public HexBoxUndoCommand(HexBox hexBox, HexBoxPosition origCaretPos, ulong offset, byte[] origData, string descr)
{
this.doc = hexBox.Document;
this.hexBoxWeakRef = new WeakReference(hexBox);
this.origCaretPos = origCaretPos;
this.newCaretPos = hexBox.CaretPosition;
this.offset = offset;
this.origData = origData;
this.newData = doc.Read(offset, origData.Length);
this.descr = descr;
this.canExecute = false;
}
static void Write(HexDocument doc, Stream target, ulong start, ulong end)
{
const int MAX_BUFFER_LENGTH = 1024 * 64;
byte[] buffer = new byte[end - start >= MAX_BUFFER_LENGTH ? MAX_BUFFER_LENGTH : (int)(end - start + 1)];
ulong offs = start;
while (offs <= end) {
ulong bytesLeft = offs == 0 && end == ulong.MaxValue ? ulong.MaxValue : end - offs + 1;
int bytesToRead = bytesLeft >= (ulong)buffer.Length ? buffer.Length : (int)bytesLeft;
doc.Read(offs, buffer, 0, bytesToRead);
target.Write(buffer, 0, bytesToRead);
ulong nextOffs = offs + (ulong)bytesToRead;
if (nextOffs < offs)
break;
offs = nextOffs;
}
}
