monop/getinp.c

   1 /*      $NetBSD: getinp.c,v 1.18 2008/02/24 01:57:34 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 1.18 2008/02/24 01:57:34 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(prompt, lst)
  55         const char *prompt, *const lst[];
  56 {
  57         int i, n_match, match = 0;
  58         char *sp;
  59
  60         for (;;) {
  61                 printf("%s", prompt);
  62                 fgets(buf, sizeof(buf), stdin);
  63                 if (feof(stdin)) {
  64                         return 0;
  65                 }
  66                 if (buf[0] == '?' && buf[1] == '\n') {
  67                         printf("Valid inputs are: ");
  68                         for (i = 0, match = 18; lst[i]; i++) {
  69                                 if ((match+=(n_match=strlen(lst[i]))) > LINE) {
  70                                         printf("\n\t");
  71                                         match = n_match + 8;
  72                                 }
  73                                 if (*lst[i] == '\0') {
  74                                         match += 8;
  75                                         printf("<RETURN>");
  76                                 }
  77                                 else
  78                                         printf("%s", lst[i]);
  79                                 if (lst[i+1])
  80                                         printf(", ");
  81                                 else
  82                                         putchar('\n');
  83                                 match += 2;
  84                         }
  85                         continue;
  86                 }
  87                 if ((sp = strchr(buf, '\n')) != NULL)
  88                         *sp = '\0';
  89                 for (sp = buf; *sp; sp++)
  90                         *sp = tolower((unsigned char)*sp);
  91                 for (i = n_match = 0; lst[i]; i++)
  92                         if (comp(lst[i])) {
  93                                 n_match++;
  94                                 match = i;
  95                         }
  96                 if (n_match == 1)
  97                         return match;
  98                 else if (buf[0] != '\0')
  99                         printf("Illegal response: \"%s\".  "
 100                             "Use '?' to get list of valid answers\n", buf);
 101         }
 102 }
 103
 104 static int
 105 comp(s1)
 106         const char *s1;
 107 {
 108         const char *sp, *tsp;
 109         char c;
 110
 111         if (buf[0] != '\0')
 112                 for (sp = buf, tsp = s1; *sp; ) {
 113                         c = tolower((unsigned char)*tsp);
 114                         tsp++;
 115                         if (c != *sp++)
 116                                 return 0;
 117                 }
 118         else if (*s1 != '\0')
 119                 return 0;
 120         return 1;
 121 }