36 lines
735 B
C
36 lines
735 B
C
#ifndef RANDOM_PICO_H_
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#define RANDOM_PICO_H_
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#include "pico/rand.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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static int
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hydro_random_init(void)
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{
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const char ctx[hydro_hash_CONTEXTBYTES] = { 'h', 'y', 'd', 'r', 'o', 'P', 'R', 'G' };
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hydro_hash_state st;
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uint16_t ebits = 0;
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hydro_hash_init(&st, ctx, NULL);
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while (ebits < 256) {
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uint32_t r = get_rand_32();
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hydro_hash_update(&st, (const uint32_t *) &r, sizeof r);
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ebits += 32;
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}
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hydro_hash_final(&st, hydro_random_context.state, sizeof hydro_random_context.state);
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hydro_random_context.counter = ~LOAD64_LE(hydro_random_context.state);
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* RANDOM_PICO_H_ */
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