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172 lines (138 loc) · 4.72 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;
namespace Python.Runtime {
/// <summary>
/// Represents a generic Python sequence. The methods of this class are
/// equivalent to the Python "abstract sequence API". See
/// http://www.python.org/doc/current/api/sequence.html for details.
/// </summary>
public class PySequence : PyObject, IEnumerable {
protected PySequence(IntPtr ptr) : base(ptr) {}
protected PySequence() : base() {}
/// <summary>
/// IsSequenceType Method
/// </summary>
///
/// <remarks>
/// Returns true if the given object implements the sequence protocol.
/// </remarks>
public static bool IsSequenceType(PyObject value) {
return Runtime.PySequence_Check(value.obj);
}
/// <summary>
/// GetSlice Method
/// </summary>
///
/// <remarks>
/// Return the slice of the sequence with the given indices.
/// </remarks>
public PyObject GetSlice(int i1, int i2) {
IntPtr op = Runtime.PySequence_GetSlice(obj, i1, i2);
if (op == IntPtr.Zero) {
throw new PythonException();
}
return new PyObject(op);
}
/// <summary>
/// SetSlice Method
/// </summary>
///
/// <remarks>
/// Sets the slice of the sequence with the given indices.
/// </remarks>
public void SetSlice(int i1, int i2, PyObject v) {
int r = Runtime.PySequence_SetSlice(obj, i1, i2, v.obj);
if (r < 0) {
throw new PythonException();
}
}
/// <summary>
/// DelSlice Method
/// </summary>
///
/// <remarks>
/// Deletes the slice of the sequence with the given indices.
/// </remarks>
public void DelSlice(int i1, int i2) {
int r = Runtime.PySequence_DelSlice(obj, i1, i2);
if (r < 0) {
throw new PythonException();
}
}
/// <summary>
/// Index Method
/// </summary>
///
/// <remarks>
/// Return the index of the given item in the sequence, or -1 if
/// the item does not appear in the sequence.
/// </remarks>
public int Index(PyObject item) {
int r = Runtime.PySequence_Index(obj, item.obj);
if (r < 0) {
Runtime.PyErr_Clear();
return -1;
}
return r;
}
/// <summary>
/// Contains Method
/// </summary>
///
/// <remarks>
/// Return true if the sequence contains the given item. This method
/// throws a PythonException if an error occurs during the check.
/// </remarks>
public bool Contains(PyObject item) {
int r = Runtime.PySequence_Contains(obj, item.obj);
if (r < 0) {
throw new PythonException();
}
return (r != 0);
}
/// <summary>
/// Concat Method
/// </summary>
///
/// <remarks>
/// Return the concatenation of the sequence object with the passed in
/// sequence object.
/// </remarks>
public PyObject Concat(PyObject other) {
IntPtr op = Runtime.PySequence_Concat(obj, other.obj);
if (op == IntPtr.Zero) {
throw new PythonException();
}
return new PyObject(op);
}
/// <summary>
/// Repeat Method
/// </summary>
///
/// <remarks>
/// Return the sequence object repeated N times. This is equivalent
/// to the Python expression "object * count".
/// </remarks>
public PyObject Repeat(int count) {
IntPtr op = Runtime.PySequence_Repeat(obj, count);
if (op == IntPtr.Zero) {
throw new PythonException();
}
return new PyObject(op);
}
#region IEnumerable Members
public IEnumerator GetEnumerator()
{
return new PyIter(this);
}
#endregion
}
}