games/battlestar/getcom.c

   1 /*-
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)getcom.c 8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/battlestar/getcom.c,v 1.6.2.1 2001/03/05 11:45:36 kris Exp $
  31  * $DragonFly: src/games/battlestar/getcom.c,v 1.3 2006/08/08 16:47:20 pavalos Exp $
  32  */
  33
  34 #include <ctype.h>
  35 #include "externs.h"
  36
  37 char *
  38 getcom(char *buf, int size, const char *prompt, const char *error)
  39 {
  40         for (;;) {
  41                 fputs(prompt, stdout);
  42                 if (fgets(buf, size, stdin) == 0) {
  43                         clearerr(stdin);
  44                         continue;
  45                 }
  46                 while (isspace(*buf))
  47                         buf++;
  48                 if (*buf)
  49                         break;
  50                 if (error)
  51                         puts(error);
  52         }
  53         return (buf);
  54 }
  55
  56
  57 /*
  58  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
  59  * and leaves it unchanged if flag = 0
  60  */
  61 char *
  62 getword(char *buf1, char *buf2, int flag)
  63 {
  64         while (isspace(*buf1))
  65                 buf1++;
  66         if (*buf1 != ',') {
  67                 if (!*buf1) {
  68                         *buf2 = 0;
  69                         return (0);
  70                 }
  71                 while (*buf1 && !isspace(*buf1) && *buf1 != ',')
  72                         if (flag < 0) {
  73                                 if (isupper(*buf1))
  74                                         *buf2++ = tolower(*buf1++);
  75                                 else
  76                                         *buf2++ = *buf1++;
  77                         } else if (flag > 0) {
  78                                 if (islower(*buf1))
  79                                         *buf2++ = toupper(*buf1++);
  80                                 else
  81                                         *buf2++ = *buf1++;
  82                         } else {
  83                                 *buf2++ = *buf1++;
  84                         }
  85         } else
  86                 *buf2++ = *buf1++;
  87         *buf2 = 0;
  88         while (isspace(*buf1))
  89                 buf1++;
  90         return (*buf1 ? buf1 : NULL);
  91 }