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 && (elemType._type == SimpleTypeKind.WChar || elemType._type == SimpleTypeKind.Char))
{
return(String.Empty);
}
return(new List());
}
MemoryHolder address = _memHolder.ReadMemoryHolder(0);
if (elemType != null && (elemType._type == SimpleTypeKind.WChar || elemType._type == SimpleTypeKind.Char))
{
int elmSize = ((INativeType)elemType).Size;
StringBuilder res = new StringBuilder();
for (int i = start; stop > start ? i <stop : i> stop; i += step)
{
res.Append(
elemType.ReadChar(address, checked (i * elmSize))
);
}
return(res.ToString());
}
else
{
List res = new List((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);
}
}
}
public object this[[NotNull] Slice slice] {
get {
int start, stop, step;
int size = ((ArrayType)NativeType).Length;
SimpleType elemType = ((ArrayType)NativeType).ElementType as SimpleType;
slice.indices(size, out start, out stop, out step);
if ((step > 0 && start >= stop) || (step < 0 && start <= stop))
{
if (elemType != null && (elemType._type == SimpleTypeKind.WChar || elemType._type == SimpleTypeKind.Char))
{
return(String.Empty);
}
return(new PythonList());
}
int n = (int)(step > 0 ? (0L + stop - start + step - 1) / step : (0L + stop - start + step + 1) / step);
if (elemType != null && (elemType._type == SimpleTypeKind.WChar || elemType._type == SimpleTypeKind.Char))
{
int elmSize = ((INativeType)elemType).Size;
StringBuilder res = new StringBuilder(n);
for (int i = 0, index = start; i < n; i++, index += step)
{
char c = elemType.ReadChar(_memHolder, checked (index * elmSize));
res.Append(c);
}
return(res.ToString());
}
else
{
object[] ret = new object[n];
int ri = 0;
for (int i = 0, index = start; i < n; i++, index += step)
{
ret[ri++] = this[index];
}
return(new PythonList(ret));
}
}
set {
int start, stop, step;
int size = ((ArrayType)NativeType).Length;
slice.indices(size, out start, out stop, out step);
int n = (int)(step > 0 ? (0L + stop - start + step - 1) / step : (0L + stop - start + step + 1) / step);
IEnumerator ie = PythonOps.GetEnumerator(value);
for (int i = 0, index = start; i < n; i++, index += step)
{
if (!ie.MoveNext())
{
throw PythonOps.ValueError("sequence not long enough");
}
this[index] = ie.Current;
}
if (ie.MoveNext())
{
throw PythonOps.ValueError("not all values consumed while slicing");
}
}
}