libmysofa-sys 0.2.1

Low level binding for libmysofa library
Documentation 
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#include "../hrtf/tools.h"
#include "tests.h"
#include <stdio.h>
#include <string.h>

static void copy(float *dst, float *src) {
  memcpy(dst, src, sizeof(float) * 3);
}

static void print(float *c) {
#ifdef VDEBUG
  printf("%f %f %f\n", c[0], c[1], c[2]);
#endif
}

static int same(float *a, float *b) {
  return fequals(a[0], b[0]) && fequals(a[1], b[1]) && fequals(a[2], b[2]);
}

void test_coordinates() {
  float array000[3] = {0, 0, 0};
  float array100[3] = {1, 0, 0};
  float array010[3] = {0, 1, 0};
  float array001[3] = {0, 0, 1};
  float array0901[3] = {0, 90, 1};
  float array9001[3] = {90, 0, 1};
  float result[3] = {1, 1, 1};

  CU_ASSERT(!same(array000, result));
  copy(result, array000);
  CU_ASSERT(same(array000, result));
  print(result);

  convertCartesianToSpherical(result, 3);
  CU_ASSERT(same(array000, result));
  convertSphericalToCartesian(result, 3);
  CU_ASSERT(same(array000, result));

  copy(result, array100);
  convertCartesianToSpherical(result, 3);
  CU_ASSERT(same(array001, result));
  convertSphericalToCartesian(result, 3);
  CU_ASSERT(same(array100, result));
  print(result);

  copy(result, array100);
  mysofa_c2s(result);
  CU_ASSERT(same(array001, result));
  mysofa_s2c(result);
  CU_ASSERT(same(array100, result));
  print(result);

  copy(result, array001);
  convertCartesianToSpherical(result, 3);
  print(result);
  CU_ASSERT(same(array0901, result));
  convertSphericalToCartesian(result, 3);
  CU_ASSERT(same(array001, result));

  copy(result, array010);
  convertCartesianToSpherical(result, 3);
  print(result);
  CU_ASSERT(same(array9001, result));
  convertSphericalToCartesian(result, 3);
  CU_ASSERT(same(array010, result));
}

static int cmp(const void *key, const void *elt) {
  int a1 = *(int *)key;
  int a2 = *(int *)elt;
  if (a1 < a2)
    return -1;
  if (a2 < a1)
    return 1;
  return 0;
}

void test_nsearch() {
  int array[] = {10, 20, 30, 40, 50};
  int l, h;
  int key;

  CU_ASSERT(cmp(array, array + 1) < 0);
  CU_ASSERT(cmp(array, array) == 0);
  CU_ASSERT(cmp(array + 1, array) > 0);

  key = 10;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 0 && h == 0);

  key = 20;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 1 && h == 1);

  key = 50;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 4 && h == 4);

  key = 0;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l < 0 && h == 0);

  key = 60;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 4 && h < 0);

  key = 11;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 0 && h == 1);

  key = 41;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 3 && h == 4);

  key = 19;
  nsearch(&key, (char *)array, 5, sizeof(int), cmp, &l, &h);
  CU_ASSERT(l == 0 && h == 1);
}