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. 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  * @(#)getcom.c 8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/battlestar/getcom.c,v 1.6.2.1 2001/03/05 11:45:36 kris Exp $
  35  * $DragonFly: src/games/battlestar/getcom.c,v 1.3 2006/08/08 16:47:20 pavalos Exp $
  36  */
  37
  38 #include <ctype.h>
  39 #include "externs.h"
  40
  41 char *
  42 getcom(char *buf, int size, const char *prompt, const char *error)
  43 {
  44         for (;;) {
  45                 fputs(prompt, stdout);
  46                 if (fgets(buf, size, stdin) == 0) {
  47                         clearerr(stdin);
  48                         continue;
  49                 }
  50                 while (isspace(*buf))
  51                         buf++;
  52                 if (*buf)
  53                         break;
  54                 if (error)
  55                         puts(error);
  56         }
  57         return (buf);
  58 }
  59
  60
  61 /*
  62  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
  63  * and leaves it unchanged if flag = 0
  64  */
  65 char *
  66 getword(char *buf1, char *buf2, int flag)
  67 {
  68         while (isspace(*buf1))
  69                 buf1++;
  70         if (*buf1 != ',') {
  71                 if (!*buf1) {
  72                         *buf2 = 0;
  73                         return (0);
  74                 }
  75                 while (*buf1 && !isspace(*buf1) && *buf1 != ',')
  76                         if (flag < 0)
  77                                 if (isupper(*buf1))
  78                                         *buf2++ = tolower(*buf1++);
  79                                 else
  80                                         *buf2++ = *buf1++;
  81                         else if (flag > 0)
  82                                 if (islower(*buf1))
  83                                         *buf2++ = toupper(*buf1++);
  84                                 else
  85                                         *buf2++ = *buf1++;
  86                         else
  87                                 *buf2++ = *buf1++;
  88         } else
  89                 *buf2++ = *buf1++;
  90         *buf2 = 0;
  91         while (isspace(*buf1))
  92                 buf1++;
  93         return (*buf1 ? buf1 : 0);
  94 }