From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/prng/rand_r.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 src/prng/rand_r.c (limited to 'src/prng/rand_r.c') diff --git a/src/prng/rand_r.c b/src/prng/rand_r.c new file mode 100644 index 0000000..638614c --- /dev/null +++ b/src/prng/rand_r.c @@ -0,0 +1,15 @@ +#include + +static unsigned temper(unsigned x) +{ + x ^= x>>11; + x ^= x<<7 & 0x9D2C5680; + x ^= x<<15 & 0xEFC60000; + x ^= x>>18; + return x; +} + +int rand_r(unsigned *seed) +{ + return temper(*seed = *seed * 1103515245 + 12345)/2; +} -- cgit v1.2.3