Mercurial > hg > index.fcgi > lj > lj046
comparison src/ljtypes.h @ 3:17286938e22a
change DS alt. rotate key to rotate twice
| author | paulo@localhost |
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| date | Wed, 08 Apr 2009 21:50:13 -0700 |
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| -1:000000000000 | 0:e32604d0946a |
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| 1 /* Basic data types for LOCKJAW, an implementation of the Soviet Mind Game | |
| 2 | |
| 3 Copyright (C) 2006 Damian Yerrick <tepples+lj@spamcop.net> | |
| 4 | |
| 5 This work is free software; you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 2 of the License, or | |
| 8 (at your option) any later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Original game concept and design by Alexey Pajitnov. | |
| 20 The Software is not sponsored or endorsed by Alexey Pajitnov, Elorg, | |
| 21 or The Tetris Company LLC. | |
| 22 | |
| 23 */ | |
| 24 | |
| 25 #ifndef LJTYPES_H | |
| 26 #define LJTYPES_H | |
| 27 | |
| 28 /** | |
| 29 * A 16.16 signed number. Used commonly for Y piece positions. | |
| 30 */ | |
| 31 typedef signed int LJFixed; | |
| 32 | |
| 33 static inline signed int ljfixfloor(LJFixed f) __attribute__((const)); | |
| 34 | |
| 35 static inline signed int ljfixfloor(LJFixed f) { | |
| 36 return f >> 16; | |
| 37 } | |
| 38 | |
| 39 static inline LJFixed ljitofix(signed int f) __attribute__((const)); | |
| 40 | |
| 41 static inline LJFixed ljitofix(signed int f) { | |
| 42 return f << 16; | |
| 43 } | |
| 44 | |
| 45 /* | |
| 46 * In most cases, macros are deprecated in favor of static inline functions | |
| 47 * because the latter allow the compiler to perform more type checks. | |
| 48 * However, the C language forbids calling a function in an inline | |
| 49 * constructor, even if it is a static inline function with no side effects. | |
| 50 * For example, GCC gives the misleading error message | |
| 51 * "error: initializer element is not constant". | |
| 52 * Therefore, I have to provide a second implementation of ljitofix() | |
| 53 * as a macro for use in global variable initializers. | |
| 54 */ | |
| 55 #define LJITOFIX(f) ((LJFixed)((f) << 16)) | |
| 56 | |
| 57 | |
| 58 typedef unsigned int LJBits; | |
| 59 | |
| 60 #endif | |
| 61 |