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1 | /* $OpenBSD: shapes.c,v 1.8 2004/07/10 07:26:24 deraadt Exp $ */ |
1 | /* $OpenBSD: shapes.c,v 1.8 2004/07/10 07:26:24 deraadt Exp $ */ |
2 | /* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */ |
2 | /* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */ |
3 | 3 | ||
4 | /*- |
4 | /*- |
5 | * Copyright (c) 1992, 1993 |
5 | * Copyright (c) 1992, 1993 |
6 | * The Regents of the University of California. All rights reserved. |
6 | * The Regents of the University of California. All rights reserved. |
7 | * |
7 | * |
8 | * This code is derived from software contributed to Berkeley by |
8 | * This code is derived from software contributed to Berkeley by |
9 | * Chris Torek and Darren F. Provine. |
9 | * Chris Torek and Darren F. Provine. |
10 | * |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
18 | * documentation and/or other materials provided with the distribution. |
19 | * 3. Neither the name of the University nor the names of its contributors |
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 |
20 | * may be used to endorse or promote products derived from this software |
21 | * without specific prior written permission. |
21 | * without specific prior written permission. |
22 | * |
22 | * |
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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 |
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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 |
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 |
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 |
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
33 | * SUCH DAMAGE. |
33 | * SUCH DAMAGE. |
34 | * |
34 | * |
35 | * @(#)shapes.c 8.1 (Berkeley) 5/31/93 |
35 | * @(#)shapes.c 8.1 (Berkeley) 5/31/93 |
36 | */ |
36 | */ |
37 | 37 | ||
38 | /** @addtogroup tetris |
38 | /** @addtogroup tetris |
39 | * @{ |
39 | * @{ |
40 | */ |
40 | */ |
41 | /** @file |
41 | /** @file |
42 | */ |
42 | */ |
43 | 43 | ||
44 | /* |
44 | /* |
45 | * Tetris shapes and related routines. |
45 | * Tetris shapes and related routines. |
46 | * |
46 | * |
47 | * Note that the first 7 are `well known'. |
47 | * Note that the first 7 are `well known'. |
48 | */ |
48 | */ |
49 | 49 | ||
50 | #include <unistd.h> |
50 | #include <unistd.h> |
51 | #include "tetris.h" |
51 | #include "tetris.h" |
52 | 52 | ||
53 | #define TL -B_COLS-1 /* top left */ |
53 | #define TL -B_COLS-1 /* top left */ |
54 | #define TC -B_COLS /* top center */ |
54 | #define TC -B_COLS /* top center */ |
55 | #define TR -B_COLS+1 /* top right */ |
55 | #define TR -B_COLS+1 /* top right */ |
56 | #define ML -1 /* middle left */ |
56 | #define ML -1 /* middle left */ |
57 | #define MR 1 /* middle right */ |
57 | #define MR 1 /* middle right */ |
58 | #define BL B_COLS-1 /* bottom left */ |
58 | #define BL B_COLS-1 /* bottom left */ |
59 | #define BC B_COLS /* bottom center */ |
59 | #define BC B_COLS /* bottom center */ |
60 | #define BR B_COLS+1 /* bottom right */ |
60 | #define BR B_COLS+1 /* bottom right */ |
61 | 61 | ||
62 | const struct shape shapes[] = { |
62 | const struct shape shapes[] = { |
63 | /* 0*/ { 7, 7, { TL, TC, MR } }, |
63 | /* 0*/ { 7, 7, { TL, TC, MR } }, |
64 | /* 1*/ { 8, 8, { TC, TR, ML } }, |
64 | /* 1*/ { 8, 8, { TC, TR, ML } }, |
65 | /* 2*/ { 9, 11, { ML, MR, BC } }, |
65 | /* 2*/ { 9, 11, { ML, MR, BC } }, |
66 | /* 3*/ { 3, 3, { TL, TC, ML } }, |
66 | /* 3*/ { 3, 3, { TL, TC, ML } }, |
67 | /* 4*/ { 12, 14, { ML, BL, MR } }, |
67 | /* 4*/ { 12, 14, { ML, BL, MR } }, |
68 | /* 5*/ { 15, 17, { ML, BR, MR } }, |
68 | /* 5*/ { 15, 17, { ML, BR, MR } }, |
69 | /* 6*/ { 18, 18, { ML, MR, 2 } }, /* sticks out */ |
69 | /* 6*/ { 18, 18, { ML, MR, 2 } }, /* sticks out */ |
70 | /* 7*/ { 0, 0, { TC, ML, BL } }, |
70 | /* 7*/ { 0, 0, { TC, ML, BL } }, |
71 | /* 8*/ { 1, 1, { TC, MR, BR } }, |
71 | /* 8*/ { 1, 1, { TC, MR, BR } }, |
72 | /* 9*/ { 10, 2, { TC, MR, BC } }, |
72 | /* 9*/ { 10, 2, { TC, MR, BC } }, |
73 | /*10*/ { 11, 9, { TC, ML, MR } }, |
73 | /*10*/ { 11, 9, { TC, ML, MR } }, |
74 | /*11*/ { 2, 10, { TC, ML, BC } }, |
74 | /*11*/ { 2, 10, { TC, ML, BC } }, |
75 | /*12*/ { 13, 4, { TC, BC, BR } }, |
75 | /*12*/ { 13, 4, { TC, BC, BR } }, |
76 | /*13*/ { 14, 12, { TR, ML, MR } }, |
76 | /*13*/ { 14, 12, { TR, ML, MR } }, |
77 | /*14*/ { 4, 13, { TL, TC, BC } }, |
77 | /*14*/ { 4, 13, { TL, TC, BC } }, |
78 | /*15*/ { 16, 5, { TR, TC, BC } }, |
78 | /*15*/ { 16, 5, { TR, TC, BC } }, |
79 | /*16*/ { 17, 15, { TL, MR, ML } }, |
79 | /*16*/ { 17, 15, { TL, MR, ML } }, |
80 | /*17*/ { 5, 16, { TC, BC, BL } }, |
80 | /*17*/ { 5, 16, { TC, BC, BL } }, |
81 | /*18*/ { 6, 6, { TC, BC, 2*B_COLS } }/* sticks out */ |
81 | /*18*/ { 6, 6, { TC, BC, 2*B_COLS } }/* sticks out */ |
82 | }; |
82 | }; |
83 | 83 | ||
84 | /* |
84 | /* |
85 | * Return true iff the given shape fits in the given position, |
85 | * Return true iff the given shape fits in the given position, |
86 | * taking the current board into account. |
86 | * taking the current board into account. |
87 | */ |
87 | */ |
88 | int |
88 | int |
89 | fits_in(const struct shape *shape, int pos) |
89 | fits_in(const struct shape *shape, int pos) |
90 | { |
90 | { |
91 | int *o = shape->off; |
91 | int *o = shape->off; |
92 | 92 | ||
93 | if (board[pos] || board[pos + *o++] || board[pos + *o++] || |
93 | if (board[pos] || board[pos + *o++] || board[pos + *o++] || |
94 | board[pos + *o]) |
94 | board[pos + *o]) |
95 | return 0; |
95 | return 0; |
96 | return 1; |
96 | return 1; |
97 | } |
97 | } |
98 | 98 | ||
99 | /* |
99 | /* |
100 | * Write the given shape into the current board, turning it on |
100 | * Write the given shape into the current board, turning it on |
101 | * if `onoff' is 1, and off if `onoff' is 0. |
101 | * if `onoff' is 1, and off if `onoff' is 0. |
102 | */ |
102 | */ |
103 | void |
103 | void |
104 | place(const struct shape *shape, int pos, int onoff) |
104 | place(const struct shape *shape, int pos, int onoff) |
105 | { |
105 | { |
106 | int *o = shape->off; |
106 | int *o = shape->off; |
107 | 107 | ||
108 | board[pos] = onoff; |
108 | board[pos] = onoff; |
109 | board[pos + *o++] = onoff; |
109 | board[pos + *o++] = onoff; |
110 | board[pos + *o++] = onoff; |
110 | board[pos + *o++] = onoff; |
111 | board[pos + *o] = onoff; |
111 | board[pos + *o] = onoff; |
112 | } |
112 | } |
113 | 113 | ||
114 | /** @} |
114 | /** @} |
115 | */ |
115 | */ |
116 | 116 | ||
117 | 117 |