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Implement multiplication and part of assignment from pow of 10

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This commit is contained in:
Victor Zverovich
2019-09-08 08:09:24 -07:00
parent 0887887e23
commit b3bf665764
2 changed files with 65 additions and 4 deletions
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15
test/format-impl-test.cc
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@@ -29,6 +29,7 @@ static_assert(!std::is_copy_constructible<bigint>::value, "");
static_assert(!std::is_copy_assignable<bigint>::value, "");
TEST(BigIntTest, Construct) {
EXPECT_EQ("", fmt::format("{}", bigint()));
EXPECT_EQ("42", fmt::format("{}", bigint(0x42)));
EXPECT_EQ("123456789abcedf0", fmt::format("{}", bigint(0x123456789abcedf0)));
}
@@ -43,6 +44,20 @@ TEST(BigIntTest, ShiftLeft) {
EXPECT_EQ("108000000", fmt::format("{}", n));
}
TEST(BigIntTest, Multiply) {
bigint n(0x42);
n *= 1;
EXPECT_EQ("42", fmt::format("{}", n));
n *= 2;
EXPECT_EQ("84", fmt::format("{}", n));
n *= 0x12345678;
EXPECT_EQ("962fc95e0", fmt::format("{}", n));
auto max = (std::numeric_limits<uint32_t>::max)();
bigint bigmax(max);
bigmax *= max;
EXPECT_EQ("fffffffe00000001", fmt::format("{}", bigmax));
}
template <bool is_iec559> void test_construct_from_double() {
fmt::print("warning: double is not IEC559, skipping FP tests\n");
}