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getinp.c revision 1.18 
      1 /*	$NetBSD: getinp.c,v 1.18 2008/02/24 01:57:34 dholland Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 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 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)getinp.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: getinp.c,v 1.18 2008/02/24 01:57:34 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include <string.h>
     43 #include <ctype.h>
     44 
     45 #include "monop.h"
     46 
     47 #define	LINE	70
     48 
     49 static char	buf[257];
     50 
     51 static int comp(const char *);
     52 
     53 int
     54 getinp(prompt, lst)
     55 	const char *prompt, *const lst[];
     56 {
     57 	int i, n_match, match = 0;
     58 	char *sp;
     59 
     60 	for (;;) {
     61 		printf("%s", prompt);
     62 		fgets(buf, sizeof(buf), stdin);
     63 		if (feof(stdin)) {
     64 			return 0;
     65 		}
     66 		if (buf[0] == '?' && buf[1] == '\n') {
     67 			printf("Valid inputs are: ");
     68 			for (i = 0, match = 18; lst[i]; i++) {
     69 				if ((match+=(n_match=strlen(lst[i]))) > LINE) {
     70 					printf("\n\t");
     71 					match = n_match + 8;
     72 				}
     73 				if (*lst[i] == '\0') {
     74 					match += 8;
     75 					printf("<RETURN>");
     76 				}
     77 				else
     78 					printf("%s", lst[i]);
     79 				if (lst[i+1])
     80 					printf(", ");
     81 				else
     82 					putchar('\n');
     83 				match += 2;
     84 			}
     85 			continue;
     86 		}
     87 		if ((sp = strchr(buf, '\n')) != NULL)
     88 			*sp = '\0';
     89 		for (sp = buf; *sp; sp++)
     90 			*sp = tolower((unsigned char)*sp);
     91 		for (i = n_match = 0; lst[i]; i++)
     92 			if (comp(lst[i])) {
     93 				n_match++;
     94 				match = i;
     95 			}
     96 		if (n_match == 1)
     97 			return match;
     98 		else if (buf[0] != '\0')
     99 			printf("Illegal response: \"%s\".  "
    100 			    "Use '?' to get list of valid answers\n", buf);
    101 	}
    102 }
    103 
    104 static int
    105 comp(s1)
    106 	const char *s1;
    107 {
    108 	const char *sp, *tsp;
    109 	char c;
    110 
    111 	if (buf[0] != '\0')
    112 		for (sp = buf, tsp = s1; *sp; ) {
    113 			c = tolower((unsigned char)*tsp);
    114 			tsp++;
    115 			if (c != *sp++)
    116 				return 0;
    117 		}
    118 	else if (*s1 != '\0')
    119 		return 0;
    120 	return 1;
    121 }
    122