/// <summary>
/// Attempt to extract a stream from an archive
/// </summary>
/// <param name="entryName">Name of the entry to be extracted</param>
/// <param name="realEntry">Output representing the entry name that was found</param>
/// <returns>MemoryStream representing the entry, null on error</returns>
public override (MemoryStream, string) CopyToStream(string entryName)
{
MemoryStream ms = new MemoryStream();
string realEntry = null;
try
{
SharpCompress.Archives.SevenZip.SevenZipArchive sza = SharpCompress.Archives.SevenZip.SevenZipArchive.Open(_filename, new ReaderOptions {
LeaveStreamOpen = false,
});
foreach (SevenZipArchiveEntry entry in sza.Entries)
{
if (entry != null && !entry.IsDirectory && entry.Key.Contains(entryName))
{
// Write the file out
realEntry = entry.Key;
entry.WriteTo(ms);
break;
}
}
sza.Dispose();
}
catch (Exception ex)
{
Globals.Logger.Error(ex.ToString());
ms = null;
realEntry = null;
}
return(ms, realEntry);
}
/// <summary>
/// Generate a list of DatItem objects from the header values in an archive
/// </summary>
/// <param name="omitFromScan">Hash representing the hashes that should be skipped</param>
/// <param name="date">True if entry dates should be included, false otherwise (default)</param>
/// <returns>List of DatItem objects representing the found data</returns>
/// <remarks>TODO: All instances of Hash.DeepHashes should be made into 0x0 eventually</remarks>
public override List <BaseFile> GetChildren(Hash omitFromScan = Hash.DeepHashes, bool date = false)
{
List <BaseFile> found = new List <BaseFile>();
string gamename = Path.GetFileNameWithoutExtension(_filename);
try
{
SharpCompress.Archives.SevenZip.SevenZipArchive sza = SharpCompress.Archives.SevenZip.SevenZipArchive.Open(Utilities.TryOpenRead(_filename));
foreach (SevenZipArchiveEntry entry in sza.Entries.Where(e => e != null && !e.IsDirectory))
{
// If secure hashes are disabled, do a quickscan
if (omitFromScan == Hash.SecureHashes)
{
found.Add(new BaseFile
{
Filename = entry.Key,
Size = entry.Size,
CRC = BitConverter.GetBytes(entry.Crc),
Date = (date && entry.LastModifiedTime != null ? entry.LastModifiedTime?.ToString("yyyy/MM/dd hh:mm:ss") : null),
Parent = gamename,
});
}
// Otherwise, use the stream directly
else
{
Stream entryStream = entry.OpenEntryStream();
BaseFile sevenZipEntryRom = Utilities.GetStreamInfo(entryStream, entry.Size, omitFromScan: omitFromScan);
sevenZipEntryRom.Filename = entry.Key;
sevenZipEntryRom.Parent = gamename;
sevenZipEntryRom.Date = (date && entry.LastModifiedTime != null ? entry.LastModifiedTime?.ToString("yyyy/MM/dd hh:mm:ss") : null);
found.Add(sevenZipEntryRom);
entryStream.Dispose();
}
}
// Dispose of the archive
sza.Dispose();
}
catch (Exception ex)
{
Globals.Logger.Error(ex.ToString());
return(null);
}
return(found);
}
/// <summary>
/// Attempt to extract a file as an archive
/// </summary>
/// <param name="outDir">Output directory for archive extraction</param>
/// <returns>True if the extraction was a success, false otherwise</returns>
public override bool CopyAll(string outDir)
{
bool encounteredErrors = true;
try
{
// Create the temp directory
Directory.CreateDirectory(outDir);
// Extract all files to the temp directory
SharpCompress.Archives.SevenZip.SevenZipArchive sza = SharpCompress.Archives.SevenZip.SevenZipArchive.Open(Utilities.TryOpenRead(_filename));
foreach (SevenZipArchiveEntry entry in sza.Entries)
{
entry.WriteToDirectory(outDir, new ExtractionOptions {
PreserveFileTime = true, ExtractFullPath = true, Overwrite = true
});
}
encounteredErrors = false;
sza.Dispose();
}
catch (EndOfStreamException)
{
// Catch this but don't count it as an error because SharpCompress is unsafe
}
catch (InvalidOperationException)
{
encounteredErrors = true;
}
catch (Exception ex)
{
Globals.Logger.Error(ex.ToString());
encounteredErrors = true;
}
return(encounteredErrors);
}