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getinp.c revision 1.9 
      1 /*	$NetBSD: getinp.c,v 1.9 2000/07/10 10:19:26 itojun 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)getinp.c	8.1 (Berkeley) 5/31/93";
     40 #else
     41 __RCSID("$NetBSD: getinp.c,v 1.9 2000/07/10 10:19:26 itojun Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 #include <string.h>
     47 #include <ctype.h>
     48 #include "monop.ext"
     49 
     50 #define	LINE	70
     51 
     52 static char	buf[257];
     53 
     54 static int comp __P((const char *));
     55 
     56 int
     57 getinp(prompt, list)
     58 	const char *prompt, *const list[];
     59 {
     60 	int i, n_match, match = 0;
     61 	char *sp;
     62 	int c;
     63 
     64 	for (;;) {
     65 inter:
     66 		printf("%s", prompt);
     67 		for (sp = buf; (c=getchar()) != '\n'; ) {
     68 			*sp = c;
     69 			if (c == -1)	/* check for interupted system call */
     70 				goto inter;
     71 			else if (sp != buf || *sp != ' ')
     72 				sp++;
     73 		}
     74 		*sp = c;
     75 		if (buf[0] == '?' && buf[1] == '\n') {
     76 			printf("Valid inputs are: ");
     77 			for (i = 0, match = 18; list[i]; i++) {
     78 				if ((match+=(n_match=strlen(list[i]))) > LINE) {
     79 					printf("\n\t");
     80 					match = n_match + 8;
     81 				}
     82 				if (*list[i] == '\0') {
     83 					match += 8;
     84 					printf("<RETURN>");
     85 				}
     86 				else
     87 					printf("%s", list[i]);
     88 				if (list[i+1])
     89 					printf(", ");
     90 				else
     91 					putchar('\n');
     92 				match += 2;
     93 			}
     94 			continue;
     95 		}
     96 		*sp = '\0';
     97 		for (sp = buf; *sp; sp++)
     98 			if (isupper(*sp))
     99 				*sp = tolower(*sp);
    100 		for (i = n_match = 0; list[i]; i++)
    101 			if (comp(list[i])) {
    102 				n_match++;
    103 				match = i;
    104 			}
    105 		if (n_match == 1)
    106 			return match;
    107 		else if (buf[0] != '\0')
    108 			printf("Illegal response: \"%s\".  "
    109 			    "Use '?' to get list of valid answers\n", buf);
    110 	}
    111 }
    112 
    113 static int
    114 comp(s1)
    115 	const char *s1;
    116 {
    117 	const char *sp, *tsp;
    118 	char c;
    119 
    120 	if (buf[0] != '\0')
    121 		for (sp = buf, tsp = s1; *sp; ) {
    122 			c = isupper(*tsp) ? tolower(*tsp) : *tsp;
    123 			tsp++;
    124 			if (c != *sp++)
    125 				return 0;
    126 		}
    127 	else if (*s1 != '\0')
    128 		return 0;
    129 	return 1;
    130 }
    131