0,0 → 1,106 |
/* $OpenBSD: shapes.c,v 1.8 2004/07/10 07:26:24 deraadt Exp $ */ |
/* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */ |
|
/*- |
* Copyright (c) 1992, 1993 |
* The Regents of the University of California. All rights reserved. |
* |
* This code is derived from software contributed to Berkeley by |
* Chris Torek and Darren F. Provine. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* 3. Neither the name of the University nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* |
* @(#)shapes.c 8.1 (Berkeley) 5/31/93 |
*/ |
|
/* |
* Tetris shapes and related routines. |
* |
* Note that the first 7 are `well known'. |
*/ |
|
#include <unistd.h> |
#include "tetris.h" |
|
#define TL -B_COLS-1 /* top left */ |
#define TC -B_COLS /* top center */ |
#define TR -B_COLS+1 /* top right */ |
#define ML -1 /* middle left */ |
#define MR 1 /* middle right */ |
#define BL B_COLS-1 /* bottom left */ |
#define BC B_COLS /* bottom center */ |
#define BR B_COLS+1 /* bottom right */ |
|
const struct shape shapes[] = { |
/* 0*/ { 7, 7, { TL, TC, MR } }, |
/* 1*/ { 8, 8, { TC, TR, ML } }, |
/* 2*/ { 9, 11, { ML, MR, BC } }, |
/* 3*/ { 3, 3, { TL, TC, ML } }, |
/* 4*/ { 12, 14, { ML, BL, MR } }, |
/* 5*/ { 15, 17, { ML, BR, MR } }, |
/* 6*/ { 18, 18, { ML, MR, 2 } }, /* sticks out */ |
/* 7*/ { 0, 0, { TC, ML, BL } }, |
/* 8*/ { 1, 1, { TC, MR, BR } }, |
/* 9*/ { 10, 2, { TC, MR, BC } }, |
/*10*/ { 11, 9, { TC, ML, MR } }, |
/*11*/ { 2, 10, { TC, ML, BC } }, |
/*12*/ { 13, 4, { TC, BC, BR } }, |
/*13*/ { 14, 12, { TR, ML, MR } }, |
/*14*/ { 4, 13, { TL, TC, BC } }, |
/*15*/ { 16, 5, { TR, TC, BC } }, |
/*16*/ { 17, 15, { TL, MR, ML } }, |
/*17*/ { 5, 16, { TC, BC, BL } }, |
/*18*/ { 6, 6, { TC, BC, 2*B_COLS } }/* sticks out */ |
}; |
|
/* |
* Return true iff the given shape fits in the given position, |
* taking the current board into account. |
*/ |
int |
fits_in(const struct shape *shape, int pos) |
{ |
int *o = shape->off; |
|
if (board[pos] || board[pos + *o++] || board[pos + *o++] || |
board[pos + *o]) |
return 0; |
return 1; |
} |
|
/* |
* Write the given shape into the current board, turning it on |
* if `onoff' is 1, and off if `onoff' is 0. |
*/ |
void |
place(const struct shape *shape, int pos, int onoff) |
{ |
int *o = shape->off; |
|
board[pos] = onoff; |
board[pos + *o++] = onoff; |
board[pos + *o++] = onoff; |
board[pos + *o] = onoff; |
} |