1 /*
2 * Copyright (c) 1980 Regents of the University of California.
3 * 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
34 #ifndef lint
35 static char sccsid[] = "@(#)getinp.c 5.4 (Berkeley) 2/28/91";
36 #endif /* not lint */
37
38 # include <stdio.h>
39 # include <ctype.h>
40
41 # define reg register
42
43 # define LINE 70
44
45 static char buf[257];
46
getinp(prompt,list)47 getinp(prompt, list)
48 char *prompt, *list[]; {
49
50 reg int i, n_match, match;
51 char *sp;
52 int plen;
53 static int comp();
54
55 for (;;) {
56 inter:
57 printf(prompt);
58 for (sp = buf; (*sp=getchar()) != '\n'; )
59 if (*sp == -1) /* check for interupted system call */
60 goto inter;
61 else if (sp != buf || *sp != ' ')
62 sp++;
63 if (buf[0] == '?' && buf[1] == '\n') {
64 printf("Valid inputs are: ");
65 for (i = 0, match = 18; list[i]; i++) {
66 if ((match+=(n_match=strlen(list[i]))) > LINE) {
67 printf("\n\t");
68 match = n_match + 8;
69 }
70 if (*list[i] == '\0') {
71 match += 8;
72 printf("<RETURN>");
73 }
74 else
75 printf(list[i]);
76 if (list[i+1])
77 printf(", ");
78 else
79 putchar('\n');
80 match += 2;
81 }
82 continue;
83 }
84 *sp = '\0';
85 for (sp = buf; *sp; sp++)
86 if (isupper(*sp))
87 *sp = tolower(*sp);
88 for (i = n_match = 0; list[i]; i++)
89 if (comp(list[i])) {
90 n_match++;
91 match = i;
92 }
93 if (n_match == 1)
94 return match;
95 else if (buf[0] != '\0')
96 printf("Illegal response: \"%s\". Use '?' to get list of valid answers\n", buf);
97 }
98 }
99
100 static
comp(s1)101 comp(s1)
102 char *s1; {
103
104 reg char *sp, *tsp, c;
105
106 if (buf[0] != '\0')
107 for (sp = buf, tsp = s1; *sp; ) {
108 c = isupper(*tsp) ? tolower(*tsp) : *tsp;
109 tsp++;
110 if (c != *sp++)
111 return 0;
112 }
113 else if (*s1 != '\0')
114 return 0;
115 return 1;
116 }
117