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numeric_ext.c: update Integer#remainder method.

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- need to detect zero division error
- support floating point number argument (as `%`)
This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-08-03 16:28:11 +09:00
parent b70fd09f47
commit f4afcbef67
1 changed files with 24 additions and 5 deletions
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mrbgems/mruby-numeric-ext/src/numeric_ext.c
+24 -5
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@@ -50,6 +50,12 @@ int_nobits(mrb_state *mrb, mrb_value self)
return mrb_bool_value((n & m) == 0);
}
static void
zerodiv(mrb_state *mrb)
{
mrb_raise(mrb, E_ZERODIV_ERROR, "divided by 0");
}
/*
* call-seq:
* num.remainder(numeric) -> real
@@ -59,13 +65,26 @@ int_nobits(mrb_state *mrb, mrb_value self)
* See Numeric#divmod.
*/
static mrb_value
int_remainder(mrb_state *mrb, mrb_value self)
int_remainder(mrb_state *mrb, mrb_value x)
{
mrb_int n, m;
mrb_value y = mrb_get_arg1(mrb);
mrb_int a, b;
mrb_get_args(mrb, "i", &m);
n = mrb_integer(self);
return mrb_int_value(mrb, n % m);
a = mrb_integer(x);
if (mrb_integer_p(y) && a != MRB_INT_MIN && (b=mrb_integer(y)) != MRB_INT_MIN) {
if (b == 0) zerodiv(mrb);
return mrb_int_value(mrb, a % b);
}
#ifdef MRB_NO_FLOAT
mrb_raise(mrb, E_TYPE_ERROR, "non integer remainder");
#else
else {
mrb_float n = (mrb_float)a;
mrb_float m = mrb_as_float(mrb, y);
return mrb_float_value(mrb, n-m*trunc(n/m));
}
#endif
}
void