// Warning: the sourceBytes byte[] will get zeroed out.
public static unsafe byte[] CreatePatch(byte[] sourceBytes, byte[] targetBytes)
{
fixed(byte *pSourceBuf = sourceBytes)
fixed(byte *pTargetBuf = targetBytes)
{
DeltaInput ds = new DeltaInput(pSourceBuf, sourceBytes.Length, true);
DeltaInput dt = new DeltaInput(pTargetBuf, targetBytes.Length, true);
DeltaOutput output;
if (!CreateDeltaB(DeltaFileType.Executable,
DeltaFlag.None,
DeltaFlag.None, // "reset flags"
ds,
dt,
DeltaInput.Empty,
DeltaInput.Empty,
DeltaInput.Empty,
IntPtr.Zero,
AlgId.Crc32FromMsdelta,
out output))
{
throw new Win32Exception();
}
byte[] patchBytes = new byte[output.cbBuf.ToInt32()];
Marshal.Copy(output.pBuf, patchBytes, 0, patchBytes.Length);
DeltaFree(output.pBuf);
return(patchBytes);
}
} // end CreatePatch()
private static extern bool CreateDeltaB(
DeltaFileType fileTypeSet, // File type set.
DeltaFlag setFlags, // Set these flags.
DeltaFlag resetFlags, // Reset (suppress) these flags.
DeltaInput source, // Source memory block.
DeltaInput target, // Target memory block.
DeltaInput sourceOptions, // Memory block with source-specific options.
DeltaInput targetOptions, // Memory block with target-specific options.
DeltaInput globalOptions, // Memory block with global options.
IntPtr targetFileTime, // Target file time to use, null to use current time. (need this overload because the compiler can't convert from "null" to "ref FILETIME")
AlgId hashAlgId,
out DeltaOutput delta);
private static extern bool CreateDeltaB(
DeltaFileType fileTypeSet, // File type set.
DeltaFlag setFlags, // Set these flags.
DeltaFlag resetFlags, // Reset (suppress) these flags.
DeltaInput source, // Source memory block.
DeltaInput target, // Target memory block.
DeltaInput sourceOptions, // Memory block with source-specific options.
DeltaInput targetOptions, // Memory block with target-specific options.
DeltaInput globalOptions, // Memory block with global options.
ref System.Runtime.InteropServices.ComTypes.FILETIME targetFileTime, // Target file time to use, null to use current time.
AlgId hashAlgId,
out DeltaOutput delta);
public static unsafe byte[] ApplyPatch(byte[] sourceBytes, byte[] patchBytes)
{
fixed(byte *pSourceBuf = sourceBytes)
fixed(byte *pPatchBuf = patchBytes)
{
var ds = new DeltaInput(pSourceBuf, sourceBytes.Length, true);
var dp = new DeltaInput(pPatchBuf, patchBytes.Length, true);
if (!ApplyDeltaB(DeltaApplyFlag.None, ds, dp, out var output))
{
throw new Win32Exception();
}
var targetBytes = new byte[output.cbBuf.ToInt32()];
Marshal.Copy(output.pBuf, targetBytes, 0, targetBytes.Length);
DeltaFree(output.pBuf);
return(targetBytes);
}
}
public static unsafe byte[] ApplyPatch(byte[] sourceBytes, byte[] patchBytes)
{
fixed (byte* pSourceBuf = sourceBytes)
fixed (byte* pPatchBuf = patchBytes)
{
DeltaInput ds = new DeltaInput(pSourceBuf, sourceBytes.Length, true);
DeltaInput dp = new DeltaInput(pPatchBuf, patchBytes.Length, true);
if (!ApplyDeltaB(DeltaApplyFlag.None,
ds,
dp,
out var output))
{
throw new Win32Exception();
}
byte[] targetBytes = new byte[output.cbBuf.ToInt32()];
Marshal.Copy(output.pBuf, targetBytes, 0, targetBytes.Length);
DeltaFree(output.pBuf);
return targetBytes;
}
}
private static extern bool ApplyDeltaB(
DeltaApplyFlag applyFlags,
DeltaInput source,
DeltaInput delta,
out DeltaOutput target);
private static extern bool ApplyDeltaB(
DeltaApplyFlag applyFlags,
DeltaInput source,
DeltaInput delta,
out DeltaOutput target
);
