monop/getinp.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 /*static char sccsid[] = "from: @(#)getinp.c    5.4 (Berkeley) 2/28/91";*/
  36 static char rcsid[] = "$Id: getinp.c,v 1.2 1993/08/01 18:53:42 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 # include       <stdio.h>
  40 # include       <ctype.h>
  41
  42 # define        reg     register
  43
  44 # define        LINE    70
  45
  46 static char     buf[257];
  47
  48 getinp(prompt, list)
  49 char    *prompt, *list[]; {
  50
  51         reg int i, n_match, match;
  52         char    *sp;
  53         int     plen;
  54         static int comp();
  55
  56         for (;;) {
  57 inter:
  58                 printf(prompt);
  59                 for (sp = buf; (*sp=getchar()) != '\n'; )
  60                         if (*sp == -1)  /* check for interupted system call */
  61                                 goto inter;
  62                         else if (sp != buf || *sp != ' ')
  63                                 sp++;
  64                 if (buf[0] == '?' && buf[1] == '\n') {
  65                         printf("Valid inputs are: ");
  66                         for (i = 0, match = 18; list[i]; i++) {
  67                                 if ((match+=(n_match=strlen(list[i]))) > LINE) {
  68                                         printf("\n\t");
  69                                         match = n_match + 8;
  70                                 }
  71                                 if (*list[i] == '\0') {
  72                                         match += 8;
  73                                         printf("<RETURN>");
  74                                 }
  75                                 else
  76                                         printf(list[i]);
  77                                 if (list[i+1])
  78                                         printf(", ");
  79                                 else
  80                                         putchar('\n');
  81                                 match += 2;
  82                         }
  83                         continue;
  84                 }
  85                 *sp = '\0';
  86                 for (sp = buf; *sp; sp++)
  87                         if (isupper(*sp))
  88                                 *sp = tolower(*sp);
  89                 for (i = n_match = 0; list[i]; i++)
  90                         if (comp(list[i])) {
  91                                 n_match++;
  92                                 match = i;
  93                         }
  94                 if (n_match == 1)
  95                         return match;
  96                 else if (buf[0] != '\0')
  97                         printf("Illegal response: \"%s\".  Use '?' to get list of valid answers\n", buf);
  98         }
  99 }
 100
 101 static
 102 comp(s1)
 103 char    *s1; {
 104
 105         reg char        *sp, *tsp, c;
 106
 107         if (buf[0] != '\0')
 108                 for (sp = buf, tsp = s1; *sp; ) {
 109                         c = isupper(*tsp) ? tolower(*tsp) : *tsp;
 110                         tsp++;
 111                         if (c != *sp++)
 112                                 return 0;
 113                 }
 114         else if (*s1 != '\0')
 115                 return 0;
 116         return 1;
 117 }