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92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
#ifndef RUBY_RANDOM_H
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#define RUBY_RANDOM_H 1
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/**
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* @file
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* @date Sat May 7 11:51:14 JST 2016
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* @copyright 2007-2020 Yukihiro Matsumoto
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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*/
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#include "ruby/ruby.h"
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RBIMPL_SYMBOL_EXPORT_BEGIN()
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struct rb_random_struct {
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VALUE seed;
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};
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typedef struct rb_random_struct rb_random_t;
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typedef void rb_random_init_func(rb_random_t *, const uint32_t *, size_t);
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typedef unsigned int rb_random_get_int32_func(rb_random_t *);
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typedef void rb_random_get_bytes_func(rb_random_t *, void *, size_t);
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typedef double rb_random_get_real_func(rb_random_t *, int);
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typedef struct {
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size_t default_seed_bits;
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rb_random_init_func *init;
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rb_random_get_int32_func *get_int32;
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rb_random_get_bytes_func *get_bytes;
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rb_random_get_real_func *get_real;
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} rb_random_interface_t;
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#define RB_RANDOM_INTERFACE_DECLARE(prefix) \
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static void prefix##_init(rb_random_t *, const uint32_t *, size_t); \
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static unsigned int prefix##_get_int32(rb_random_t *); \
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static void prefix##_get_bytes(rb_random_t *, void *, size_t)
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#define RB_RANDOM_INTERFACE_DECLARE_WITH_REAL(prefix) \
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RB_RANDOM_INTERFACE_DECLARE(prefix); \
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static double prefix##_get_real(rb_random_t *, int)
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#define RB_RANDOM_INTERFACE_DEFINE(prefix) \
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prefix##_init, \
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prefix##_get_int32, \
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prefix##_get_bytes
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#define RB_RANDOM_INTERFACE_DEFINE_WITH_REAL(prefix) \
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RB_RANDOM_INTERFACE_DEFINE(prefix), \
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prefix##_get_real
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#if defined _WIN32 && !defined __CYGWIN__
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typedef rb_data_type_t rb_random_data_type_t;
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# define RB_RANDOM_PARENT 0
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#else
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typedef const rb_data_type_t rb_random_data_type_t;
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# define RB_RANDOM_PARENT &rb_random_data_type
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#endif
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#define RB_RANDOM_DATA_INIT_PARENT(random_data) \
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rbimpl_random_data_init_parent(&random_data)
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void rb_random_mark(void *ptr);
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void rb_random_base_init(rb_random_t *rnd);
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double rb_int_pair_to_real(uint32_t a, uint32_t b, int excl);
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void rb_rand_bytes_int32(rb_random_get_int32_func *, rb_random_t *, void *, size_t);
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RUBY_EXTERN const rb_data_type_t rb_random_data_type;
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RBIMPL_SYMBOL_EXPORT_END()
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RBIMPL_ATTR_PURE_UNLESS_DEBUG()
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/* :TODO: can this function be __attribute__((returns_nonnull)) or not? */
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static inline const rb_random_interface_t *
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rb_rand_if(VALUE obj)
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{
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RBIMPL_ASSERT_OR_ASSUME(RTYPEDDATA_P(obj));
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const struct rb_data_type_struct *t = RTYPEDDATA_TYPE(obj);
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const void *ret = t->data;
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return RBIMPL_CAST((const rb_random_interface_t *)ret);
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}
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RBIMPL_ATTR_NOALIAS()
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static inline void
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rbimpl_random_data_init_parent(rb_random_data_type_t *random_data)
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{
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#if defined _WIN32 && !defined __CYGWIN__
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random_data->parent = &rb_random_data_type;
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#endif
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}
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#endif /* RUBY_RANDOM_H */
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