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Added support for loading PK3s in read-only mode (#477)

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biwa 2020-09-27 15:05:27 +02:00 committed by GitHub
parent d12f5fdb59
commit 8e043aa875
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1 changed files with 79 additions and 5 deletions
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84
Source/Core/Data/PK3Reader.cs
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@ -40,6 +40,7 @@ namespace CodeImp.DoomBuilder.Data
private /*readonly*/ ArchiveType archivetype; //mxd
private /*readonly*/ Dictionary<string, byte[]> sevenzipentries; //mxd
private bool batchmode = true; //mxd
private FileStream filestream;
#endregion
@ -74,7 +75,26 @@ namespace CodeImp.DoomBuilder.Data
private void LoadFrom(DataLocation dl, bool asreadonly)
{
General.WriteLogLine("Opening " + Path.GetExtension(location.location).ToUpper().Replace(".", "") + " resource \"" + location.location + "\"");
FileAccess access;
FileShare share;
isreadonly = asreadonly;
// Determine if opening for read only
if (isreadonly)
{
// Read only
access = FileAccess.Read;
share = FileShare.ReadWrite;
}
else
{
// Private access
access = FileAccess.ReadWrite;
share = FileShare.Read;
}
General.WriteLogLine("Opening " + Path.GetExtension(location.location).ToUpper().Replace(".", "") + " resource \"" + location.location + "\"");
if (!File.Exists(location.location))
throw new FileNotFoundException("Could not find the file \"" + location.location + "\"", location.location);
@ -82,8 +102,11 @@ namespace CodeImp.DoomBuilder.Data
// Make list of all files
List<DirectoryFileEntry> fileentries = new List<DirectoryFileEntry>();
// Create archive
archive = ArchiveFactory.Open(location.location);
// Take the detour with a FileStream because SharpCompress doesn't directly support opening files as read-only
filestream = File.Open(location.location, FileMode.OpenOrCreate, access, share);
// Create archive
archive = ArchiveFactory.Open(filestream);
archivetype = archive.Type;
// Random access of 7z archives works TERRIBLY slow in SharpCompress
@ -116,6 +139,9 @@ namespace CodeImp.DoomBuilder.Data
archive.Dispose();
archive = null;
filestream.Dispose();
filestream = null;
// Make files list
files = new DirectoryFilesList(dl.GetDisplayName(), fileentries);
@ -148,6 +174,12 @@ namespace CodeImp.DoomBuilder.Data
archive = null;
}
if(filestream != null)
{
filestream.Dispose();
filestream = null;
}
// Done
base.Dispose();
}
@ -162,12 +194,39 @@ namespace CodeImp.DoomBuilder.Data
if (enable && archive == null)
{
archive = ArchiveFactory.Open(location.location);
FileAccess access;
FileShare share;
// Determine if opening for read only
if (isreadonly)
{
// Read only
access = FileAccess.Read;
share = FileShare.ReadWrite;
}
else
{
// Private access
access = FileAccess.ReadWrite;
share = FileShare.Read;
}
// The file might have vanished in the meantime
if (!File.Exists(location.location))
throw new FileNotFoundException("Could not find the file \"" + location.location + "\"", location.location);
// Take the detour with a FileStream because SharpCompress doesn't directly support opening files as read-only
filestream = File.Open(location.location, FileMode.OpenOrCreate, access, share);
archive = ArchiveFactory.Open(filestream);
}
else if (!enable && !batchmode && archive != null)
{
archive.Dispose();
archive = null;
filestream.Dispose();
filestream = null;
}
}
}
@ -522,7 +581,22 @@ namespace CodeImp.DoomBuilder.Data
if (string.Compare(entry.Key, fn, true) == 0)
{
filedata = new MemoryStream();
entry.WriteTo(filedata);
try
{
entry.WriteTo(filedata);
}
catch(SharpCompress.Compressors.Deflate.ZlibException e)
{
// This happens when the PK3 was modified externally and the resources were not reloaded
General.ErrorLogger.Add(ErrorType.Error, "Cannot load the file \"" + filename + "\" from archive \"" + location.GetDisplayName() + "\". Did you modify the archive without reloading the resouces?");
filedata.Dispose();
filedata = null;
return null;
}
break;
}
}