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Handle correctly #reminder with infinity. Fixes #187 #243

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Merged
merged 1 commit into from
Feb 17, 2023
Merged

Handle correctly #reminder with infinity. Fixes #187 #243

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7 changes: 7 additions & 0 deletions ext/bigdecimal/bigdecimal.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2082,6 +2082,13 @@ BigDecimal_divremain(VALUE self, VALUE r, Real **dv, Real **rv)
if (!b) return DoSomeOne(self, r, rb_intern("remainder"));
SAVE(b);

if (VpIsPosInf(b) || VpIsNegInf(b)) {
GUARD_OBJ(*dv, NewZeroWrapLimited(1, 1));
VpSetZero(*dv, 1);
*rv = a;
return Qnil;
}

mx = (a->MaxPrec + b->MaxPrec) *VpBaseFig();
GUARD_OBJ(c, NewZeroWrapLimited(1, mx));
GUARD_OBJ(res, NewZeroWrapNolimit(1, (mx+1) * 2 + (VpBaseFig() + 1)));
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11 changes: 11 additions & 0 deletions test/bigdecimal/test_bigdecimal.rb
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Expand Up @@ -2256,6 +2256,17 @@ def test_llong_min_gh_200
assert_equal(BigDecimal(minus_ullong_max.to_s), BigDecimal(minus_ullong_max), "[GH-200]")
end

def test_reminder_infinity_gh_187
# https://github.com/ruby/bigdecimal/issues/187
BigDecimal.save_exception_mode do
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
bd = BigDecimal("4.2")
assert_equal(bd.remainder(BigDecimal("+Infinity")), bd)
assert_equal(bd.remainder(BigDecimal("-Infinity")), bd)
end
end

def assert_no_memory_leak(code, *rest, **opt)
code = "8.times {20_000.times {begin #{code}; rescue NoMemoryError; end}; GC.start}"
super(["-rbigdecimal"],
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