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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 11:19:16 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 12:07:37 +0000 |
commit | b485aab7e71c1625cfc27e0f92c9509f42378458 (patch) | |
tree | ae9abe108601079d1679194de237c9a435ae5b55 /web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c | |
parent | Adding upstream version 1.44.3. (diff) | |
download | netdata-b485aab7e71c1625cfc27e0f92c9509f42378458.tar.xz netdata-b485aab7e71c1625cfc27e0f92c9509f42378458.zip |
Adding upstream version 1.45.3+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c')
-rw-r--r-- | web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c | 349 |
1 files changed, 0 insertions, 349 deletions
diff --git a/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c b/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c deleted file mode 100644 index b865244cc..000000000 --- a/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/random.c +++ /dev/null @@ -1,349 +0,0 @@ -/* -** random.c - Random module -** -** See Copyright Notice in mruby.h -*/ - -#include <mruby.h> -#include <mruby/variable.h> -#include <mruby/class.h> -#include <mruby/data.h> -#include <mruby/array.h> -#include "mt19937ar.h" - -#include <time.h> - -static char const MT_STATE_KEY[] = "$mrb_i_mt_state"; - -static const struct mrb_data_type mt_state_type = { - MT_STATE_KEY, mrb_free, -}; - -static mrb_value mrb_random_rand(mrb_state *mrb, mrb_value self); -static mrb_value mrb_random_srand(mrb_state *mrb, mrb_value self); - -static void -mt_srand(mt_state *t, unsigned long seed) -{ - mrb_random_init_genrand(t, seed); -} - -static unsigned long -mt_rand(mt_state *t) -{ - return mrb_random_genrand_int32(t); -} - -static double -mt_rand_real(mt_state *t) -{ - return mrb_random_genrand_real1(t); -} - -static mrb_value -mrb_random_mt_srand(mrb_state *mrb, mt_state *t, mrb_value seed) -{ - if (mrb_nil_p(seed)) { - seed = mrb_fixnum_value((mrb_int)(time(NULL) + mt_rand(t))); - if (mrb_fixnum(seed) < 0) { - seed = mrb_fixnum_value(0 - mrb_fixnum(seed)); - } - } - - mt_srand(t, (unsigned) mrb_fixnum(seed)); - - return seed; -} - -static mrb_value -mrb_random_mt_rand(mrb_state *mrb, mt_state *t, mrb_value max) -{ - mrb_value value; - - if (mrb_fixnum(max) == 0) { - value = mrb_float_value(mrb, mt_rand_real(t)); - } - else { - value = mrb_fixnum_value(mt_rand(t) % mrb_fixnum(max)); - } - - return value; -} - -static mrb_value -get_opt(mrb_state* mrb) -{ - mrb_value arg; - - arg = mrb_nil_value(); - mrb_get_args(mrb, "|o", &arg); - - if (!mrb_nil_p(arg)) { - arg = mrb_check_convert_type(mrb, arg, MRB_TT_FIXNUM, "Fixnum", "to_int"); - if (mrb_nil_p(arg)) { - mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid argument type"); - } - if (mrb_fixnum(arg) < 0) { - arg = mrb_fixnum_value(0 - mrb_fixnum(arg)); - } - } - return arg; -} - -static mrb_value -get_random(mrb_state *mrb) { - return mrb_const_get(mrb, - mrb_obj_value(mrb_class_get(mrb, "Random")), - mrb_intern_lit(mrb, "DEFAULT")); -} - -static mt_state * -get_random_state(mrb_state *mrb) -{ - mrb_value random_val = get_random(mrb); - return DATA_GET_PTR(mrb, random_val, &mt_state_type, mt_state); -} - -static mrb_value -mrb_random_g_rand(mrb_state *mrb, mrb_value self) -{ - mrb_value random = get_random(mrb); - return mrb_random_rand(mrb, random); -} - -static mrb_value -mrb_random_g_srand(mrb_state *mrb, mrb_value self) -{ - mrb_value random = get_random(mrb); - return mrb_random_srand(mrb, random); -} - -static mrb_value -mrb_random_init(mrb_state *mrb, mrb_value self) -{ - mrb_value seed; - mt_state *t; - - seed = get_opt(mrb); - - /* avoid memory leaks */ - t = (mt_state*)DATA_PTR(self); - if (t) { - mrb_free(mrb, t); - } - mrb_data_init(self, NULL, &mt_state_type); - - t = (mt_state *)mrb_malloc(mrb, sizeof(mt_state)); - t->mti = N + 1; - - seed = mrb_random_mt_srand(mrb, t, seed); - if (mrb_nil_p(seed)) { - t->has_seed = FALSE; - } - else { - mrb_assert(mrb_fixnum_p(seed)); - t->has_seed = TRUE; - t->seed = mrb_fixnum(seed); - } - - mrb_data_init(self, t, &mt_state_type); - - return self; -} - -static void -mrb_random_rand_seed(mrb_state *mrb, mt_state *t) -{ - if (!t->has_seed) { - mrb_random_mt_srand(mrb, t, mrb_nil_value()); - } -} - -static mrb_value -mrb_random_rand(mrb_state *mrb, mrb_value self) -{ - mrb_value max; - mt_state *t = DATA_GET_PTR(mrb, self, &mt_state_type, mt_state); - - max = get_opt(mrb); - mrb_random_rand_seed(mrb, t); - return mrb_random_mt_rand(mrb, t, max); -} - -static mrb_value -mrb_random_srand(mrb_state *mrb, mrb_value self) -{ - mrb_value seed; - mrb_value old_seed; - mt_state *t = DATA_GET_PTR(mrb, self, &mt_state_type, mt_state); - - seed = get_opt(mrb); - seed = mrb_random_mt_srand(mrb, t, seed); - old_seed = t->has_seed? mrb_fixnum_value(t->seed) : mrb_nil_value(); - if (mrb_nil_p(seed)) { - t->has_seed = FALSE; - } - else { - mrb_assert(mrb_fixnum_p(seed)); - t->has_seed = TRUE; - t->seed = mrb_fixnum(seed); - } - - return old_seed; -} - -/* - * call-seq: - * ary.shuffle! -> ary - * - * Shuffles elements in self in place. - */ - -static mrb_value -mrb_ary_shuffle_bang(mrb_state *mrb, mrb_value ary) -{ - mrb_int i; - mt_state *random = NULL; - - if (RARRAY_LEN(ary) > 1) { - mrb_get_args(mrb, "|d", &random, &mt_state_type); - - if (random == NULL) { - random = get_random_state(mrb); - } - mrb_random_rand_seed(mrb, random); - - mrb_ary_modify(mrb, mrb_ary_ptr(ary)); - - for (i = RARRAY_LEN(ary) - 1; i > 0; i--) { - mrb_int j; - mrb_value *ptr = RARRAY_PTR(ary); - mrb_value tmp; - - - j = mrb_fixnum(mrb_random_mt_rand(mrb, random, mrb_fixnum_value(RARRAY_LEN(ary)))); - - tmp = ptr[i]; - ptr[i] = ptr[j]; - ptr[j] = tmp; - } - } - - return ary; -} - -/* - * call-seq: - * ary.shuffle -> new_ary - * - * Returns a new array with elements of self shuffled. - */ - -static mrb_value -mrb_ary_shuffle(mrb_state *mrb, mrb_value ary) -{ - mrb_value new_ary = mrb_ary_new_from_values(mrb, RARRAY_LEN(ary), RARRAY_PTR(ary)); - mrb_ary_shuffle_bang(mrb, new_ary); - - return new_ary; -} - -/* - * call-seq: - * ary.sample -> obj - * ary.sample(n) -> new_ary - * - * Choose a random element or +n+ random elements from the array. - * - * The elements are chosen by using random and unique indices into the array - * in order to ensure that an element doesn't repeat itself unless the array - * already contained duplicate elements. - * - * If the array is empty the first form returns +nil+ and the second form - * returns an empty array. - */ - -static mrb_value -mrb_ary_sample(mrb_state *mrb, mrb_value ary) -{ - mrb_int n = 0; - mrb_bool given; - mt_state *random = NULL; - mrb_int len; - - mrb_get_args(mrb, "|i?d", &n, &given, &random, &mt_state_type); - if (random == NULL) { - random = get_random_state(mrb); - } - mrb_random_rand_seed(mrb, random); - mt_rand(random); - len = RARRAY_LEN(ary); - if (!given) { /* pick one element */ - switch (len) { - case 0: - return mrb_nil_value(); - case 1: - return RARRAY_PTR(ary)[0]; - default: - return RARRAY_PTR(ary)[mt_rand(random) % len]; - } - } - else { - mrb_value result; - mrb_int i, j; - - if (n < 0) mrb_raise(mrb, E_ARGUMENT_ERROR, "negative sample number"); - if (n > len) n = len; - result = mrb_ary_new_capa(mrb, n); - for (i=0; i<n; i++) { - mrb_int r; - - for (;;) { - retry: - r = mt_rand(random) % len; - - for (j=0; j<i; j++) { - if (mrb_fixnum(RARRAY_PTR(result)[j]) == r) { - goto retry; /* retry if duplicate */ - } - } - break; - } - mrb_ary_push(mrb, result, mrb_fixnum_value(r)); - } - for (i=0; i<n; i++) { - mrb_ary_set(mrb, result, i, RARRAY_PTR(ary)[mrb_fixnum(RARRAY_PTR(result)[i])]); - } - return result; - } -} - - -void mrb_mruby_random_gem_init(mrb_state *mrb) -{ - struct RClass *random; - struct RClass *array = mrb->array_class; - - mrb_define_method(mrb, mrb->kernel_module, "rand", mrb_random_g_rand, MRB_ARGS_OPT(1)); - mrb_define_method(mrb, mrb->kernel_module, "srand", mrb_random_g_srand, MRB_ARGS_OPT(1)); - - random = mrb_define_class(mrb, "Random", mrb->object_class); - MRB_SET_INSTANCE_TT(random, MRB_TT_DATA); - mrb_define_class_method(mrb, random, "rand", mrb_random_g_rand, MRB_ARGS_OPT(1)); - mrb_define_class_method(mrb, random, "srand", mrb_random_g_srand, MRB_ARGS_OPT(1)); - - mrb_define_method(mrb, random, "initialize", mrb_random_init, MRB_ARGS_OPT(1)); - mrb_define_method(mrb, random, "rand", mrb_random_rand, MRB_ARGS_OPT(1)); - mrb_define_method(mrb, random, "srand", mrb_random_srand, MRB_ARGS_OPT(1)); - - mrb_define_method(mrb, array, "shuffle", mrb_ary_shuffle, MRB_ARGS_OPT(1)); - mrb_define_method(mrb, array, "shuffle!", mrb_ary_shuffle_bang, MRB_ARGS_OPT(1)); - mrb_define_method(mrb, array, "sample", mrb_ary_sample, MRB_ARGS_OPT(2)); - - mrb_const_set(mrb, mrb_obj_value(random), mrb_intern_lit(mrb, "DEFAULT"), - mrb_obj_new(mrb, random, 0, NULL)); -} - -void mrb_mruby_random_gem_final(mrb_state *mrb) -{ -} |