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
getinp(const char * prompt,const char * const lst[])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
comp(const char * s1)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