sys/lib/libsa/gets.c

   1 /*      $NetBSD: gets.c,v 1.10 2007/11/24 13:20:55 isaki Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)gets.c      8.1 (Berkeley) 6/11/93
  32  */
  33
  34 #include "stand.h"
  35
  36 void
  37 gets(char *buf)
  38 {
  39         int c;
  40         char *lp;
  41
  42         for (lp = buf;;) {
  43                 switch (c = getchar() & 0177) {
  44                 case '\n':
  45                 case '\r':
  46                         *lp = '\0';
  47                         putchar('\n');
  48                         return;
  49                 case '\b':
  50                 case '\177':
  51                         if (lp > buf) {
  52                                 lp--;
  53                                 putchar('\b');
  54                                 putchar(' ');
  55                                 putchar('\b');
  56                         }
  57                         break;
  58 #if HASH_ERASE
  59                 case '#':
  60                         if (lp > buf)
  61                                 --lp;
  62                         break;
  63 #endif
  64                 case 'r' & 037: {
  65                         char *p;
  66
  67                         putchar('\n');
  68                         for (p = buf; p < lp; ++p)
  69                                 putchar(*p);
  70                         break;
  71                 }
  72 #if AT_ERASE
  73                 case '@':
  74 #endif
  75                 case 'u' & 037:
  76                 case 'w' & 037:
  77                         lp = buf;
  78                         putchar('\n');
  79                         break;
  80                 default:
  81                         *lp++ = c;
  82                         putchar(c);
  83                         break;
  84                 }
  85         }
  86         /*NOTREACHED*/
  87 }