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gets.c revision 1.5 
      1 /*	$NetBSD: gets.c,v 1.5 1994/10/26 05:44:46 cgd 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)gets.c	8.1 (Berkeley) 6/11/93
     36  */
     37 
     38 #include "stand.h"
     39 
     40 void
     41 gets(buf)
     42 	char *buf;
     43 {
     44 	register int c;
     45 	register char *lp;
     46 
     47 	for (lp = buf;;)
     48 		switch (c = getchar() & 0177) {
     49 		case '\n':
     50 		case '\r':
     51 			*lp = '\0';
     52 			putchar('\n');
     53 			return;
     54 		case '\b':
     55 		case '\177':
     56 			if (lp > buf) {
     57 				lp--;
     58 				putchar('\b');
     59 				putchar(' ');
     60 				putchar('\b');
     61 			}
     62 			break;
     63 		case '#':
     64 			if (lp > buf)
     65 				--lp;
     66 			break;
     67 		case 'r'&037: {
     68 			register char *p;
     69 
     70 			putchar('\n');
     71 			for (p = buf; p < lp; ++p)
     72 				putchar(*p);
     73 			break;
     74 		}
     75 		case '@':
     76 		case 'u'&037:
     77 		case 'w'&037:
     78 			lp = buf;
     79 			putchar('\n');
     80 			break;
     81 		default:
     82 			*lp++ = c;
     83 			putchar(c);
     84 		}
     85 	/*NOTREACHED*/
     86 }
     87