From f557d1f49a2914c6084dd18efc783395228d8ce0 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Tue, 5 Feb 2019 00:22:15 -0500
Subject: mv *.[hc] src/

---
 src/km-rand-libc.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 src/km-rand-libc.c

(limited to 'src/km-rand-libc.c')

diff --git a/src/km-rand-libc.c b/src/km-rand-libc.c
new file mode 100644
index 0000000..da1e4b0
--- /dev/null
+++ b/src/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;
+}
-- 
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