src/utility.h

   1 /*! \file utility.h
   2
   3 */
   4
   5 #ifndef XUNI_GUARD_UTILITY_H
   6 #define XUNI_GUARD_UTILITY_H 1
   7
   8 #include <stdlib.h>
   9 #include <math.h>
  10
  11 #include "loadso.h"
  12
  13 #ifdef __cplusplus
  14 extern "C" {
  15 #endif
  16
  17 #ifdef PI
  18 #define CONSTANT_PI PI
  19 #elif defined(M_PI)
  20 #define CONSTANT_PI M_PI
  21 #else
  22 #define CONSTANT_PI 3.14159265358979323846264338327950288419716939937510582097
  23 #endif
  24
  25 struct string_function_t {
  26     const char *str;
  27     func_point_t data;
  28 };
  29
  30 struct string_index_t {
  31     const char *str;
  32     size_t index;
  33 };
  34
  35 func_point_t string_to_function(const struct string_function_t *data,
  36     size_t n, const char *find);
  37 size_t string_to_index(const struct string_index_t *str, size_t n,
  38     const char *find);
  39
  40 double degrees_to_radians(double angle);
  41 double radians_to_degrees(double angle);
  42
  43 int binary_insertion_sort(void *data, size_t n, void *find, size_t *pos,
  44     int (*compare)(void *data, size_t n, void *find));
  45
  46 #ifdef __cplusplus
  47 }
  48 #endif
  49
  50 #endif