diff options
Diffstat (limited to 'thirdparty/misc/pcg.cpp')
-rw-r--r-- | thirdparty/misc/pcg.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/thirdparty/misc/pcg.cpp b/thirdparty/misc/pcg.cpp index c421e16f89..5f4bf40460 100644 --- a/thirdparty/misc/pcg.cpp +++ b/thirdparty/misc/pcg.cpp @@ -23,3 +23,13 @@ void pcg32_srandom_r(pcg32_random_t* rng, uint64_t initstate, uint64_t initseq) rng->state += initstate; pcg32_random_r(rng); } + +// Source from https://github.com/imneme/pcg-c-basic/blob/master/pcg_basic.c +uint32_t pcg32_boundedrand_r(pcg32_random_t *rng, uint32_t bound) { + uint32_t threshold = -bound % bound; + for (;;) { + uint32_t r = pcg32_random_r(rng); + if (r >= threshold) + return r % bound; + } +} |