support.
*/
#include "StdAfx.h"
#include "DiskImgPriv.h"
/*
* Blank out the volume usage map, setting all entries to "embedded".
*/
void
DiskFSContainer::SetVolumeUsageMap(void)
{
VolumeUsage::ChunkState cstate;
long block;
fVolumeUsage.Create(fpImg->GetNumBlocks());
cstate.isUsed = true;
cstate.isMarkedUsed = true;
cstate.purpose = VolumeUsage::kChunkPurposeEmbedded;
for (block = fpImg->GetNumBlocks()-1; block >= 0; block--)
fVolumeUsage.SetChunkState(block, &cstate);
}
/*
* Create a "placeholder" sub-volume. Useful for some of the tools when
* dealing with unformatted (or unknown-formatted) partitions.
*/
DIError
DiskFSContainer::CreatePlaceholder(long startBlock, long numBlocks,
const char* partName, const char* partType,
DiskImg** ppNewImg, DiskFS** ppNewFS)
{
DIError dierr = kDIErrNone;
DiskFS* pNewFS = nil;
DiskImg* pNewImg = nil;
WMSG3(" %s/CrPl creating placeholder for %ld +%ld\n", GetDebugName(),
startBlock, numBlocks);
if (startBlock > fpImg->GetNumBlocks()) {
WMSG3(" %s/CrPl start block out of range (%ld vs %ld)\n",
GetDebugName(), startBlock, fpImg->GetNumBlocks());
return kDIErrBadPartition;
}
pNewImg = new DiskImg;
if (pNewImg == nil) {
dierr = kDIErrMalloc;
goto bail;
}
if (partName != nil) {
if (partType != nil)
pNewImg->AddNote(DiskImg::kNoteInfo,
"Partition name='%s' type='%s'.", partName, partType);
else
pNewImg->AddNote(DiskImg::kNoteInfo,
"Partition name='%s'.", partName);
}
dierr = pNewImg->OpenImage(fpImg, startBlock, numBlocks);
if (dierr != kDIErrNone) {
WMSG4(" %s/CrPl: OpenImage(%ld,%ld) failed (err=%d)\n",
GetDebugName(), startBlock, numBlocks, dierr);
goto bail;
}
/*
* If this slot isn't formatted at all, the call will return with
* "unknown FS". If it's formatted enough to pass the initial test,
* but fails during "Initialize", we'll have a non-unknown value
* for the FS format. We need to stomp that.
*/
dierr = pNewImg->AnalyzeImage();
if (dierr != kDIErrNone) {
WMSG2(" %s/CrPl: analysis failed (err=%d)\n", GetDebugName(), dierr);
goto bail;
}
if (pNewImg->GetFSFormat() != DiskImg::kFormatUnknown) {
dierr = pNewImg->OverrideFormat(pNewImg->GetPhysicalFormat(),
DiskImg::kFormatUnknown, pNewImg->GetSectorOrder());
if (dierr != kDIErrNone) {
WMSG1(" %s/CrPl: unable to override to unknown\n",
GetDebugName());
goto bail;
}
}
/* open a DiskFS for the sub-image, allowing "unknown" */
pNewFS = pNewImg->OpenAppropriateDiskFS(true);
if (pNewFS == nil) {
WMSG1(" %s/CrPl: OpenAppropriateDiskFS failed\n", GetDebugName());
dierr = kDIErrUnsupportedFSFmt;
goto bail;
}
/* sets the DiskImg ptr (and very little else) */
dierr = pNewFS->Initialize(pNewImg, kInitFull);
if (dierr != kDIErrNone) {
WMSG2(" %s/CrPl: init failed (err=%d)\n", GetDebugName(), dierr);
goto bail;
}
bail:
if (dierr != kDIErrNone) {
delete pNewFS;
delete pNewImg;
} else {
*ppNewImg = pNewImg;
*ppNewFS = pNewFS;
}
return dierr;
}