mv *.[hc] src/

1 files changed, 43 insertions, 0 deletions

diff --git a/src/km-init-rand.c b/src/km-init-rand.c
new file mode 100644
index 0000000..1f59da8
--- /dev/null
+++ b/src/km-init-rand.c
@@ -0,0 +1,43 @@
+#include <stdbool.h> // bool
+#include <string.h> // memset()
+#include "util.h"
+#include "km.h"
+
+// init a set with num_clusters clusters of shape num_floats by picking
+// random cluster centers
+bool
+km_init_rand(
+  km_set_t * const cs,
+  const size_t num_clusters,
+  const km_set_t * const set,
+  km_rand_t * const rs
+) {
+  // get number of floats from data set
+  const size_t num_floats = set->shape.num_floats;
+
+  // init cluster shape
+  const km_shape_t shape = {
+    .num_floats = num_floats,
+    .num_ints = 1,
+  };
+
+  // generate random cluster centers
+  float floats[num_floats * num_clusters];
+  if (!km_rand_get_floats(rs, num_floats * num_clusters, floats)) {
+    // return failure
+    return false;
+  }
+
+  // FIXME: should probably be heap-allocated
+  int ints[num_clusters];
+  memset(ints, 0, sizeof(ints));
+
+  // init cluster set
+  if (!km_set_init(cs, &shape, num_clusters)) {
+    // return failure
+    return false;
+  }
+
+  // add data, return result
+  return km_set_push(cs, num_clusters, floats, ints);
+}