39 lines
581 B
C
39 lines
581 B
C
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#include "random.h"
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#include <time.h>
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static uint64_t seed;
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static bool enabled = true;
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uint8_t GB_random(void)
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{
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if (!enabled) return 0;
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seed *= 0x27BB2EE687B0B0FDL;
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seed += 0xB504F32D;
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return seed >> 56;
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}
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uint32_t GB_random32(void)
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{
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GB_random();
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return seed >> 32;
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}
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void GB_random_seed(uint64_t new_seed)
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{
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seed = new_seed;
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}
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void GB_random_set_enabled(bool enable)
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{
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enabled = enable;
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}
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static void __attribute__((constructor)) init_seed(void)
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{
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seed = time(NULL);
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for (unsigned i = 64; i--;) {
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GB_random();
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}
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}
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