games/battlestar/getcom.c

   1 /*      $NetBSD: getcom.c,v 1.12 2004/11/05 21:30:31 dsl Exp $  */
   2
   3 /*
   4  * Copyright (c) 1983, 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[] = "@(#)getcom.c    8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: getcom.c,v 1.12 2004/11/05 21:30:31 dsl Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #include "extern.h"
  42
  43 char *
  44 getcom(char *buf, int size, const char *prompt, const char *error)
  45 {
  46         for (;;) {
  47                 fputs(prompt, stdout);
  48                 if (fgets(buf, size, stdin) == 0) {
  49                         if (feof(stdin))
  50                                 die();
  51                         clearerr(stdin);
  52                         continue;
  53                 }
  54                 while (isspace((unsigned char)*buf))
  55                         buf++;
  56                 if (*buf)
  57                         break;
  58                 if (error)
  59                         puts(error);
  60         }
  61         /* If we didn't get to the end of line, don't read it in next time. */
  62         if (buf[strlen(buf) - 1] != '\n') {
  63                 int i;
  64                 while ((i = getchar()) != '\n' && i != EOF)
  65                         continue;
  66         }
  67         return (buf);
  68 }
  69
  70
  71 /*
  72  * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
  73  * and leaves it unchanged if flag = 0
  74  */
  75 char   *
  76 getword(char *buf1, char *buf2, int flag)
  77 {
  78         int cnt;
  79
  80         cnt = 1;
  81         while (isspace((unsigned char)*buf1))
  82                 buf1++;
  83         if (*buf1 != ',') {
  84                 if (!*buf1) {
  85                         *buf2 = 0;
  86                         return (0);
  87                 }
  88                 while (cnt < WORDLEN && *buf1 &&
  89                     !isspace((unsigned char)*buf1) && *buf1 != ',')
  90                         if (flag < 0) {
  91                                 if (isupper((unsigned char)*buf1)) {
  92                                         *buf2++ =
  93                                             tolower((unsigned char)*buf1++);
  94                                         cnt++;
  95                                 } else {
  96                                         *buf2++ = *buf1++;
  97                                         cnt++;
  98                                 }
  99                         } else if (flag > 0) {
 100                                 if (islower((unsigned char)*buf1)) {
 101                                         *buf2++ =
 102                                             toupper((unsigned char)*buf1++);
 103                                         cnt++;
 104                                 } else {
 105                                         *buf2++ = *buf1++;
 106                                         cnt++;
 107                                 }
 108                         } else {
 109                                 *buf2++ = *buf1++;
 110                                 cnt++;
 111                         }
 112                 if (cnt == WORDLEN)
 113                         while (*buf1 && !isspace((unsigned char)*buf1))
 114                                 buf1++;
 115         } else
 116                 *buf2++ = *buf1++;
 117         *buf2 = '\0';
 118         while (isspace((unsigned char)*buf1))
 119                 buf1++;
 120         return (*buf1 ? buf1 : NULL);
 121 }