223 lines
8.0 KiB
C++
223 lines
8.0 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2007 by faddenSoft, LLC. 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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* AppleLink Compression Utility archive support.
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*/
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#ifndef APP_ACUARCHIVE_H
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#define APP_ACUARCHIVE_H
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#include "GenericArchive.h"
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class AcuArchive;
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/*
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* One file in an ACU archive.
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*/
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class AcuEntry : public GenericEntry {
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public:
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AcuEntry(AcuArchive* pArchive) :
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fpArchive(pArchive), fIsSqueezed(false), fOffset(-1)
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{}
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virtual ~AcuEntry(void) {}
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// retrieve thread data
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virtual int ExtractThreadToBuffer(int which, char** ppText, long* pLength,
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CString* pErrMsg) const;
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virtual int ExtractThreadToFile(int which, FILE* outfp, ConvertEOL conv,
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ConvertHighASCII convHA, CString* pErrMsg) const;
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virtual long GetSelectionSerial(void) const { return -1; } // doesn't matter
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virtual bool GetFeatureFlag(Feature feature) const {
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if (feature == kFeaturePascalTypes || feature == kFeatureDOSTypes ||
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feature == kFeatureHasSimpleAccess)
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return false;
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else
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return true;
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}
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NuError TestEntry(CWnd* pMsgWnd);
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bool GetSqueezed(void) const { return fIsSqueezed; }
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void SetSqueezed(bool val) { fIsSqueezed = val; }
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long GetOffset(void) const { return fOffset; }
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void SetOffset(long offset) { fOffset = offset; }
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private:
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NuError CopyData(FILE* outfp, ConvertEOL conv, ConvertHighASCII convHA,
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CString* pMsg) const;
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//NuError BNYUnSqueeze(ExpandBuffer* outExp) const;
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AcuArchive* fpArchive; // holds FILE* for archive
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bool fIsSqueezed;
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long fOffset;
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};
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/*
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* ACU archive definition.
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*/
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class AcuArchive : public GenericArchive {
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public:
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AcuArchive(void) : fIsReadOnly(false), fFp(nil)
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{}
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virtual ~AcuArchive(void) { (void) Close(); }
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// One-time initialization; returns an error string.
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static CString AppInit(void);
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virtual OpenResult Open(const WCHAR* filename, bool readOnly,
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CString* pErrMsg);
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virtual CString New(const WCHAR* filename, const void* options);
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virtual CString Flush(void) { return ""; }
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virtual CString Reload(void);
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virtual bool IsReadOnly(void) const { return fIsReadOnly; };
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virtual bool IsModified(void) const { return false; }
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virtual void GetDescription(CString* pStr) const { *pStr = "AppleLink ACU"; }
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virtual bool BulkAdd(ActionProgressDialog* pActionProgress,
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const AddFilesDialog* pAddOpts)
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{ ASSERT(false); return false; }
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virtual bool AddDisk(ActionProgressDialog* pActionProgress,
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const AddFilesDialog* pAddOpts)
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{ ASSERT(false); return false; }
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virtual bool CreateSubdir(CWnd* pMsgWnd, GenericEntry* pParentEntry,
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const WCHAR* newName)
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{ ASSERT(false); return false; }
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virtual bool TestSelection(CWnd* pMsgWnd, SelectionSet* pSelSet);
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virtual bool DeleteSelection(CWnd* pMsgWnd, SelectionSet* pSelSet)
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{ ASSERT(false); return false; }
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virtual bool RenameSelection(CWnd* pMsgWnd, SelectionSet* pSelSet)
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{ ASSERT(false); return false; }
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virtual bool RenameVolume(CWnd* pMsgWnd, DiskFS* pDiskFS,
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const WCHAR* newName)
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{ ASSERT(false); return false; }
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virtual CString TestVolumeName(const DiskFS* pDiskFS,
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const WCHAR* newName) const
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{ ASSERT(false); return "!"; }
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virtual CString TestPathName(const GenericEntry* pGenericEntry,
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const CString& basePath, const CString& newName, char newFssep) const
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{ ASSERT(false); return "!"; }
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virtual bool RecompressSelection(CWnd* pMsgWnd, SelectionSet* pSelSet,
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const RecompressOptionsDialog* pRecompOpts)
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{ ASSERT(false); return false; }
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virtual XferStatus XferSelection(CWnd* pMsgWnd, SelectionSet* pSelSet,
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ActionProgressDialog* pActionProgress, const XferFileOptions* pXferOpts)
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{ ASSERT(false); return kXferFailed; }
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virtual bool GetComment(CWnd* pMsgWnd, const GenericEntry* pEntry,
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CString* pStr)
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{ ASSERT(false); return false; }
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virtual bool SetComment(CWnd* pMsgWnd, GenericEntry* pEntry,
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const CString& str)
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{ ASSERT(false); return false; }
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virtual bool DeleteComment(CWnd* pMsgWnd, GenericEntry* pEntry)
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{ ASSERT(false); return false; }
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virtual bool SetProps(CWnd* pMsgWnd, GenericEntry* pEntry,
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const FileProps* pProps)
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{ ASSERT(false); return false; }
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virtual void PreferencesChanged(void) {}
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virtual long GetCapability(Capability cap);
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friend class AcuEntry;
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private:
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virtual CString Close(void) {
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if (fFp != nil) {
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fclose(fFp);
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fFp = nil;
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}
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return "";
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}
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virtual void XferPrepare(const XferFileOptions* pXferOpts)
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{ ASSERT(false); }
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virtual CString XferFile(FileDetails* pDetails, unsigned char** pDataBuf,
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long dataLen, unsigned char** pRsrcBuf, long rsrcLen)
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{ ASSERT(false); return "!"; }
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virtual void XferAbort(CWnd* pMsgWnd)
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{ ASSERT(false); }
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virtual void XferFinish(CWnd* pMsgWnd)
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{ ASSERT(false); }
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virtual ArchiveKind GetArchiveKind(void) { return kArchiveACU; }
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virtual NuError DoAddFile(const AddFilesDialog* pAddOpts,
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FileDetails* pDetails)
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{ ASSERT(false); return kNuErrGeneric; }
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enum {
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kAcuMaxFileName = 256, // nice big number
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kAcuMasterHeaderLen = 20,
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kAcuEntryHeaderLen = 54,
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};
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/*
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* The header at the front of an ACU archive.
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*/
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typedef struct AcuMasterHeader {
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unsigned short fileCount;
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unsigned short unknown1; // 0x01 00 -- might be "version 1?"
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unsigned char fZink[6]; // "fZink", low ASCII
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unsigned char unknown2[11]; // 0x01 36 00 00 00 00 00 00 00 00 dd
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} AcuMasterHeader;
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/*
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* An entry in an ACU archive. Each archive is essentially a stream
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* of files; only the "filesToFollow" value gives any indication that
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* something else follows this entry.
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*
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* We read this from the archive and then unpack the interesting parts
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* into GenericEntry fields in an AcuEntry.
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*/
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struct AcuFileEntry;
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friend struct AcuFileEntry;
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typedef struct AcuFileEntry {
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unsigned char compressionType;
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unsigned short dataChecksum; // ??
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unsigned short blockCount; // total blocks req'd to hold file
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unsigned long dataStorageLen; // length of data within archive
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unsigned short access;
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unsigned short fileType;
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unsigned long auxType;
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unsigned char storageType;
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unsigned long dataEof;
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unsigned short prodosModDate;
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unsigned short prodosModTime;
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NuDateTime modWhen; // computed from previous two fields
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unsigned short prodosCreateDate;
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unsigned short prodosCreateTime;
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NuDateTime createWhen; // computed from previous two fields
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unsigned short fileNameLen;
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unsigned short headerChecksum; // ??
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char fileName[kAcuMaxFileName+1];
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// possibilities for mystery fields:
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// - OS type (note ProDOS is $00)
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// - forked file support
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} AcuFileEntry;
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/* known compression types */
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enum CompressionType {
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kAcuCompNone = 0,
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kAcuCompSqueeze = 3,
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};
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int LoadContents(void);
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int ReadMasterHeader(int* pNumEntries);
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NuError ReadFileHeader(AcuFileEntry* pEntry);
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void DumpFileHeader(const AcuFileEntry* pEntry);
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int CreateEntry(const AcuFileEntry* pEntry);
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bool IsDir(const AcuFileEntry* pEntry);
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NuError AcuRead(void* buf, size_t nbyte);
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NuError AcuSeek(long offset);
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void AcuConvertDateTime(unsigned short prodosDate,
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unsigned short prodosTime, NuDateTime* pWhen);
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FILE* fFp;
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bool fIsReadOnly;
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};
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#endif /*APP_ACUARCHIVE_H*/
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