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🐛 fix bug in SAX callback parser

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This commit is contained in:
Niels Lohmann 2020-05-08 14:21:11 +02:00
parent cf4a6552f3
commit f0c6ab4d3b
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GPG Key ID: 7F3CEA63AE251B69
5 changed files with 58 additions and 66 deletions
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34
include/nlohmann/detail/input/json_sax.hpp
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@ -214,7 +214,7 @@ class json_sax_dom_parser
bool binary(binary_t& val)
{
handle_binary(val);
handle_value(BasicJsonType::binary_array(std::move(val)));
return true;
}
@ -327,36 +327,6 @@ class json_sax_dom_parser
return object_element;
}
/*!
@invariant If the ref stack is empty, then the passed value will be the new
root.
@invariant If the ref stack contains a value, then it is an array or an
object to which we can add elements
*/
template<typename BinaryValue>
JSON_HEDLEY_RETURNS_NON_NULL
BasicJsonType* handle_binary(BinaryValue&& v)
{
if (ref_stack.empty())
{
root = BasicJsonType::binary_array(std::forward<BinaryValue>(v));
return &root;
}
assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
if (ref_stack.back()->is_array())
{
ref_stack.back()->m_value.array->emplace_back(BasicJsonType::binary_array(std::forward<BinaryValue>(v)));
return &(ref_stack.back()->m_value.array->back());
}
assert(ref_stack.back()->is_object());
assert(object_element);
*object_element = BasicJsonType::binary_array(std::forward<BinaryValue>(v));
return object_element;
}
/// the parsed JSON value
BasicJsonType& root;
/// stack to model hierarchy of values
@ -434,7 +404,7 @@ class json_sax_dom_callback_parser
bool binary(binary_t& val)
{
handle_value(val);
handle_value(BasicJsonType::binary_array(val));
return true;
}

2
include/nlohmann/json.hpp
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@ -2794,7 +2794,7 @@ class basic_json
/// get a pointer to the value (binary)
binary_t* get_impl_ptr(binary_t* /*unused*/) noexcept
{
return is_binary() ? m_value.binary : nullptr;
return is_binary() ? reinterpret_cast<binary_t*>(m_value.binary) : nullptr;
}
/// get a pointer to the value (binary)

36
single_include/nlohmann/json.hpp
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@ -4881,7 +4881,7 @@ class json_sax_dom_parser
bool binary(binary_t& val)
{
handle_binary(val);
handle_value(BasicJsonType::binary_array(std::move(val)));
return true;
}
@ -4994,36 +4994,6 @@ class json_sax_dom_parser
return object_element;
}
/*!
@invariant If the ref stack is empty, then the passed value will be the new
root.
@invariant If the ref stack contains a value, then it is an array or an
object to which we can add elements
*/
template<typename BinaryValue>
JSON_HEDLEY_RETURNS_NON_NULL
BasicJsonType* handle_binary(BinaryValue&& v)
{
if (ref_stack.empty())
{
root = BasicJsonType::binary_array(std::forward<BinaryValue>(v));
return &root;
}
assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
if (ref_stack.back()->is_array())
{
ref_stack.back()->m_value.array->emplace_back(BasicJsonType::binary_array(std::forward<BinaryValue>(v)));
return &(ref_stack.back()->m_value.array->back());
}
assert(ref_stack.back()->is_object());
assert(object_element);
*object_element = BasicJsonType::binary_array(std::forward<BinaryValue>(v));
return object_element;
}
/// the parsed JSON value
BasicJsonType& root;
/// stack to model hierarchy of values
@ -5101,7 +5071,7 @@ class json_sax_dom_callback_parser
bool binary(binary_t& val)
{
handle_value(val);
handle_value(BasicJsonType::binary_array(val));
return true;
}
@ -18280,7 +18250,7 @@ class basic_json
/// get a pointer to the value (binary)
binary_t* get_impl_ptr(binary_t* /*unused*/) noexcept
{
return is_binary() ? m_value.binary : nullptr;
return is_binary() ? reinterpret_cast<binary_t*>(m_value.binary) : nullptr;
}
/// get a pointer to the value (binary)

23
test/src/unit-cbor.cpp
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@ -1442,6 +1442,29 @@ TEST_CASE("CBOR")
std::vector<std::uint8_t> input = {0xA1, 0x63, 0x66, 0x6F, 0x6F, 0x40};
CHECK_NOTHROW(json::from_cbor(input));
}
SECTION("SAX callback with binary")
{
// object mapping "foo" to byte string
std::vector<std::uint8_t> input = {0xA1, 0x63, 0x66, 0x6F, 0x6F, 0x41, 0x00};
// callback to set binary_seen to true if a binary value was seen
bool binary_seen = false;
auto callback = [&binary_seen](int /*depth*/, json::parse_event_t /*event*/, json & parsed)
{
if (parsed.is_binary())
{
binary_seen = true;
}
return true;
};
json j;
auto cbp = nlohmann::detail::json_sax_dom_callback_parser<json>(j, callback, true);
CHECK(json::sax_parse(input, &cbp, json::input_format_t::cbor));
CHECK(j.at("foo").is_binary());
CHECK(binary_seen);
}
}
}

29
test/src/unit-pointer_access.cpp
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@ -442,4 +442,33 @@ TEST_CASE("pointer access")
CHECK(value.get_ptr<const json::number_float_t*>() != nullptr);
CHECK(value.get_ptr<const json::binary_t*>() == nullptr);
}
SECTION("pointer access to const binary_t")
{
using test_type = const json::binary_t;
const json value = json::binary_array({});
// check if pointers are returned correctly
test_type* p1 = value.get_ptr<test_type*>();
CHECK(p1 == value.get_ptr<test_type*>());
//CHECK(*p1 == value.get<test_type>());
const test_type* p2 = value.get_ptr<const test_type*>();
CHECK(p2 == value.get_ptr<const test_type*>());
//CHECK(*p2 == value.get<test_type>());
const test_type* const p3 = value.get_ptr<const test_type* const>();
CHECK(p3 == value.get_ptr<const test_type* const>());
//CHECK(*p3 == value.get<test_type>());
// check if null pointers are returned correctly
CHECK(value.get_ptr<const json::object_t*>() == nullptr);
CHECK(value.get_ptr<const json::array_t*>() == nullptr);
CHECK(value.get_ptr<const json::string_t*>() == nullptr);
CHECK(value.get_ptr<const json::boolean_t*>() == nullptr);
CHECK(value.get_ptr<const json::number_integer_t*>() == nullptr);
CHECK(value.get_ptr<const json::number_unsigned_t*>() == nullptr);
CHECK(value.get_ptr<const json::number_float_t*>() == nullptr);
CHECK(value.get_ptr<const json::binary_t*>() != nullptr);
}
}