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#include <stdbool.h>
#include "util.h"
#include "km.h"
// fill buffer with N random floats
bool
km_rand_fill(
km_rand_t * const rs,
const size_t num_floats,
float * const floats
) {
return rs->cbs->fill(rs, num_floats, floats);
}
// fill buffer with N random size_ts
bool
km_rand_fill_sizes(
km_rand_t * const rs,
const size_t num_sizes,
size_t * const sizes
) {
return rs->cbs->fill_sizes(rs, num_sizes, sizes);
}
// finalize random source
void
km_rand_fini(
km_rand_t * const rs
) {
if (rs->cbs->fini) {
rs->cbs->fini(rs);
}
}
// fill callback for system random source
static bool
system_on_fill(
km_rand_t * const rs,
const size_t num_floats,
float * const floats
) {
UNUSED(rs);
// generate random cluster centers
for (size_t i = 0; i < num_floats; i++) {
floats[i] = 1.0 * rand() / RAND_MAX;
}
// return success
return true;
}
// fill sizes callback for system random source
static bool
system_on_fill_sizes(
km_rand_t * const rs,
const size_t num_sizes,
size_t * const sizes
) {
UNUSED(rs);
// generate random size_ts
for (size_t i = 0; i < num_sizes; i++) {
sizes[i] = rand();
}
// return success
return true;
}
// system random source callbacks
static const km_rand_cbs_t
SYSTEM_CBS = {
.fill = system_on_fill,
.fill_sizes = system_on_fill_sizes,
.fini = NULL,
};
// init system random source (uses system rand())
void
km_rand_init_system(
km_rand_t * const rs
) {
rs->cbs = &SYSTEM_CBS;
rs->data = NULL;
}
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