diff options
Diffstat (limited to 'libc-top-half/musl/src/prng/rand_r.c')
| -rw-r--r-- | libc-top-half/musl/src/prng/rand_r.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/prng/rand_r.c b/libc-top-half/musl/src/prng/rand_r.c new file mode 100644 index 0000000..638614c --- /dev/null +++ b/libc-top-half/musl/src/prng/rand_r.c @@ -0,0 +1,15 @@ +#include <stdlib.h> + +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; +} |