add km_set_init_rand_points()

1 files changed, 13 insertions, 0 deletions

diff --git a/km.h b/km.h
index 82bd835..c70e13e 100644
--- a/km.h
+++ b/km.h
@@ -11,6 +11,7 @@ typedef struct km_rand_t_ km_rand_t;
 // random number source callbacks
 typedef struct {
   _Bool (*fill)(km_rand_t * const, const size_t, float * const);
+  _Bool (*fill_sizes)(km_rand_t * const, const size_t, size_t * const);
   void (*fini)(km_rand_t * const);
 } km_rand_cbs_t;
 
@@ -23,6 +24,9 @@ struct km_rand_t_ {
 // fill buffer with N random floats
 _Bool km_rand_fill(km_rand_t * const, const size_t, float * const);
 
+// fill buffer with N random size_ts
+_Bool km_rand_fill_sizes(km_rand_t * const, const size_t, size_t * const);
+
 // finalize random source
 void km_rand_fini(km_rand_t * const);
 
@@ -82,6 +86,15 @@ _Bool km_set_init_rand_clusters(
   km_rand_t *
 );
 
+// init a set with num_clusters clusters of random points from the
+// given set
+_Bool km_set_init_rand_points(
+  km_set_t * const,
+  const km_set_t * const,
+  const size_t,
+  km_rand_t *
+);
+
 typedef struct {
   float d2;
   size_t cluster;