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getinp.c revision 1.16 
      1 /*	$NetBSD: getinp.c,v 1.16 2008/02/19 09:45:02 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 1.16 2008/02/19 09:45:02 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include <string.h>
     43 #include <ctype.h>
     44 #include "monop.ext"
     45 
     46 #define	LINE	70
     47 
     48 static char	buf[257];
     49 
     50 static int comp(const char *);
     51 
     52 int
     53 getinp(prompt, lst)
     54 	const char *prompt, *const lst[];
     55 {
     56 	int i, n_match, match = 0;
     57 	char *sp;
     58 	int c;
     59 
     60 	for (;;) {
     61 		printf("%s", prompt);
     62 		for (sp = buf; (c = getchar()) != '\n'; ) {
     63 			if (c == -1)
     64 				return 0;
     65 			*sp = c;
     66 			if (sp != buf || *sp != ' ')
     67 				sp++;
     68 		}
     69 		*sp = c;
     70 		if (buf[0] == '?' && buf[1] == '\n') {
     71 			printf("Valid inputs are: ");
     72 			for (i = 0, match = 18; lst[i]; i++) {
     73 				if ((match+=(n_match=strlen(lst[i]))) > LINE) {
     74 					printf("\n\t");
     75 					match = n_match + 8;
     76 				}
     77 				if (*lst[i] == '\0') {
     78 					match += 8;
     79 					printf("<RETURN>");
     80 				}
     81 				else
     82 					printf("%s", lst[i]);
     83 				if (lst[i+1])
     84 					printf(", ");
     85 				else
     86 					putchar('\n');
     87 				match += 2;
     88 			}
     89 			continue;
     90 		}
     91 		*sp = '\0';
     92 		for (sp = buf; *sp; sp++)
     93 			*sp = tolower((unsigned char)*sp);
     94 		for (i = n_match = 0; lst[i]; i++)
     95 			if (comp(lst[i])) {
     96 				n_match++;
     97 				match = i;
     98 			}
     99 		if (n_match == 1)
    100 			return match;
    101 		else if (buf[0] != '\0')
    102 			printf("Illegal response: \"%s\".  "
    103 			    "Use '?' to get list of valid answers\n", buf);
    104 	}
    105 }
    106 
    107 static int
    108 comp(s1)
    109 	const char *s1;
    110 {
    111 	const char *sp, *tsp;
    112 	char c;
    113 
    114 	if (buf[0] != '\0')
    115 		for (sp = buf, tsp = s1; *sp; ) {
    116 			c = tolower((unsigned char)*tsp);
    117 			tsp++;
    118 			if (c != *sp++)
    119 				return 0;
    120 		}
    121 	else if (*s1 != '\0')
    122 		return 0;
    123 	return 1;
    124 }
    125