multiple window

[unix-history] / usr / src / usr.bin / window / main.c

#ifndef lint
static  char *sccsid = "@(#)main.c      1.3 83/07/18";
#endif

#include "defs.h"

main()
{
       register n;
       register char *p;
       int wwchild();
       int imask;

       gettimeofday(&starttime, &timezone);
       if (wwinit() < 0) {
               fflush(stdout);
               fprintf("Can't do windows on this terminal.\n");
               exit(1);
       }
       if ((cmdwin = wwopen(1, 0, 1, WCols, 0, 0)) == 0) {
               fflush(stdout);
               fprintf(stderr, "Can't open command window.\r\n");
               goto bad;
       }
       wwsetcurrent(cmdwin);
       for (n = 0; n < WCols; n++)
               Waputc(0, WINVERSE|WBUF, cmdwin->ww_win);
       wwflush();
       (void) signal(SIGCHLD, wwchild);
       while (!quit) {
               if (curwin == cmdwin) {
                       docmd();
                       continue;
               }
               while (ibufc == 0) {
                       wwsetcursor(WCurRow(curwin->ww_win),
                               WCurCol(curwin->ww_win));
                       wwflush();
                       imask = 1<<0;
                       wwforce(&imask);
                       if ((imask & 1<<0) == 0)
                               continue;
                       if (ibufc == 0)
                               ibufp = ibuf;
                       p = ibufp + ibufc;
                       n = read(0, p, ibuf + sizeof ibuf - p);
                       if (n > 0)
                               ibufc = n;
               }
               for (p = ibufp, n = ibufc; n-- > 0 && *p != ESCAPE; p++)
                       ;
               if ((n = p - ibufp) > 0) {
                       write(curwin->ww_pty, ibufp, n);
                       ibufp = p;
                       ibufc -= n;
               }
               if (*p == ESCAPE) {
                       ibufp++;
                       ibufc--;
                       wwsetcurrent(cmdwin);
               }
       }
bad:
       wwend();
       return 0;
}