public object this[int index] {
get {
INativeType type = ((PointerType)NativeType)._type;
MemoryHolder address = MemHolder.ReadMemoryHolder(0);
return(type.GetValue(address, this, checked (type.Size * index), false));
}
set {
MemoryHolder address = MemHolder.ReadMemoryHolder(0);
INativeType type = ((PointerType)NativeType)._type;
object keepAlive = type.SetValue(address, checked (type.Size * index), value);
if (keepAlive != null)
{
MemHolder.AddObject(index.ToString(), keepAlive);
}
}
}
public object this[Slice index] {
get {
if (index.stop == null)
{
throw PythonOps.ValueError("slice stop is required");
}
int start = index.start != null ? (int)index.start : 0;
int stop = index.stop != null ? (int)index.stop : 0;
int step = index.step != null ? (int)index.step : 1;
if (step < 0 && index.start == null)
{
throw PythonOps.ValueError("slice start is required for step < 0");
}
if (start < 0)
{
start = 0;
}
INativeType type = ((PointerType)NativeType)._type;
SimpleType elemType = type as SimpleType;
if ((stop < start && step > 0) || (start < stop && step < 0))
{
if (elemType != null)
{
if (elemType._type == SimpleTypeKind.Char)
{
return(Bytes.Empty);
}
if (elemType._type == SimpleTypeKind.WChar)
{
return(string.Empty);
}
}
return(new PythonList());
}
MemoryHolder address = MemHolder.ReadMemoryHolder(0);
if (elemType != null)
{
if (elemType._type == SimpleTypeKind.Char)
{
Debug.Assert(((INativeType)elemType).Size == 1);
var sb = new MemoryStream();
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
sb.WriteByte(address.ReadByte(i));
}
return(Bytes.Make(sb.ToArray()));
}
if (elemType._type == SimpleTypeKind.WChar)
{
int elmSize = ((INativeType)elemType).Size;
var sb = new StringBuilder();
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
sb.Append((char)address.ReadInt16(checked (i * elmSize)));
}
return(sb.ToString());
}
}
PythonList res = new PythonList((stop - start) / step);
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
res.AddNoLock(
type.GetValue(address, this, checked (type.Size * i), false)
);
}
return(res);
}
}