public object this[Slice /*!*/ slice] {
get {
lock (this) {
List <byte> res = _bytes.Slice(slice);
if (res == null)
{
return(new ByteArray());
}
return(new ByteArray(res));
}
}
set {
if (slice == null)
{
throw PythonOps.TypeError("bytearray indices must be integer or slice, not None");
}
// get a list of the bytes we're going to assign into the slice. We accept:
// integers, longs, etc... - fill in an array of 0 bytes
// list of bytes, indexables, etc...
IList <byte> list = value as IList <byte>;
if (list == null)
{
int?iVal = null;
if (value is int)
{
iVal = (int)value;
}
else if (value is Extensible <int> )
{
iVal = ((Extensible <int>)value).Value;
}
else if (value is BigInteger)
{
int intval;
if (((BigInteger)value).AsInt32(out intval))
{
iVal = intval;
}
}
if (iVal != null)
{
List <byte> newlist = new List <byte>();
newlist.Capacity = iVal.Value;
for (int i = 0; i < iVal; i++)
{
newlist.Add(0);
}
list = newlist;
}
else
{
IEnumerator ie = PythonOps.GetEnumerator(value);
list = new List <byte>();
while (ie.MoveNext())
{
list.Add(GetByte(ie.Current));
}
}
}
lock (this) {
if (slice.step != null)
{
// try to assign back to self: make a copy first
if (this == list)
{
value = CopyThis();
}
else if (list.Count == 0)
{
DeleteItem(slice);
return;
}
IList <byte> castedVal = GetBytes(value);
int start, stop, step;
slice.indices(_bytes.Count, out start, out stop, out step);
int n = (step > 0 ? (stop - start + step - 1) : (stop - start + step + 1)) / step;
// we don't use slice.Assign* helpers here because bytearray has different assignment semantics.
if (list.Count < n)
{
throw PythonOps.ValueError("too few items in the enumerator. need {0} have {1}", n, castedVal.Count);
}
for (int i = 0, index = start; i < castedVal.Count; i++, index += step)
{
if (i >= n)
{
if (index == _bytes.Count)
{
_bytes.Add(castedVal[i]);
}
else
{
_bytes.Insert(index, castedVal[i]);
}
}
else
{
_bytes[index] = castedVal[i];
}
}
}
else
{
int start, stop, step;
slice.indices(_bytes.Count, out start, out stop, out step);
SliceNoStep(start, stop, list);
}
}
}
}