bgets()

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

#ifndef lint
static  char *sccsid = "@(#)wwgets.c    1.5 83/07/28";
#endif

#include "defs.h"

char *ibufp = ibuf;

bread()
{
       register n;
       register char *p;
       int imask;

       while (ibufc == 0) {
               wwflush();
               imask = 1 << 0;
               while (wwforce(&imask) < 0)
                       ;
               if ((imask & 1 << 0) == 0)
                       continue;
               if (ibufc == 0) {
                       p = ibufp = ibuf;
                       n = sizeof ibuf;
               } else {
                       p = ibufp + ibufc;
                       n = (ibuf + sizeof ibuf) - p;
               }
               if ((n = read(0, p, n)) > 0) {
                       ibufc += n;
                       nreadc += n;
               } else if (n == 0)
                       nreadz++;
               else
                       nreade++;
               nread++;
       }
}

bgets(buf, n, w)
char *buf;
int n;
register struct ww *w;
{
       register char *p = buf;
       register char c;

       for (;;) {
               wwsetcursor(WCurRow(w->ww_win), WCurCol(w->ww_win));
               while ((c = bpeekc()) < 0)
                       bread();
               switch (c) {
               case '\b':
                       if (p > buf) {
                               wwputs("\b \b", w);
                               p--;
                               if (ISCTRL(*p))
                                       wwputs("\b \b", w);
                       } else
                               Ding();
                       break;
               case '\r':
               case '\n':
                       *p = 0;
                       return;
               default:
                       if (p >= buf + n - 1)
                               Ding();
                       else {
                               *p++ = c;
                               wwputs(unctrl(*p), w);
                       }
               }
       }
}