swchar.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 56 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


#include "disasm.h"

#if defined( __DOS__ )
extern  unsigned char     _DOS_Switch_Char();

#pragma aux     _DOS_Switch_Char = \
                        0x52            /* push dx */\
                        0xb8 0x00 0x37  /* mov ax,0x3700 */\
                        0xcd 0x21       /* int 21h       */\
                        0x88 0xd0       /* mov al,dl     */\
                        0x5a            /* pop dx        */;
#endif

int _dos_switch_char()
    {
#if defined( __DOS__ )
        return( _DOS_Switch_Char() );
#elif defined( __OS2__ ) || defined( __NT__ )
        return( '/' );
#elif defined( __QNX__ )
        return( '-' );
#endif
    }