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This commit is contained in:
chenguoping 2020-05-15 17:35:43 +08:00
parent e175150f5b
commit 779a0ec7df
3 changed files with 61 additions and 3 deletions
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3
include/nlohmann/detail/output/binary_writer.hpp
View file

@ -194,7 +194,8 @@ class binary_writer
}
else
{
if (j.m_value.number_float < std::numeric_limits<float>::max() and
if (j.m_value.number_float > -std::numeric_limits<float>::min() and
j.m_value.number_float < std::numeric_limits<float>::max() and
static_cast<double>(static_cast<float>(j.m_value.number_float)) == j.m_value.number_float)
{
oa->write_character(get_cbor_float_prefix(static_cast<float>(j.m_value.number_float)));

3
single_include/nlohmann/json.hpp
View file

@ -12143,7 +12143,8 @@ class binary_writer
}
else
{
if (j.m_value.number_float < std::numeric_limits<float>::max() and
if (j.m_value.number_float > -std::numeric_limits<float>::min() and
j.m_value.number_float < std::numeric_limits<float>::max() and
static_cast<double>(static_cast<float>(j.m_value.number_float)) == j.m_value.number_float)
{
oa->write_character(get_cbor_float_prefix(static_cast<float>(j.m_value.number_float)));

58
test/src/unit-cbor.cpp
View file

@ -834,7 +834,7 @@ TEST_CASE("CBOR")
}
}
SECTION("float")
SECTION("double-precision float")
{
SECTION("3.1415925")
{
@ -853,6 +853,10 @@ TEST_CASE("CBOR")
CHECK(json::from_cbor(result, true, false) == j);
}
}
SECTION("single-precision float")
{
SECTION("0.5")
{
double v = 0.5;
@ -867,6 +871,58 @@ TEST_CASE("CBOR")
CHECK(json::from_cbor(result) == j);
CHECK(json::from_cbor(result) == v);
}
SECTION("0.0")
{
double v = 0.0;
json j = v;
// its double-precision binary value is:
// {0xfb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
std::vector<uint8_t> expected = {0xfa, 0x00, 0x00, 0x00, 0x00};
const auto result = json::to_cbor(j);
CHECK(result == expected);
// roundtrip
CHECK(json::from_cbor(result) == j);
CHECK(json::from_cbor(result) == v);
}
SECTION("-0.0")
{
double v = -0.0;
json j = v;
// its double-precision binary value is:
// {0xfb, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
std::vector<uint8_t> expected = {0xfa, 0x80, 0x00, 0x00, 0x00};
const auto result = json::to_cbor(j);
CHECK(result == expected);
// roundtrip
CHECK(json::from_cbor(result) == j);
CHECK(json::from_cbor(result) == v);
}
SECTION("100.0")
{
double v = 100.0;
json j = v;
// its double-precision binary value is:
// {0xfb, 0x40, 0x59, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
std::vector<uint8_t> expected = {0xfa, 0x42, 0xc8, 0x00, 0x00};
const auto result = json::to_cbor(j);
CHECK(result == expected);
// roundtrip
CHECK(json::from_cbor(result) == j);
CHECK(json::from_cbor(result) == v);
}
SECTION("200.0")
{
double v = 200.0;
json j = v;
// its double-precision binary value is:
// {0xfb, 0x40, 0x69, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
std::vector<uint8_t> expected = {0xfa, 0x43, 0x48, 0x00, 0x00};
const auto result = json::to_cbor(j);
CHECK(result == expected);
// roundtrip
CHECK(json::from_cbor(result) == j);
CHECK(json::from_cbor(result) == v);
}
}
SECTION("half-precision float (edge cases)")