BSD 4_4 release

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

/*
* Copyright (c) 1983, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)wwgets.c    8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include "ww.h"
#include "char.h"

wwgets(buf, n, w)
char *buf;
int n;
register struct ww *w;
{
       register char *p = buf;
       register char c;
       char uc = w->ww_unctrl;
       static void rub();

       w->ww_unctrl = 0;
       for (;;) {
               wwcurtowin(w);
               while ((c = wwgetc()) < 0)
                       wwiomux();
#ifdef OLD_TTY
               if (c == wwoldtty.ww_sgttyb.sg_erase)
#else
               if (c == wwoldtty.ww_termios.c_cc[VERASE])
#endif
               {
                       if (p > buf)
                               rub(*--p, w);
               } else
#ifdef OLD_TTY
               if (c == wwoldtty.ww_sgttyb.sg_kill)
#else
               if (c == wwoldtty.ww_termios.c_cc[VKILL])
#endif
               {
                       while (p > buf)
                               rub(*--p, w);
               } else
#ifdef OLD_TTY
               if (c == wwoldtty.ww_ltchars.t_werasc)
#else
               if (c == wwoldtty.ww_termios.c_cc[VWERASE])
#endif
               {
                       while (--p >= buf && (*p == ' ' || *p == '\t'))
                               rub(*p, w);
                       while (p >= buf && *p != ' ' && *p != '\t')
                               rub(*p--, w);
                       p++;
               } else if (c == '\r' || c == '\n') {
                       break;
               } else {
                       if (p >= buf + n - 1)
                               wwputc(ctrl('g'), w);
                       else
                               wwputs(unctrl(*p++ = c), w);
               }
       }
       *p = 0;
       w->ww_unctrl = uc;
}

static void
rub(c, w)
struct ww *w;
{
       register i;

       for (i = strlen(unctrl(c)); --i >= 0;)
               (void) wwwrite(w, "\b \b", 3);
}