tu2_console.c

小型操作系统,以VC为开发环境,需要boachs调试

/***************************************************************************
**     File name   : tu2_console.c
**     Author      : x.cheng
**     Create date :
**
**	   Comment:
**        Consoles managemet operators...
**
**     Revisions:
**     $Log: tu2_console.c,v $
**     Revision 1.1.1.1  2005/07/27 06:53:15  x.cheng
**     add into repositories
**
**
***************************************************************************/
#include "const.h"
#include "type.h"
#include "stdarg.h"
#include "string.h"

#include "..\..\Inc\i386\io.h"
#include "..\..\Inc\vga.h"
#include "..\..\Inc\keyb.h"
#include "..\..\Inc\tui.h"
#include "..\..\Inc\vmm.h"
#include "..\..\Inc\mts.h"


#include "..\inc\def_tui.h"

/* debug preprocessor instrument
	#ifdef _DEBUG__
	#ifdef _DEBUG_TUI__
				
	#endif
	#endif	
***************************/
/*********************************************
 * global variable declaration
 *********************************************/
extern ts_Console g_astVirtualConsole[TOTAL_VIRTUAL_CONSOLE_NB+1];	//(console #0 is the special console).

extern int g_iCurrentConsoleIndex;	//index of current console.

/************************************************************
*************************************************************
**      Function Name:			pstTu2GetConsoleAddress
**      Author:                 x.cheng
**
**      Comment:
**			Get the address of a console structure.
**
**      List of parameters:
**			iIndex	- the console id.
**
**      Return value:   
**          the address of the console structure.
**			error: NULL if the console iWhich does not exists
**      Revisions:
**		
*************************************************************
*************************************************************/
ts_Console *pstTu2GetConsoleAddress(int iIndex)
{
	if ( (iIndex>=0) && (iIndex<=TOTAL_VIRTUAL_CONSOLE_NB) )
		return( (ts_Console *)(&g_astVirtualConsole[iIndex]) );

	return ( (ts_Console*)NULL );
}



/************************************************************
*************************************************************
**      Function Name:			iTu2SetCurrentConsole
**      Author:                 x.cheng
**
**      Comment:
**			Set the current console.
**
**      List of parameters:
**			iIndex - The console index to set as current console.
**
**      Return value:   
**			TRUE - iIndex is a valid console id.       
**			FALSE - is not a valid console id.
**
**      Revisions:
**		
*************************************************************
*************************************************************/
int iTu2SetCurrentConsole(int iIndex)
{
	
	if ( (iIndex > 0) && (iIndex <= TOTAL_VIRTUAL_CONSOLE_NB) )
		g_iCurrentConsoleIndex = iIndex;
	else
		return(FALSE);

	return(TRUE);

}
//----------------------------------------
int iTu2GetCurrentConsole()
{
	return ( g_iCurrentConsoleIndex );
}
/************************************************************
*************************************************************
**      Function Name:			iTu2SwitchToConsole
**      Author:                 x.cheng
**
**      Comment:
**			Clear the screen.
**
**      List of parameters:
**			no
**
**      Return value:   
**			TRUE - iIndex is a valid console id.       
**			FALSE - is not a valid console id.
**
**      Revisions:
**		
*************************************************************
*************************************************************/
int iTu2SwitchToConsole(int iIndex)
{
	if ( iIndex == g_iCurrentConsoleIndex )	return (TRUE);	// Attempt to switch to the current console

	if ( iIndex > TOTAL_VIRTUAL_CONSOLE_NB )	return (FALSE);

	// Copy old console parameters from video memory
	memcpy(g_astVirtualConsole[g_iCurrentConsoleIndex].puiVideoBuffer, 
		   g_astVirtualConsole[0].puiVideoBuffer, VIDEO_BUFFER_SIZE);

	g_astVirtualConsole[g_iCurrentConsoleIndex].uiCurrentPos = g_astVirtualConsole[0].uiCurrentPos;
	g_astVirtualConsole[g_iCurrentConsoleIndex].ucCurrentColor = g_astVirtualConsole[0].ucCurrentColor;

	if ( iTu2SetCurrentConsole(iIndex) )
	{
		// Set new console parameters to the video memory	//
		memcpy(g_astVirtualConsole[0].puiVideoBuffer, 
			   g_astVirtualConsole[iIndex].puiVideoBuffer, VIDEO_BUFFER_SIZE);
		iVgaConsoleSetPos( (ts_Console *)(&g_astVirtualConsole[0]), g_astVirtualConsole[iIndex].uiCurrentPos );
		vVgaConsoleSetColor( (ts_Console *)(&g_astVirtualConsole[0]), g_astVirtualConsole[iIndex].ucCurrentColor );

		// Set keyboard parameters of the new selected console	//
		vKeybUpdateLeds(g_astVirtualConsole[g_iCurrentConsoleIndex].ucLedState);

		return( TRUE );
	}
	return( FALSE );
}