File: xmath.hc

package info (click to toggle)
craft 3.5-12
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k
  • size: 18,172 kB
  • ctags: 1,605
  • sloc: cpp: 3,794; makefile: 2,322; ansic: 857; sh: 842
file content (195 lines) | stat: -rw-r--r-- 4,343 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/*======================================================================*/
/*= CHANGES AND UPDATES                                                =*/
/*======================================================================*/
/*= date   person file       subject                                   =*/
/*=--------------------------------------------------------------------=*/
/*=                                                                    =*/
/*= 170293 hua    xmath.hc   added i_abs                               =*/
/*=                                                                    =*/
/*======================================================================*/

#include "xmath.h"
#include "bool.h"
#include "objects.h"

extern "C" {
double drand48 ();
void srand48(long seedval);
}

bool b_on (int bits, int bno)
  {return ((bits & (1 << bno)) != 0);
  }

int b_set (int current, int bno)
  {return current | (1 << bno);
  }

int b_reset (int current, int bno)
  {return current & (~(1 << bno));
  }

int i_abs (int a)
  {return (a < 0) ? -a : a;
  }
  
int i_sign (int a)
  {if      (a == 0) return 0;
   else if (a >  0) return 1;
   else             return -1;
  }

int i_min (int a, int b)
  {return (a < b) ? a : b;
  }

int i_max (int a, int b)
  {return (a < b) ? b : a;
  }

int i_mean (int a, int b)
  {return (a + b) / 2;
  }

int i_bound (int min, int i, int max)
  {return (i_min (max, i_max (min, i)));
  }

int i_random (int lower_bound, int upper_bound)
  {return (int) d_random ((double) lower_bound, (double) upper_bound+1-0.001);
  }

double d_min (double a, double b)
  {return (a < b) ? a : b;
  }

double d_max (double a, double b)
  {return (a < b) ? b : a;
  }

double d_bound (double vmin, double v, double vmax)
  {return (d_min (vmax, d_max (vmin, v)));
  }

double d_abs (double a)
  {return (a < 0) ? -a : a;
  }

double d_sign (double a)
  {if      (a == 0) return 0;
   else if (a >  0) return 1;
   else             return -1;
  }
      
double d_round (double d, int s)
  {int i = (int) (d * s);

   return ((double) i / s);
  }

double g_sin (double x)
  {return sin ((x / 180) * M_PI);
  }

double g_arc_tan2 (double dx, double dy)
  {return (atan2 (dy, dx) * 180 / M_PI);
  }

double g_cos (double x)
  {return cos ((x / 180) * M_PI);
  }

double g_arc_sin (double x)
  {return asin (x) * 180 / M_PI;
  }

double g_arc_cos (double x)
  {return acos (x) * 180 / M_PI;
  }

double g_norm (double a)
  {if   (a >= 360)
        return a - 360;
   if   (a < 0)
        return a + 360;
   else return a;
 }

double g_diff (double a1, double a2)
  {
    return g_norm (a2 - a1);
  } 

double d_random (double lower_bound, double upper_bound)
  {return (drand48 () * (upper_bound - lower_bound) + lower_bound);
  }

void d_randomize (int d)
  {srand48 (d);
  }

float f_min (float a, float b)
  {return (a < b) ? a : b;
  }

float f_max (float a, float b)
  {return (a < b) ? b : a;
  }

int nible (char c)
  {if (c == '0')             return 0;
   if (c == '1')             return 1;
   if (c == '2')             return 2;
   if (c == '3')             return 3;
   if (c == '4')             return 4;
   if (c == '5')             return 5;
   if (c == '6')             return 6;
   if (c == '7')             return 7;
   if (c == '8')             return 8;
   if (c == '9')             return 9;
   if (c == 'a' || c == 'A') return 10;
   if (c == 'b' || c == 'B') return 11;
   if (c == 'c' || c == 'C') return 12;
   if (c == 'd' || c == 'D') return 13;
   if (c == 'e' || c == 'E') return 14;
   if (c == 'f' || c == 'F') return 15;
  }

int hextoint (char hex [])
  {return ((nible (hex [0]) * 16) + nible (hex [1]));
  }

char hnible (int i)
  {switch (i)
     {case 0  : return '0';
      case 1  : return '1';
      case 2  : return '2';
      case 3  : return '3';
      case 4  : return '4';
      case 5  : return '5';
      case 6  : return '6';
      case 7  : return '7';
      case 8  : return '8';
      case 9  : return '9';
      case 10 : return 'a';
      case 11 : return 'b';
      case 12 : return 'c';
      case 13 : return 'd';
      case 14 : return 'e';
      case 15 : return 'f';
     };
  }   

char *inttohex (int i)
  {static char r [128];

   fill_r;
   return r;

.  fill_r
     {r [0] = hnible (i / 16);
      r [1] = hnible (i % 16);
      r [2] = 0;
     }.

  }