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Copy patharrayobject.cs
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executable file
·260 lines (201 loc) · 6.84 KB
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// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================
using System;
using System.Collections;
using System.Reflection;
using System.Runtime.InteropServices;
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;
}
[CallConvCdecl()]
public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw) {
ArrayObject 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);
string message = "cannot instantiate array wrapper";
return Exceptions.RaiseTypeError(message);
}
//====================================================================
// Implements __getitem__ for array types.
//====================================================================
[CallConvCdecl()]
public static IntPtr mp_subscript(IntPtr ob, IntPtr idx) {
CLRObject obj = (CLRObject)ManagedType.GetManagedObject(ob);
Array items = obj.inst as Array;
Type itemType = obj.inst.GetType().GetElementType();
int rank = items.Rank;
int index = 0;
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 = (int)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(items.GetValue(index), 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;
}
int count = Runtime.PyTuple_Size(idx);
Array args = Array.CreateInstance(typeof(Int32), count);
for (int i = 0; i < count; i++) {
IntPtr op = Runtime.PyTuple_GetItem(idx, i);
index = (int)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((int[]) args);
}
catch (IndexOutOfRangeException) {
Exceptions.SetError(Exceptions.IndexError,
"array index out of range"
);
return IntPtr.Zero;
}
return Converter.ToPython(value, itemType);
}
//====================================================================
// Implements __setitem__ for array types.
//====================================================================
[CallConvCdecl()]
public static int mp_ass_subscript(IntPtr ob, IntPtr idx, IntPtr v) {
CLRObject obj = (CLRObject)ManagedType.GetManagedObject(ob);
Array items = obj.inst as Array;
Type itemType = obj.inst.GetType().GetElementType();
int rank = items.Rank;
int index = 0;
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 = (int)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;
}
int count = Runtime.PyTuple_Size(idx);
Array args = Array.CreateInstance(typeof(Int32), count);
for (int i = 0; i < count; i++) {
IntPtr op = Runtime.PyTuple_GetItem(idx, i);
index = (int)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, (int[])args);
}
catch (IndexOutOfRangeException) {
Exceptions.SetError(Exceptions.IndexError,
"array index out of range"
);
return -1;
}
return 0;
}
//====================================================================
// Implements __contains__ for array types.
//====================================================================
[CallConvCdecl()]
public static int sq_contains(IntPtr ob, IntPtr v) {
CLRObject obj = (CLRObject)ManagedType.GetManagedObject(ob);
Type itemType = obj.inst.GetType().GetElementType();
IList 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;
}
//====================================================================
// Implements __len__ for array types.
//====================================================================
[CallConvCdecl()]
public static int mp_length(IntPtr ob) {
CLRObject self = (CLRObject)ManagedType.GetManagedObject(ob);
Array items = self.inst as Array;
return items.Length;
}
}
}