gcc-num-format.h

/*
 *
 * gcc-num-format.h - Number macros.
 *
 * Copyright(C) 2018   MEJT
 *
 * This  program is free software: you can redistribute it and/or modify  it
 * under  the  terms of the GNU General Public License as published  by  the
 * Free  Software  Foundation, either version 3 of the License, or (at  your
 * option) any later version.
 *
 * This  program  is  distributed in the hope that it will  be  useful,  but
 * WITHOUT   ANY   WARRANTY;   without  even   the   implied   warranty   of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
 * Public License for more details.
 *
 * You  should have received a copy of the GNU General Public License  along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * 16 Dec 18         - Initial version - MEJT
 * 20 Dec 18         - Now compiles using VAXC - MEJT
 * 08 Jan 19         - Added swap - MEJT
 *
 * Note - Do NOT use increment and decriment operators with values passed to
 * these macros or the results will not be as intended!
 */

#ifndef TRUNC
#define TRUNC(x) ((x > 0) ? floor(x) : ceil(x))
#endif

#ifndef ROUND
#define ROUND(x) ((x >= 0) ? TRUNC(x + 0.5) : TRUNC(x - 0.5)) /* Note problems with floating point rounding errors.. */
#endif

#ifndef SIGN
#define SIGN(x) ((( x > 0 ) - ( x < 0 )))
#endif

#ifndef MIN
#define MIN(x, y) ((x < y) ? x : y)
#endif

#ifndef MAX
#define MAX(x, y) ((x >= y) ? x : y)
#endif

#ifndef ABS
#define ABS(x) (((x) < 0) ? -(x) : (x))
#endif

#ifndef SWAP
#define SWAP(x, y)({x ^= y; y ^= x; x ^= y;})
#endif