mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
31 lines
700 B
C
31 lines
700 B
C
/*
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** enum.c - Enumerable module
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**
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** See Copyright Notice in mruby.h
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*/
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#include <mruby.h>
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#include <mruby/proc.h>
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#include <mruby/presym.h>
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/* internal method `__update_hash(oldhash, index, itemhash)` */
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static mrb_value
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enum_update_hash(mrb_state *mrb, mrb_value self)
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{
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mrb_int hash;
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mrb_int index;
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mrb_int hv;
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mrb_get_args(mrb, "iii", &hash, &index, &hv);
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hash ^= ((uint32_t)hv << (index % 16));
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return mrb_int_value(mrb, hash);
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}
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void
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mrb_init_enumerable(mrb_state *mrb)
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{
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struct RClass *enumerable = mrb_define_module_id(mrb, MRB_SYM(Enumerable)); /* 15.3.2 */
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mrb_define_module_function_id(mrb, enumerable, MRB_SYM(__update_hash), enum_update_hash, MRB_ARGS_REQ(3));
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}
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