xref: /dragonfly/games/monop/getinp.c (revision 631c21f2)
1 /*	$NetBSD: getinp.c,v 1.19 2012/06/19 05:35:32 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  *	@(#)getinp.c	8.1 (Berkeley) 5/31/93
32  */
33 
34 #include <stdio.h>
35 #include <string.h>
36 #include <ctype.h>
37 
38 #include "monop.h"
39 
40 #define	LINE	70
41 
42 static char	buf[257];
43 
44 static int comp(const char *);
45 
46 int
47 getinp(const char *prompt, const char *const lst [])
48 {
49 	int i, n_match, match = 0;
50 	char *sp;
51 
52 	for (;;) {
53 		printf("%s", prompt);
54 		fgets(buf, sizeof(buf), stdin);
55 		if (feof(stdin)) {
56 			return 0;
57 		}
58 		if (buf[0] == '?' && buf[1] == '\n') {
59 			printf("Valid inputs are: ");
60 			for (i = 0, match = 18; lst[i]; i++) {
61 				if ((match+=(n_match=strlen(lst[i]))) > LINE) {
62 					printf("\n\t");
63 					match = n_match + 8;
64 				}
65 				if (*lst[i] == '\0') {
66 					match += 8;
67 					printf("<RETURN>");
68 				}
69 				else
70 					printf("%s", lst[i]);
71 				if (lst[i+1])
72 					printf(", ");
73 				else
74 					putchar('\n');
75 				match += 2;
76 			}
77 			continue;
78 		}
79 		if ((sp = strchr(buf, '\n')) != NULL)
80 			*sp = '\0';
81 		for (sp = buf; *sp; sp++)
82 			*sp = tolower((unsigned char)*sp);
83 		for (i = n_match = 0; lst[i]; i++)
84 			if (comp(lst[i])) {
85 				n_match++;
86 				match = i;
87 			}
88 		if (n_match == 1)
89 			return match;
90 		else if (buf[0] != '\0')
91 			printf("Illegal response: \"%s\".  "
92 			    "Use '?' to get list of valid answers\n", buf);
93 	}
94 }
95 
96 static int
97 comp(const char *s1)
98 {
99 	const char *sp, *tsp;
100 	char c;
101 
102 	if (buf[0] != '\0')
103 		for (sp = buf, tsp = s1; *sp; ) {
104 			c = tolower((unsigned char)*tsp);
105 			tsp++;
106 			if (c != *sp++)
107 				return 0;
108 		}
109 	else if (*s1 != '\0')
110 		return 0;
111 	return 1;
112 }
113