MegaBites-AI/Windows-powershell

1/* ****************************************************************************2 *3 * Copyright (c) Microsoft Corporation.4 *5 * This source code is subject to terms and conditions of the Apache License, Version 2.0. A6 * copy of the license can be found in the License.html file at the root of this distribution. If7 * you cannot locate the Apache License, Version 2.0, please send an email to8 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound9 * by the terms of the Apache License, Version 2.0.10 *11 * You must not remove this notice, or any other, from this software.12 *13 *14 * ***************************************************************************/15 16using System.Runtime.CompilerServices;17 18namespace System.Management.Automation.Interpreter19{20    internal sealed partial class DynamicInstructionN : Instruction21    {22        private readonly CallInstruction _target;23        private readonly object _targetDelegate;24        private readonly CallSite _site;25        private readonly int _argumentCount;26        private readonly bool _isVoid;27 28        public DynamicInstructionN(Type delegateType, CallSite site)29        {30            var methodInfo = delegateType.GetMethod("Invoke");31            var parameters = methodInfo.GetParameters();32 33            _target = CallInstruction.Create(methodInfo, parameters);34            _site = site;35            _argumentCount = parameters.Length - 1;36            _targetDelegate = site.GetType().GetField("Target").GetValue(site);37        }38 39        public DynamicInstructionN(Type delegateType, CallSite site, bool isVoid)40            : this(delegateType, site)41        {42            _isVoid = isVoid;43        }44 45        public override int ProducedStack { get { return _isVoid ? 0 : 1; } }46 47        public override int ConsumedStack { get { return _argumentCount; } }48 49        public override int Run(InterpretedFrame frame)50        {51            int first = frame.StackIndex - _argumentCount;52            object[] args = new object[1 + _argumentCount];53            args[0] = _site;54            for (int i = 0; i < _argumentCount; i++)55            {56                args[1 + i] = frame.Data[first + i];57            }58 59            object ret = _target.InvokeInstance(_targetDelegate, args);60            if (_isVoid)61            {62                frame.StackIndex = first;63            }64            else65            {66                frame.Data[first] = ret;67                frame.StackIndex = first + 1;68            }69 70            return 1;71        }72 73        public override string ToString()74        {75            return "DynamicInstructionN(" + _site + ")";76        }77    }78}79