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Improve comment at Andrea's request

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This commit is contained in:
Nick Mathewson 2013-02-08 17:13:11 -05:00
parent e998bbcdd5
commit 69ab7cd828
1 changed files with 4 additions and 2 deletions
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6
src/common/util.c
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@ -5010,8 +5010,10 @@ tor_init_weak_random(tor_weak_rng_t *rng, unsigned seed)
int32_t
tor_weak_random(tor_weak_rng_t *rng)
{
/* Here's a linear congruential generator. OpenBSD and glibc use it. We
* don't want to use windows's rand(), because that returns values in the
/* Here's a linear congruential generator. OpenBSD and glibc use these
* parameters; they aren't too bad, and should have maximal period over the
* range 0..INT32_MAX. We don't want to use the platform rand() or random(),
* since some platforms have bad weak RNGs that only return values in the
* range 0..INT16_MAX, which just isn't enough. */
rng->state = (rng->state * 1103515245 + 12345) & 0x7fffffff;
return (int32_t) rng->state;