private async Task<SafeUnmanagedArray> Decompress()
{
_userName = ((MainWindow)this.GetRootElement()).GetUserName();
string securityKey = await ((MainWindow)this.GetRootElement()).GetSecurityKeyAsync(true);
if (CancelEvent.IsSet())
return null;
using (FileStream input = File.OpenRead(PatcherService.ArchiveFileName))
using (MemoryStream ms = new MemoryStream((int)input.Length))
{
if (CancelEvent.IsSet())
return null;
Maximum = input.Length;
using (CryptoProvider cryptoProvider = new CryptoProvider(securityKey, CancelEvent))
{
cryptoProvider.Progress += OnProgress;
await cryptoProvider.Decrypt(input, ms);
}
if (CancelEvent.IsSet())
return null;
Position = ms.Position = 0;
BinaryReader br = new BinaryReader(ms);
int uncompressedSize = br.ReadInt32();
byte[] buff = new byte[Math.Min(32 * 1024, uncompressedSize)];
if (CancelEvent.IsSet())
return null;
SafeUnmanagedArray result = new SafeUnmanagedArray(uncompressedSize);
try
{
if (CancelEvent.IsSet())
return null;
Maximum = uncompressedSize;
using (UnmanagedMemoryStream output = result.OpenStream(FileAccess.Write))
ZLibHelper.Uncompress(ms, output, uncompressedSize, buff, CancellationToken.None, OnProgress);
}
catch
{
result.SafeDispose();
throw;
}
return result;
}
}
private async Task Pack(string root, string securityKey, string targetPath)
{
if (CancelEvent.IsSet())
return;
using (MemoryStream buff = new MemoryStream(16 * 1024 * 1024))
{
BinaryWriter bw = new BinaryWriter(buff);
bw.Write((byte)PatchFormatVersion.V1);
bw.Write((byte)FFXIIIGamePart.Part1);
if (CancelEvent.IsSet())
return;
await PackTexts(root, bw);
if (CancelEvent.IsSet())
return;
await PackImgb(root, bw);
if (CancelEvent.IsSet())
return;
buff.Flush();
int length = (int)buff.Position;
buff.Position = 0;
using (MemoryStream compressed = new MemoryStream(length + 4 + 256))
using (BinaryWriter cbw = new BinaryWriter(compressed))
{
if (CancelEvent.IsSet())
return;
cbw.Write(length);
Position = 0;
Maximum = length;
ZLibHelper.Compress(buff, compressed, length, OnProgress);
compressed.Position = 0;
if (CancelEvent.IsSet())
return;
Position = 0;
Maximum = compressed.Length;
using (CryptoProvider cryptoProvider = new CryptoProvider(securityKey, CancelEvent))
{
cryptoProvider.Progress += OnProgress;
using (FileStream output = File.Create(targetPath))
await cryptoProvider.Encrypt(compressed, output);
}
}
}
}
