private bool IsCabinet(Stream cabStream, out short id, out int cabFolderCount, out int fileCount)
{
int streamHandle = StreamHandles.AllocHandle(cabStream);
try {
Erf.Clear();
NativeMethods.FDI.CABINFO fdici;
bool isCabinet = 0 != NativeMethods.FDI.IsCabinet(fdiHandle, streamHandle, out fdici);
if (Erf.Error)
{
if (((NativeMethods.FDI.ERROR)Erf.Oper) == NativeMethods.FDI.ERROR.UNKNOWN_CABINET_VERSION)
{
isCabinet = false;
}
else
{
throw new CabException(
Erf.Oper,
Erf.Type,
CabException.GetErrorMessage(Erf.Oper, Erf.Type, true));
}
}
id = fdici.setID;
cabFolderCount = fdici.cFolders;
fileCount = fdici.cFiles;
return(isCabinet);
} finally {
StreamHandles.FreeHandle(streamHandle);
}
}
public IList <ArchiveFileInfo> GetFileInfo(
IUnpackStreamContext streamContext,
Predicate <string> fileFilter)
{
if (streamContext == null)
{
throw new ArgumentNullException("streamContext");
}
lock (this)
{
_context = streamContext;
_filter = fileFilter;
NextCabinetName = string.Empty;
_fileList = new List <ArchiveFileInfo>();
var tmpSuppress = SuppressProgressEvents;
SuppressProgressEvents = true;
try
{
for (short cabNumber = 0;
NextCabinetName != null;
cabNumber++)
{
Erf.Clear();
CabNumbers[NextCabinetName] = cabNumber;
NativeMethods.FDI.Copy(
_fdiHandle,
NextCabinetName,
string.Empty,
0,
CabListNotify,
IntPtr.Zero,
IntPtr.Zero);
CheckError(true);
}
var tmpFileList = _fileList;
_fileList = null;
return(tmpFileList.AsReadOnly());
}
finally
{
SuppressProgressEvents = tmpSuppress;
if (CabStream != null)
{
_context.CloseArchiveReadStream(
CurrentArchiveNumber,
CurrentArchiveName,
CabStream);
CabStream = null;
}
_context = null;
}
}
}
private void AddFile(
string name,
Stream stream,
FileAttributes attributes,
DateTime lastWriteTime,
bool execute,
CompressionLevel compLevel)
{
FileStream = stream;
_fileAttributes = attributes &
(FileAttributes.Archive | FileAttributes.Hidden | FileAttributes.ReadOnly | FileAttributes.System);
_fileLastWriteTime = lastWriteTime;
CurrentFileName = name;
var tcomp = GetCompressionType(compLevel);
var namePtr = IntPtr.Zero;
try
{
var nameEncoding = Encoding.ASCII;
if (Encoding.UTF8.GetByteCount(name) > name.Length)
{
nameEncoding = Encoding.UTF8;
_fileAttributes |= FileAttributes.Normal; // _A_NAME_IS_UTF
}
var nameBytes = nameEncoding.GetBytes(name);
namePtr = Marshal.AllocHGlobal(nameBytes.Length + 1);
Marshal.Copy(nameBytes, 0, namePtr, nameBytes.Length);
Marshal.WriteByte(namePtr, nameBytes.Length, 0);
Erf.Clear();
NativeMethods.FCI.AddFile(
_fciHandle,
string.Empty,
namePtr,
execute,
_fciGetNextCabinet,
_fciCreateStatus,
_fciGetOpenInfo,
tcomp);
}
finally
{
if (namePtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(namePtr);
}
}
CheckError(false);
FileStream = null;
CurrentFileName = null;
}
private void CreateFci(long maxArchiveSize)
{
var ccab = new NativeMethods.FCI.CCAB();
if (maxArchiveSize > 0 && maxArchiveSize < ccab.cb)
{
ccab.cb = Math.Max(
NativeMethods.FCI.MIN_DISK, (int)maxArchiveSize);
}
var maxFolderSizeOption = _context.GetOption(
"maxFolderSize", null);
if (maxFolderSizeOption != null)
{
var maxFolderSize = Convert.ToInt64(
maxFolderSizeOption, CultureInfo.InvariantCulture);
if (maxFolderSize > 0 && maxFolderSize < ccab.cbFolderThresh)
{
ccab.cbFolderThresh = (int)maxFolderSize;
}
}
_maxCabBytes = ccab.cb;
ccab.szCab = _context.GetArchiveName(0);
if (ccab.szCab == null)
{
throw new FileNotFoundException("Cabinet name not provided by stream context.");
}
ccab.setID = (short)new Random().Next(
Int16.MinValue, Int16.MaxValue + 1);
CabNumbers[ccab.szCab] = 0;
CurrentArchiveName = ccab.szCab;
TotalArchives = 1;
CabStream = null;
Erf.Clear();
_fciHandle = NativeMethods.FCI.Create(
ErfHandle.AddrOfPinnedObject(),
_fciFilePlacedHandler,
_fciAllocMemHandler,
_fciFreeMemHandler,
_fciOpenStreamHandler,
_fciReadStreamHandler,
_fciWriteStreamHandler,
_fciCloseStreamHandler,
_fciSeekStreamHandler,
_fciDeleteFileHandler,
_fciGetTempFileHandler,
ccab,
IntPtr.Zero);
CheckError(false);
}
private void FlushCabinet()
{
Erf.Clear();
NativeMethods.FCI.FlushCabinet(_fciHandle, false, _fciGetNextCabinet, _fciCreateStatus);
CheckError(false);
}
public void Unpack(
IUnpackStreamContext streamContext,
Predicate <string> fileFilter)
{
lock (this) {
IList <ArchiveFileInfo> files =
GetFileInfo(streamContext, fileFilter);
ResetProgressData();
if (files != null)
{
totalFiles = files.Count;
for (int i = 0; i < files.Count; i++)
{
totalFileBytes += files[i].Length;
if (files[i].ArchiveNumber >= this.totalArchives)
{
int totalArchives = files[i].ArchiveNumber + 1;
this.totalArchives = (short)totalArchives;
}
}
}
context = streamContext;
fileList = null;
NextCabinetName = String.Empty;
folderId = -1;
currentFileNumber = -1;
try {
for (short cabNumber = 0;
NextCabinetName != null;
cabNumber++)
{
Erf.Clear();
CabNumbers[NextCabinetName] = cabNumber;
NativeMethods.FDI.Copy(
fdiHandle,
NextCabinetName,
String.Empty,
0,
CabExtractNotify,
IntPtr.Zero,
IntPtr.Zero);
CheckError(true);
}
} finally {
if (CabStream != null)
{
context.CloseArchiveReadStream(
currentArchiveNumber,
currentArchiveName,
CabStream);
CabStream = null;
}
if (FileStream != null)
{
context.CloseFileWriteStream(currentFileName, FileStream, FileAttributes.Normal, DateTime.Now);
FileStream = null;
}
context = null;
}
}
}
