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1 /* $Id: arith.h,v 1.16 2009/06/03 01:10:51 ellson Exp $ $Revision: 1.16 $ */
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2 /* vim:set shiftwidth=4 ts=8: */
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3
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4 /**********************************************************
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5 * This software is part of the graphviz package *
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6 * http://www.graphviz.org/ *
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7 * *
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8 * Copyright (c) 1994-2004 AT&T Corp. *
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9 * and is licensed under the *
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10 * Common Public License, Version 1.0 *
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11 * by AT&T Corp. *
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12 * *
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13 * Information and Software Systems Research *
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14 * AT&T Research, Florham Park NJ *
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15 **********************************************************/
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16
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17 /* geometric functions (e.g. on points and boxes) with application to, but
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18 * no specific dependance on graphs */
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19
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20 #ifndef GV_ARITH_H
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21 #define GV_ARITH_H
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22
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23 /* for sincos */
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24 #ifndef _GNU_SOURCE
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25 #define _GNU_SOURCE 1
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26 #endif
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27
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28 #include <limits.h>
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29 #ifdef HAVE_VALUES_H
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30 #include <values.h>
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31 #endif
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32 #include <math.h>
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33
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif
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37
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38 #ifdef MIN
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39 #undef MIN
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40 #endif
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41 #define MIN(a,b) ((a)<(b)?(a):(b))
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42
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43 #ifdef MAX
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44 #undef MAX
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45 #endif
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46 #define MAX(a,b) ((a)>(b)?(a):(b))
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47
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48 #ifdef ABS
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49 #undef ABS
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50 #endif
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51 #define ABS(a) ((a) >= 0 ? (a) : -(a))
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52
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53 #define AVG(a,b) ((a + b) / 2)
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54 #define SGN(a) (((a)<0)? -1 : 1)
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55 #define CMP(a,b) (((a)<(b)) ? -1 : (((a)>(b)) ? 1 : 0))
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56
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57 #ifndef INT_MAX
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58 #define INT_MAX ((int)(~(unsigned)0 >> 1))
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59 #endif
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60
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61 #ifndef INT_MIN
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62 #define INT_MIN (-INT_MAX - 1)
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63 #endif
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64
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65 #ifndef MAXSHORT
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66 #define MAXSHORT (0x7fff)
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67 #endif
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68
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69 #ifndef MAXDOUBLE
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70 #define MAXDOUBLE 1.7976931348623157e+308
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71 #endif
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72
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73 #ifndef MAXFLOAT
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74 #define MAXFLOAT ((float)3.40282347e+38)
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75 #endif
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76
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77 #ifdef BETWEEN
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78 #undef BETWEEN
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79 #endif
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80 #define BETWEEN(a,b,c) (((a) <= (b)) && ((b) <= (c)))
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81
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82 #ifndef M_PI
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83 #define M_PI 3.14159265358979323846
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84 #endif
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85
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86 #ifndef SQRT2
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87 #define SQRT2 1.41421356237309504880
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88 #endif
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89
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90 #define ROUND(f) ((f>=0)?(int)(f + .5):(int)(f - .5))
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91 #define RADIANS(deg) ((deg)/180.0 * M_PI)
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92 #define DEGREES(rad) ((rad)/M_PI * 180.0)
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93
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94 #define SQR(a) ((a) * (a))
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95
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96 #ifdef HAVE_SINCOS
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97 extern void sincos(double x, double *s, double *c);
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98 #else
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99 # define sincos(x,s,c) *s = sin(x); *c = cos(x)
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100 #endif
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101
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102 #ifdef __cplusplus
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103 }
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104 #endif
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105
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106 #endif
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