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