| public static EstBufSize ( long filesize ) : int | ||
| filesize | long | |
| Результат | int | |
public void WriteTo(Stream stream)
{
using (BinaryReader reader = new BinaryReader(CreateReadStream()))
if (reader.BaseStream.Length > 0)
{
BinaryWriter writer = new BinaryWriter(stream);
byte[] buf;
int bufsize = Utility.EstBufSize(reader.BaseStream.Length);
while ((buf = reader.ReadBytes(bufsize)).Length == bufsize)
{
writer.Write(buf);
}
writer.Write(buf);
}
}
void writeArchiveWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = (BackgroundWorker)sender;
string backup = null;
string dirName = Path.GetDirectoryName(destPath);
if (dirName == String.Empty)
{
dirName = @".\";
}
DirectoryInfo dir = new DirectoryInfo(dirName);
if (!dir.Exists)
{
dir.Create();
}
if (File.Exists(destPath))
{
backup = Utility.GetDestFile(dir, Path.GetFileNameWithoutExtension(destPath), ".bak");
File.Move(destPath, backup);
if (destPath.Equals(this.FilePath, StringComparison.InvariantCultureIgnoreCase))
{
foreach (IWriteFile iw in Subfiles)
{
if (iw is ppSubfile)
{
ppSubfile subfile = iw as ppSubfile;
if (subfile.ppPath.Equals(this.FilePath, StringComparison.InvariantCultureIgnoreCase))
{
subfile.ppPath = backup;
}
}
}
}
}
try
{
using (BinaryWriter writer = new BinaryWriter(File.Create(destPath)))
{
writer.BaseStream.Seek(ppHeader.HeaderSize(Subfiles.Count), SeekOrigin.Begin);
long offset = writer.BaseStream.Position;
var Hashes = new MetaIWriteList();
for (int i = 0; i < Subfiles.Count; i++)
{
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
worker.ReportProgress(i * 100 / Subfiles.Count);
System.Diagnostics.Trace.WriteLine(Subfiles[i].Name);
if (Subfiles[i] is ppSubfile)
{
ppSubfile subfile = Subfiles[i] as ppSubfile;
using (MD5 md5 = MD5.Create())
using (MemoryStream mem = new MemoryStream())
using (BinaryReader reader = new BinaryReader(File.OpenRead(subfile.ppPath)))
{
reader.BaseStream.Seek(subfile.offset, SeekOrigin.Begin);
int bufsize = Utility.EstBufSize(subfile.size);
uint hash = 0;
if (bufsize == 0)
{
Hashes.AddNew(Subfiles[i], hash, 0, subfile.Metadata);
continue;
}
int readSteps = (int)subfile.size / bufsize;
byte[] buf;
for (int j = 0; j < readSteps; j++)
{
buf = reader.ReadBytes(bufsize);
md5.TransformBlock(buf, 0, bufsize, buf, 0);
mem.WriteBytes(buf);
}
int remaining = (int)(subfile.size % bufsize);
buf = reader.ReadBytes(remaining);
md5.TransformFinalBlock(buf, 0, remaining);
mem.WriteBytes(buf);
hash = BitConverter.ToUInt32(md5.Hash, 0);
if (!Hashes.Any(x => x.Hash == hash))
{
writer.Write(mem.ToArray());
Hashes.AddNew(Subfiles[i], hash, (uint)(writer.BaseStream.Position - offset), subfile.Metadata);
}
else
{
var first = Hashes.First(x => x.Hash == hash);
Hashes.AddNew(Subfiles[i], hash, first.Size, first.Metadata);
}
}
}
else
{
Stream stream = ppFormat.WriteStream(writer.BaseStream);
using (MD5 md5 = MD5.Create())
using (MemoryStream mem = new MemoryStream())
{
Subfiles[i].WriteTo(mem);
uint hash = BitConverter.ToUInt32(md5.ComputeHash(mem.ToArray()), 0);
if (Hashes.Any(x => x.Hash == hash))
{
var first = Hashes.First(x => x.Hash == hash);
Hashes.AddNew(Subfiles[i], hash, first.Size, first.Metadata);
}
else
{
mem.WriteTo(stream);
object meta = ppFormat.FinishWriteTo(stream);
long ppos = writer.BaseStream.Position;
Hashes.AddNew(Subfiles[i], hash, (uint)(ppos - offset), meta);
}
}
}
offset = writer.BaseStream.Position;
}
if (!e.Cancel)
{
writer.BaseStream.Seek(0, SeekOrigin.Begin);
ppHeader.WriteRLEHeader(writer.BaseStream, Hashes);
}
}
if (e.Cancel)
{
RestoreBackup(destPath, backup);
}
else if ((backup != null) && !keepBackup)
{
File.Delete(backup);
}
foreach (IWriteFile iw in Subfiles)
{
if (iw is IDisposable)
{
((IDisposable)iw).Dispose();
}
}
//ReloadSubfiles();
}
catch (Exception ex)
{
RestoreBackup(destPath, backup);
throw new Exception("PP Parser has encountered an error.", ex);
}
}
