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90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*************************************************************************
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* Copyright (c) 2011 AT&T Intellectual Property
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors: Details at https://graphviz.org
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*************************************************************************/
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/* geometric functions (e.g. on points and boxes) with application to, but
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* no specific dependence on graphs */
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#pragma once
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/* for sincos */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include <limits.h>
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#include <math.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef MIN
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#undef MIN
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#endif
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#define MIN(a,b) ((a)<(b)?(a):(b))
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#ifdef MAX
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#undef MAX
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#endif
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define AVG(a,b) ((a + b) / 2)
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#define SGN(a) (((a)<0)? -1 : 1)
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#define CMP(a,b) (((a)<(b)) ? -1 : (((a)>(b)) ? 1 : 0))
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#ifndef INT_MAX
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#define INT_MAX ((int)(~(unsigned)0 >> 1))
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#endif
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#ifndef INT_MIN
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#define INT_MIN (-INT_MAX - 1)
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#endif
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#ifndef MAXSHORT
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#define MAXSHORT (0x7fff)
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#endif
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#ifndef MAXDOUBLE
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#define MAXDOUBLE 1.7976931348623157e+308
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#endif
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#ifndef MAXFLOAT
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#define MAXFLOAT ((float)3.40282347e+38) // exact value: 0x1.fffffep+127f
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#endif
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#ifdef BETWEEN
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#undef BETWEEN
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#endif
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#define BETWEEN(a,b,c) (((a) <= (b)) && ((b) <= (c)))
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifndef SQRT2
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#define SQRT2 1.41421356237309504880
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#endif
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#define ROUND(f) ((f>=0)?(int)(f + .5):(int)(f - .5))
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#define RADIANS(deg) ((deg)/180.0 * M_PI)
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#define DEGREES(rad) ((rad)/M_PI * 180.0)
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#define SQR(a) ((a) * (a))
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#ifdef HAVE_SINCOS
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extern void sincos(double x, double *s, double *c);
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#else
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# define sincos(x,s,c) *s = sin(x); *c = cos(x)
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#endif
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#ifdef __cplusplus
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}
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#endif
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