1 files changed, 56 insertions, 0 deletions
diff --git a/km-rand-libc.c b/km-rand-libc.c
new file mode 100644
index 0000000..da1e4b0
--- /dev/null
+++ b/km-rand-libc.c
@@ -0,0 +1,56 @@
+#include <stdbool.h> // bool
+#include "util.h"
+#include "km.h"
+
+// libc random source get_floats
+static bool
+on_get_floats(
+  km_rand_t * const rs,
+  const size_t num_vals,
+  float * const vals
+) {
+  UNUSED(rs);
+
+  // generate results
+  for (size_t i = 0; i < num_vals; i++) {
+    vals[i] = 1.0 * rand() / RAND_MAX;
+  }
+
+  // return success
+  return true;
+}
+
+// fill sizes callback for system random source
+static bool
+on_get_sizes(
+  km_rand_t * const rs,
+  const size_t num_vals,
+  size_t * const vals
+) {
+  UNUSED(rs);
+
+  // generate results
+  for (size_t i = 0; i < num_vals; i++) {
+    vals[i] = rand();
+  }
+
+  // return success
+  return true;
+}
+
+// system random source callbacks
+static const km_rand_cbs_t
+LIBC_RAND_CBS = {
+  .get_floats = on_get_floats,
+  .get_sizes  = on_get_sizes,
+  .fini       = NULL,
+};
+
+// init system random source (uses system rand())
+void
+km_rand_init_libc(
+  km_rand_t * const rs
+) {
+  rs->cbs = &LIBC_RAND_CBS;
+  rs->data = NULL;
+}