os/ossrv/genericopenlibs/cstdlib/LINC/STDARG_E.H
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib.
     1 /*
     2 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
     3 * All rights reserved.
     4 * This component and the accompanying materials are made available
     5 * under the terms of "Eclipse Public License v1.0"
     6 * which accompanies this distribution, and is available
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
     8 *
     9 * Initial Contributors:
    10 * Nokia Corporation - initial contribution.
    11 *
    12 * Contributors:
    13 *
    14 * Description:
    15 * This is all somewhat tortured because ANSI C says that stdio.h is not supposed 
    16 * to define va_list: it needs to have access to that data type, but must not use that name.
    17 * Instead stdio.h should use an __ name, which is safe because it is reserved for 
    18 * the implementation.  Hence __e32_va_list.
    19 * 
    20 *
    21 */
    22 
    23 
    24 
    25 /**
    26  @file
    27  @publishedAll
    28  @released
    29 */
    30 
    31 #ifndef _STDARG_E_H
    32 #define _STDARG_E_H
    33 
    34 /**
    35 EPOC32 definitions, extracted from E32DEFS.H
    36 */
    37 typedef char* __e32_va_list;
    38 
    39 #define va_start(ap,pn) (ap=(__e32_va_list)&pn+((sizeof(pn)+sizeof(int)-1)&~(sizeof(int)-1)),(void)0)
    40 #define va_arg(ap,type) (ap+=((sizeof(type)+sizeof(int)-1)&~(sizeof(int)-1)),(*(type *)(ap-((sizeof(type)+sizeof(int)-1)&~(sizeof(int)-1)))))
    41 #define va_end(ap) (ap=0,(void)0)
    42 
    43 #endif