Converted to new data structures.

[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  5.9 (Berkeley) %G%";
#endif  /* not lint */

#include <curses.h>
#include <termios.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.
*/
int
waddbytes(win, bytes, count)
       register WINDOW *win;
       register char *bytes;
       register int count;
{
       static char blanks[] = "        ";
       register int c, newx, x, y;
       LINE *lp;

       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->lines[y]->firstch, win->lines[y]->lastch);
#endif
                       if (win->flags & __WSTANDOUT)
                               c |= __STANDOUT;
#ifdef DEBUG
       __TRACE("ADDBYTES(%0.2o, %d, %d)\n", win, y, x);
#endif
                       lp = win->lines[y];
                       
                       if (lp->line[x] != c) {
                               newx = x + win->ch_off;
                               if (!(lp->flags & __ISDIRTY)) {
                                       lp->flags |= __ISDIRTY;
                                       lp->firstch = lp->lastch = newx;
                               }
                               else if (newx < lp->firstch)
                                       lp->firstch = newx;
                               else if (newx > lp->lastch)
                                       lp->lastch = newx;
#ifdef DEBUG
       __TRACE("ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
           lp->firstch, lp->lastch,
           lp->firstch - win->ch_off,
           lp->lastch - win->ch_off);
#endif
                       }
                       lp->line[x] = c;
                       if (++x >= win->maxx) {
                               x = 0;
newline:                        if (++y >= win->maxy) 
                                       if (win->flags & __SCROLLOK) {
                                               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->lines[y]->firstch, win->lines[y]->lastch);
#endif
                       break;
               case '\n':
                       SYNCH_OUT;
                       wclrtoeol(win);
                       SYNCH_IN;
                       if (origtermio.c_oflag & ONLCR)
                               x = 0;
                       goto newline;
               case '\r':
                       x = 0;
                       break;
               case '\b':
                       if (--x < 0)
                               x = 0;
                       break;
               }
       }
       SYNCH_OUT;
       return (OK);
}