/*      $NetBSD: gets.c,v 1.15 2019/03/31 20:08:45 christos Exp $       */

/*-
* Copyright (c) 1993
*      The Regents of the University of California.  All rights reserved.
*
* 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. 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.
*
*      @(#)gets.c      8.1 (Berkeley) 6/11/93
*/

#include "stand.h"

#if 0 /* harmful */
void
gets(char *buf)
{
       kgets(buf, (size_t)-1);
}
#endif

void
kgets(char *buf, size_t size)
{
       int c;
       char *lp;

       for (lp = buf;;) {
               if ((size_t)(lp - buf) == size) {
                       lp--;
                       *lp = '\0';
                       return;
               }
               switch (c = getchar() & 0177) {
               case '\n':
               case '\r':
                       *lp = '\0';
                       putchar('\n');
                       return;
               case '\b':
               case '\177':
                       if (lp > buf) {
                               lp--;
                               putchar('\b');
                               putchar(' ');
                               putchar('\b');
                       }
                       break;
#if HASH_ERASE
               case '#':
                       if (lp > buf)
                               --lp;
                       break;
#endif
               case 'r' & 037: {
                       char *p;

                       putchar('\n');
                       for (p = buf; p < lp; ++p)
                               putchar(*p);
                       break;
               }
#if AT_ERASE
               case '@':
#endif
               case 'u' & 037:
               case 'w' & 037:
                       lp = buf;
                       putchar('\n');
                       break;
               default:
                       *lp++ = c;
                       putchar(c);
                       break;
               }
       }
       /*NOTREACHED*/
}