public static ObjectPatch GeneratePatch(byte[] org, byte[] mod, int chunk_size)
{
ObjectPatch op = new ObjectPatch();
List <MemPatch> lp = new List <MemPatch>();
int min_length = Math.Min(org.Length, mod.Length);
for (int i = 0; i < min_length; i += chunk_size)
{
int remainder = min_length - i;
int chunk = Math.Min(remainder, chunk_size);
if (!CompareChunk(org, mod, i, chunk))
{
MemPatch mp = new MemPatch(chunk, i);
Buffer.BlockCopy(mod, i, mp.data, 0, chunk);
lp.Add(mp);
}
}
op.patchedLength = mod.Length;
if (op.patchedLength > org.Length)
{
int diffLength = op.patchedLength - org.Length;
MemPatch mp = new MemPatch(diffLength, org.Length);
Buffer.BlockCopy(mod, org.Length, mp.data, 0, diffLength);
lp.Add(mp);
}
Console.WriteLine("Found {0} deltas.", lp.Count);
op.patches = lp.ToArray();
return(op);
}
public static byte[] ApplyPatch(byte[] org, ObjectPatch patch)
{
byte[] mod = new byte[patch.patchedLength];
int min_length = Math.Min(patch.patchedLength, org.Length);
Buffer.BlockCopy(org, 0, mod, 0, min_length);
for (int i = 0; i < patch.patches.Length; ++i)
{
MemPatch mp = patch.patches[i];
Buffer.BlockCopy(mp.data, 0, mod, (int)mp.offset, (int)mp.length);
}
return(mod);
}
