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Fixing random number generation so that it returns same numbers as

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before.

That broke a lot of tests.
This commit is contained in:
Robin Sommer 2013-07-24 16:34:52 -07:00
parent 599dadf30b
commit d8226169b8
3 changed files with 16 additions and 4 deletions
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16
src/H3.h
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@ -66,17 +66,29 @@
template <typename T, int N>
class H3 {
public:
H3(T seed = bro_random())
H3()
{
Init(false, 0);
}
H3(T seed)
{
Init(true, seed);
}
void Init(bool have_seed, T seed)
{
T bit_lookup[N * CHAR_BIT];
for ( size_t bit = 0; bit < N * CHAR_BIT; bit++ )
{
bit_lookup[bit] = 0;
seed = bro_prng(seed);
for ( size_t i = 0; i < sizeof(T)/2; i++ )
{
seed = have_seed ? bro_prng(seed) : bro_random();
// assume random() returns at least 16 random bits
bit_lookup[bit] = (bit_lookup[bit] << 16) | (seed & 0xFFFF);
}
}
for ( size_t byte = 0; byte < N; byte++ )