public static unsafe DeltaHeaderInfo GetDeltaFileInformation(string path)
{
byte[] delta;
DeltaHeaderInfo info;
using (FileStream fStr = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (MemoryStream mStr = new MemoryStream((int)fStr.Length))
{
fStr.Position = 4;
fStr.CopyTo(mStr);
delta = mStr.ToArray();
}
fixed(byte *deltaPtr = delta)
{
DeltaInput deltaData = new DeltaInput()
{
lpStart = new IntPtr(deltaPtr),
uSize = (IntPtr)delta.Length,
Editable = false
};
bool success = GetDeltaInfoB(deltaData, out info);
if (!success)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
return(info);
}
public static unsafe byte[] LoadManifest(string path)
{
byte[] source, delta, output;
bool success = false;
using (FileStream fStr = new FileStream(wcpBasePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (MemoryStream mStr = new MemoryStream((int)fStr.Length))
{
fStr.CopyTo(mStr);
source = mStr.ToArray();
}
using (FileStream fStr = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (MemoryStream mStr = new MemoryStream((int)fStr.Length))
{
//fStr.Position = 4;
byte[] compTest = new byte[4];
fStr.Read(compTest, 0, 4);
uint headerInt = BitConverter.ToUInt32(compTest, 0);
if (headerInt == 0x3CBFBBEF || headerInt == 0x6D783F3C) //decompressed XML starts
{
if (headerInt == 0x3CBFBBEF)
{
fStr.Position = 3;
}
else
{
fStr.Position = 0;
}
fStr.CopyTo(mStr);
mStr.Position = 0x69;
mStr.WriteByte(0x33);
mStr.Position = 0;
return(mStr.ToArray());
//return null;
}
fStr.CopyTo(mStr);
delta = mStr.ToArray();
}
fixed(byte *sourcePtr = source)
fixed(byte *deltaPtr = delta)
{
DeltaInput sourceData = new DeltaInput()
{
lpStart = new IntPtr(sourcePtr),
uSize = (IntPtr)source.Length,
Editable = false
};
DeltaInput deltaData = new DeltaInput()
{
lpStart = new IntPtr(deltaPtr),
uSize = (IntPtr)delta.Length,
Editable = false
};
success = ApplyDeltaB(DeltaInputFlags.DELTA_FLAG_NONE, sourceData, deltaData, out DeltaOutput outData);
if (!success)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
output = new byte[outData.cbBuf.ToInt32()];
Marshal.Copy(outData.pBuf, output, 0, output.Length);
//for (int i = 0; i < output.Length; i++)
//{
// output[i] = (byte)Marshal.PtrToStructure(outData.lpStart + i, typeof(byte));
//}
success = DeltaFree(outData.pBuf);
if (!success)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
return(output);
}
public static unsafe void ApplyDelta(string basisPath, string patchPath, long patchOffset, int patchSize, string outputPath, bool allowPA19 = false)
{
byte[] source, delta;
bool success = false;
using (FileStream fStr = new FileStream(basisPath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (MemoryStream mStr = new MemoryStream((int)fStr.Length))
{
fStr.CopyTo(mStr);
source = mStr.ToArray();
}
using (FileStream fStr = new FileStream(patchPath, FileMode.Open, FileAccess.Read, FileShare.Read))
//using (MemoryStream mStr = new MemoryStream((int)fStr.Length))
{
//fStr.Position = 4;
//fStr.CopyTo(mStr);
//delta = mStr.ToArray();
fStr.Position = patchOffset;
delta = new byte[patchSize];
fStr.Read(delta, 0, patchSize);
}
fixed(byte *sourcePtr = source)
fixed(byte *deltaPtr = delta)
{
DeltaInput sourceData = new DeltaInput()
{
lpStart = new IntPtr(sourcePtr),
uSize = (IntPtr)source.Length,
Editable = false
};
DeltaInput deltaData = new DeltaInput()
{
lpStart = new IntPtr(deltaPtr),
uSize = (IntPtr)delta.Length,
Editable = false
};
success = ApplyDeltaB(allowPA19 ? DeltaInputFlags.DELTA_APPLY_FLAG_ALLOW_PA19 : DeltaInputFlags.DELTA_FLAG_NONE, sourceData, deltaData, out DeltaOutput outData);
if (!success)
{
sourceData = new DeltaInput()
{
lpStart = IntPtr.Zero,
uSize = IntPtr.Zero,
Editable = false
};
success = ApplyDeltaB(allowPA19 ? DeltaInputFlags.DELTA_APPLY_FLAG_ALLOW_PA19 : DeltaInputFlags.DELTA_FLAG_NONE, sourceData, deltaData, out outData);
if (!success)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
//output = new byte[outData.cbBuf.ToInt32()];
//Marshal.Copy(outData.pBuf, output, 0, output.Length);
//for (int i = 0; i < output.Length; i++)
//{
// output[i] = (byte)Marshal.PtrToStructure(outData.lpStart + i, typeof(byte));
//}
using (FileStream fs = new FileStream(outputPath, FileMode.Create, FileAccess.Write))
{
if (!WriteFile(fs.Handle, outData.pBuf, outData.cbBuf.ToInt32(), out int written, IntPtr.Zero))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
success = DeltaFree(outData.pBuf);
if (!success)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
//File.WriteAllBytes(outputPath, output);
}
public static extern bool GetDeltaInfoB(
DeltaInput Delta,
out DeltaHeaderInfo lpHeaderInfo);
public static extern bool ApplyDeltaB(
DeltaInputFlags ApplyFlags,
DeltaInput Source,
DeltaInput Delta,
out DeltaOutput lpTarget);
