private static string GetFileName(NativeMethods.FDI.NOTIFICATION notification)
{
bool utf8Name = (notification.attribs & (ushort)FileAttributes.Normal) != 0; // _A_NAME_IS_UTF
// Non-utf8 names should be completely ASCII. But for compatibility with
// legacy tools, interpret them using the current (Default) ANSI codepage.
Encoding nameEncoding = utf8Name ? Encoding.UTF8 : Encoding.Default;
// Find how many bytes are in the string.
// Unfortunately there is no faster way.
int nameBytesCount = 0;
while (Marshal.ReadByte(notification.psz1, nameBytesCount) != 0)
{
nameBytesCount++;
}
byte[] nameBytes = new byte[nameBytesCount];
Marshal.Copy(notification.psz1, nameBytes, 0, nameBytesCount);
string name = nameEncoding.GetString(nameBytes);
if (Path.IsPathRooted(name))
{
name = name.Replace("" + Path.VolumeSeparatorChar, "");
}
return(name);
}
private int CabExtractCopyFile(NativeMethods.FDI.NOTIFICATION notification)
{
if (notification.iFolder != folderId)
{
if (notification.iFolder != -3) // -3 is a special folderId used when continuing a folder from a previous cab
{
if (folderId != -1) // -1 means we just started the extraction sequence
{
currentFolderNumber++;
}
}
folderId = notification.iFolder;
}
//bool execute = (notification.attribs & (ushort) FileAttributes.Device) != 0; // _A_EXEC
string name = GetFileName(notification);
if (filter == null || filter(name))
{
currentFileNumber++;
currentFileName = name;
currentFileBytesProcessed = 0;
currentFileTotalBytes = notification.cb;
OnProgress(ArchiveProgressType.StartFile);
DateTime lastWriteTime;
CompressionEngine.DosDateAndTimeToDateTime(notification.date, notification.time, out lastWriteTime);
Stream stream = context.OpenFileWriteStream(name, notification.cb, lastWriteTime);
if (stream != null)
{
FileStream = stream;
int streamHandle = StreamHandles.AllocHandle(stream);
return(streamHandle);
}
fileBytesProcessed += notification.cb;
OnProgress(ArchiveProgressType.FinishFile);
currentFileName = null;
}
return(0); // Continue
}
private int CabExtractNotify(NativeMethods.FDI.NOTIFICATIONTYPE notificationType, NativeMethods.FDI.NOTIFICATION notification)
{
switch (notificationType)
{
case NativeMethods.FDI.NOTIFICATIONTYPE.CABINET_INFO: {
if (NextCabinetName != null && NextCabinetName.StartsWith("?", StringComparison.Ordinal))
{
// We are just continuing the copy of a file that spanned cabinets.
// The next cabinet name needs to be preserved.
NextCabinetName = NextCabinetName.Substring(1);
}
else
{
string nextCab = Marshal.PtrToStringAnsi(notification.psz1);
NextCabinetName = (nextCab.Length != 0 ? nextCab : null);
}
return(0); // Continue
}
case NativeMethods.FDI.NOTIFICATIONTYPE.NEXT_CABINET: {
string nextCab = Marshal.PtrToStringAnsi(notification.psz1);
CabNumbers[nextCab] = notification.iCabinet;
NextCabinetName = "?" + NextCabinetName;
return(0); // Continue
}
case NativeMethods.FDI.NOTIFICATIONTYPE.COPY_FILE: {
return(CabExtractCopyFile(notification));
}
case NativeMethods.FDI.NOTIFICATIONTYPE.CLOSE_FILE_INFO: {
return(CabExtractCloseFile(notification));
}
}
return(0);
}
private int CabListNotify(NativeMethods.FDI.NOTIFICATIONTYPE notificationType, NativeMethods.FDI.NOTIFICATION notification)
{
switch (notificationType)
{
case NativeMethods.FDI.NOTIFICATIONTYPE.CABINET_INFO: {
string nextCab = Marshal.PtrToStringAnsi(notification.psz1);
NextCabinetName = (nextCab.Length != 0 ? nextCab : null);
return(0); // Continue
}
case NativeMethods.FDI.NOTIFICATIONTYPE.PARTIAL_FILE: {
// This notification can occur when examining the contents of a non-first cab file.
return(0); // Continue
}
case NativeMethods.FDI.NOTIFICATIONTYPE.COPY_FILE: {
//bool execute = (notification.attribs & (ushort) FileAttributes.Device) != 0; // _A_EXEC
string name = GetFileName(notification);
if (filter == null || filter(name))
{
if (fileList != null)
{
FileAttributes attributes = (FileAttributes)notification.attribs &
(FileAttributes.Archive | FileAttributes.Hidden | FileAttributes.ReadOnly | FileAttributes.System);
if (attributes == 0)
{
attributes = FileAttributes.Normal;
}
DateTime lastWriteTime;
CompressionEngine.DosDateAndTimeToDateTime(notification.date, notification.time, out lastWriteTime);
long length = notification.cb;
CabFileInfo fileInfo = new CabFileInfo(
name,
notification.iFolder,
notification.iCabinet,
attributes,
lastWriteTime,
length);
fileList.Add(fileInfo);
currentFileNumber = fileList.Count - 1;
fileBytesProcessed += notification.cb;
}
}
totalFiles++;
totalFileBytes += notification.cb;
return(0); // Continue
}
}
return(0);
}
