public FileEntry(BinaryReader reader, HpiArchive parentArchive)
{
OffsetOfCompressedData = reader.ReadInt32();
UncompressedSize = reader.ReadInt32();
FlagCompression = (CompressionMethod)reader.ReadByte();
parent = parentArchive;
}
public static void DoExtraction(PathCollection archivesFiles, string destinationPath, IProgress <string> progress)
{
foreach (var archiveFullPath in archivesFiles.Keys)
{
using (var archive = new HpiArchive(File.OpenRead(archiveFullPath)))
{
//int progressLimiter = (fileList.Count - 1) / 100 + 1; //Reduce progress calls
foreach (var shortFileName in archivesFiles[archiveFullPath])
{
string fullName = destinationPath + "\\" + shortFileName;
Directory.CreateDirectory(Path.GetDirectoryName(fullName));
var entry = archive.Entries[shortFileName];
File.WriteAllBytes(fullName, archive.Extract(entry));
//Report progress
if (progress != null) //&& i % progressLimiter == 0)
{
progress.Report(shortFileName);
}
}
}
}
}
public static void Merge(PathCollection archivesFiles, string destinationArchiveFileName, CompressionFlavor flavor, IProgress <string> progress)
{
var files = new SortedDictionary <string, FileEntry>();
foreach (var archiveFullPath in archivesFiles.Keys)
{
using (var archive = new HpiArchive(File.OpenRead(archiveFullPath)))
foreach (var shortFileName in archivesFiles[archiveFullPath])
{
var entry = archive.Entries[shortFileName];
var buffer = archive.Extract(entry);
if (files.ContainsKey(shortFileName))
{
files[shortFileName] = new FileEntry(buffer, flavor, shortFileName, progress);
}
else
{
files.Add(shortFileName, new FileEntry(buffer, flavor, shortFileName, progress));
}
}
}
WriteToFile(destinationArchiveFileName, files);
}
private static void WriteToFile(string destinationArchiveFileName, SortedDictionary <string, FileEntry> entries)
{
var tree = new DirectoryTree(); //Provisory Tree
foreach (var fileName in entries.Keys)
{
tree.AddEntry(fileName);
}
int directorySize = tree.CalculateSize() + 20;
using (var fileStream = File.Create(destinationArchiveFileName))
{
BinaryWriter chunckWriter = new BinaryWriter(fileStream);
chunckWriter.BaseStream.Position = directorySize;
foreach (var file in entries)
{
if (chunckWriter.BaseStream.Position > Int32.MaxValue)
{
throw new Exception("Maximum allowed size is 2GB (2 147 483 647 bytes).");
}
file.Value.OffsetOfCompressedData = (int)chunckWriter.BaseStream.Position;
if (file.Value.FlagCompression != CompressionMethod.None)
{
foreach (var size in file.Value.compressedChunkSizes)
{
chunckWriter.Write(size);
}
}
foreach (var chunk in file.Value.ChunkBytes)
{
chunckWriter.Write(chunk);
}
}
chunckWriter.Write("Copyright " + DateTime.Now.Year.ToString() + " Cavedog Entertainment"); //Endfile mandatory string
BinaryWriter headerWriter = new BinaryWriter(new MemoryStream());
headerWriter.BaseStream.Position = 0;
headerWriter.Write(HpiArchive.HeaderMarker);
headerWriter.Write(HpiArchive.DefaultVersion);
tree = new DirectoryTree(); //Definitive Tree
foreach (var item in entries.Keys)
{
tree.AddEntry(item);
}
directorySize = tree.CalculateSize() + 20; //TO IMPROVE, BAD CODE
headerWriter.Write(directorySize);
headerWriter.Write(HpiArchive.NoObfuscationKey);
int directoryStart = 20;
headerWriter.Write(directoryStart); //Directory Start at Pos20
IEnumerator <FileEntry> sequence = entries.Values.ToList().GetEnumerator();
HpiArchive.SetEntries(tree, headerWriter, sequence);
fileStream.Position = 0;
headerWriter.BaseStream.Position = 0;
headerWriter.BaseStream.CopyTo(fileStream);
if (fileStream.Length > Int32.MaxValue)
{
MessageBox.Show("The HPI file was created, but its size exceeds 2GB (2 147 483 647 bytes). A fatal error may occur when loading the game.", "Oversize Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
