X-Git-Url: http://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/1c3b0c0e6f9339e76e42f6393e554c7dfc58e205..bc35d987289cb3815a2b59d99c05034cc13a8f40:/t/test.h

diff --git a/t/test.h b/t/test.h
index 5ffe291..091ad88 100644
--- a/t/test.h
+++ b/t/test.h
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2012, 2020 Nick Bowler
+ * Copyright © 2012, 2020, 2022-2023 Nick Bowler
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -59,13 +59,16 @@ struct test_rng *test_rng_alloc(const char *seed);
 void test_rng_free(struct test_rng *rng);
 
 /*
- * Return a random value uniformly on the half-open interval [0,1)
+ * Return a random integer uniformly on the closed interval [0, limit-1]
  */
-double test_rng_uniform(struct test_rng *rng);
+unsigned test_rng_uniform_int(struct test_rng *rng, unsigned limit);
 
 /*
- * Return a random integer uniformly on the closed interval [0, limit-1]
+ * Return false or true with 50% probablility either way.
  */
-unsigned test_rng_uniform_int(struct test_rng *rng, unsigned limit);
+static inline int test_rng_50_50(struct test_rng *rng)
+{
+	return test_rng_uniform_int(rng, 2) == 0;
+}
 
 #endif