SYNCH_OUT and SYNCH_IN reversed on tabs, they didn't work right if the

[unix-history] / usr / src / lib / libcurses / addbytes.c

/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)addbytes.c  5.6 (Berkeley) %G%";
#endif  /* not lint */

#include <curses.h>

#define SYNCH_IN        {y = win->_cury; x = win->_curx;}
#define SYNCH_OUT       {win->_cury = y; win->_curx = x;}

/*
* waddbytes --
*      Add the character to the current position in the given window.
*/
waddbytes(win, bytes, count)
       register WINDOW *win;
       register char *bytes;
       register int count;
{
       static char blanks[] = "        ";
       register int c, newx, x, y;

       SYNCH_IN;
#ifdef DEBUG
       __TRACE("ADDBYTES('%c') at (%d, %d)\n", c, y, x);
#endif
       while (count--) {
               c = *bytes++;
               switch (c) {
               case '\t':
                       SYNCH_OUT;
                       if (waddbytes(win, blanks, 8 - (x % 8)) == ERR)
                               return (ERR);
                       SYNCH_IN;
                       break;

               default:
#ifdef DEBUG
       __TRACE("ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n",
           y, x, win->_firstch[y], win->_lastch[y]);
#endif
                       if (win->_flags & _STANDOUT)
                               c |= _STANDOUT;
#ifdef DEBUG
       __TRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
#endif
                       if (win->_y[y][x] != c) {
                               newx = x + win->_ch_off;
                               if (win->_firstch[y] == _NOCHANGE)
                                       win->_firstch[y] =
                                           win->_lastch[y] = newx;
                               else if (newx < win->_firstch[y])
                                       win->_firstch[y] = newx;
                               else if (newx > win->_lastch[y])
                                       win->_lastch[y] = newx;
#ifdef DEBUG
       __TRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
           win->_firstch[y], win->_lastch[y],
           win->_firstch[y] - win->_ch_off,
           win->_lastch[y] - win->_ch_off);
#endif
                       }
                       win->_y[y][x++] = c;
                       if (x > win->_maxx) {
                               x = 0;
newline:                        if (++y > win->_maxy)
                                       if (win->_scroll) {
                                               SYNCH_OUT;
                                               scroll(win);
                                               SYNCH_IN;
                                               --y;
                                       } else
                                               return (ERR);
                       }
#ifdef DEBUG
       __TRACE("ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n",
           y, x, win->_firstch[y], win->_lastch[y]);
#endif
                       break;
               case '\n':
                       SYNCH_OUT;
                       wclrtoeol(win);
                       SYNCH_IN;
                       if (!NONL)
                               x = 0;
                       goto newline;
               case '\r':
                       x = 0;
                       break;
               case '\b':
                       if (--x < 0)
                               x = 0;
                       break;
               }
       }
       SYNCH_OUT;
       return (OK);
}