monop/getinp.c

   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 }