Daniel@0: /* $Id: arith.h,v 1.16 2009/06/03 01:10:51 ellson Exp $ $Revision: 1.16 $ */
Daniel@0: /* vim:set shiftwidth=4 ts=8: */
Daniel@0: 
Daniel@0: /**********************************************************
Daniel@0: *      This software is part of the graphviz package      *
Daniel@0: *                http://www.graphviz.org/                 *
Daniel@0: *                                                         *
Daniel@0: *            Copyright (c) 1994-2004 AT&T Corp.           *
Daniel@0: *                and is licensed under the                *
Daniel@0: *            Common Public License, Version 1.0           *
Daniel@0: *                      by AT&T Corp.                      *
Daniel@0: *                                                         *
Daniel@0: *        Information and Software Systems Research        *
Daniel@0: *              AT&T Research, Florham Park NJ             *
Daniel@0: **********************************************************/
Daniel@0: 
Daniel@0: /* geometric functions (e.g. on points and boxes) with application to, but
Daniel@0:  * no specific dependance on graphs */
Daniel@0: 
Daniel@0: #ifndef GV_ARITH_H
Daniel@0: #define GV_ARITH_H
Daniel@0: 
Daniel@0: /* for sincos */
Daniel@0: #ifndef _GNU_SOURCE
Daniel@0: #define _GNU_SOURCE 1
Daniel@0: #endif
Daniel@0: 
Daniel@0: #include <limits.h>
Daniel@0: #ifdef HAVE_VALUES_H
Daniel@0: #include <values.h>
Daniel@0: #endif
Daniel@0: #include <math.h>
Daniel@0: 
Daniel@0: #ifdef __cplusplus
Daniel@0: extern "C" {
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifdef MIN
Daniel@0: #undef MIN
Daniel@0: #endif
Daniel@0: #define MIN(a,b)	((a)<(b)?(a):(b))
Daniel@0: 
Daniel@0: #ifdef MAX
Daniel@0: #undef MAX
Daniel@0: #endif
Daniel@0: #define MAX(a,b)	((a)>(b)?(a):(b))
Daniel@0: 
Daniel@0: #ifdef ABS
Daniel@0: #undef ABS
Daniel@0: #endif
Daniel@0: #define ABS(a)		((a) >= 0 ? (a) : -(a))
Daniel@0: 
Daniel@0: #define AVG(a,b)	((a + b) / 2)
Daniel@0: #define SGN(a)		(((a)<0)? -1 : 1)
Daniel@0: #define CMP(a,b)	(((a)<(b)) ? -1 : (((a)>(b)) ? 1 : 0))
Daniel@0: 
Daniel@0: #ifndef INT_MAX
Daniel@0: #define	INT_MAX		((int)(~(unsigned)0 >> 1))
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifndef INT_MIN
Daniel@0: #define INT_MIN		(-INT_MAX - 1)
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifndef MAXSHORT
Daniel@0: #define	MAXSHORT	(0x7fff)
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifndef MAXDOUBLE
Daniel@0: #define MAXDOUBLE	1.7976931348623157e+308
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifndef MAXFLOAT
Daniel@0: #define MAXFLOAT	((float)3.40282347e+38)
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifdef BETWEEN
Daniel@0: #undef BETWEEN
Daniel@0: #endif
Daniel@0: #define BETWEEN(a,b,c)	(((a) <= (b)) && ((b) <= (c)))
Daniel@0: 
Daniel@0: #ifndef M_PI
Daniel@0: #define M_PI		3.14159265358979323846
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifndef SQRT2
Daniel@0: #define SQRT2		1.41421356237309504880
Daniel@0: #endif
Daniel@0: 
Daniel@0: #define ROUND(f)        ((f>=0)?(int)(f + .5):(int)(f - .5))
Daniel@0: #define RADIANS(deg)	((deg)/180.0 * M_PI)
Daniel@0: #define DEGREES(rad)	((rad)/M_PI * 180.0)
Daniel@0: 
Daniel@0: #define SQR(a) ((a) * (a))
Daniel@0: 
Daniel@0: #ifdef HAVE_SINCOS
Daniel@0:     extern void sincos(double x, double *s, double *c);
Daniel@0: #else
Daniel@0: # define sincos(x,s,c) *s = sin(x); *c = cos(x)
Daniel@0: #endif
Daniel@0: 
Daniel@0: #ifdef __cplusplus
Daniel@0: }
Daniel@0: #endif
Daniel@0: 
Daniel@0: #endif