games/boggle/boggle/help.c

   1 /*      $OpenBSD: help.c,v 1.7 2016/01/10 14:10:38 mestre Exp $ */
   2 /*      $NetBSD: help.c,v 1.2 1995/03/21 12:14:38 cgd Exp $     */
   3
   4 /*-
   5  * Copyright (c) 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Barry Brachman.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <curses.h>
  37
  38 #include "bog.h"
  39 #include "extern.h"
  40
  41 int
  42 help(void)
  43 {
  44         int eof, i;
  45         FILE *fp;
  46         WINDOW *win;
  47         char buf[BUFSIZ];
  48
  49         if ((fp = fopen(HELPFILE, "r")) == NULL)
  50                 return(-1);
  51         win = newwin(0, 0, 0, 0);
  52         clearok(win, TRUE);
  53
  54         eof = 0;
  55         if (ungetc(getc(fp), fp) == EOF) {
  56                 wprintw(win, "There doesn't seem to be any help.");
  57                 eof = 1;                        /* Nothing there... */
  58         }
  59
  60         while (!eof) {
  61                 for (i = 0; i < nlines - 3; i++) {
  62                         if (fgets(buf, sizeof(buf), fp) == NULL) {
  63                                 eof = 1;
  64                                 break;
  65                         }
  66                         if (buf[0] == '.' && buf[1] == '\n')
  67                                 break;
  68                         wprintw(win, "%s", buf);
  69                 }
  70                 if (eof || ungetc(getc(fp), fp) == EOF) {
  71                         eof = 1;
  72                         break;
  73                 }
  74                 wmove(win, nlines - 1, 0);
  75                 wprintw(win,
  76                     "Type <space> to continue, anything else to quit...");
  77                 wrefresh(win);
  78                 if ((inputch() & 0177) != ' ')
  79                         break;
  80                 wclear(win);
  81         }
  82
  83         fclose(fp);
  84         if (eof) {
  85                 wmove(win, nlines - 1, 0);
  86                 wprintw(win, "Hit any key to continue...");
  87                 wrefresh(win);
  88                 inputch();
  89         }
  90         delwin(win);
  91         clearok(stdscr, TRUE);
  92         touchwin(stdscr);
  93         refresh();
  94         return(0);
  95 }