Home | History | Annotate | Line # | Download | only in monop
getinp.c revision 1.13 
      1 /*	$NetBSD: getinp.c,v 1.13 2004/11/05 21:30:32 dsl 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 1.13 2004/11/05 21:30:32 dsl 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, list)
     54 	const char *prompt, *const list[];
     55 {
     56 	int i, n_match, match = 0;
     57 	char *sp;
     58 	int c;
     59 
     60 	for (;;) {
     61 inter:
     62 		printf("%s", prompt);
     63 		for (sp = buf; (c=getchar()) != '\n'; ) {
     64 			*sp = c;
     65 			if (c == -1)	/* check for interrupted system call */
     66 				goto inter;
     67 			else if (sp != buf || *sp != ' ')
     68 				sp++;
     69 		}
     70 		*sp = c;
     71 		if (buf[0] == '?' && buf[1] == '\n') {
     72 			printf("Valid inputs are: ");
     73 			for (i = 0, match = 18; list[i]; i++) {
     74 				if ((match+=(n_match=strlen(list[i]))) > LINE) {
     75 					printf("\n\t");
     76 					match = n_match + 8;
     77 				}
     78 				if (*list[i] == '\0') {
     79 					match += 8;
     80 					printf("<RETURN>");
     81 				}
     82 				else
     83 					printf("%s", list[i]);
     84 				if (list[i+1])
     85 					printf(", ");
     86 				else
     87 					putchar('\n');
     88 				match += 2;
     89 			}
     90 			continue;
     91 		}
     92 		*sp = '\0';
     93 		for (sp = buf; *sp; sp++)
     94 			*sp = tolower((unsigned char)*sp);
     95 		for (i = n_match = 0; list[i]; i++)
     96 			if (comp(list[i])) {
     97 				n_match++;
     98 				match = i;
     99 			}
    100 		if (n_match == 1)
    101 			return match;
    102 		else if (buf[0] != '\0')
    103 			printf("Illegal response: \"%s\".  "
    104 			    "Use '?' to get list of valid answers\n", buf);
    105 	}
    106 }
    107 
    108 static int
    109 comp(s1)
    110 	const char *s1;
    111 {
    112 	const char *sp, *tsp;
    113 	char c;
    114 
    115 	if (buf[0] != '\0')
    116 		for (sp = buf, tsp = s1; *sp; ) {
    117 			c = tolower((unsigned char)*tsp);
    118 			tsp++;
    119 			if (c != *sp++)
    120 				return 0;
    121 		}
    122 	else if (*s1 != '\0')
    123 		return 0;
    124 	return 1;
    125 }
    126