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26 lines
957 B
26 lines
957 B
4 years ago
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#ifndef _RNG_H
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#define _RNG_H
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typedef struct rng_algo *RNG; //RNG algorithm reference
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#define rng_reinterpret(rng, value, type) (*((type*)rng_next(rng, &value, sizeof(type))))
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#define rng_reinterpret_new(rng, value, type) (*((type*)rng_next(rng, malloc(sizeof(type)), sizeof(type))))
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#define rng_reinterpret_stackalloc(rng, value, type) rng_reinterpret(rng, alloca(sizeof(type)), type)
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#define RNG_LEXBIND(rng, type, name) type name = rng_reinterpret(rng, name, type)
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double rng_next_double(RNG algo);
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int rng_next_int_bounded(RNG algo, int min, int max);
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int rng_next_int(RNG algo, int max);
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void* rng_next(RNG algo, void* data, int len);
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int rng_chance(RNG algo, double d);
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void rng_free(RNG algo);
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void rng_seed(RNG algo, void* seed);
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RNG rng_new(RNG (*instantiate)(void));
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#define RNG_IMPL_DEFINITION(name) RNG __rng_impl_ ## name(void)
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#define RNG_ALGO(name) &__rng_impl_ ## name
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#define RNG_NEW(name) rng_new(RNG_ALGO(name))
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#endif /* _RNG_H */
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