4  * Currently uses SHA-256 to scramble the PRNG state.
146 	prng_state state = { .next_word = 0 };  in prng_init()  local
149 	sha256_hash(ARRAY_SIZE(seed_arr), &seed_arr, &state.hash);  in prng_init()
150 	return state;  in prng_init()
153 static void prng_scramble(prng_state *state)  in prng_scramble()  argument
157 	memcpy(input, state->hash, sizeof(state->hash));  in prng_scramble()
158 	sha256_hash(ARRAY_SIZE(input), &input, &state->hash);  in prng_scramble()
159 	state->next_word = 0;  in prng_scramble()
162 uint32_t prng32(prng_state *state)  in prng32()  argument
164 	if (state->next_word < ARRAY_SIZE(state->hash))  in prng32()
165 		return state->hash[state->next_word++];  in prng32()
167 	prng_scramble(state);  in prng32()
168 	return prng32(state);  in prng32()
171 uint64_t prng64(prng_state *state)  in prng64()  argument
174 	uint64_t high = prng32(state);  in prng64()
176 	return high << 32 | prng32(state);  in prng64()