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ciderpress/diskimg/Pascal.cpp
Andy McFadden 0d7d1b67e0 initial import
2007-03-27 17:47:10 +00:00

1908 lines
54 KiB
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/*
* CiderPress
* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
* See the file LICENSE for distribution terms.
*/
/*
* Implementation of DiskFSPascal class.
*
* Currently each file may only be open once.
*/
#include "StdAfx.h"
#include "DiskImgPriv.h"
/*
* ===========================================================================
* DiskFSPascal
* ===========================================================================
*/
const int kBlkSize = 512;
const int kVolHeaderBlock = 2; // first directory block
const int kMaxCatalogIterations = 64; // should be short, linear catalog
const int kHugeDir = 32;
static const char* kInvalidNameChars = "$=?,[#:";
/*
* See if this looks like a Pascal volume.
*
* We test a few fields in the volume directory for validity.
*/
static DIError
TestImage(DiskImg* pImg, DiskImg::SectorOrder imageOrder)
{
DIError dierr = kDIErrNone;
unsigned char blkBuf[512];
unsigned char volName[DiskFSPascal::kMaxVolumeName+1];
dierr = pImg->ReadBlockSwapped(kVolHeaderBlock, blkBuf, imageOrder,
DiskImg::kSectorOrderProDOS);
if (dierr != kDIErrNone)
goto bail;
if (!(blkBuf[0x00] == 0 && blkBuf[0x01] == 0) ||
!(blkBuf[0x04] == 0 && blkBuf[0x05] == 0) ||
!(blkBuf[0x06] > 0 && blkBuf[0x06] <= DiskFSPascal::kMaxVolumeName) ||
0)
{
dierr = kDIErrFilesystemNotFound;
goto bail;
}
/* volume name length is good, check the name itself */
/* (this may be overly restrictive, but it's probably good to be) */
memset(volName, 0, sizeof(volName));
memcpy(volName, &blkBuf[0x07], blkBuf[0x06]);
if (!DiskFSPascal::IsValidVolumeName((const char*) volName))
return kDIErrFilesystemNotFound;
bail:
return dierr;
}
/*
* Test to see if the image is a Pascal disk.
*/
/*static*/ DIError
DiskFSPascal::TestFS(DiskImg* pImg, DiskImg::SectorOrder* pOrder,
DiskImg::FSFormat* pFormat, FSLeniency leniency)
{
DiskImg::SectorOrder ordering[DiskImg::kSectorOrderMax];
DiskImg::GetSectorOrderArray(ordering, *pOrder);
for (int i = 0; i < DiskImg::kSectorOrderMax; i++) {
if (ordering[i] == DiskImg::kSectorOrderUnknown)
continue;
if (TestImage(pImg, ordering[i]) == kDIErrNone) {
*pOrder = ordering[i];
*pFormat = DiskImg::kFormatPascal;
return kDIErrNone;
}
}
WMSG0(" Pascal didn't find valid FS\n");
return kDIErrFilesystemNotFound;
}
/*
* Get things rolling.
*
* Since we're assured that this is a valid disk, errors encountered from here
* on out must be handled somehow, possibly by claiming that the disk is
* completely full and has no files on it.
*/
DIError
DiskFSPascal::Initialize(void)
{
DIError dierr = kDIErrNone;
fDiskIsGood = false; // hosed until proven innocent
fEarlyDamage = false;
fVolumeUsage.Create(fpImg->GetNumBlocks());
dierr = LoadVolHeader();
if (dierr != kDIErrNone)
goto bail;
DumpVolHeader();
dierr = ProcessCatalog();
if (dierr != kDIErrNone)
goto bail;
dierr = ScanFileUsage();
if (dierr != kDIErrNone) {
/* this might not be fatal; just means that *some* files are bad */
goto bail;
}
fDiskIsGood = CheckDiskIsGood();
fVolumeUsage.Dump();
//A2File* pFile;
//pFile = GetNextFile(nil);
//while (pFile != nil) {
// pFile->Dump();
// pFile = GetNextFile(pFile);
//}
bail:
return dierr;
}
/*
* Read some interesting fields from the volume header.
*/
DIError
DiskFSPascal::LoadVolHeader(void)
{
DIError dierr = kDIErrNone;
unsigned char blkBuf[kBlkSize];
int nameLen, maxFiles;
dierr = fpImg->ReadBlock(kVolHeaderBlock, blkBuf);
if (dierr != kDIErrNone)
goto bail;
/* vol header is same size as dir entry, but different layout */
fStartBlock = GetShortLE(&blkBuf[0x00]);
assert(fStartBlock == 0); // verified in "TestImage"
fNextBlock = GetShortLE(&blkBuf[0x02]);
assert(GetShortLE(&blkBuf[0x04]) == 0); // type
nameLen = blkBuf[0x06] & 0x07;
memcpy(fVolumeName, &blkBuf[0x07], nameLen);
fVolumeName[nameLen] = '\0';
fTotalBlocks = GetShortLE(&blkBuf[0x0e]);
fNumFiles = GetShortLE(&blkBuf[0x10]);
fAccessWhen = GetShortLE(&blkBuf[0x12]); // time of last access
fDateSetWhen = GetShortLE(&blkBuf[0x14]); // most recent date set
fStuff1 = GetShortLE(&blkBuf[0x16]); // filler
fStuff2 = GetShortLE(&blkBuf[0x18]); // filler
if (fTotalBlocks != fpImg->GetNumBlocks()) {
// saw this most recently on a 40-track .APP image; not a problem
WMSG2(" Pascal WARNING: total (%u) != img (%ld)\n",
fTotalBlocks, fpImg->GetNumBlocks());
}
/*
* Sanity checks.
*/
if (fNextBlock > 34) {
// directory really shouldn't be more than 6; I'm being generous
fpImg->AddNote(DiskImg::kNoteWarning,
"Pascal directory is too big (%d blocks); trimming.",
fNextBlock - fStartBlock);
}
/* max #of file entries, including the vol dir header */
maxFiles = ((fNextBlock - kVolHeaderBlock) * kBlkSize) / kDirectoryEntryLen;
if (fNumFiles > maxFiles-1) {
fpImg->AddNote(DiskImg::kNoteWarning,
"Pascal fNumFiles (%d) exceeds max files (%d); trimming.\n",
fNumFiles, maxFiles-1);
fEarlyDamage = true;
}
SetVolumeID();
bail:
return dierr;
}
/*
* Set the volume ID field.
*/
void
DiskFSPascal::SetVolumeID(void)
{
sprintf(fVolumeID, "Pascal %s:", fVolumeName);
}
/*
* Dump what we pulled out of the volume header.
*/
void
DiskFSPascal::DumpVolHeader(void)
{
time_t access, dateSet;
WMSG1(" Pascal volume header for '%s'\n", fVolumeName);
WMSG2(" startBlock=%d nextBlock=%d\n",
fStartBlock, fNextBlock);
WMSG4(" totalBlocks=%d numFiles=%d access=0x%04x dateSet=0x%04x\n",
fTotalBlocks, fNumFiles, fAccessWhen, fDateSetWhen);
access = A2FilePascal::ConvertPascalDate(fAccessWhen);
dateSet = A2FilePascal::ConvertPascalDate(fDateSetWhen);
WMSG1(" -->access %.24s\n", ctime(&access));
WMSG1(" -->dateSet %.24s\n", ctime(&dateSet));
//WMSG2("Unconvert access=0x%04x dateSet=0x%04x\n",
// A2FilePascal::ConvertPascalDate(access),
// A2FilePascal::ConvertPascalDate(dateSet));
}
/*
* Read the catalog from the disk.
*
* No distinction is made for block boundaries, so we want to slurp the
* entire thing into memory.
*
* Sets "fDirectory".
*/
DIError
DiskFSPascal::LoadCatalog(void)
{
DIError dierr = kDIErrNone;
unsigned char* dirPtr;
int block, numBlocks;
assert(fDirectory == nil);
numBlocks = fNextBlock - kVolHeaderBlock;
if (numBlocks <= 0 || numBlocks > kHugeDir) {
dierr = kDIErrBadDiskImage;
goto bail;
}
fDirectory = new unsigned char[kBlkSize * numBlocks];
if (fDirectory == nil) {
dierr = kDIErrMalloc;
goto bail;
}
block = kVolHeaderBlock;
dirPtr = fDirectory;
while (numBlocks--) {
dierr = fpImg->ReadBlock(block, dirPtr);
if (dierr != kDIErrNone)
goto bail;
block++;
dirPtr += kBlkSize;
}
bail:
if (dierr != kDIErrNone) {
delete[] fDirectory;
fDirectory = nil;
}
return dierr;
}
/*
* Write our copy of the catalog back out to disk.
*/
DIError
DiskFSPascal::SaveCatalog(void)
{
DIError dierr = kDIErrNone;
unsigned char* dirPtr;
int block, numBlocks;
assert(fDirectory != nil);
numBlocks = fNextBlock - kVolHeaderBlock;
block = kVolHeaderBlock;
dirPtr = fDirectory;
while (numBlocks--) {
dierr = fpImg->WriteBlock(block, dirPtr);
if (dierr != kDIErrNone)
goto bail;
block++;
dirPtr += kBlkSize;
}
bail:
return dierr;
}
/*
* Free the catalog storage.
*/
void
DiskFSPascal::FreeCatalog(void)
{
delete[] fDirectory;
fDirectory = nil;
}
/*
* Process the catalog into A2File structures.
*/
DIError
DiskFSPascal::ProcessCatalog(void)
{
DIError dierr = kDIErrNone;
int i, nameLen;
A2FilePascal* pFile;
const unsigned char* dirPtr;
unsigned short prevNextBlock = fNextBlock;
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
dirPtr = fDirectory + kDirectoryEntryLen; // skip vol dir entry
for (i = 0; i < fNumFiles; i++) {
pFile = new A2FilePascal(this);
pFile->fStartBlock = GetShortLE(&dirPtr[0x00]);
pFile->fNextBlock = GetShortLE(&dirPtr[0x02]);
pFile->fFileType = (A2FilePascal::FileType) GetShortLE(&dirPtr[0x04]);
nameLen = dirPtr[0x06] & 0x0f;
memcpy(pFile->fFileName, &dirPtr[0x07], nameLen);
pFile->fFileName[nameLen] = '\0';
pFile->fBytesRemaining = GetShortLE(&dirPtr[0x16]);
pFile->fModWhen = GetShortLE(&dirPtr[0x18]);
/* check bytesRem before setting length field */
if (pFile->fBytesRemaining > kBlkSize) {
WMSG2(" Pascal found strange bytesRem %u on '%s', trimming\n",
pFile->fBytesRemaining, pFile->fFileName);
pFile->fBytesRemaining = kBlkSize;
pFile->SetQuality(A2File::kQualitySuspicious);
}
pFile->fLength = pFile->fBytesRemaining +
(pFile->fNextBlock - pFile->fStartBlock -1) * kBlkSize;
/*
* Check values.
*/
if (pFile->fStartBlock == pFile->fNextBlock) {
WMSG1(" Pascal found zero-block file '%s'\n", pFile->fFileName);
pFile->SetQuality(A2File::kQualityDamaged);
}
if (pFile->fStartBlock < prevNextBlock) {
WMSG3(" Pascal start of '%s' (%d) overlaps previous end (%d)\n",
pFile->fFileName, pFile->fStartBlock, prevNextBlock);
pFile->SetQuality(A2File::kQualityDamaged);
}
if (pFile->fNextBlock > fpImg->GetNumBlocks()) {
WMSG3(" Pascal invalid 'next' block %d (max %ld) '%s'\n",
pFile->fNextBlock, fpImg->GetNumBlocks(), pFile->fFileName);
pFile->fStartBlock = pFile->fNextBlock = 0;
pFile->fLength = 0;
pFile->SetQuality(A2File::kQualityDamaged);
} else if (pFile->fNextBlock > fTotalBlocks) {
WMSG3(" Pascal 'next' block %d exceeds max (%d) '%s'\n",
pFile->fNextBlock, fTotalBlocks, pFile->fFileName);
pFile->SetQuality(A2File::kQualitySuspicious);
}
//pFile->Dump();
AddFileToList(pFile);
dirPtr += kDirectoryEntryLen;
prevNextBlock = pFile->fNextBlock;
}
bail:
FreeCatalog();
return dierr;
}
/*
* Create the volume usage map. Since UCSD Pascal volumes have neither
* in-use maps nor index blocks, this is pretty straightforward.
*/
DIError
DiskFSPascal::ScanFileUsage(void)
{
int block;
/* start with the boot blocks */
SetBlockUsage(0, VolumeUsage::kChunkPurposeSystem);
SetBlockUsage(1, VolumeUsage::kChunkPurposeSystem);
for (block = kVolHeaderBlock; block < fNextBlock; block++) {
SetBlockUsage(block, VolumeUsage::kChunkPurposeVolumeDir);
}
A2FilePascal* pFile;
pFile = (A2FilePascal*) GetNextFile(nil);
while (pFile != nil) {
for (block = pFile->fStartBlock; block < pFile->fNextBlock; block++)
SetBlockUsage(block, VolumeUsage::kChunkPurposeUserData);
pFile = (A2FilePascal*) GetNextFile(pFile);
}
return kDIErrNone;
}
/*
* Update an entry in the volume usage map.
*/
void
DiskFSPascal::SetBlockUsage(long block, VolumeUsage::ChunkPurpose purpose)
{
VolumeUsage::ChunkState cstate;
fVolumeUsage.GetChunkState(block, &cstate);
if (cstate.isUsed) {
cstate.purpose = VolumeUsage::kChunkPurposeConflict;
WMSG1(" Pascal conflicting uses for bl=%ld\n", block);
} else {
cstate.isUsed = true;
cstate.isMarkedUsed = true;
cstate.purpose = purpose;
}
fVolumeUsage.SetChunkState(block, &cstate);
}
/*
* Test a string for validity as a Pascal volume name.
*
* Volume names can only be 7 characters long, but otherwise obey the same
* rules as file names.
*/
/*static*/ bool
DiskFSPascal::IsValidVolumeName(const char* name)
{
if (name == nil) {
assert(false);
return false;
}
if (strlen(name) > kMaxVolumeName)
return false;
return IsValidFileName(name);
}
/*
* Test a string for validity as a Pascal file name.
*
* Filenames can be up to 15 characters long. All characters are valid.
* However, the system filer gets bent out of shape if you use spaces,
* control characters, any of the wildcards ($=?), or filer meta-characters
* (,[#:). It also converts all alpha characters to upper case, but we can
* take care of that later.
*/
/*static*/ bool
DiskFSPascal::IsValidFileName(const char* name)
{
assert(name != nil);
if (name[0] == '\0')
return false;
if (strlen(name) > A2FilePascal::kMaxFileName)
return false;
/* must be A-Z 0-9 '.' */
while (*name != '\0') {
if (*name <= 0x20 || *name >= 0x7f) // no space, del, or ctrl
return false;
//if (*name >= 'a' && *name <= 'z') // no lower case
// return false;
if (strchr(kInvalidNameChars, *name) != nil) // filer metacharacters
return false;
name++;
}
return true;
}
/*
* Put a Pascal filesystem image on the specified DiskImg.
*/
DIError
DiskFSPascal::Format(DiskImg* pDiskImg, const char* volName)
{
DIError dierr = kDIErrNone;
unsigned char blkBuf[kBlkSize];
long formatBlocks;
if (!IsValidVolumeName(volName))
return kDIErrInvalidArg;
/* set fpImg so calls that rely on it will work; we un-set it later */
assert(fpImg == nil);
SetDiskImg(pDiskImg);
WMSG0(" Pascal formatting disk image\n");
/* write ProDOS-style blocks */
dierr = fpImg->OverrideFormat(fpImg->GetPhysicalFormat(),
DiskImg::kFormatGenericProDOSOrd, fpImg->GetSectorOrder());
if (dierr != kDIErrNone)
goto bail;
formatBlocks = pDiskImg->GetNumBlocks();
if (formatBlocks != 280 && formatBlocks != 1600) {
WMSG1(" Pascal: rejecting format req blocks=%ld\n", formatBlocks);
assert(false);
return kDIErrInvalidArg;
}
/*
* We should now zero out the disk blocks, but this is done automatically
* on new disk images, so there's no need to do it here.
*/
// dierr = fpImg->ZeroImage();
WMSG0(" Pascal (not zeroing blocks)\n");
/*
* Start by writing blocks 0 and 1 (the boot blocks). The file
* APPLE3:FORMATTER.DATA holds images for 3.5" and 5.25" disks.
*/
dierr = WriteBootBlocks();
if (dierr != kDIErrNone)
goto bail;
/*
* Write the disk volume entry.
*/
memset(blkBuf, 0, sizeof(blkBuf));
PutShortLE(&blkBuf[0x00], 0); // start block
PutShortLE(&blkBuf[0x02], 6); // next block
PutShortLE(&blkBuf[0x04], 0); // "file" type
blkBuf[0x06] = strlen(volName);
memcpy(&blkBuf[0x07], volName, strlen(volName));
PutShortLE(&blkBuf[0x0e], (unsigned short) pDiskImg->GetNumBlocks());
PutShortLE(&blkBuf[0x10], 0); // num files
PutShortLE(&blkBuf[0x12], 0); // last access date
PutShortLE(&blkBuf[0x14], 0xa87b); // last date set (Nov 7 1984)
dierr = fpImg->WriteBlock(kVolHeaderBlock, blkBuf);
if (dierr != kDIErrNone) {
WMSG2(" Format: block %d write failed (err=%d)\n",
kVolHeaderBlock, dierr);
goto bail;
}
/* check our work, and set some object fields, by reading what we wrote */
dierr = LoadVolHeader();
if (dierr != kDIErrNone) {
WMSG1(" GLITCH: couldn't read header we just wrote (err=%d)\n", dierr);
goto bail;
}
bail:
SetDiskImg(nil); // shouldn't really be set by us
return dierr;
}
/*
* Blocks 0 and 1 of a 5.25" bootable Pascal disk, formatted by
* APPLE3:FORMATTER from Pascal v1.3.
*/
const unsigned char gPascal525Block0[] = {
0x01, 0xe0, 0x70, 0xb0, 0x04, 0xe0, 0x40, 0xb0, 0x39, 0xbd, 0x88, 0xc0,
0x20, 0x20, 0x08, 0xa2, 0x00, 0xbd, 0x25, 0x08, 0x09, 0x80, 0x20, 0xfd,
0xfb, 0xe8, 0xe0, 0x1d, 0xd0, 0xf3, 0xf0, 0xfe, 0xa9, 0x0a, 0x4c, 0x24,
0xfc, 0x4d, 0x55, 0x53, 0x54, 0x20, 0x42, 0x4f, 0x4f, 0x54, 0x20, 0x46,
0x52, 0x4f, 0x4d, 0x20, 0x53, 0x4c, 0x4f, 0x54, 0x20, 0x34, 0x2c, 0x20,
0x35, 0x20, 0x4f, 0x52, 0x20, 0x36, 0x8a, 0x85, 0x43, 0x4a, 0x4a, 0x4a,
0x4a, 0x09, 0xc0, 0x85, 0x0d, 0xa9, 0x5c, 0x85, 0x0c, 0xad, 0x00, 0x08,
0xc9, 0x06, 0xb0, 0x0a, 0x69, 0x02, 0x8d, 0x00, 0x08, 0xe6, 0x3d, 0x6c,
0x0c, 0x00, 0xa9, 0x00, 0x8d, 0x78, 0x04, 0xa9, 0x0a, 0x85, 0x0e, 0xa9,
0x80, 0x85, 0x3f, 0x85, 0x11, 0xa9, 0x00, 0x85, 0x10, 0xa9, 0x08, 0x85,
0x02, 0xa9, 0x02, 0x85, 0x0f, 0xa9, 0x00, 0x20, 0x4c, 0x09, 0xa2, 0x4e,
0xa0, 0x06, 0xb1, 0x10, 0xd9, 0x39, 0x09, 0xf0, 0x2b, 0x18, 0xa5, 0x10,
0x69, 0x1a, 0x85, 0x10, 0x90, 0x02, 0xe6, 0x11, 0xca, 0xd0, 0xe9, 0xc6,
0x0e, 0xd0, 0xcc, 0x20, 0x20, 0x08, 0xa6, 0x43, 0xbd, 0x88, 0xc0, 0xa2,
0x00, 0xbd, 0x2a, 0x09, 0x09, 0x80, 0x20, 0xfd, 0xfb, 0xe8, 0xe0, 0x15,
0xd0, 0xf3, 0xf0, 0xfe, 0xc8, 0xc0, 0x13, 0xd0, 0xc9, 0xad, 0x81, 0xc0,
0xad, 0x81, 0xc0, 0xa9, 0xd0, 0x85, 0x3f, 0xa9, 0x30, 0x85, 0x02, 0xa0,
0x00, 0xb1, 0x10, 0x85, 0x0f, 0xc8, 0xb1, 0x10, 0x20, 0x4c, 0x09, 0xad,
0x89, 0xc0, 0xa9, 0xd0, 0x85, 0x3f, 0xa9, 0x10, 0x85, 0x02, 0xa0, 0x00,
0xb1, 0x10, 0x18, 0x69, 0x18, 0x85, 0x0f, 0xc8, 0xb1, 0x10, 0x69, 0x00,
0x20, 0x4c, 0x09, 0xa5, 0x43, 0xc9, 0x50, 0xf0, 0x08, 0x90, 0x1a, 0xad,
0x80, 0xc0, 0x6c, 0xf8, 0xff, 0xa2, 0x00, 0x8e, 0xc4, 0xfe, 0xe8, 0x8e,
0xc6, 0xfe, 0xe8, 0x8e, 0xb6, 0xfe, 0xe8, 0x8e, 0xb8, 0xfe, 0x4c, 0xfb,
0x08, 0xa2, 0x00, 0x8e, 0xc0, 0xfe, 0xe8, 0x8e, 0xc2, 0xfe, 0xa2, 0x04,
0x8e, 0xb6, 0xfe, 0xe8, 0x8e, 0xb8, 0xfe, 0x4c, 0xfb, 0x08, 0x4e, 0x4f,
0x20, 0x46, 0x49, 0x4c, 0x45, 0x20, 0x53, 0x59, 0x53, 0x54, 0x45, 0x4d,
0x2e, 0x41, 0x50, 0x50, 0x4c, 0x45, 0x20, 0x0c, 0x53, 0x59, 0x53, 0x54,
0x45, 0x4d, 0x2e, 0x41, 0x50, 0x50, 0x4c, 0x45, 0x4a, 0x08, 0xa5, 0x0f,
0x29, 0x07, 0x0a, 0x85, 0x00, 0xa5, 0x0f, 0x28, 0x6a, 0x4a, 0x4a, 0x85,
0xf0, 0xa9, 0x00, 0x85, 0x3e, 0x4c, 0x78, 0x09, 0xa6, 0x02, 0xf0, 0x22,
0xc6, 0x02, 0xe6, 0x3f, 0xe6, 0x00, 0xa5, 0x00, 0x49, 0x10, 0xd0, 0x04,
0x85, 0x00, 0xe6, 0xf0, 0xa4, 0x00, 0xb9, 0x8b, 0x09, 0x85, 0xf1, 0xa2,
0x00, 0xe4, 0x02, 0xf0, 0x05, 0x20, 0x9b, 0x09, 0x90, 0xda, 0x60, 0x00,
0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x01, 0x03, 0x05, 0x07, 0x09,
0x0b, 0x0d, 0x0f, 0xa6, 0x43, 0xa5, 0xf0, 0x0a, 0x0e, 0x78, 0x04, 0x20,
0xa3, 0x0a, 0x4e, 0x78, 0x04, 0x20, 0x47, 0x0a, 0xb0, 0xfb, 0xa4, 0x2e,
0x8c, 0x78, 0x04, 0xc4, 0xf0, 0xd0, 0xe6, 0xa5, 0x2d, 0xc5, 0xf1, 0xd0,
0xec, 0x20, 0xdf, 0x09, 0xb0, 0xe7, 0x20, 0xc7, 0x09, 0x18, 0x60, 0xa0,
0x00, 0xa2, 0x56, 0xca, 0x30, 0xfb, 0xb9, 0x00, 0x02, 0x5e, 0x00, 0x03,
0x2a, 0x5e, 0x00, 0x03, 0x2a, 0x91, 0x3e, 0xc8, 0xd0, 0xed, 0x60, 0xa0,
0x20, 0x88, 0xf0, 0x61, 0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0x49, 0xd5, 0xd0,
0xf4, 0xea, 0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0xc9, 0xaa, 0xd0, 0xf2, 0xa0,
0x56, 0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0xc9, 0xad
};
const unsigned char gPascal525Block1[] = {
0xd0, 0xe7, 0xa9, 0x00, 0x88, 0x84, 0x26, 0xbc, 0x8c, 0xc0, 0x10, 0xfb,
0x59, 0xd6, 0x02, 0xa4, 0x26, 0x99, 0x00, 0x03, 0xd0, 0xee, 0x84, 0x26,
0xbc, 0x8c, 0xc0, 0x10, 0xfb, 0x59, 0xd6, 0x02, 0xa4, 0x26, 0x99, 0x00,
0x02, 0xc8, 0xd0, 0xee, 0xbc, 0x8c, 0xc0, 0x10, 0xfb, 0xd9, 0xd6, 0x02,
0xd0, 0x13, 0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0xc9, 0xde, 0xd0, 0x0a, 0xea,
0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0xc9, 0xaa, 0xf0, 0x5c, 0x38, 0x60, 0xa0,
0xfc, 0x84, 0x26, 0xc8, 0xd0, 0x04, 0xe6, 0x26, 0xf0, 0xf3, 0xbd, 0x8c,
0xc0, 0x10, 0xfb, 0xc9, 0xd5, 0xd0, 0xf0, 0xea, 0xbd, 0x8c, 0xc0, 0x10,
0xfb, 0xc9, 0xaa, 0xd0, 0xf2, 0xa0, 0x03, 0xbd, 0x8c, 0xc0, 0x10, 0xfb,
0xc9, 0x96, 0xd0, 0xe7, 0xa9, 0x00, 0x85, 0x27, 0xbd, 0x8c, 0xc0, 0x10,
0xfb, 0x2a, 0x85, 0x26, 0xbd, 0x8c, 0xc0, 0x10, 0xfb, 0x25, 0x26, 0x99,
0x2c, 0x00, 0x45, 0x27, 0x88, 0x10, 0xe7, 0xa8, 0xd0, 0xb7, 0xbd, 0x8c,
0xc0, 0x10, 0xfb, 0xc9, 0xde, 0xd0, 0xae, 0xea, 0xbd, 0x8c, 0xc0, 0x10,
0xfb, 0xc9, 0xaa, 0xd0, 0xa4, 0x18, 0x60, 0x86, 0x2b, 0x85, 0x2a, 0xcd,
0x78, 0x04, 0xf0, 0x48, 0xa9, 0x00, 0x85, 0x26, 0xad, 0x78, 0x04, 0x85,
0x27, 0x38, 0xe5, 0x2a, 0xf0, 0x37, 0xb0, 0x07, 0x49, 0xff, 0xee, 0x78,
0x04, 0x90, 0x05, 0x69, 0xfe, 0xce, 0x78, 0x04, 0xc5, 0x26, 0x90, 0x02,
0xa5, 0x26, 0xc9, 0x0c, 0xb0, 0x01, 0xa8, 0x20, 0xf4, 0x0a, 0xb9, 0x15,
0x0b, 0x20, 0x04, 0x0b, 0xa5, 0x27, 0x29, 0x03, 0x0a, 0x05, 0x2b, 0xaa,
0xbd, 0x80, 0xc0, 0xb9, 0x21, 0x0b, 0x20, 0x04, 0x0b, 0xe6, 0x26, 0xd0,
0xbf, 0x20, 0x04, 0x0b, 0xad, 0x78, 0x04, 0x29, 0x03, 0x0a, 0x05, 0x2b,
0xaa, 0xbd, 0x81, 0xc0, 0xa6, 0x2b, 0x60, 0xea, 0xa2, 0x11, 0xca, 0xd0,
0xfd, 0xe6, 0x46, 0xd0, 0x02, 0xe6, 0x47, 0x38, 0xe9, 0x01, 0xd0, 0xf0,
0x60, 0x01, 0x30, 0x28, 0x24, 0x20, 0x1e, 0x1d, 0x1c, 0x1c, 0x1c, 0x1c,
0x1c, 0x70, 0x2c, 0x26, 0x22, 0x1f, 0x1e, 0x1d, 0x1c, 0x1c, 0x1c, 0x1c,
0x1c, 0x20, 0x43, 0x4f, 0x50, 0x59, 0x52, 0x49, 0x47, 0x48, 0x54, 0x20,
0x41, 0x50, 0x50, 0x4c, 0x45, 0x20, 0x43, 0x4f, 0x4d, 0x50, 0x55, 0x54,
0x45, 0x52, 0x2c, 0x20, 0x49, 0x4e, 0x43, 0x2e, 0x2c, 0x20, 0x31, 0x39,
0x38, 0x34, 0x2c, 0x20, 0x31, 0x39, 0x38, 0x35, 0x20, 0x43, 0x2e, 0x4c,
0x45, 0x55, 0x4e, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x68, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xbb
};
/*
* Block 0 of a 3.5" bootable Pascal disk, formatted by
* APPLE3:FORMATTER from Pascal v1.3. Block 1 is zeroed out.
*/
unsigned char gPascal35Block0[] = {
0x01, 0xe0, 0x70, 0xb0, 0x04, 0xe0, 0x40, 0xb0, 0x39, 0xbd, 0x88, 0xc0,
0x20, 0x20, 0x08, 0xa2, 0x00, 0xbd, 0x25, 0x08, 0x09, 0x80, 0x20, 0xfd,
0xfb, 0xe8, 0xe0, 0x1d, 0xd0, 0xf3, 0xf0, 0xfe, 0xa9, 0x0a, 0x4c, 0x24,
0xfc, 0x4d, 0x55, 0x53, 0x54, 0x20, 0x42, 0x4f, 0x4f, 0x54, 0x20, 0x46,
0x52, 0x4f, 0x4d, 0x20, 0x53, 0x4c, 0x4f, 0x54, 0x20, 0x34, 0x2c, 0x20,
0x35, 0x20, 0x4f, 0x52, 0x20, 0x36, 0x8a, 0x85, 0x43, 0x4a, 0x4a, 0x4a,
0x4a, 0x09, 0xc0, 0x85, 0x15, 0x8d, 0x5d, 0x09, 0xa9, 0x00, 0x8d, 0x78,
0x04, 0x85, 0x14, 0xa9, 0x0a, 0x85, 0x0e, 0xa9, 0x80, 0x85, 0x13, 0x85,
0x11, 0xa9, 0x00, 0x85, 0x10, 0x85, 0x0b, 0xa9, 0x02, 0x85, 0x0a, 0xa9,
0x04, 0x85, 0x02, 0x20, 0x40, 0x09, 0xa2, 0x4e, 0xa0, 0x06, 0xb1, 0x10,
0xd9, 0x2d, 0x09, 0xf0, 0x2b, 0x18, 0xa5, 0x10, 0x69, 0x1a, 0x85, 0x10,
0x90, 0x02, 0xe6, 0x11, 0xca, 0xd0, 0xe9, 0xc6, 0x0e, 0xd0, 0xcc, 0x20,
0x20, 0x08, 0xa6, 0x43, 0xbd, 0x88, 0xc0, 0xa2, 0x00, 0xbd, 0x1e, 0x09,
0x09, 0x80, 0x20, 0xfd, 0xfb, 0xe8, 0xe0, 0x15, 0xd0, 0xf3, 0xf0, 0xfe,
0xc8, 0xc0, 0x13, 0xd0, 0xc9, 0xad, 0x83, 0xc0, 0xad, 0x83, 0xc0, 0xa9,
0xd0, 0x85, 0x13, 0xa0, 0x00, 0xb1, 0x10, 0x85, 0x0a, 0xc8, 0xb1, 0x10,
0x85, 0x0b, 0xa9, 0x18, 0x85, 0x02, 0x20, 0x40, 0x09, 0xad, 0x8b, 0xc0,
0xa9, 0xd0, 0x85, 0x13, 0xa0, 0x00, 0xb1, 0x10, 0x18, 0x69, 0x18, 0x85,
0x0a, 0xc8, 0xb1, 0x10, 0x69, 0x00, 0x85, 0x0b, 0xa9, 0x08, 0x85, 0x02,
0x20, 0x40, 0x09, 0xa5, 0x43, 0xc9, 0x50, 0xf0, 0x08, 0x90, 0x1a, 0xad,
0x80, 0xc0, 0x6c, 0xf8, 0xff, 0xa2, 0x00, 0x8e, 0xc4, 0xfe, 0xe8, 0x8e,
0xc6, 0xfe, 0xe8, 0x8e, 0xb6, 0xfe, 0xe8, 0x8e, 0xb8, 0xfe, 0x4c, 0xef,
0x08, 0xa2, 0x00, 0x8e, 0xc0, 0xfe, 0xe8, 0x8e, 0xc2, 0xfe, 0xa2, 0x04,
0x8e, 0xb6, 0xfe, 0xe8, 0x8e, 0xb8, 0xfe, 0x4c, 0xef, 0x08, 0x4e, 0x4f,
0x20, 0x46, 0x49, 0x4c, 0x45, 0x20, 0x53, 0x59, 0x53, 0x54, 0x45, 0x4d,
0x2e, 0x41, 0x50, 0x50, 0x4c, 0x45, 0x20, 0x0c, 0x53, 0x59, 0x53, 0x54,
0x45, 0x4d, 0x2e, 0x41, 0x50, 0x50, 0x4c, 0x45, 0xa9, 0x01, 0x85, 0x42,
0xa0, 0xff, 0xb1, 0x14, 0x8d, 0x5c, 0x09, 0xa9, 0x00, 0x85, 0x44, 0xa5,
0x13, 0x85, 0x45, 0xa5, 0x0a, 0x85, 0x46, 0xa5, 0x0b, 0x85, 0x47, 0x20,
0x00, 0x00, 0x90, 0x03, 0x4c, 0x5b, 0x08, 0xc6, 0x02, 0xf0, 0x0c, 0xe6,
0x13, 0xe6, 0x13, 0xe6, 0x0a, 0xd0, 0xdc, 0xe6, 0x0b, 0xd0, 0xd8, 0x60,
0x20, 0x43, 0x4f, 0x50, 0x59, 0x52, 0x49, 0x47, 0x48, 0x54, 0x20, 0x41,
0x50, 0x50, 0x4c, 0x45, 0x20, 0x43, 0x4f, 0x4d, 0x50, 0x55, 0x54, 0x45,
0x52, 0x2c, 0x20, 0x49, 0x4e, 0x43, 0x2e, 0x2c, 0x20, 0x31, 0x39, 0x38,
0x34, 0x2c, 0x20, 0x31, 0x39, 0x38, 0x35, 0x20, 0x43, 0x2e, 0x4c, 0x45,
0x55, 0x4e, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*
* Write the Pascal boot blocks onto the disk image.
*/
DIError
DiskFSPascal::WriteBootBlocks(void)
{
DIError dierr;
unsigned char block0[512];
unsigned char block1[512];
bool is525 = false;
assert(fpImg->GetHasBlocks());
if (fpImg->GetNumBlocks() == 280)
is525 = true;
else if (fpImg->GetNumBlocks() == 1600)
is525 = false;
else {
WMSG1(" Pascal boot blocks for blocks=%ld unknown\n",
fpImg->GetNumBlocks());
return kDIErrInternal;
}
if (is525) {
memcpy(block0, gPascal525Block0, sizeof(block0));
memcpy(block1, gPascal525Block1, sizeof(block1));
} else {
memcpy(block0, gPascal35Block0, sizeof(block0));
memset(block1, 0, sizeof(block1));
}
dierr = fpImg->WriteBlock(0, block0);
if (dierr != kDIErrNone) {
WMSG1(" WriteBootBlocks: block0 write failed (err=%d)\n", dierr);
return dierr;
}
dierr = fpImg->WriteBlock(1, block1);
if (dierr != kDIErrNone) {
WMSG1(" WriteBootBlocks: block1 write failed (err=%d)\n", dierr);
return dierr;
}
return kDIErrNone;
}
/*
* Scan for damaged files and conflicting file allocation entries.
*
* Appends some entries to the DiskImg notes, so this should only be run
* once per DiskFS.
*
* Returns "true" if disk appears to be perfect, "false" otherwise.
*/
bool
DiskFSPascal::CheckDiskIsGood(void)
{
//DIError dierr;
bool result = true;
if (fEarlyDamage)
result = false;
/* (don't need to check to see if the boot blocks or disk catalog are
marked in use -- the directory is defined by the set of blocks
in the volume header) */
/*
* Scan for "damaged" or "suspicious" files diagnosed earlier.
*/
bool damaged, suspicious;
ScanForDamagedFiles(&damaged, &suspicious);
if (damaged) {
fpImg->AddNote(DiskImg::kNoteWarning,
"One or more files are damaged.");
result = false;
} else if (suspicious) {
fpImg->AddNote(DiskImg::kNoteWarning,
"One or more files look suspicious.");
result = false;
}
return result;
}
/*
* Run through the list of files and count up the free blocks.
*/
DIError
DiskFSPascal::GetFreeSpaceCount(long* pTotalUnits, long* pFreeUnits,
int* pUnitSize) const
{
A2FilePascal* pFile;
long freeBlocks = 0;
unsigned short prevNextBlock = fNextBlock;
pFile = (A2FilePascal*) GetNextFile(nil);
while (pFile != nil) {
freeBlocks += pFile->fStartBlock - prevNextBlock;
prevNextBlock = pFile->fNextBlock;
pFile = (A2FilePascal*) GetNextFile(pFile);
}
freeBlocks += fTotalBlocks - prevNextBlock;
*pTotalUnits = fTotalBlocks;
*pFreeUnits = freeBlocks;
*pUnitSize = kBlockSize;
return kDIErrNone;
}
/*
* Normalize a Pascal path. Used when adding files from DiskArchive.
*
* "*pNormalizedBufLen" is used to pass in the length of the buffer and
* pass out the length of the string (should the buffer prove inadequate).
*/
DIError
DiskFSPascal::NormalizePath(const char* path, char fssep,
char* normalizedBuf, int* pNormalizedBufLen)
{
DIError dierr = kDIErrNone;
char tmpBuf[A2FilePascal::kMaxFileName+1];
int len;
DoNormalizePath(path, fssep, tmpBuf);
len = strlen(tmpBuf)+1;
if (*pNormalizedBufLen < len)
dierr = kDIErrDataOverrun;
else
strcpy(normalizedBuf, tmpBuf);
*pNormalizedBufLen = len;
return dierr;
}
/*
* Normalize a Pascal pathname. Lower case becomes upper case, invalid
* characters get stripped.
*
* "outBuf" must be able to hold kMaxFileName+1 characters.
*/
void
DiskFSPascal::DoNormalizePath(const char* name, char fssep, char* outBuf)
{
char* outp = outBuf;
char* cp;
/* throw out leading pathname, if any */
if (fssep != '\0') {
cp = strrchr(name, fssep);
if (cp != nil)
name = cp+1;
}
while (*name != '\0' && (outp - outBuf) < A2FilePascal::kMaxFileName) {
if (*name > 0x20 && *name < 0x7f &&
strchr(kInvalidNameChars, *name) == nil)
{
*outp++ = toupper(*name);
}
name++;
}
*outp = '\0';
if (*outBuf == '\0') {
/* nothing left */
strcpy(outBuf, "BLANK");
}
}
/*
* Create an empty file. It doesn't look like pascal normally allows you
* to create a zero-block file, so we create a 1-block file and set the
* "data in last block" field to zero.
*
* We don't know how big the file will be, so we can't do a "best fit"
* algorithm for placement. Instead, we just put it in the largest
* available free space.
*
* NOTE: the Pascal system will auto-delete zero-byte files. It expects a
* brand-new 1-block file to have a "bytes remaining" of 512. The files
* we create here are expected to be written to, not used as filler, so
* this behavior is actually a *good* thing.
*/
DIError
DiskFSPascal::CreateFile(const CreateParms* pParms, A2File** ppNewFile)
{
DIError dierr = kDIErrNone;
const bool createUnique = (GetParameter(kParm_CreateUnique) != 0);
char normalName[A2FilePascal::kMaxFileName+1];
A2FilePascal* pNewFile = nil;
if (fpImg->GetReadOnly())
return kDIErrAccessDenied;
if (!fDiskIsGood)
return kDIErrBadDiskImage;
assert(pParms != nil);
assert(pParms->pathName != nil);
assert(pParms->storageType == A2FileProDOS::kStorageSeedling);
WMSG1(" Pascal ---v--- CreateFile '%s'\n", pParms->pathName);
/* compute maxFiles, which includes the vol dir header */
int maxFiles =
((fNextBlock - kVolHeaderBlock) * kBlkSize) / kDirectoryEntryLen;
if (fNumFiles >= maxFiles-1) {
WMSG1("Pascal volume directory full (%d entries)\n", fNumFiles);
return kDIErrVolumeDirFull;
}
*ppNewFile = nil;
DoNormalizePath(pParms->pathName, pParms->fssep, normalName);
/*
* See if the file already exists.
*
* If "create unique" is set, we append digits until the name doesn't
* match any others. The name will be modified in place.
*/
if (createUnique) {
MakeFileNameUnique(normalName);
} else {
if (GetFileByName(normalName) != nil) {
WMSG1(" Pascal create: normalized name '%s' already exists\n",
normalName);
dierr = kDIErrFileExists;
goto bail;
}
}
/*
* Find the largest gap in the file space.
*
* We get an index pointer and A2File pointer to the previous entry. If
* the blank space is at the head of the list, prevIdx will be zero and
* pPrevFile will be nil.
*/
A2FilePascal* pPrevFile;
int prevIdx;
dierr = FindLargestFreeArea(&prevIdx, &pPrevFile);
if (dierr != kDIErrNone)
goto bail;
assert(prevIdx >= 0);
/*
* Make a new entry.
*/
time_t now;
pNewFile = new A2FilePascal(this);
if (pNewFile == nil) {
dierr = kDIErrMalloc;
goto bail;
}
if (pPrevFile == nil)
pNewFile->fStartBlock = fNextBlock;
else
pNewFile->fStartBlock = pPrevFile->fNextBlock;
pNewFile->fNextBlock = pNewFile->fStartBlock +1; // alloc 1 block
pNewFile->fFileType = A2FilePascal::ConvertFileType(pParms->fileType);
memset(pNewFile->fFileName, 0, A2FilePascal::kMaxFileName);
strcpy(pNewFile->fFileName, normalName);
pNewFile->fBytesRemaining = 0;
now = time(nil);
pNewFile->fModWhen = A2FilePascal::ConvertPascalDate(now);
pNewFile->fLength = 0;
/*
* Make a hole.
*/
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
if (fNumFiles > prevIdx) {
WMSG1(" Pascal sliding last %d entries down a slot\n",
fNumFiles - prevIdx);
memmove(fDirectory + (prevIdx+2) * kDirectoryEntryLen,
fDirectory + (prevIdx+1) * kDirectoryEntryLen,
(fNumFiles - prevIdx) * kDirectoryEntryLen);
}
/*
* Fill the hole.
*/
unsigned char* dirPtr;
dirPtr = fDirectory + (prevIdx+1) * kDirectoryEntryLen;
PutShortLE(&dirPtr[0x00], pNewFile->fStartBlock);
PutShortLE(&dirPtr[0x02], pNewFile->fNextBlock);
PutShortLE(&dirPtr[0x04], (unsigned short) pNewFile->fFileType);
dirPtr[0x06] = (unsigned char) strlen(pNewFile->fFileName);
memcpy(&dirPtr[0x07], pNewFile->fFileName, A2FilePascal::kMaxFileName);
PutShortLE(&dirPtr[0x16], pNewFile->fBytesRemaining);
PutShortLE(&dirPtr[0x18], pNewFile->fModWhen);
/*
* Update the #of files.
*/
fNumFiles++;
PutShortLE(&fDirectory[0x10], fNumFiles);
/*
* Flush.
*/
dierr = SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
/*
* Add to the linear file list.
*/
InsertFileInList(pNewFile, pPrevFile);
*ppNewFile = pNewFile;
pNewFile = nil;
bail:
delete pNewFile;
FreeCatalog();
return dierr;
}
/*
* Make the name pointed to by "fileName" unique. The name should already
* be FS-normalized, and be in a buffer that can hold at least kMaxFileName+1
* bytes.
*
* (This is nearly identical to the code in the ProDOS implementation. I'd
* like to make it a general DiskFS function, but making the loop condition
* work requires setting up callbacks, which isn't hard here but is a little
* annoying in ProDOS because of the subdir buffer. So it's cut & paste
* for now.)
*
* Returns an error on failure, which should be impossible.
*/
DIError
DiskFSPascal::MakeFileNameUnique(char* fileName)
{
assert(fileName != nil);
assert(strlen(fileName) <= A2FilePascal::kMaxFileName);
if (GetFileByName(fileName) == nil)
return kDIErrNone;
WMSG1(" Pascal found duplicate of '%s', making unique\n", fileName);
int nameLen = strlen(fileName);
int dotOffset=0, dotLen=0;
char dotBuf[kMaxExtensionLen+1];
/* ensure the result will be null-terminated */
memset(fileName + nameLen, 0, (A2FilePascal::kMaxFileName - nameLen) +1);
/*
* If this has what looks like a filename extension, grab it. We want
* to preserve ".gif", ".c", etc.
*/
const char* cp = strrchr(fileName, '.');
if (cp != nil) {
int tmpOffset = cp - fileName;
if (tmpOffset > 0 && nameLen - tmpOffset <= kMaxExtensionLen) {
WMSG1(" Pascal (keeping extension '%s')\n", cp);
assert(strlen(cp) <= kMaxExtensionLen);
strcpy(dotBuf, cp);
dotOffset = tmpOffset;
dotLen = nameLen - dotOffset;
}
}
const int kMaxDigits = 999;
int digits = 0;
int digitLen;
int copyOffset;
char digitBuf[4];
do {
if (digits == kMaxDigits)
return kDIErrFileExists;
digits++;
/* not the most efficient way to do this, but it'll do */
sprintf(digitBuf, "%d", digits);
digitLen = strlen(digitBuf);
if (nameLen + digitLen > A2FilePascal::kMaxFileName)
copyOffset = A2FilePascal::kMaxFileName - dotLen - digitLen;
else
copyOffset = nameLen - dotLen;
memcpy(fileName + copyOffset, digitBuf, digitLen);
if (dotLen != 0)
memcpy(fileName + copyOffset + digitLen, dotBuf, dotLen);
} while (GetFileByName(fileName) != nil);
WMSG1(" Pascal converted to unique name: %s\n", fileName);
return kDIErrNone;
}
/*
* Find the largest chunk of free space on the disk.
*
* Returns the index to the directory entry of the file immediately before
* the chunk (where 0 is the directory header), and the corresponding
* A2File entry.
*
* If there's no free space left, returns kDIErrDiskFull.
*/
DIError
DiskFSPascal::FindLargestFreeArea(int *pPrevIdx, A2FilePascal** ppPrevFile)
{
A2FilePascal* pFile;
A2FilePascal* pPrevFile;
unsigned short prevNextBlock = fNextBlock;
int gapSize, maxGap, maxIndex, idx;
maxIndex = -1;
maxGap = 0;
idx = 0;
*ppPrevFile = pPrevFile = nil;
pFile = (A2FilePascal*) GetNextFile(nil);
while (pFile != nil) {
gapSize = pFile->fStartBlock - prevNextBlock;
if (gapSize > maxGap) {
maxGap = gapSize;
maxIndex = idx;
*ppPrevFile = pPrevFile;
}
idx++;
prevNextBlock = pFile->fNextBlock;
pPrevFile = pFile;
pFile = (A2FilePascal*) GetNextFile(pFile);
}
gapSize = fTotalBlocks - prevNextBlock;
if (gapSize > maxGap) {
maxGap = gapSize;
maxIndex = idx;
*ppPrevFile = pPrevFile;
}
WMSG3("Pascal largest gap after entry %d '%s' (size=%d)\n",
maxIndex,
*ppPrevFile != nil ? (*ppPrevFile)->GetPathName() : "(root)",
maxGap);
*pPrevIdx = maxIndex;
if (maxIndex < 0)
return kDIErrDiskFull;
return kDIErrNone;
}
/*
* Delete a file. Because Pascal doesn't have a block allocation map, this
* is a simple matter of crunching the directory entry out.
*/
DIError
DiskFSPascal::DeleteFile(A2File* pGenericFile)
{
DIError dierr = kDIErrNone;
A2FilePascal* pFile = (A2FilePascal*) pGenericFile;
unsigned char* pEntry;
int dirLen, offsetToNextEntry;
if (pGenericFile == nil) {
assert(false);
return kDIErrInvalidArg;
}
if (fpImg->GetReadOnly())
return kDIErrAccessDenied;
if (!fDiskIsGood)
return kDIErrBadDiskImage;
if (pGenericFile->IsFileOpen())
return kDIErrFileOpen;
WMSG1(" Pascal deleting '%s'\n", pFile->GetPathName());
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
pEntry = FindDirEntry(pFile);
if (pEntry == nil) {
assert(false);
dierr = kDIErrInternal;
goto bail;
}
dirLen = (fNumFiles+1) * kDirectoryEntryLen;
offsetToNextEntry = (pEntry - fDirectory) + kDirectoryEntryLen;
if (dirLen == offsetToNextEntry) {
WMSG0("+++ removing last entry\n");
} else {
memmove(pEntry, pEntry+kDirectoryEntryLen, dirLen - offsetToNextEntry);
}
assert(fNumFiles > 0);
fNumFiles--;
PutShortLE(&fDirectory[0x10], fNumFiles);
dierr = SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
/*
* Remove the A2File* from the list.
*/
DeleteFileFromList(pFile);
bail:
FreeCatalog();
return dierr;
}
/*
* Rename a file.
*/
DIError
DiskFSPascal::RenameFile(A2File* pGenericFile, const char* newName)
{
DIError dierr = kDIErrNone;
A2FilePascal* pFile = (A2FilePascal*) pGenericFile;
char normalName[A2FilePascal::kMaxFileName+1];
unsigned char* pEntry;
if (pFile == nil || newName == nil)
return kDIErrInvalidArg;
if (!IsValidFileName(newName))
return kDIErrInvalidArg;
if (fpImg->GetReadOnly())
return kDIErrAccessDenied;
if (!fDiskIsGood)
return kDIErrBadDiskImage;
/* not strictly necessary, but watch sanity check in Close/FindDirEntry */
if (pGenericFile->IsFileOpen())
return kDIErrFileOpen;
DoNormalizePath(newName, '\0', normalName);
WMSG2(" Pascal renaming '%s' to '%s'\n", pFile->GetPathName(), normalName);
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
pEntry = FindDirEntry(pFile);
if (pEntry == nil) {
assert(false);
dierr = kDIErrInternal;
goto bail;
}
pEntry[0x06] = strlen(normalName);
memcpy(&pEntry[0x07], normalName, A2FilePascal::kMaxFileName);
strcpy(pFile->fFileName, normalName);
dierr = SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
bail:
FreeCatalog();
return dierr;
}
/*
* Set file info.
*
* Pascal does not have an aux type or access flags. It has a file type,
* but we don't allow the full range of ProDOS types. Attempting to change
* to an unsupported type results in "PDA" being used.
*/
DIError
DiskFSPascal::SetFileInfo(A2File* pGenericFile, long fileType, long auxType,
long accessFlags)
{
DIError dierr = kDIErrNone;
A2FilePascal* pFile = (A2FilePascal*) pGenericFile;
unsigned char* pEntry;
if (pFile == nil)
return kDIErrInvalidArg;
if (fpImg->GetReadOnly())
return kDIErrAccessDenied;
if (!fDiskIsGood)
return kDIErrBadDiskImage;
WMSG2("Pascal SetFileInfo '%s' fileType=0x%04lx\n",
pFile->GetPathName(), fileType);
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
pEntry = FindDirEntry(pFile);
if (pEntry == nil) {
assert(false);
dierr = kDIErrInternal;
goto bail;
}
A2FilePascal::FileType newType;
newType = A2FilePascal::ConvertFileType(fileType);
PutShortLE(&pEntry[0x04], (unsigned short) newType);
dierr = SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
/* update our local copy */
pFile->fFileType = newType;
bail:
FreeCatalog();
return dierr;
}
/*
* Change the Pascal volume name.
*/
DIError
DiskFSPascal::RenameVolume(const char* newName)
{
DIError dierr = kDIErrNone;
char normalName[A2FilePascal::kMaxFileName+1];
if (!IsValidVolumeName(newName))
return kDIErrInvalidArg;
if (fpImg->GetReadOnly())
return kDIErrAccessDenied;
DoNormalizePath(newName, '\0', normalName);
dierr = LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
fDirectory[0x06] = strlen(normalName);
memcpy(&fDirectory[0x07], normalName, fDirectory[0x06]);
strcpy(fVolumeName, normalName);
SetVolumeID();
dierr = SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
bail:
FreeCatalog();
return dierr;
}
/*
* Find "pFile" in "fDirectory".
*/
unsigned char*
DiskFSPascal::FindDirEntry(A2FilePascal* pFile)
{
unsigned char* ptr;
int i;
assert(fDirectory != nil);
ptr = fDirectory; // volume header; first iteration skips over it
for (i = 0; i < fNumFiles; i++) {
ptr += kDirectoryEntryLen;
if (GetShortLE(&ptr[0x00]) == pFile->fStartBlock) {
if (memcmp(&ptr[0x07], pFile->fFileName, ptr[0x06]) != 0) {
assert(false);
WMSG2("name/block mismatch on '%s' %d\n",
pFile->GetPathName(), pFile->fStartBlock);
return nil;
}
return ptr;
}
}
return nil;
}
/*
* ===========================================================================
* A2FilePascal
* ===========================================================================
*/
/*
* Convert Pascal file type to ProDOS file type.
*/
long
A2FilePascal::GetFileType(void) const
{
switch (fFileType) {
case kTypeUntyped: return 0x00; // NON
case kTypeXdsk: return 0x01; // BAD (was 0xf2 in v1.2.2)
case kTypeCode: return 0x02; // PCD
case kTypeText: return 0x03; // PTX
case kTypeInfo: return 0xf3; // no idea
case kTypeData: return 0x05; // PDA
case kTypeGraf: return 0xf4; // no idea
case kTypeFoto: return 0x08; // FOT
case kTypeSecurdir: return 0xf5; // no idea
default:
WMSG1("Pascal WARNING: found invalid file type %d\n", fFileType);
return 0;
}
}
/*
* Convert a ProDOS file type to a Pascal file type.
*/
/*static*/ A2FilePascal::FileType
A2FilePascal::ConvertFileType(long prodosType)
{
FileType newType;
switch (prodosType) {
case 0x00: newType = kTypeUntyped; break; // NON
case 0x01: newType = kTypeXdsk; break; // BAD
case 0x02: newType = kTypeCode; break; // PCD
case 0x03: newType = kTypeText; break; // PTX
case 0xf3: newType = kTypeInfo; break; // ?
case 0x05: newType = kTypeData; break; // PDA
case 0xf4: newType = kTypeGraf; break; // ?
case 0x08: newType = kTypeFoto; break; // FOT
case 0xf5: newType = kTypeSecurdir; break; // ?
default: newType = kTypeData; break; // PDA for generic
}
return newType;
}
/*
* Convert from Pascal compact date format to a time_t.
*
* Format yyyyyyydddddmmmm
* Month 0..12 (0 indicates invalid date)
* Day 0..31
* Year 0..100 (1900-1999; 100 will be rejected)
*
* We follow the ProDOS protocol of "year < 40 == 1900 + year". We could
* probably make that 1970, but the time_t epoch ends before then.
*
* The Pascal Filer uses a special date with the year 100 in it to indicate
* file updates in progress. If the system comes up and sees a file with
* the year 100, it will assume that the file was created shortly before the
* system crashed, and will remove the file.
*/
/*static*/ time_t
A2FilePascal::ConvertPascalDate(PascalDate pascalDate)
{
int year, month, day;
month = pascalDate & 0x0f;
if (!month)
return 0;
day = (pascalDate >> 4) & 0x1f;
year = (pascalDate >> 9) & 0x7f;
if (year == 100) {
// ought to mark the file as "suspicious"?
WMSG0("Pascal WARNING: date with year=100\n");
}
if (year < 40)
year += 100;
struct tm tmbuf;
time_t when;
tmbuf.tm_sec = 0;
tmbuf.tm_min = 0;
tmbuf.tm_hour = 0;
tmbuf.tm_mday = day;
tmbuf.tm_mon = month-1;
tmbuf.tm_year = year;
tmbuf.tm_wday = 0;
tmbuf.tm_yday = 0;
tmbuf.tm_isdst = -1; // let it figure DST and time zone
when = mktime(&tmbuf);
if (when == (time_t) -1)
when = 0;
return when;
}
/*
* Convert a time_t to a Pascal-format date.
*
* CiderPress uses kDateInvalid==-1 and kDateNone==-2.
*/
/*static*/ A2FilePascal::PascalDate
A2FilePascal::ConvertPascalDate(time_t unixDate)
{
unsigned long date, year;
struct tm* ptm;
if (unixDate == 0 || unixDate == -1 || unixDate == -2)
return 0;
ptm = localtime(&unixDate);
if (ptm == nil)
return 0; // must've been invalid or unspecified
year = ptm->tm_year; // years since 1900
if (year >= 100)
year -= 100;
if (year < 0 || year >= 100) {
WMSG2("WHOOPS: got year %lu from %d\n", year, ptm->tm_year);
year = 70;
}
date = year << 9 | (ptm->tm_mon+1) | ptm->tm_mday << 4;
return (PascalDate) date;
}
/*
* Return the file modification date.
*/
time_t
A2FilePascal::GetModWhen(void) const
{
return ConvertPascalDate(fModWhen);
}
/*
* Dump the contents of the A2File structure.
*/
void
A2FilePascal::Dump(void) const
{
WMSG1("A2FilePascal '%s'\n", fFileName);
WMSG3(" start=%d next=%d type=%d\n",
fStartBlock, fNextBlock, fFileType);
WMSG2(" bytesRem=%d modWhen=0x%04x\n",
fBytesRemaining, fModWhen);
}
/*
* Not a whole lot to do, since there's no fancy index blocks.
*/
DIError
A2FilePascal::Open(A2FileDescr** ppOpenFile, bool readOnly,
bool rsrcFork /*=false*/)
{
A2FDPascal* pOpenFile = nil;
if (!readOnly) {
if (fpDiskFS->GetDiskImg()->GetReadOnly())
return kDIErrAccessDenied;
if (fpDiskFS->GetFSDamaged())
return kDIErrBadDiskImage;
}
if (fpOpenFile != nil)
return kDIErrAlreadyOpen;
if (rsrcFork)
return kDIErrForkNotFound;
pOpenFile = new A2FDPascal(this);
pOpenFile->fOffset = 0;
pOpenFile->fOpenEOF = fLength;
pOpenFile->fOpenBlocksUsed = fNextBlock - fStartBlock;
pOpenFile->fModified = false;
fpOpenFile = pOpenFile;
*ppOpenFile = pOpenFile;
return kDIErrNone;
}
/*
* ===========================================================================
* A2FDPascal
* ===========================================================================
*/
/*
* Read a chunk of data from the current offset.
*/
DIError
A2FDPascal::Read(void* buf, size_t len, size_t* pActual)
{
WMSG3(" Pascal reading %d bytes from '%s' (offset=%ld)\n",
len, fpFile->GetPathName(), (long) fOffset);
A2FilePascal* pFile = (A2FilePascal*) fpFile;
/* don't allow them to read past the end of the file */
if (fOffset + (long)len > fOpenEOF) {
if (pActual == nil)
return kDIErrDataUnderrun;
len = (size_t) (fOpenEOF - fOffset);
}
if (pActual != nil)
*pActual = len;
long incrLen = len;
DIError dierr = kDIErrNone;
unsigned char blkBuf[kBlkSize];
long block = pFile->fStartBlock + (long) (fOffset / kBlkSize);
int bufOffset = (long) (fOffset % kBlkSize); // (& 0x01ff)
size_t thisCount;
if (len == 0)
return kDIErrNone;
assert(fOpenEOF != 0);
while (len) {
assert(block >= pFile->fStartBlock && block < pFile->fNextBlock);
dierr = pFile->GetDiskFS()->GetDiskImg()->ReadBlock(block, blkBuf);
if (dierr != kDIErrNone) {
WMSG1(" Pascal error reading file '%s'\n", pFile->fFileName);
return dierr;
}
thisCount = kBlkSize - bufOffset;
if (thisCount > len)
thisCount = len;
memcpy(buf, blkBuf + bufOffset, thisCount);
len -= thisCount;
buf = (char*)buf + thisCount;
bufOffset = 0;
block++;
}
fOffset += incrLen;
return dierr;
}
/*
* Write data at the current offset.
*
* We make the customary assumptions here: we're writing to a brand-new file,
* and writing all data in one shot. On a Pascal disk, that makes this
* process almost embarrassingly simple.
*/
DIError
A2FDPascal::Write(const void* buf, size_t len, size_t* pActual)
{
DIError dierr = kDIErrNone;
A2FilePascal* pFile = (A2FilePascal*) fpFile;
DiskFSPascal* pDiskFS = (DiskFSPascal*) fpFile->GetDiskFS();
unsigned char blkBuf[kBlkSize];
size_t origLen = len;
WMSG2(" DOS Write len=%u %s\n", len, pFile->GetPathName());
if (len >= 0x01000000) { // 16MB
assert(false);
return kDIErrInvalidArg;
}
assert(fOffset == 0); // big simplifying assumption
assert(fOpenEOF == 0); // another one
assert(fOpenBlocksUsed == 1);
assert(buf != nil);
/*
* Verify that there's enough room between this file and the next to
* hold the contents of the file.
*/
long blocksNeeded, blocksAvail;
A2FilePascal* pNextFile;
pNextFile = (A2FilePascal*) pDiskFS->GetNextFile(pFile);
if (pNextFile == nil)
blocksAvail = pDiskFS->GetTotalBlocks() - pFile->fStartBlock;
else
blocksAvail = pNextFile->fStartBlock - pFile->fStartBlock;
blocksNeeded = (len + kBlkSize -1) / kBlkSize;
WMSG4("Pascal write '%s' %d bytes: avail=%ld needed=%ld\n",
pFile->GetPathName(), len, blocksAvail, blocksNeeded);
if (blocksAvail < blocksNeeded)
return kDIErrDiskFull;
/*
* Write the data.
*/
long block;
block = pFile->fStartBlock;
while (len != 0) {
if (len >= (size_t) kBlkSize) {
/* full block write */
dierr = pDiskFS->GetDiskImg()->WriteBlock(block, buf);
if (dierr != kDIErrNone)
goto bail;
len -= kBlkSize;
buf = (unsigned char*) buf + kBlkSize;
} else {
/* partial block write */
memset(blkBuf, 0, sizeof(blkBuf));
memcpy(blkBuf, buf, len);
dierr = pDiskFS->GetDiskImg()->WriteBlock(block, blkBuf);
if (dierr != kDIErrNone)
goto bail;
len = 0;
}
block++;
}
/*
* Update FD state.
*/
fOpenBlocksUsed = blocksNeeded;
fOpenEOF = origLen;
fOffset = origLen;
fModified = true;
bail:
return dierr;
}
/*
* Seek to a new offset.
*/
DIError
A2FDPascal::Seek(di_off_t offset, DIWhence whence)
{
//di_off_t fileLen = ((A2FilePascal*) fpFile)->fLength;
switch (whence) {
case kSeekSet:
if (offset < 0 || offset > fOpenEOF)
return kDIErrInvalidArg;
fOffset = offset;
break;
case kSeekEnd:
if (offset > 0 || offset < -fOpenEOF)
return kDIErrInvalidArg;
fOffset = fOpenEOF + offset;
break;
case kSeekCur:
if (offset < -fOffset ||
offset >= (fOpenEOF - fOffset))
{
return kDIErrInvalidArg;
}
fOffset += offset;
break;
default:
assert(false);
return kDIErrInvalidArg;
}
assert(fOffset >= 0 && fOffset <= fOpenEOF);
return kDIErrNone;
}
/*
* Return current offset.
*/
di_off_t
A2FDPascal::Tell(void)
{
return fOffset;
}
/*
* Release file state, and tell our parent to destroy us.
*
* Most applications don't check the value of "Close", or call it from a
* destructor, so we call CloseDescr whether we succeed or not.
*/
DIError
A2FDPascal::Close(void)
{
DIError dierr = kDIErrNone;
DiskFSPascal* pDiskFS = (DiskFSPascal*) fpFile->GetDiskFS();
if (fModified) {
A2FilePascal* pFile = (A2FilePascal*) fpFile;
unsigned char* pEntry;
dierr = pDiskFS->LoadCatalog();
if (dierr != kDIErrNone)
goto bail;
/*
* Update our internal copies of stuff.
*/
pFile->fLength = fOpenEOF;
pFile->fNextBlock = pFile->fStartBlock + (unsigned short) fOpenBlocksUsed;
pFile->fModWhen = A2FilePascal::ConvertPascalDate(time(nil));
/*
* Update the "next block" value and the length-in-last-block. We
* have to scan through the directory to find our entry, rather
* than remember an offset at "open" time, on the off chance that
* somebody created or deleted a file after we were opened.
*/
pEntry = pDiskFS->FindDirEntry(pFile);
if (pEntry == nil) {
// we deleted an open file?
assert(false);
dierr = kDIErrInternal;
goto bail;
}
unsigned short bytesInLastBlock;
bytesInLastBlock = (unsigned short)pFile->fLength % kBlkSize;
if (bytesInLastBlock == 0)
bytesInLastBlock = 512; // exactly filled out last block
PutShortLE(&pEntry[0x02], pFile->fNextBlock);
PutShortLE(&pEntry[0x16], bytesInLastBlock);
PutShortLE(&pEntry[0x18], pFile->fModWhen);
dierr = pDiskFS->SaveCatalog();
if (dierr != kDIErrNone)
goto bail;
}
bail:
pDiskFS->FreeCatalog();
fpFile->CloseDescr(this);
return dierr;
}
/*
* Return the #of sectors/blocks in the file.
*/
long
A2FDPascal::GetSectorCount(void) const
{
A2FilePascal* pFile = (A2FilePascal*) fpFile;
return (pFile->fNextBlock - pFile->fStartBlock) * 2;
}
long
A2FDPascal::GetBlockCount(void) const
{
A2FilePascal* pFile = (A2FilePascal*) fpFile;
return pFile->fNextBlock - pFile->fStartBlock;
}
/*
* Return the Nth track/sector in this file.
*/
DIError
A2FDPascal::GetStorage(long sectorIdx, long* pTrack, long* pSector) const
{
A2FilePascal* pFile = (A2FilePascal*) fpFile;
long pascalIdx = sectorIdx / 2;
long pascalBlock = pFile->fStartBlock + pascalIdx;
if (pascalBlock >= pFile->fNextBlock)
return kDIErrInvalidIndex;
/* sparse blocks not possible on Pascal volumes */
BlockToTrackSector(pascalBlock, (sectorIdx & 0x01) != 0, pTrack, pSector);
return kDIErrNone;
}
/*
* Return the Nth 512-byte block in this file.
*/
DIError
A2FDPascal::GetStorage(long blockIdx, long* pBlock) const
{
A2FilePascal* pFile = (A2FilePascal*) fpFile;
long pascalBlock = pFile->fStartBlock + blockIdx;
if (pascalBlock >= pFile->fNextBlock)
return kDIErrInvalidIndex;
*pBlock = pascalBlock;
assert(*pBlock < pFile->GetDiskFS()->GetDiskImg()->GetNumBlocks());
return kDIErrNone;
}
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