dsxcmd.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 236 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
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    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
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <string.h>
#include <ctype.h>
#include <watcom.h>
#include "dbgdefn.h"
#include "farptrs.h"
#include "dbgscrn.h"
#include "dbgio.h"
#include "dbgreg.h"
#include "dbgname.h"
#include "dbgtoggl.h"
#include "dbgwind.h"
#include "dpmi.h"


#define MAX_CMDLINE_LEN         128
#define PSP_CMDTAIL_OFF         0x80


extern unsigned                 Lookup( char *, char *, unsigned );
extern void                     ForceLines( unsigned );
extern bool                     HasEquals( void );
extern unsigned                 GetValue( void );
extern unsigned long            GetMemory( void );
extern void                     StartupErr( char * );


extern unsigned_8               DPMICheck;
extern flip_types               FlipMech;
extern mode_types               ScrnMode;
extern addr_seg                 _psp;
extern unsigned                 CheckSize;
extern unsigned long            MemSize;

static char                     *CmdStart;

static char SysOptNameTab[] = {
    "Monochrome\0"
    "Color\0"
    "Colour\0"
    "Ega43\0"
    "Vga50\0"
    "Overwrite\0"
    "Page\0"
    "Swap\0"
    "Two\0"
    "CHecksize\0"
    "NOCHarremap\0"
    "NOGraphicsmouse\0"
    "Heapenable\0"
    "XXNODPMI\0"                /* DON'T DOCUMENT: Internal use only */
    "XXDPMI\0"                  /* DON'T DOCUMENT: Internal use only */
};

enum {
    OPT_MONO = 1,
   OPT_COLOR,
   OPT_COLOUR,
   OPT_EGA43,
   OPT_VGA50,

   OPT_OVERWRITE,
   OPT_PAGE,
   OPT_SWAP,
   OPT_TWO,

   OPT_CHECKSIZE,

   OPT_NOREMAP,
   OPT_NOGMOUSE,
   OPT_HEAPENABLE,
   OPT_XXNODPMI,
   OPT_XXDPMI,
};

gui_window_styles WndStyle = GUI_PLAIN+GUI_GMOUSE;


static void GetLines( void )
{
    if( HasEquals() ) {
        ForceLines( GetValue() );
    }
}

bool OptDelim( char ch )
{
    return( ch == '/' || ch == '-' );
}


void SetNumLines( int num )
{
    if( num >= 43 ) {
        ScrnMode = MD_EGA;
    }
}

void SetNumColumns( int num )
{
    num=num;
}

/*
 * ProcSysOption -- process system option
 */

bool ProcSysOption( char *start, unsigned len, int pass )
{
    unsigned long   num;

    pass=pass;
    switch( Lookup( SysOptNameTab, start, len ) ) {
    case OPT_MONO:
        ScrnMode = MD_MONO;
        GetLines();
        break;
    case OPT_COLOR:
    case OPT_COLOUR:
        ScrnMode = MD_COLOUR;
        GetLines();
        break;
    case OPT_EGA43:
    case OPT_VGA50:
        ScrnMode = MD_EGA;
        break;
    case OPT_OVERWRITE:
        FlipMech = FLIP_OVERWRITE;
        break;
    case OPT_PAGE:
        FlipMech = FLIP_PAGE;
        break;
    case OPT_SWAP:
        FlipMech = FLIP_SWAP;
        WndStyle &= ~( GUI_CHARMAP_MOUSE|GUI_CHARMAP_DLG);
        break;
    case OPT_TWO:
        FlipMech = FLIP_TWO;
        break;
    case OPT_NOREMAP:
        WndStyle &= ~GUI_CHARMAP_DLG;
        break;
    case OPT_NOGMOUSE:
        WndStyle &= ~GUI_CHARMAP_MOUSE;
        break;
    case OPT_CHECKSIZE:
        num = GetMemory();
        if( num < 32*1024UL ) num = 32*1024UL;
        if( num > 640*1024UL ) num = 640*1024UL;
        CheckSize = num / 16; /* Checksize is in paragraphs */
        break;
    case OPT_HEAPENABLE:
        _SwitchOn( SW_KEEP_HEAP_ENABLED );
        break;
    case OPT_XXNODPMI:
        DPMICheck = 1;
        break;
    case OPT_XXDPMI:
        DPMICheck = 2;
        break;
    default:
        return( FALSE );
    }
    return( TRUE );
}


/*
 * ProcSysOptInit -- initial system options
 */

void ProcSysOptInit( void )
{
    char                *ptr;

    CheckSize = 0;
    ScrnMode = MD_DEFAULT;
    FlipMech = FLIP_TWO;
    MemSize = 2L*1024*1024;

#ifdef __OSI__
    {
        extern char *_LpCmdLine;
        CmdStart = _LpCmdLine;
        ptr = ptr;
    }
#else
    ptr = (char *)( (unsigned_8 *)DPMIGetSegmentBaseAddress( _psp ) + PSP_CMDTAIL_OFF );
    ptr[ *(unsigned_8 *)ptr + 1 ] = NULLCHAR;
    CmdStart = (char *)( (unsigned_8 *)ptr + 1 );
#endif
}


char *GetCmdArg( int num )
{
    return( num ? NULL : CmdStart );
}

void SetCmdArgStart( int num, char *ptr )
{
    num = num; /* must be zero */
    CmdStart = ptr;
}