games/monop/getinp.c

   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  *      @(#)getinp.c    8.1 (Berkeley) 5/31/93
  32  */
  33
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 #include "monop.h"
  39
  40 #define LINE    70
  41
  42 static char     buf[257];
  43
  44 static int comp(const char *);
  45
  46 int
  47 getinp(const char *prompt, const char *const lst [])
  48 {
  49         int i, n_match, match = 0;
  50         char *sp;
  51
  52         for (;;) {
  53                 printf("%s", prompt);
  54                 fgets(buf, sizeof(buf), stdin);
  55                 if (feof(stdin)) {
  56                         return 0;
  57                 }
  58                 if (buf[0] == '?' && buf[1] == '\n') {
  59                         printf("Valid inputs are: ");
  60                         for (i = 0, match = 18; lst[i]; i++) {
  61                                 if ((match+=(n_match=strlen(lst[i]))) > LINE) {
  62                                         printf("\n\t");
  63                                         match = n_match + 8;
  64                                 }
  65                                 if (*lst[i] == '\0') {
  66                                         match += 8;
  67                                         printf("<RETURN>");
  68                                 }
  69                                 else
  70                                         printf("%s", lst[i]);
  71                                 if (lst[i+1])
  72                                         printf(", ");
  73                                 else
  74                                         putchar('\n');
  75                                 match += 2;
  76                         }
  77                         continue;
  78                 }
  79                 if ((sp = strchr(buf, '\n')) != NULL)
  80                         *sp = '\0';
  81                 for (sp = buf; *sp; sp++)
  82                         *sp = tolower((unsigned char)*sp);
  83                 for (i = n_match = 0; lst[i]; i++)
  84                         if (comp(lst[i])) {
  85                                 n_match++;
  86                                 match = i;
  87                         }
  88                 if (n_match == 1)
  89                         return match;
  90                 else if (buf[0] != '\0')
  91                         printf("Illegal response: \"%s\".  "
  92                             "Use '?' to get list of valid answers\n", buf);
  93         }
  94 }
  95
  96 static int
  97 comp(const char *s1)
  98 {
  99         const char *sp, *tsp;
 100         char c;
 101
 102         if (buf[0] != '\0')
 103                 for (sp = buf, tsp = s1; *sp; ) {
 104                         c = tolower((unsigned char)*tsp);
 105                         tsp++;
 106                         if (c != *sp++)
 107                                 return 0;
 108                 }
 109         else if (*s1 != '\0')
 110                 return 0;
 111         return 1;
 112 }