mirror of
https://github.com/SSCLI/sscli_20021101
synced 2026-06-08 12:28:57 +00:00
yallie
116 lines
4.5 KiB
C#
116 lines
4.5 KiB
C#
// ==++==
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//
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//
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// Copyright (c) 2002 Microsoft Corporation. All rights reserved.
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//
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// The use and distribution terms for this software are contained in the file
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// named license.txt, which can be found in the root of this distribution.
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// By using this software in any fashion, you are agreeing to be bound by the
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// terms of this license.
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//
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// You must not remove this notice, or any other, from this software.
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//
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//
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// ==--==
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namespace System {
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using System;
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using System.Runtime.InteropServices;
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using System.Runtime.CompilerServices;
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// This class will not be marked serializable
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator"]/*' />
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[StructLayout(LayoutKind.Auto)]
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public struct ArgIterator
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{
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// create an arg iterator that points at the first argument that
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// is not statically declared (that is the first ... arg)
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// 'arglist' is the value returned by the ARGLIST instruction
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.ArgIterator"]/*' />
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public extern ArgIterator(RuntimeArgumentHandle arglist);
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// create an arg iterator that points just past 'firstArg'.
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// 'arglist' is the value returned by the ARGLIST instruction
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// This is much like the C va_start macro
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.ArgIterator1"]/*' />
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[MethodImplAttribute(MethodImplOptions.InternalCall), CLSCompliant(false)]
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public unsafe extern ArgIterator(RuntimeArgumentHandle arglist, void* ptr);
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// Fetch an argument as a typed referece, advance the iterator.
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// Throws an exception if past end of argument list
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.GetNextArg"]/*' />
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[MethodImplAttribute(MethodImplOptions.InternalCall), CLSCompliant(false)]
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public extern TypedReference GetNextArg();
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// Alternate version of GetNextArg() intended primarily for IJW code
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// generated by VC's "va_arg()" construct.
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.GetNextArg1"]/*' />
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[CLSCompliant(false)]
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public TypedReference GetNextArg(RuntimeTypeHandle rth)
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{
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if (SigPtr != IntPtr.Zero)
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{
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// This is an ordinary ArgIterator capable of determining
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// types from a signature. Just do a regular GetNextArg.
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return GetNextArg();
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}
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else
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{
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return InternalGetNextArg(rth);
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}
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}
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[MethodImplAttribute(MethodImplOptions.InternalCall), CLSCompliant(false)]
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private extern TypedReference InternalGetNextArg(RuntimeTypeHandle rth);
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// Invalidate the iterator (va_end)
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.End"]/*' />
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public void End()
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{
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}
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// How many arguments are left in the list
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.GetRemainingCount"]/*' />
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public extern int GetRemainingCount();
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// Gets the type of the current arg, does NOT advance the iterator
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.GetNextArgType"]/*' />
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[MethodImplAttribute(MethodImplOptions.InternalCall)]
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public extern RuntimeTypeHandle GetNextArgType();
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.GetHashCode"]/*' />
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public override int GetHashCode()
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{
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return unchecked((int)((long)ArgCookie));
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}
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// Inherited from object
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/// <include file='doc\ArgIterator.uex' path='docs/doc[@for="ArgIterator.Equals"]/*' />
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public override bool Equals(Object o)
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{
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throw new NotSupportedException(Environment.GetResourceString("NotSupported_NYI"));
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}
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private IntPtr ArgCookie; // Cookie from the EE.
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private IntPtr SigPtr; // Pointer to remaining signature.
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private IntPtr ArgPtr; // Pointer to remaining args.
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private int RemainingArgs; // # of remaining args.
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//
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// This is just designed to prevent compiler warnings.
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// This field is used from native, but we need to prevent the compiler warnings.
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//
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#if _DEBUG
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private void DontTouchThis() {
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ArgCookie = IntPtr.Zero;
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SigPtr = IntPtr.Zero;
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ArgPtr = IntPtr.Zero;
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RemainingArgs = 0;
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}
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#endif
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}
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}
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