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gets.c revision 1.1 
      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 1.1 1994/01/26 02:03:47 brezak Exp $
     35  */
     36 
     37 gets(buf)
     38 	char *buf;
     39 {
     40 	register int c;
     41 	register char *lp;
     42 
     43 	for (lp = buf;;)
     44 		switch (c = getchar() & 0177) {
     45 		case '\n':
     46 		case '\r':
     47 			*lp = '\0';
     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 		case '#':
     59 			if (lp > buf)
     60 				--lp;
     61 			break;
     62 		case 'r'&037: {
     63 			register char *p;
     64 
     65 			putchar('\n');
     66 			for (p = buf; p < lp; ++p)
     67 				putchar(*p);
     68 			break;
     69 		}
     70 		case '@':
     71 		case 'u'&037:
     72 		case 'w'&037:
     73 			lp = buf;
     74 			putchar('\n');
     75 			break;
     76 		default:
     77 			*lp++ = c;
     78 		}
     79 	/*NOTREACHED*/
     80 }
     81