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util: ParseByteUnits - Parse a string with suffix unit [k|K|m|M|g|G|t|T]

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A convenience utility for human readable arguments/config e.g. -maxuploadtarget=500g
This commit is contained in:
Douglas Chimento
2021-11-17 12:47:30 +02:00
parent 94db963de5
commit 21b58f430f
6 changed files with 138 additions and 4 deletions
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48
src/test/util_tests.cpp
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@@ -2456,4 +2456,52 @@ BOOST_AUTO_TEST_CASE(remove_prefix)
BOOST_CHECK_EQUAL(RemovePrefix("", ""), "");
}
BOOST_AUTO_TEST_CASE(util_ParseByteUnits)
{
auto noop = ByteUnit::NOOP;
// no multiplier
BOOST_CHECK_EQUAL(ParseByteUnits("1", noop).value(), 1);
BOOST_CHECK_EQUAL(ParseByteUnits("0", noop).value(), 0);
BOOST_CHECK_EQUAL(ParseByteUnits("1k", noop).value(), 1000ULL);
BOOST_CHECK_EQUAL(ParseByteUnits("1K", noop).value(), 1ULL << 10);
BOOST_CHECK_EQUAL(ParseByteUnits("2m", noop).value(), 2'000'000ULL);
BOOST_CHECK_EQUAL(ParseByteUnits("2M", noop).value(), 2ULL << 20);
BOOST_CHECK_EQUAL(ParseByteUnits("3g", noop).value(), 3'000'000'000ULL);
BOOST_CHECK_EQUAL(ParseByteUnits("3G", noop).value(), 3ULL << 30);
BOOST_CHECK_EQUAL(ParseByteUnits("4t", noop).value(), 4'000'000'000'000ULL);
BOOST_CHECK_EQUAL(ParseByteUnits("4T", noop).value(), 4ULL << 40);
// check default multiplier
BOOST_CHECK_EQUAL(ParseByteUnits("5", ByteUnit::K).value(), 5ULL << 10);
// NaN
BOOST_CHECK(!ParseByteUnits("", noop));
BOOST_CHECK(!ParseByteUnits("foo", noop));
// whitespace
BOOST_CHECK(!ParseByteUnits("123m ", noop));
BOOST_CHECK(!ParseByteUnits(" 123m", noop));
// no +-
BOOST_CHECK(!ParseByteUnits("-123m", noop));
BOOST_CHECK(!ParseByteUnits("+123m", noop));
// zero padding
BOOST_CHECK_EQUAL(ParseByteUnits("020M", noop).value(), 20ULL << 20);
// fractions not allowed
BOOST_CHECK(!ParseByteUnits("0.5T", noop));
// overflow
BOOST_CHECK(!ParseByteUnits("18446744073709551615g", noop));
// invalid unit
BOOST_CHECK(!ParseByteUnits("1x", noop));
}
BOOST_AUTO_TEST_SUITE_END()