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gets.c revision 1.4 
      1 /*-
      2  * Copyright (c) 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)gets.c	8.1 (Berkeley) 6/11/93
     34  *	     $Id: gets.c,v 1.4 1994/08/22 21:56:07 brezak Exp $
     35  */
     36 
     37 #include "stand.h"
     38 
     39 void
     40 gets(buf)
     41 	char *buf;
     42 {
     43 	register int c;
     44 	register char *lp;
     45 
     46 	for (lp = buf;;)
     47 		switch (c = getchar() & 0177) {
     48 		case '\n':
     49 		case '\r':
     50 			*lp = '\0';
     51 			putchar('\n');
     52 			return;
     53 		case '\b':
     54 		case '\177':
     55 			if (lp > buf) {
     56 				lp--;
     57 				putchar('\b');
     58 				putchar(' ');
     59 				putchar('\b');
     60 			}
     61 			break;
     62 		case '#':
     63 			if (lp > buf)
     64 				--lp;
     65 			break;
     66 		case 'r'&037: {
     67 			register char *p;
     68 
     69 			putchar('\n');
     70 			for (p = buf; p < lp; ++p)
     71 				putchar(*p);
     72 			break;
     73 		}
     74 		case '@':
     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 		}
     84 	/*NOTREACHED*/
     85 }
     86