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arrayobject.cs
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248 lines (203 loc) · 7.04 KB
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using System;
using System.Collections;
namespace Python.Runtime
{
/// <summary>
/// Implements a Python type for managed arrays. This type is essentially
/// the same as a ClassObject, except that it provides sequence semantics
/// to support natural array usage (indexing) from Python.
/// </summary>
internal class ArrayObject : ClassBase
{
internal ArrayObject(Type tp) : base(tp)
{
}
internal override bool CanSubclass()
{
return false;
}
public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw)
{
var self = GetManagedObject(tp) as ArrayObject;
if (Runtime.PyTuple_Size(args) != 1)
{
return Exceptions.RaiseTypeError("array expects 1 argument");
}
IntPtr op = Runtime.PyTuple_GetItem(args, 0);
object result;
if (!Converter.ToManaged(op, self.type, out result, true))
{
return IntPtr.Zero;
}
return CLRObject.GetInstHandle(result, tp);
}
/// <summary>
/// Implements __getitem__ for array types.
/// </summary>
public static IntPtr mp_subscript(IntPtr ob, IntPtr idx)
{
var obj = (CLRObject)GetManagedObject(ob);
var items = obj.inst as Array;
Type itemType = obj.inst.GetType().GetElementType();
int rank = items.Rank;
int index;
object value;
// Note that CLR 1.0 only supports int indexes - methods to
// support long indices were introduced in 1.1. We could
// support long indices automatically, but given that long
// indices are not backward compatible and a relative edge
// case, we won't bother for now.
// Single-dimensional arrays are the most common case and are
// cheaper to deal with than multi-dimensional, so check first.
if (rank == 1)
{
index = Runtime.PyInt_AsLong(idx);
if (Exceptions.ErrorOccurred())
{
return Exceptions.RaiseTypeError("invalid index value");
}
if (index < 0)
{
index = items.Length + index;
}
try
{
value = items.GetValue(index);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return IntPtr.Zero;
}
return Converter.ToPython(value, itemType);
}
// Multi-dimensional arrays can be indexed a la: list[1, 2, 3].
if (!Runtime.PyTuple_Check(idx))
{
Exceptions.SetError(Exceptions.TypeError, "invalid index value");
return IntPtr.Zero;
}
var count = Runtime.PyTuple_Size(idx);
var args = new int[count];
for (var i = 0; i < count; i++)
{
IntPtr op = Runtime.PyTuple_GetItem(idx, i);
index = Runtime.PyInt_AsLong(op);
if (Exceptions.ErrorOccurred())
{
return Exceptions.RaiseTypeError("invalid index value");
}
if (index < 0)
{
index = items.GetLength(i) + index;
}
args.SetValue(index, i);
}
try
{
value = items.GetValue(args);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return IntPtr.Zero;
}
return Converter.ToPython(value, itemType);
}
/// <summary>
/// Implements __setitem__ for array types.
/// </summary>
public static int mp_ass_subscript(IntPtr ob, IntPtr idx, IntPtr v)
{
var obj = (CLRObject)GetManagedObject(ob);
var items = obj.inst as Array;
Type itemType = obj.inst.GetType().GetElementType();
int rank = items.Rank;
int index;
object value;
if (items.IsReadOnly)
{
Exceptions.RaiseTypeError("array is read-only");
return -1;
}
if (!Converter.ToManaged(v, itemType, out value, true))
{
return -1;
}
if (rank == 1)
{
index = Runtime.PyInt_AsLong(idx);
if (Exceptions.ErrorOccurred())
{
Exceptions.RaiseTypeError("invalid index value");
return -1;
}
if (index < 0)
{
index = items.Length + index;
}
try
{
items.SetValue(value, index);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return -1;
}
return 0;
}
if (!Runtime.PyTuple_Check(idx))
{
Exceptions.RaiseTypeError("invalid index value");
return -1;
}
var count = Runtime.PyTuple_Size(idx);
var args = new int[count];
for (var i = 0; i < count; i++)
{
IntPtr op = Runtime.PyTuple_GetItem(idx, i);
index = Runtime.PyInt_AsLong(op);
if (Exceptions.ErrorOccurred())
{
Exceptions.RaiseTypeError("invalid index value");
return -1;
}
if (index < 0)
{
index = items.GetLength(i) + index;
}
args.SetValue(index, i);
}
try
{
items.SetValue(value, args);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return -1;
}
return 0;
}
/// <summary>
/// Implements __contains__ for array types.
/// </summary>
public static int sq_contains(IntPtr ob, IntPtr v)
{
var obj = (CLRObject)GetManagedObject(ob);
Type itemType = obj.inst.GetType().GetElementType();
var items = obj.inst as IList;
object value;
if (!Converter.ToManaged(v, itemType, out value, false))
{
return 0;
}
if (items.Contains(value))
{
return 1;
}
return 0;
}
}
}