1/*	$OpenBSD: getinp.c,v 1.12 2016/01/08 18:20:33 mestre Exp $	*/
2/*	$NetBSD: getinp.c,v 1.4 1995/04/24 12:24:20 cgd Exp $	*/
3
4/*
5 * Copyright (c) 1980, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <ctype.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37
38#include "monop.ext"
39
40#define	LINE	70
41
42static char	buf[257];
43
44static int	comp(char *);
45
46int
47getinp(char *prompt, char *list[])
48{
49	int	i, n_match, match;
50	char	*sp;
51
52	for (;;) {
53		printf("%s", prompt);
54		fgets(buf, sizeof(buf), stdin);
55		if ((feof(stdin))) {
56			printf("user closed input stream, quitting...\n");
57			exit(0);
58		}
59		if (buf[0] == '?' /* && buf[1] == '\n' */ ) {
60			printf("Valid inputs are: ");
61			for (i = 0, match = 18; list[i]; i++) {
62				if ((match += (n_match = strlen(list[i]))) > LINE) {
63					printf("\n\t");
64					match = n_match + 8;
65				}
66				if (*list[i] == '\0') {
67					match += 8;
68					printf("<RETURN>");
69				}
70				else
71					printf("%s", list[i]);
72				if (list[i+1])
73					printf(", ");
74				else
75					putchar('\n');
76				match += 2;
77			}
78			continue;
79		}
80		if ((sp = strchr(buf, '\n')) != NULL)
81			*sp = '\0';
82		for (sp = buf; *sp; sp++)
83			if (isupper((unsigned char)*sp))
84				*sp = tolower((unsigned char)*sp);
85		for (i = n_match = 0; list[i]; i++)
86			if (comp(list[i])) {
87				n_match++;
88				match = i;
89			}
90		if (n_match == 1)
91			return match;
92		else if (buf[0] != '\0')
93			printf("Illegal response: \"%s\".  Use '?' to get list of valid answers\n", buf);
94	}
95	return 0;
96}
97
98static int
99comp(char *s1)
100{
101	char	*sp, *tsp, c;
102
103	if (buf[0] != '\0')
104		for (sp = buf, tsp = s1; *sp; ) {
105			c = isupper((unsigned char)*tsp) ?
106			    tolower((unsigned char)*tsp) : *tsp;
107			tsp++;
108			if (c != *sp++)
109				return 0;
110		}
111	else if (*s1 != '\0')
112		return 0;
113	return 1;
114}
115