Graphviz  2.41.20170921.2350
arith.h
Go to the documentation of this file.
1 /* $Id$ $Revision$ */
2 /* vim:set shiftwidth=4 ts=8: */
3 
4 /*************************************************************************
5  * Copyright (c) 2011 AT&T Intellectual Property
6  * All rights reserved. This program and the accompanying materials
7  * are made available under the terms of the Eclipse Public License v1.0
8  * which accompanies this distribution, and is available at
9  * http://www.eclipse.org/legal/epl-v10.html
10  *
11  * Contributors: See CVS logs. Details at http://www.graphviz.org/
12  *************************************************************************/
13 
14 /* geometric functions (e.g. on points and boxes) with application to, but
15  * no specific dependence on graphs */
16 
17 #ifndef GV_ARITH_H
18 #define GV_ARITH_H
19 
20 /* for sincos */
21 #ifndef _GNU_SOURCE
22 #define _GNU_SOURCE 1
23 #endif
24 
25 #include <limits.h>
26 #include <math.h>
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
32 #ifdef MIN
33 #undef MIN
34 #endif
35 #define MIN(a,b) ((a)<(b)?(a):(b))
36 
37 #ifdef MAX
38 #undef MAX
39 #endif
40 #define MAX(a,b) ((a)>(b)?(a):(b))
41 
42 #ifdef ABS
43 #undef ABS
44 #endif
45 #define ABS(a) ((a) >= 0 ? (a) : -(a))
46 
47 #define AVG(a,b) ((a + b) / 2)
48 #define SGN(a) (((a)<0)? -1 : 1)
49 #define CMP(a,b) (((a)<(b)) ? -1 : (((a)>(b)) ? 1 : 0))
50 
51 #ifndef INT_MAX
52 #define INT_MAX ((int)(~(unsigned)0 >> 1))
53 #endif
54 
55 #ifndef INT_MIN
56 #define INT_MIN (-INT_MAX - 1)
57 #endif
58 
59 #ifndef MAXSHORT
60 #define MAXSHORT (0x7fff)
61 #endif
62 
63 #ifndef MAXDOUBLE
64 #define MAXDOUBLE 1.7976931348623157e+308
65 #endif
66 
67 #ifndef MAXFLOAT
68 #define MAXFLOAT ((float)3.40282347e+38)
69 #endif
70 
71 #ifdef BETWEEN
72 #undef BETWEEN
73 #endif
74 #define BETWEEN(a,b,c) (((a) <= (b)) && ((b) <= (c)))
75 
76 #ifndef M_PI
77 #define M_PI 3.14159265358979323846
78 #endif
79 
80 #ifndef SQRT2
81 #define SQRT2 1.41421356237309504880
82 #endif
83 
84 #define ROUND(f) ((f>=0)?(int)(f + .5):(int)(f - .5))
85 #define RADIANS(deg) ((deg)/180.0 * M_PI)
86 #define DEGREES(rad) ((rad)/M_PI * 180.0)
87 
88 #define SQR(a) ((a) * (a))
89 
90 #ifdef HAVE_SINCOS
91  extern void sincos(double x, double *s, double *c);
92 #else
93 # define sincos(x,s,c) *s = sin(x); *c = cos(x)
94 #endif
95 
96 #ifdef __cplusplus
97 }
98 #endif
99 
100 #endif
Definition: grammar.c:79
#define sincos(x, s, c)
Definition: arith.h:93