mirror of
https://github.com/fadden/ciderpress.git
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f6647b9978
Mostly a bulk conversion of debug messages, primarily with sed: sed -e 's/\(WMSG[0-9]\)\(.*\)\(\\n"\)/LOGI\2"/' This removes the '\n' from the end of the log messages, and sets them all to "info" severity. We want to prefix each line with file/line and/or a timestamp, so it doesn't make sense to have a partial line, and there's no value in embedding the '\n' in every string.
672 lines
18 KiB
C++
672 lines
18 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2009 by CiderPress authors. All Rights Reserved.
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* See the file LICENSE for distribution terms.
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*/
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/*
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* Implementation of DiskFSGutenberg and A2FileGutenberg classes.
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*
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*/
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#include "StdAfx.h"
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#include "DiskImgPriv.h"
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/*
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* ===========================================================================
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* DiskFSGutenberg
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* ===========================================================================
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*/
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const int kMaxSectors = 32;
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const int kMaxVolNameLen = 9;
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const int kSctSize = 256;
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const int kVTOCTrack = 17;
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const int kVTOCSector = 7;
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const int kCatalogEntryOffset = 0x20; // first entry in cat sect starts here
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const int kCatalogEntrySize = 16; // length in bytes of catalog entries
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const int kCatalogEntriesPerSect = 15; // #of entries per catalog sector
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const int kEntryDeleted = 0x40; // this is used to designate deleted files
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const int kEntryUnused = 0x00; // this is track# in never-used entries
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const int kMaxTSPairs = 0x7a; // 122 entries for 256-byte sectors
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const int kTSOffset = 0x0c; // first T/S entry in a T/S list
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const int kMaxTSIterations = 32;
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/*
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* Get a pointer to the Nth entry in a catalog sector.
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*/
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static inline unsigned char*
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GetCatalogEntryPtr(unsigned char* basePtr, int entryNum)
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{
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assert(entryNum >= 0 && entryNum < kCatalogEntriesPerSect);
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return basePtr + kCatalogEntryOffset + entryNum * kCatalogEntrySize;
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}
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/*
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* Test this image for Gutenberg-ness.
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*
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*/
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static DIError
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TestImage(DiskImg* pImg, DiskImg::SectorOrder imageOrder, int* pGoodCount)
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{
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DIError dierr = kDIErrNone;
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unsigned char sctBuf[kSctSize];
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// int numTracks, numSectors;
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int catTrack = kVTOCTrack;
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int catSect = kVTOCSector;
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int foundGood = 0;
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int iterations = 0;
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*pGoodCount = 0;
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/*
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* Walk through the catalog track to try to figure out ordering.
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*/
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while (iterations < DiskFSGutenberg::kMaxCatalogSectors)
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{
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dierr = pImg->ReadTrackSectorSwapped(catTrack, catSect, sctBuf,
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imageOrder, DiskImg::kSectorOrderDOS);
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if (dierr != kDIErrNone) {
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dierr = kDIErrNone;
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break; /* allow it if earlier stuff was okay */
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}
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if (catTrack == sctBuf[0] && catSect == sctBuf[1]) {
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foundGood++;
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if (sctBuf[0x0f] == 0x8d && sctBuf[0x1f] == 0x8d &&
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sctBuf[0x2f] == 0x8d && sctBuf[0x3f] == 0x8d &&
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sctBuf[0x4f] == 0x8d && sctBuf[0x5f] == 0x8d &&
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sctBuf[0x6f] == 0x8d && sctBuf[0x7f] == 0x8d &&
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sctBuf[0x8f] == 0x8d && sctBuf[0x9f] == 0x8d)
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foundGood++;
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}
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else if (catTrack >0x80) {
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LOGI(" Gutenberg detected end-of-catalog on cat (%d,%d)",
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catTrack, catSect);
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break;
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}
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catTrack = sctBuf[0x04];
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catSect = sctBuf[0x05];
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iterations++; // watch for infinite loops
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}
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if (iterations >= DiskFSGutenberg::kMaxCatalogSectors) {
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/* possible cause: LF->CR conversion screws up link to sector $0a */
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dierr = kDIErrDirectoryLoop;
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LOGI(" Gutenberg directory links cause a loop (order=%d)", imageOrder);
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goto bail;
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}
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LOGI(" Gutenberg foundGood=%d order=%d", foundGood, imageOrder);
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*pGoodCount = foundGood;
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bail:
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return dierr;
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}
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/*
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* Test to see if the image is a Gutenberg word processor data disk.
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*/
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/*static*/ DIError
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DiskFSGutenberg::TestFS(DiskImg* pImg, DiskImg::SectorOrder* pOrder,
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DiskImg::FSFormat* pFormat, FSLeniency leniency)
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{
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if (pImg->GetNumTracks() > kMaxInterestingTracks)
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return kDIErrFilesystemNotFound;
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DiskImg::SectorOrder ordering[DiskImg::kSectorOrderMax];
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DiskImg::GetSectorOrderArray(ordering, *pOrder);
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DiskImg::SectorOrder bestOrder = DiskImg::kSectorOrderUnknown;
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int bestCount = 0;
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for (int i = 0; i < DiskImg::kSectorOrderMax; i++) {
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int goodCount = 0;
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if (ordering[i] == DiskImg::kSectorOrderUnknown)
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continue;
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if (TestImage(pImg, ordering[i], &goodCount) == kDIErrNone) {
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if (goodCount > bestCount) {
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bestCount = goodCount;
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bestOrder = ordering[i];
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}
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}
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}
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if (bestCount >= 2 ||
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(leniency == kLeniencyVery && bestCount >= 1))
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{
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LOGI(" Gutenberg test: bestCount=%d for order=%d", bestCount, bestOrder);
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assert(bestOrder != DiskImg::kSectorOrderUnknown);
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*pOrder = bestOrder;
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*pFormat = DiskImg::kFormatGutenberg;
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return kDIErrNone;
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}
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LOGI(" Gutenberg didn't find a valid filesystem.");
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return kDIErrFilesystemNotFound;
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}
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/*
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* Get things rolling.
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*
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* Since we're assured that this is a valid disk, errors encountered from here
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* on out must be handled somehow, possibly by claiming that the disk is
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* completely full and has no files on it.
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*/
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DIError
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DiskFSGutenberg::Initialize(InitMode initMode)
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{
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DIError dierr = kDIErrNone;
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fVolumeUsage.Create(fpImg->GetNumTracks(), fpImg->GetNumSectPerTrack());
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/* read the contents of the catalog, creating our A2File list */
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dierr = ReadCatalog();
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if (dierr != kDIErrNone)
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goto bail;
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/* run through and get file lengths and data offsets */
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dierr = GetFileLengths();
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if (dierr != kDIErrNone)
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goto bail;
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sprintf(fDiskVolumeID, "Gutenberg: %s\0", fDiskVolumeName);
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fDiskIsGood = CheckDiskIsGood();
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fVolumeUsage.Dump();
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bail:
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return dierr;
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}
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/*
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* Get the amount of free space remaining.
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*/
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DIError
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DiskFSGutenberg::GetFreeSpaceCount(long* pTotalUnits, long* pFreeUnits,
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int* pUnitSize) const
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{
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*pTotalUnits = fpImg->GetNumTracks() * fpImg->GetNumSectPerTrack();
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*pFreeUnits = 0;
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*pUnitSize = kSectorSize;
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return kDIErrNone;
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}
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/*
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* Read the disk's catalog.
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*
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*/
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DIError
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DiskFSGutenberg::ReadCatalog(void)
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{
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DIError dierr = kDIErrNone;
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unsigned char sctBuf[kSctSize];
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int catTrack, catSect;
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int iterations;
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catTrack = 17;
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catSect = 7;
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iterations = 0;
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memset(fCatalogSectors, 0, sizeof(fCatalogSectors));
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while (catTrack < 35 && catSect < 16 && iterations < kMaxCatalogSectors)
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{
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LOGI(" Gutenberg reading catalog sector T=%d S=%d", catTrack, catSect);
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dierr = fpImg->ReadTrackSector(catTrack, catSect, sctBuf);
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if (dierr != kDIErrNone)
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goto bail;
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memcpy(fDiskVolumeName, &sctBuf[6], kMaxVolNameLen); // Copy out the volume name; it should be the same on all catalog sectors.
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fDiskVolumeName[kMaxVolNameLen] = 0x00;
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DiskFSGutenberg::LowerASCII((unsigned char*)fDiskVolumeName, kMaxVolNameLen);
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A2FileGutenberg::TrimTrailingSpaces(fDiskVolumeName);
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dierr = ProcessCatalogSector(catTrack, catSect, sctBuf);
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if (dierr != kDIErrNone)
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goto bail;
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fCatalogSectors[iterations].track = catTrack;
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fCatalogSectors[iterations].sector = catSect;
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catTrack = sctBuf[0x04];
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catSect = sctBuf[0x05];
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iterations++; // watch for infinite loops
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}
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if (iterations >= kMaxCatalogSectors) {
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dierr = kDIErrDirectoryLoop;
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goto bail;
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}
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bail:
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return dierr;
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}
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/*
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* Process the list of files in one sector of the catalog.
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*
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* Pass in the track, sector, and the contents of that track and sector.
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* (We only use "catTrack" and "catSect" to fill out some fields.)
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*/
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DIError
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DiskFSGutenberg::ProcessCatalogSector(int catTrack, int catSect,
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const unsigned char* sctBuf)
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{
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A2FileGutenberg* pFile;
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const unsigned char* pEntry;
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int i;
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pEntry = &sctBuf[kCatalogEntryOffset];
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for (i = 0; i < kCatalogEntriesPerSect; i++) {
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if (pEntry[0x0d] != kEntryDeleted && pEntry[0x00] != 0xa0 && pEntry[0x00] != 0x00) {
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pFile = new A2FileGutenberg(this);
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pFile->SetQuality(A2File::kQualityGood);
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pFile->fTrack = pEntry[0x0c];
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pFile->fSector = pEntry[0x0d];
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memcpy(pFile->fFileName, &pEntry[0x00], A2FileGutenberg::kMaxFileName);
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pFile->fFileName[A2FileGutenberg::kMaxFileName] = '\0';
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pFile->FixFilename();
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//pFile->fCatTS.track = catTrack;
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//pFile->fCatTS.sector = catSect;
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pFile->fCatEntryNum = i;
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/* can't do these yet, so just set to defaults */
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pFile->fLength = 0;
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pFile->fSparseLength = 0;
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pFile->fDataOffset = 0;
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pFile->fLengthInSectors = 0;
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pFile->fLengthInSectors = 0;
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AddFileToList(pFile);
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}
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//if (pEntry[0x00] == 0xa0)
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// break;
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pEntry += kCatalogEntrySize;
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}
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return kDIErrNone;
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}
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/*
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* Perform consistency checks on the filesystem.
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*
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* Returns "true" if disk appears to be perfect, "false" otherwise.
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*/
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bool
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DiskFSGutenberg::CheckDiskIsGood(void)
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{
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bool result = true;
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return result;
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}
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/*
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* Run through our list of files, computing the lengths and marking file
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* usage in the VolumeUsage object.
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*/
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DIError
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DiskFSGutenberg::GetFileLengths(void)
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{
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A2FileGutenberg* pFile;
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unsigned char sctBuf[kSctSize];
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int tsCount = 0;
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unsigned short currentTrack, currentSector;
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pFile = (A2FileGutenberg*) GetNextFile(NULL);
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while (pFile != NULL) {
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DIError dierr;
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tsCount = 0;
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currentTrack = pFile->fTrack;
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currentSector = pFile->fSector;
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while (currentTrack < 0x80) {
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tsCount ++;
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dierr = fpImg->ReadTrackSector(currentTrack, currentSector, sctBuf);
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if (dierr != kDIErrNone) {
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LOGI("Gutenberg failed loading track/sector for '%s'",
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pFile->GetPathName());
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goto bail;
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}
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currentTrack = sctBuf[0x04];
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currentSector = sctBuf[0x05];
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}
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pFile->fLengthInSectors = tsCount;
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pFile->fLength = tsCount * 250; // First six bytes of sector are t/s pointers
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pFile = (A2FileGutenberg*) GetNextFile(pFile);
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}
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bail:
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return kDIErrNone;
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}
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/*
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* Convert high ASCII to low ASCII.
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*
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* Some people put inverse and flashing text into filenames, not to mention
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* control characters, so we have to cope with those too.
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*
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* We modify the first "len" bytes of "buf" in place.
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*/
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/*static*/ void
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DiskFSGutenberg::LowerASCII(unsigned char* buf, long len)
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{
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while (len--) {
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if (*buf & 0x80) {
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if (*buf >= 0xa0)
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*buf &= 0x7f;
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else
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*buf = (*buf & 0x7f) + 0x20;
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} else
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*buf = ((*buf & 0x3f) ^ 0x20) + 0x20;
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buf++;
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}
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}
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/*
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* ===========================================================================
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* A2FileGutenberg
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* ===========================================================================
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*/
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/*
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* Constructor.
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*/
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A2FileGutenberg::A2FileGutenberg(DiskFS* pDiskFS) : A2File(pDiskFS)
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{
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fTrack = -1;
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fSector = -1;
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fLengthInSectors = 0;
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fLocked = true;
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fFileName[0] = '\0';
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fFileType = kTypeText;
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fCatTS.track = fCatTS.sector = 0;
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fCatEntryNum = -1;
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fAuxType = 0;
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fDataOffset = 0;
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fLength = -1;
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fSparseLength = -1;
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fpOpenFile = NULL;
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}
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/*
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* Destructor. Make sure an "open" file gets "closed".
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*/
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A2FileGutenberg::~A2FileGutenberg(void)
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{
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delete fpOpenFile;
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}
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/*
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* Convert the filetype enum to a ProDOS type.
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*
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*/
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long
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A2FileGutenberg::GetFileType(void) const
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{
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return 0x04; // TXT;
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}
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/*
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* "Fix" a filename. Convert DOS-ASCII to normal ASCII, and strip
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* trailing spaces.
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*/
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void
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A2FileGutenberg::FixFilename(void)
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{
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DiskFSGutenberg::LowerASCII((unsigned char*)fFileName, kMaxFileName);
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TrimTrailingSpaces(fFileName);
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}
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/*
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* Trim the spaces off the end of a filename.
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*
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* Assumes the filename has already been converted to low ASCII.
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*/
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/*static*/ void
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A2FileGutenberg::TrimTrailingSpaces(char* filename)
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{
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char* lastspc = filename + strlen(filename);
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assert(*lastspc == '\0');
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while (--lastspc) {
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if (*lastspc != ' ')
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break;
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}
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*(lastspc+1) = '\0';
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}
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/*
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* Encode a filename into high ASCII, padded out with spaces to
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* kMaxFileName chars. Lower case is converted to upper case. This
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* does not filter out control characters or other chunk.
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*
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* "buf" must be able to hold kMaxFileName+1 chars.
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*/
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/*static*/ void
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A2FileGutenberg::MakeDOSName(char* buf, const char* name)
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{
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for (int i = 0; i < kMaxFileName; i++) {
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if (*name == '\0')
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*buf++ = (char) 0xa0;
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else
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*buf++ = toupper(*name++) | 0x80;
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}
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*buf = '\0';
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}
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/*
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* Set up state for this file.
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*/
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DIError
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A2FileGutenberg::Open(A2FileDescr** ppOpenFile, bool readOnly,
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bool rsrcFork /*=false*/)
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{
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DIError dierr = kDIErrNone;
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A2FDGutenberg* pOpenFile = NULL;
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if (!readOnly) {
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if (fpDiskFS->GetDiskImg()->GetReadOnly())
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return kDIErrAccessDenied;
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if (fpDiskFS->GetFSDamaged())
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return kDIErrBadDiskImage;
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}
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if (fpOpenFile != NULL) {
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dierr = kDIErrAlreadyOpen;
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goto bail;
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}
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if (rsrcFork)
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return kDIErrForkNotFound;
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pOpenFile = new A2FDGutenberg(this);
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pOpenFile->fOffset = 0;
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pOpenFile->fOpenEOF = fLength;
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pOpenFile->fOpenSectorsUsed = fLengthInSectors;
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fpOpenFile = pOpenFile; // add it to our single-member "open file set"
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*ppOpenFile = pOpenFile;
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pOpenFile = NULL;
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bail:
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delete pOpenFile;
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return dierr;
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}
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/*
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* Dump the contents of an A2FileGutenberg.
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*/
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void
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A2FileGutenberg::Dump(void) const
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{
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LOGI("A2FileGutenberg '%s'", fFileName);
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LOGI(" TS T=%-2d S=%-2d", fTrack, fSector);
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LOGI(" Cat T=%-2d S=%-2d", fCatTS.track, fCatTS.sector);
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LOGI(" type=%d lck=%d slen=%d", fFileType, fLocked, fLengthInSectors);
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LOGI(" auxtype=0x%04x length=%ld",
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fAuxType, (long) fLength);
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}
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/*
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* ===========================================================================
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* A2FDGutenberg
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* ===========================================================================
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*/
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/*
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* Read data from the current offset.
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*
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*/
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DIError
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A2FDGutenberg::Read(void* buf, size_t len, size_t* pActual)
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{
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LOGI(" Gutenberg reading %d bytes from '%s' (offset=%ld)",
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len, fpFile->GetPathName(), (long) fOffset);
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A2FileGutenberg* pFile = (A2FileGutenberg*) fpFile;
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DIError dierr = kDIErrNone;
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unsigned char sctBuf[kSctSize];
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short currentTrack, currentSector;
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di_off_t actualOffset = fOffset + pFile->fDataOffset; // adjust for embedded len
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int bufOffset = 6;
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size_t thisCount;
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if (len == 0)
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return kDIErrNone;
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assert(fOpenEOF != 0);
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currentTrack = pFile->fTrack;
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currentSector = pFile->fSector;
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/* could be more clever in here and avoid double-buffering */
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while (len) {
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dierr = pFile->GetDiskFS()->GetDiskImg()->ReadTrackSector(
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currentTrack,
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currentSector,
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sctBuf);
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if (dierr != kDIErrNone) {
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LOGI(" Gutenberg error reading file '%s'", pFile->GetPathName());
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return dierr;
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}
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thisCount = kSctSize - bufOffset;
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if (thisCount > len)
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thisCount = len;
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memcpy(buf, sctBuf + bufOffset, thisCount);
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len -= thisCount;
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buf = (char*)buf + thisCount;
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currentTrack = sctBuf[0x04];
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currentSector = sctBuf[0x05];
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}
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return dierr;
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}
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/*
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* Writing Gutenberg files isn't supported.
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*
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*/
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DIError
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A2FDGutenberg::Write(const void* buf, size_t len, size_t* pActual)
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{
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return kDIErrNotSupported;
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}
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/*
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* Seek to the specified offset.
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*/
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DIError
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A2FDGutenberg::Seek(di_off_t offset, DIWhence whence)
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{
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return kDIErrNotSupported;
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}
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/*
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* Return current offset.
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*/
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di_off_t
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A2FDGutenberg::Tell(void)
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{
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return kDIErrNotSupported;
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}
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/*
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* Release file state.
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*
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* If the file was modified, we need to update the sector usage count in
|
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* the catalog track, and possibly a length word in the first sector of
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* the file (for A/I/B).
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*
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* Given the current "write all at once" implementation of Write, we could
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* have handled the length word back when initially writing the data, but
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* someday we may fix that and I don't want to have to rewrite this part.
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*
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* Most applications don't check the value of "Close", or call it from a
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* destructor, so we call CloseDescr whether we succeed or not.
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*/
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DIError
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A2FDGutenberg::Close(void)
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{
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DIError dierr = kDIErrNone;
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fpFile->CloseDescr(this);
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return dierr;
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}
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/*
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* Return the #of sectors/blocks in the file.
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*/
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long
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A2FDGutenberg::GetSectorCount(void) const
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{
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return fTSCount;
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}
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long
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A2FDGutenberg::GetBlockCount(void) const
|
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{
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return (fTSCount+1)/2;
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}
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/*
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|
* Return the Nth track/sector in this file.
|
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*
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* Returns (0,0) for a sparse sector.
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*/
|
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DIError
|
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A2FDGutenberg::GetStorage(long sectorIdx, long* pTrack, long* pSector) const
|
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{
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return kDIErrInvalidIndex;
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}
|
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/*
|
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* Unimplemented
|
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*/
|
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DIError
|
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A2FDGutenberg::GetStorage(long blockIdx, long* pBlock) const
|
|
{
|
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return kDIErrInvalidIndex;
|
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}
|