winnstr.c

操作系统SunOS 4.1.3版本的源码

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ifndef lint
static	char sccsid[] = "@(#)winnstr.c 1.1 92/07/30 SMI"; /* from S5R3.1 1.3 */
#endif

#include	"curses_inc.h"

/*
 * Copy n chars in window win from current cursor position to end
 * of window into char buffer str.  Return the number of chars copied.
 */

winnstr(win, str, ncols)
register	WINDOW	*win;
register	char	*str;
register	int	ncols;
{
    register	int	counter = 0;
    int			cy = win->_cury;
    register	chtype	*ptr = &(win->_y[cy][win->_curx]),
			*pmax = &(win->_y[cy][win->_maxx]);

    if (ncols == -1)
	ncols = MAXINT;

    while (counter < ncols)
    {
	str[counter++] = *ptr++ & A_CHARTEXT;

	if (ptr == pmax)
	{
	    if (++cy == win->_maxy)
		break;

	    ptr = &(win->_y[cy][0]);
	    pmax = ptr + win->_maxx;
	}
    }
    str[counter] = '\0';
    return (counter);
}