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      1 /*	$NetBSD: box.h,v 1.4 2021/12/05 09:53:15 rillig Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Single box utilities; A box is an entity with four edges, four corners, and
     34  * a center that maps directly to a board
     35  */
     36 
     37 #ifndef _H_BOX
     38 #define _H_BOX
     39 
     40 #include <stdlib.h>
     41 
     42 class BOARD;
     43 
     44 class POINT {
     45   public:
     46     int x;
     47     int y;
     48 };
     49 
     50 class BOX {
     51   public:
     52     enum EDGE {
     53 	first  = 0,
     54 	top    = 0,
     55 	bottom = 1,
     56 	left   = 2,
     57 	right  = 3,
     58 	last   = 4,
     59     };
     60 
     61     BOX(size_t py, size_t px, BOARD& b);
     62 
     63     void reset(void);		// Clear a box
     64     void paint(void);		// Paint a box
     65 
     66     // Member access
     67     int& name(void);
     68     int& edge(int e);
     69 
     70     // Edge manipulations
     71     void set(int e);
     72     void clr(int e);
     73     int isset(int e) const;
     74 
     75     int count(void) const;	// Count the number of edges in use
     76 
     77     // Useful constants
     78     // Relative coordinates of the edges from the center of the box.
     79     static const POINT edges[BOX::last];
     80     // Relative coordinates of the corners from the center of the box.
     81     static const POINT corners[BOX::last];
     82     // Character symbols of the four edges
     83     static const int syms[BOX::last];
     84 
     85   private:
     86     void addcorner(size_t y, size_t x);	// add a corner character
     87 
     88     size_t _centerx;	// Coordinates of the center in board units
     89     size_t _centery;
     90     BOARD& _b;		// The board we refer to
     91 };
     92 
     93 #endif
     94