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complex.c (complex_hash): generate hash code from complex numbers.

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Yukihiro "Matz" Matsumoto
2022-08-05 09:14:45 +09:00
parent a7c3d59971
commit 25f9d2f65a
1 changed files with 10 additions and 0 deletions
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mrbgems/mruby-complex/src/complex.c
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@@ -372,6 +372,15 @@ complex_div(mrb_state *mrb, mrb_value x)
return mrb_complex_div(mrb, x, y);
}
static mrb_value
complex_hash(mrb_state *mrb, mrb_value cpx)
{
struct mrb_complex *c = complex_ptr(mrb, cpx);
uint32_t hash = mrb_byte_hash((uint8_t*)&c->real, sizeof(mrb_float));
hash = mrb_byte_hash_step((uint8_t*)&c->imaginary, sizeof(mrb_float), hash);
return mrb_int_value(mrb, hash);
}
void mrb_mruby_complex_gem_init(mrb_state *mrb)
{
struct RClass *comp;
@@ -394,6 +403,7 @@ void mrb_mruby_complex_gem_init(mrb_state *mrb)
mrb_define_method(mrb, comp, "/", complex_div, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "quo", complex_div, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "==", complex_eq, MRB_ARGS_REQ(1));
mrb_define_method(mrb, comp, "hash", complex_hash, MRB_ARGS_NONE());
}
void