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      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 
     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 1.19 2012/06/19 05:35:32 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include <string.h>
     43 #include <ctype.h>
     44 
     45 #include "monop.h"
     46 
     47 #define	LINE	70
     48 
     49 static char	buf[257];
     50 
     51 static int comp(const char *);
     52 
     53 int
     54 getinp(const char *prompt, const char *const lst [])
     55 {
     56 	int i, n_match, match = 0;
     57 	char *sp;
     58 
     59 	for (;;) {
     60 		printf("%s", prompt);
     61 		fgets(buf, sizeof(buf), stdin);
     62 		if (feof(stdin)) {
     63 			return 0;
     64 		}
     65 		if (buf[0] == '?' && buf[1] == '\n') {
     66 			printf("Valid inputs are: ");
     67 			for (i = 0, match = 18; lst[i]; i++) {
     68 				if ((match+=(n_match=strlen(lst[i]))) > LINE) {
     69 					printf("\n\t");
     70 					match = n_match + 8;
     71 				}
     72 				if (*lst[i] == '\0') {
     73 					match += 8;
     74 					printf("<RETURN>");
     75 				}
     76 				else
     77 					printf("%s", lst[i]);
     78 				if (lst[i+1])
     79 					printf(", ");
     80 				else
     81 					putchar('\n');
     82 				match += 2;
     83 			}
     84 			continue;
     85 		}
     86 		if ((sp = strchr(buf, '\n')) != NULL)
     87 			*sp = '\0';
     88 		for (sp = buf; *sp; sp++)
     89 			*sp = tolower((unsigned char)*sp);
     90 		for (i = n_match = 0; lst[i]; i++)
     91 			if (comp(lst[i])) {
     92 				n_match++;
     93 				match = i;
     94 			}
     95 		if (n_match == 1)
     96 			return match;
     97 		else if (buf[0] != '\0')
     98 			printf("Illegal response: \"%s\".  "
     99 			    "Use '?' to get list of valid answers\n", buf);
    100 	}
    101 }
    102 
    103 static int
    104 comp(const char *s1)
    105 {
    106 	const char *sp, *tsp;
    107 	char c;
    108 
    109 	if (buf[0] != '\0')
    110 		for (sp = buf, tsp = s1; *sp; ) {
    111 			c = tolower((unsigned char)*tsp);
    112 			tsp++;
    113 			if (c != *sp++)
    114 				return 0;
    115 		}
    116 	else if (*s1 != '\0')
    117 		return 0;
    118 	return 1;
    119 }
    120