| 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; |
| } |