1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/ljtypes.h	Fri Mar 13 00:39:12 2009 -0700
     1.3 @@ -0,0 +1,61 @@
     1.4 +/* Basic data types for LOCKJAW, an implementation of the Soviet Mind Game
     1.5 +
     1.6 +Copyright (C) 2006 Damian Yerrick <tepples+lj@spamcop.net>
     1.7 +
     1.8 +This work is free software; you can redistribute it and/or modify
     1.9 +it under the terms of the GNU General Public License as published by
    1.10 +the Free Software Foundation; either version 2 of the License, or
    1.11 +(at your option) any later version.
    1.12 +
    1.13 +This program is distributed in the hope that it will be useful,
    1.14 +but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 +GNU General Public License for more details.
    1.17 +
    1.18 +You should have received a copy of the GNU General Public License
    1.19 +along with this program; if not, write to the Free Software
    1.20 +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    1.21 +
    1.22 +Original game concept and design by Alexey Pajitnov.
    1.23 +The Software is not sponsored or endorsed by Alexey Pajitnov, Elorg,
    1.24 +or The Tetris Company LLC.
    1.25 +
    1.26 +*/
    1.27 +
    1.28 +#ifndef LJTYPES_H
    1.29 +#define LJTYPES_H
    1.30 +
    1.31 +/**
    1.32 + * A 16.16 signed number. Used commonly for Y piece positions.
    1.33 + */
    1.34 +typedef signed int LJFixed;
    1.35 +
    1.36 +static inline signed int ljfixfloor(LJFixed f) __attribute__((const)); 
    1.37 +
    1.38 +static inline signed int ljfixfloor(LJFixed f) {
    1.39 +  return f >> 16;
    1.40 +}
    1.41 +
    1.42 +static inline LJFixed ljitofix(signed int f) __attribute__((const)); 
    1.43 +
    1.44 +static inline LJFixed ljitofix(signed int f) {
    1.45 +  return f << 16;
    1.46 +}
    1.47 +
    1.48 +/*
    1.49 + * In most cases, macros are deprecated in favor of static inline functions
    1.50 + * because the latter allow the compiler to perform more type checks.
    1.51 + * However, the C language forbids calling a function in an inline
    1.52 + * constructor, even if it is a static inline function with no side effects.
    1.53 + * For example, GCC gives the misleading error message
    1.54 + * "error: initializer element is not constant".
    1.55 + * Therefore, I have to provide a second implementation of ljitofix()
    1.56 + * as a macro for use in global variable initializers.
    1.57 + */
    1.58 +#define LJITOFIX(f) ((LJFixed)((f) << 16))
    1.59 +
    1.60 +
    1.61 +typedef unsigned int LJBits;
    1.62 +
    1.63 +#endif
    1.64 +