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*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System.Collections.Generic;
using System.Globalization;
namespace System.Management.Automation.Interpreter
{
internal sealed class LoadObjectInstruction : Instruction
{
private readonly object _value;
internal LoadObjectInstruction(object value)
{
_value = value;
}
public override int ProducedStack { get { return 1; } }
public override int Run(InterpretedFrame frame)
{
frame.Data[frame.StackIndex++] = _value;
return +1;
}
public override string ToString()
{
return "LoadObject(" + (_value ?? "null") + ")";
}
}
internal sealed class LoadCachedObjectInstruction : Instruction
{
private readonly uint _index;
internal LoadCachedObjectInstruction(uint index)
{
_index = index;
}
public override int ProducedStack { get { return 1; } }
public override int Run(InterpretedFrame frame)
{
frame.Data[frame.StackIndex++] = frame.Interpreter._objects[_index];
return +1;
}
public override string ToDebugString(int instructionIndex, object cookie, Func<int, int> labelIndexer, IList<object> objects)
{
return string.Format(CultureInfo.InvariantCulture, "LoadCached({0}: {1})", _index, objects[(int)_index]);
}
public override string ToString()
{
return "LoadCached(" + _index + ")";
}
}
internal sealed class PopInstruction : Instruction
{
internal static readonly PopInstruction Instance = new PopInstruction();
private PopInstruction() { }
public override int ConsumedStack { get { return 1; } }
public override int Run(InterpretedFrame frame)
{
frame.Pop();
return +1;
}
public override string ToString()
{
return "Pop()";
}
}
internal sealed class DupInstruction : Instruction
{
internal static readonly DupInstruction Instance = new DupInstruction();
private DupInstruction() { }
public override int ConsumedStack { get { return 0; } }
public override int ProducedStack { get { return 1; } }
public override int Run(InterpretedFrame frame)
{
frame.Data[frame.StackIndex++] = frame.Peek();
return +1;
}
public override string ToString()
{
return "Dup()";
}
}
}
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