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#ifndef UTIL_H
#define UTIL_H
#include <stdio.h> // fprintf()
#include <stdlib.h> // exit()
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define UNUSED(a) ((void) (a))
#define D(...) do { \
fprintf(stderr, "DEBUG: %s(): ", __func__); \
fprintf(stderr, __VA_ARGS__); \
fputs("\n", stderr); \
} while (0)
#define die(...) do { \
fputs("FATAL: ", stderr); \
fprintf(stderr, __VA_ARGS__); \
fputs("\n", stderr); \
exit(EXIT_FAILURE); \
} while (0)
// calculate squared euclidean distance between two points
static inline float
distance_squared(
const size_t num_floats,
const float * const a,
const float * const b
) {
float r = 0.0;
for (size_t i = 0; i < num_floats; i++) {
r += (b[i] - a[i]) * (b[i] - a[i]);
}
// return squared distance
return r;
}
static inline float
km_score(
const float mean_distance,
const size_t num_empty
) {
return 1.0 / (mean_distance + num_empty);
}
#endif /* UTIL_H */
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