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[ruby/bigdecimal] Fix trailing zero handling in rb_uint64_convert_to_BigDecimal

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2056604d56
This commit is contained in:
Kenta Murata 2021-01-06 18:17:35 +09:00
parent 698d7947c3
commit 82f6085b3e
2 changed files with 8 additions and 1 deletions
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5
ext/bigdecimal/bigdecimal.c
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@ -2736,12 +2736,15 @@ rb_uint64_convert_to_BigDecimal(uint64_t uval, RB_UNUSED_VAR(size_t digs), int r
vp->exponent = len;
VpSetSign(vp, 1);
size_t i;
size_t i, ntz = 0;
for (i = 0; i < len; ++i) {
DECDIG r = uval % BASE;
vp->frac[len - i - 1] = r;
if (r == 0) ++ntz;
uval /= BASE;
}
vp->Prec -= ntz;
}
return BigDecimal_wrap_struct(obj, vp);

4
test/bigdecimal/test_bigdecimal.rb
View file

@ -1951,6 +1951,10 @@ class TestBigDecimal < Test::Unit::TestCase
assert_equal(1, BigDecimal(-1).precision)
assert_equal(2, BigDecimal(10).precision)
assert_equal(2, BigDecimal(-10).precision)
assert_equal(9, BigDecimal(100_000_000).precision)
assert_equal(9, BigDecimal(-100_000_000).precision)
assert_equal(12, BigDecimal(100_000_000_000).precision)
assert_equal(12, BigDecimal(-100_000_000_000).precision)
assert_equal(21, BigDecimal(100_000_000_000_000_000_000).precision)
assert_equal(21, BigDecimal(-100_000_000_000_000_000_000).precision)
assert_equal(103, BigDecimal("111e100").precision)