105 lines
2.6 KiB
C#
105 lines
2.6 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace System
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{
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[StructLayout (LayoutKind.Auto)]
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public ref struct ArgIterator
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{
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#pragma warning disable 169, 414
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IntPtr sig;
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IntPtr args;
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int next_arg;
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int num_args;
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#pragma warning restore 169, 414
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[MethodImpl (MethodImplOptions.InternalCall)]
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extern void Setup (IntPtr argsp, IntPtr start);
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public ArgIterator (RuntimeArgumentHandle arglist)
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{
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sig = IntPtr.Zero;
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args = IntPtr.Zero;
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next_arg = num_args = 0;
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if (arglist.args == IntPtr.Zero)
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throw new PlatformNotSupportedException ();
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Setup (arglist.args, IntPtr.Zero);
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}
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[CLSCompliant (false)]
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unsafe public ArgIterator (RuntimeArgumentHandle arglist, void *ptr)
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{
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sig = IntPtr.Zero;
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args = IntPtr.Zero;
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next_arg = num_args = 0;
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if (arglist.args == IntPtr.Zero)
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throw new PlatformNotSupportedException ();
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Setup (arglist.args, (IntPtr) ptr);
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}
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public void End ()
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{
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next_arg = num_args;
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}
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public override bool Equals (object? o)
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{
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throw new NotSupportedException ("ArgIterator does not support Equals.");
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}
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public override int GetHashCode ()
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{
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return sig.GetHashCode ();
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}
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[CLSCompliant (false)]
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public TypedReference GetNextArg ()
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{
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if (num_args == next_arg)
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throw new InvalidOperationException ("Invalid iterator position.");
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TypedReference result = new TypedReference ();
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unsafe {
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IntGetNextArg (&result);
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}
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return result;
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}
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[MethodImpl (MethodImplOptions.InternalCall)]
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extern unsafe void IntGetNextArg (void *res);
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[CLSCompliant (false)]
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public TypedReference GetNextArg (RuntimeTypeHandle rth)
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{
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if (num_args == next_arg)
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throw new InvalidOperationException ("Invalid iterator position.");
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TypedReference result = new TypedReference ();
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unsafe {
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IntGetNextArgWithType (&result, rth.Value);
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}
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return result;
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}
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[MethodImpl (MethodImplOptions.InternalCall)]
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extern unsafe void IntGetNextArgWithType (void *res, IntPtr rth);
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public RuntimeTypeHandle GetNextArgType ()
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{
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if (num_args == next_arg)
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throw new InvalidOperationException ("Invalid iterator position.");
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return new RuntimeTypeHandle (IntGetNextArgType ());
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}
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[MethodImpl (MethodImplOptions.InternalCall)]
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extern IntPtr IntGetNextArgType ();
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public int GetRemainingCount ()
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{
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return num_args - next_arg;
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}
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}
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}
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