From f06c8fd8e310ad57087142d395ec1ea5523e2c49 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Fri, 14 Sep 2018 22:58:22 +0200 Subject: [PATCH 01/28] BSON: serialization of non-objects is not supported --- include/nlohmann/detail/exceptions.hpp | 1 + .../nlohmann/detail/input/binary_reader.hpp | 28 ++++ .../nlohmann/detail/input/input_adapters.hpp | 2 +- .../nlohmann/detail/output/binary_writer.hpp | 55 +++++++ include/nlohmann/json.hpp | 48 +++++++ single_include/nlohmann/json.hpp | 134 +++++++++++++++++- test/src/unit-bson.cpp | 70 +++++++++ 7 files changed, 336 insertions(+), 2 deletions(-) create mode 100644 test/src/unit-bson.cpp diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp index b73d7b1f94..274a88c7fe 100644 --- a/include/nlohmann/detail/exceptions.hpp +++ b/include/nlohmann/detail/exceptions.hpp @@ -220,6 +220,7 @@ json.exception.type_error.313 | invalid value to unflatten | The @ref unflatten json.exception.type_error.314 | only objects can be unflattened | The @ref unflatten function only works for an object whose keys are JSON Pointers. json.exception.type_error.315 | values in object must be primitive | The @ref unflatten function only works for an object whose keys are JSON Pointers and whose values are primitive. json.exception.type_error.316 | invalid UTF-8 byte at index 10: 0x7E | The @ref dump function only works with UTF-8 encoded strings; that is, if you assign a `std::string` to a JSON value, make sure it is UTF-8 encoded. | +json.exception.type_error.317 | JSON value cannot be serialized to requested format | The dynamic type of the object cannot be represented in the requested serialization format (e.g. a raw `true` or `null` JSON object cannot be serialized to BSON) | @liveexample{The following code shows how a `type_error` exception can be caught.,type_error} diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 05ab36f39c..9f684273d4 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -80,6 +80,10 @@ class binary_reader result = parse_ubjson_internal(); break; + case input_format_t::bson: + result = parse_bson_internal(); + break; + // LCOV_EXCL_START default: assert(false); @@ -120,6 +124,30 @@ class binary_reader } private: + + bool parse_bson_internal() + { + int docLen = 0; + int byte; + for (int i = 0; i < 4; ++i) + { + byte = get(); + if (JSON_UNLIKELY(current == std::char_traits::eof())) + { + if (i == 1) + { + return sax->boolean(docLen != 0x00); + } + return false; + } + docLen |= static_cast(byte) << 8 * i; + } + + //sax->null(); + get(); + return true; + } + /*! @param[in] get_char whether a new character should be retrieved from the input (true, default) or whether the last read diff --git a/include/nlohmann/detail/input/input_adapters.hpp b/include/nlohmann/detail/input/input_adapters.hpp index c2a20ab7db..a877984e96 100644 --- a/include/nlohmann/detail/input/input_adapters.hpp +++ b/include/nlohmann/detail/input/input_adapters.hpp @@ -18,7 +18,7 @@ namespace nlohmann namespace detail { /// the supported input formats -enum class input_format_t { json, cbor, msgpack, ubjson }; +enum class input_format_t { json, cbor, msgpack, ubjson, bson }; //////////////////// // input adapters // diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 71e5ec81e4..f58213f5ff 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -676,6 +676,37 @@ class binary_writer } } + + /*! + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + void write_bson_object(const BasicJsonType& j) + { + assert(j.type() == value_t::object); + + } + + /*! + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + void write_bson(const BasicJsonType& j) + { + switch (j.type()) + { + default: + JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + break; + case value_t::discarded: + break; + case value_t::object: + write_bson_object(j); + break; + } + } + + private: /* @brief write a number to output input @@ -704,6 +735,30 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } + /* + @brief write a number to output in little endian format + + @param[in] n number of type @a NumberType + @tparam NumberType the type of the number + */ + template + void write_number_little_endian(const NumberType n) + { + // step 1: write number to array of length NumberType + std::array vec; + std::memcpy(vec.data(), &n, sizeof(NumberType)); + + // step 2: write array to output (with possible reordering) + if (!is_little_endian) + { + // reverse byte order prior to conversion if necessary + std::reverse(vec.begin(), vec.end()); + } + + oa->write_characters(vec.data(), sizeof(NumberType)); + } + + // UBJSON: write number (floating point) template::value, int>::type = 0> diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp index ee78c1c160..8b6a017072 100644 --- a/include/nlohmann/json.hpp +++ b/include/nlohmann/json.hpp @@ -6590,6 +6590,26 @@ class basic_json binary_writer(o).write_ubjson(j, use_size, use_type); } + + + static std::vector to_bson(const basic_json& j) + { + std::vector result; + to_bson(j, result); + return result; + } + + static void to_bson(const basic_json& j, detail::output_adapter o) + { + binary_writer(o).write_bson(j); + } + + static void to_bson(const basic_json& j, detail::output_adapter o) + { + binary_writer(o).write_bson(j); + } + + /*! @brief create a JSON value from an input in CBOR format @@ -6897,6 +6917,34 @@ class basic_json return res ? result : basic_json(value_t::discarded); } + + + + + static basic_json from_bson(detail::input_adapter&& i, + const bool strict = true, + const bool allow_exceptions = true) + { + basic_json result; + detail::json_sax_dom_parser sdp(result, allow_exceptions); + const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::bson, &sdp, strict); + return res ? result : basic_json(value_t::discarded); + } + + template::value, int> = 0> + static basic_json from_bson(A1 && a1, A2 && a2, + const bool strict = true, + const bool allow_exceptions = true) + { + basic_json result; + detail::json_sax_dom_parser sdp(result, allow_exceptions); + const bool res = binary_reader(detail::input_adapter(std::forward(a1), std::forward(a2))).sax_parse(input_format_t::bson, &sdp, strict); + return res ? result : basic_json(value_t::discarded); + } + + + /// @} ////////////////////////// diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 69e4bddcf3..606a357465 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -819,6 +819,7 @@ json.exception.type_error.313 | invalid value to unflatten | The @ref unflatten json.exception.type_error.314 | only objects can be unflattened | The @ref unflatten function only works for an object whose keys are JSON Pointers. json.exception.type_error.315 | values in object must be primitive | The @ref unflatten function only works for an object whose keys are JSON Pointers and whose values are primitive. json.exception.type_error.316 | invalid UTF-8 byte at index 10: 0x7E | The @ref dump function only works with UTF-8 encoded strings; that is, if you assign a `std::string` to a JSON value, make sure it is UTF-8 encoded. | +json.exception.type_error.317 | JSON value cannot be serialized to requested format | The dynamic type of the object cannot be represented in the requested serialization format (e.g. a raw `true` or `null` JSON object cannot be serialized to BSON) | @liveexample{The following code shows how a `type_error` exception can be caught.,type_error} @@ -1882,7 +1883,7 @@ namespace nlohmann namespace detail { /// the supported input formats -enum class input_format_t { json, cbor, msgpack, ubjson }; +enum class input_format_t { json, cbor, msgpack, ubjson, bson }; //////////////////// // input adapters // @@ -6020,6 +6021,10 @@ class binary_reader result = parse_ubjson_internal(); break; + case input_format_t::bson: + result = parse_bson_internal(); + break; + // LCOV_EXCL_START default: assert(false); @@ -6060,6 +6065,30 @@ class binary_reader } private: + + bool parse_bson_internal() + { + int docLen = 0; + int byte; + for (int i = 0; i < 4; ++i) + { + byte = get(); + if (JSON_UNLIKELY(current == std::char_traits::eof())) + { + if (i == 1) + { + return sax->boolean(docLen != 0x00); + } + return false; + } + docLen |= static_cast(byte) << 8 * i; + } + + //sax->null(); + get(); + return true; + } + /*! @param[in] get_char whether a new character should be retrieved from the input (true, default) or whether the last read @@ -8317,6 +8346,37 @@ class binary_writer } } + + /*! + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + void write_bson_object(const BasicJsonType& j) + { + assert(j.type() == value_t::object); + + } + + /*! + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + void write_bson(const BasicJsonType& j) + { + switch (j.type()) + { + default: + JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + break; + case value_t::discarded: + break; + case value_t::object: + write_bson_object(j); + break; + } + } + + private: /* @brief write a number to output input @@ -8345,6 +8405,30 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } + /* + @brief write a number to output in little endian format + + @param[in] n number of type @a NumberType + @tparam NumberType the type of the number + */ + template + void write_number_little_endian(const NumberType n) + { + // step 1: write number to array of length NumberType + std::array vec; + std::memcpy(vec.data(), &n, sizeof(NumberType)); + + // step 2: write array to output (with possible reordering) + if (!is_little_endian) + { + // reverse byte order prior to conversion if necessary + std::reverse(vec.begin(), vec.end()); + } + + oa->write_characters(vec.data(), sizeof(NumberType)); + } + + // UBJSON: write number (floating point) template::value, int>::type = 0> @@ -17663,6 +17747,26 @@ class basic_json binary_writer(o).write_ubjson(j, use_size, use_type); } + + + static std::vector to_bson(const basic_json& j) + { + std::vector result; + to_bson(j, result); + return result; + } + + static void to_bson(const basic_json& j, detail::output_adapter o) + { + binary_writer(o).write_bson(j); + } + + static void to_bson(const basic_json& j, detail::output_adapter o) + { + binary_writer(o).write_bson(j); + } + + /*! @brief create a JSON value from an input in CBOR format @@ -17970,6 +18074,34 @@ class basic_json return res ? result : basic_json(value_t::discarded); } + + + + + static basic_json from_bson(detail::input_adapter&& i, + const bool strict = true, + const bool allow_exceptions = true) + { + basic_json result; + detail::json_sax_dom_parser sdp(result, allow_exceptions); + const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::bson, &sdp, strict); + return res ? result : basic_json(value_t::discarded); + } + + template::value, int> = 0> + static basic_json from_bson(A1 && a1, A2 && a2, + const bool strict = true, + const bool allow_exceptions = true) + { + basic_json result; + detail::json_sax_dom_parser sdp(result, allow_exceptions); + const bool res = binary_reader(detail::input_adapter(std::forward(a1), std::forward(a2))).sax_parse(input_format_t::bson, &sdp, strict); + return res ? result : basic_json(value_t::discarded); + } + + + /// @} ////////////////////////// diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp new file mode 100644 index 0000000000..4e17f23395 --- /dev/null +++ b/test/src/unit-bson.cpp @@ -0,0 +1,70 @@ +/* + __ _____ _____ _____ + __| | __| | | | JSON for Modern C++ (test suite) +| | |__ | | | | | | version 3.2.0 +|_____|_____|_____|_|___| https://github.com/nlohmann/json + +Licensed under the MIT License . +SPDX-License-Identifier: MIT +Copyright (c) 2013-2018 Niels Lohmann . + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +*/ + +#include "catch.hpp" + +#include +using nlohmann::json; + +#include + +TEST_CASE("BSON") +{ + SECTION("individual values") + { + SECTION("discarded") + { + // discarded values are not serialized + json j = json::value_t::discarded; + const auto result = json::to_bson(j); + CHECK(result.empty()); + } + + SECTION("null") + { + json j = nullptr; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + + SECTION("boolean") + { + SECTION("true") + { + json j = true; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + + SECTION("false") + { + json j = false; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + } + } +} From 5f5836ce1c7a2fc10a85bab058cf1dd0bc23d9a8 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 00:43:39 +0200 Subject: [PATCH 02/28] BSON: Support empty objects --- .../nlohmann/detail/input/binary_reader.hpp | 52 +++++++++++++----- .../nlohmann/detail/output/binary_writer.hpp | 3 +- single_include/nlohmann/json.hpp | 55 +++++++++++++------ test/src/unit-bson.cpp | 47 +++++++++++++++- 4 files changed, 124 insertions(+), 33 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 9f684273d4..9b00cc49f3 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -127,25 +127,18 @@ class binary_reader bool parse_bson_internal() { - int docLen = 0; - int byte; - for (int i = 0; i < 4; ++i) + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_object(documentSize - 5))) { - byte = get(); - if (JSON_UNLIKELY(current == std::char_traits::eof())) - { - if (i == 1) - { - return sax->boolean(docLen != 0x00); - } - return false; - } - docLen |= static_cast(byte) << 8 * i; + return false; } - //sax->null(); + const auto result = sax->end_object(); + get(); - return true; + return result; } /*! @@ -927,6 +920,35 @@ class binary_reader return true; } + template + bool get_number_little_endian(NumberType& result) + { + // step 1: read input into array with system's byte order + std::array vec; + for (std::size_t i = 0; i < sizeof(NumberType); ++i) + { + get(); + if (JSON_UNLIKELY(not unexpect_eof())) + { + return false; + } + + // reverse byte order prior to conversion if necessary + if (!is_little_endian) + { + vec[sizeof(NumberType) - i - 1] = static_cast(current); + } + else + { + vec[i] = static_cast(current); // LCOV_EXCL_LINE + } + } + + // step 2: convert array into number of type T and return + std::memcpy(&result, vec.data(), sizeof(NumberType)); + return true; + } + /*! @brief create a string by reading characters from the input diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index f58213f5ff..4b9a13437f 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -684,7 +684,8 @@ class binary_writer void write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); - + write_number_little_endian(5); + oa->write_character(static_cast(0x00)); } /*! diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 606a357465..a68c64a91c 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6068,25 +6068,18 @@ class binary_reader bool parse_bson_internal() { - int docLen = 0; - int byte; - for (int i = 0; i < 4; ++i) + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_object(documentSize - 5))) { - byte = get(); - if (JSON_UNLIKELY(current == std::char_traits::eof())) - { - if (i == 1) - { - return sax->boolean(docLen != 0x00); - } - return false; - } - docLen |= static_cast(byte) << 8 * i; + return false; } - //sax->null(); + const auto result = sax->end_object(); + get(); - return true; + return result; } /*! @@ -6868,6 +6861,35 @@ class binary_reader return true; } + template + bool get_number_little_endian(NumberType& result) + { + // step 1: read input into array with system's byte order + std::array vec; + for (std::size_t i = 0; i < sizeof(NumberType); ++i) + { + get(); + if (JSON_UNLIKELY(not unexpect_eof())) + { + return false; + } + + // reverse byte order prior to conversion if necessary + if (!is_little_endian) + { + vec[sizeof(NumberType) - i - 1] = static_cast(current); + } + else + { + vec[i] = static_cast(current); // LCOV_EXCL_LINE + } + } + + // step 2: convert array into number of type T and return + std::memcpy(&result, vec.data(), sizeof(NumberType)); + return true; + } + /*! @brief create a string by reading characters from the input @@ -8354,7 +8376,8 @@ class binary_writer void write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); - + write_number_little_endian(5); + oa->write_character(static_cast(0x00)); } /*! diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 4e17f23395..78a3013991 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -36,7 +36,7 @@ using nlohmann::json; TEST_CASE("BSON") { - SECTION("individual values") + SECTION("individual values not supported") { SECTION("discarded") { @@ -66,5 +66,50 @@ TEST_CASE("BSON") REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); } } + + SECTION("number") + { + json j = 42; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + + SECTION("float") + { + json j = 4.2; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + + SECTION("string") + { + json j = "not supported"; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + + SECTION("array") + { + json j = std::vector {1, 2, 3, 4, 5, 6, 7}; + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + } + } + + SECTION("objects") + { + SECTION("empty object") + { + json j = json::object(); + std::vector expected = + { + 0x05, 0x00, 0x00, 0x00, // size (little endian) + // no entries + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From 9a0dddc5d2536d6d1960a2fb89027e3849794306 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 03:08:50 +0200 Subject: [PATCH 03/28] BSON: Object with single boolean --- .../nlohmann/detail/input/binary_reader.hpp | 60 +++++++- .../nlohmann/detail/output/binary_writer.hpp | 44 +++++- .../detail/output/output_adapters.hpp | 43 ++++++ single_include/nlohmann/json.hpp | 141 +++++++++++++++++- test/src/unit-bson.cpp | 48 ++++++ 5 files changed, 330 insertions(+), 6 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 9b00cc49f3..54833cc309 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -125,19 +125,75 @@ class binary_reader private: + template + OutputIt generate_until(OutputIt&& d_first, UnaryPredicate&& pred, Gen&& gen) + { + for (auto x = gen(); !pred(x); x = gen()) + { + *d_first++ = x; + } + + return d_first; + } + + /*! + @param[in] len the length of the array or std::size_t(-1) for an + array of indefinite size + @return whether array creation completed + */ + bool get_bson_str(string_t& result) + { + bool success = true; + generate_until(std::back_inserter(result), [](char c) + { + return c == 0x00; + }, [this, &success] + { + get(); + if (JSON_UNLIKELY(unexpect_eof())) + { + success = false; + } + return static_cast(current); + }); + return success; + } + + bool parse_bson_internal() { std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_object(documentSize - 5))) + if (not JSON_UNLIKELY(sax->start_object(-1))) { return false; } - const auto result = sax->end_object(); + while (auto entry_type = get()) + { + switch (entry_type) + { + case 0x01: + { + string_t key; + get_bson_str(key); + sax->key(key); + sax->boolean(static_cast(get())); + } break; + case 0x08: + { + string_t key; + get_bson_str(key); + sax->key(key); + sax->boolean(static_cast(get())); + } break; + } + } get(); + const auto result = sax->end_object(); + return result; } diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 4b9a13437f..98e6104bc4 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -677,6 +677,16 @@ class binary_writer } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x08)); // boolean + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + oa->write_character(j.m_value.boolean ? static_cast(0x01) : static_cast(0x00)); + return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; + } + /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object @@ -684,8 +694,16 @@ class binary_writer void write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); - write_number_little_endian(5); + auto document_size_offset = oa->reserve_characters(4ul); + std::int32_t document_size = 5ul; + + for (const auto& el : *j.m_value.object) + { + document_size += write_bson_object_entry(el.first, el.second); + } + oa->write_character(static_cast(0x00)); + write_number_little_endian_at(document_size_offset, document_size); } /*! @@ -759,6 +777,30 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } + /* + @brief write a number to output in little endian format + + @param[in] offset The offset where to start writing + @param[in] n number of type @a NumberType + @tparam NumberType the type of the number + */ + template + void write_number_little_endian_at(std::size_t offset, const NumberType n) + { + // step 1: write number to array of length NumberType + std::array vec; + std::memcpy(vec.data(), &n, sizeof(NumberType)); + + // step 2: write array to output (with possible reordering) + if (!is_little_endian) + { + // reverse byte order prior to conversion if necessary + std::reverse(vec.begin(), vec.end()); + } + + oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); + } + // UBJSON: write number (floating point) template struct output_adapter_protocol { virtual void write_character(CharType c) = 0; virtual void write_characters(const CharType* s, std::size_t length) = 0; + virtual void write_characters_at(std::size_t position, const CharType* s, std::size_t length) = 0; + virtual std::size_t reserve_characters(std::size_t length) = 0; virtual ~output_adapter_protocol() = default; }; @@ -42,6 +44,18 @@ class output_vector_adapter : public output_adapter_protocol std::copy(s, s + length, std::back_inserter(v)); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + std::copy(s, s + length, std::begin(v) + position); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = v.size(); + std::fill_n(std::back_inserter(v), length, static_cast(0x00)); + return position; + } + private: std::vector& v; }; @@ -63,6 +77,22 @@ class output_stream_adapter : public output_adapter_protocol stream.write(s, static_cast(length)); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + const auto orig_offset = stream.tellp(); + stream.seekp(static_cast::pos_type>(position)); + stream.write(s, static_cast(length)); + stream.seekp(orig_offset); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = stream.tellp(); + std::vector empty(length, static_cast(0)); + stream.write(empty.data(), length); + return static_cast(position); + } + private: std::basic_ostream& stream; }; @@ -84,6 +114,19 @@ class output_string_adapter : public output_adapter_protocol str.append(s, length); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + std::copy(s, s + length, std::begin(str) + position); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = str.size(); + std::fill_n(std::back_inserter(str), length, static_cast(0x00)); + return position; + } + + private: StringType& str; }; diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index a68c64a91c..6b81d35482 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -5838,6 +5838,8 @@ template struct output_adapter_protocol { virtual void write_character(CharType c) = 0; virtual void write_characters(const CharType* s, std::size_t length) = 0; + virtual void write_characters_at(std::size_t position, const CharType* s, std::size_t length) = 0; + virtual std::size_t reserve_characters(std::size_t length) = 0; virtual ~output_adapter_protocol() = default; }; @@ -5862,6 +5864,18 @@ class output_vector_adapter : public output_adapter_protocol std::copy(s, s + length, std::back_inserter(v)); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + std::copy(s, s + length, std::begin(v) + position); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = v.size(); + std::fill_n(std::back_inserter(v), length, static_cast(0x00)); + return position; + } + private: std::vector& v; }; @@ -5883,6 +5897,22 @@ class output_stream_adapter : public output_adapter_protocol stream.write(s, static_cast(length)); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + const auto orig_offset = stream.tellp(); + stream.seekp(static_cast::pos_type>(position)); + stream.write(s, static_cast(length)); + stream.seekp(orig_offset); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = stream.tellp(); + std::vector empty(length, static_cast(0)); + stream.write(empty.data(), length); + return static_cast(position); + } + private: std::basic_ostream& stream; }; @@ -5904,6 +5934,19 @@ class output_string_adapter : public output_adapter_protocol str.append(s, length); } + void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override + { + std::copy(s, s + length, std::begin(str) + position); + } + + std::size_t reserve_characters(std::size_t length) override + { + const auto position = str.size(); + std::fill_n(std::back_inserter(str), length, static_cast(0x00)); + return position; + } + + private: StringType& str; }; @@ -6066,19 +6109,69 @@ class binary_reader private: + template + OutputIt generate_until(OutputIt&& d_first, UnaryPredicate&& pred, Gen&& gen) + { + for (auto x = gen(); !pred(x); x = gen()) + { + *d_first++ = x; + } + + return d_first; + } + + /*! + @param[in] len the length of the array or std::size_t(-1) for an + array of indefinite size + @return whether array creation completed + */ + bool get_bson_str(string_t& result) + { + bool success = true; + generate_until(std::back_inserter(result), [](char c) + { + return c == 0x00; + }, [this, &success] + { + get(); + if (JSON_UNLIKELY(unexpect_eof())) + { + success = false; + } + return static_cast(current); + }); + return success; + } + + bool parse_bson_internal() { std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_object(documentSize - 5))) + if (not JSON_UNLIKELY(sax->start_object(-1))) { return false; } - const auto result = sax->end_object(); + while (auto entry_type = get()) + { + switch (entry_type) + { + case 0x08: + { + string_t key; + get_bson_str(key); + sax->key(key); + sax->boolean(static_cast(get())); + } + break; + } + } get(); + const auto result = sax->end_object(); + return result; } @@ -8369,6 +8462,16 @@ class binary_writer } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x08)); // boolean + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + oa->write_character(j.m_value.boolean ? static_cast(0x01) : static_cast(0x00)); + return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; + } + /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object @@ -8376,8 +8479,16 @@ class binary_writer void write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); - write_number_little_endian(5); + auto document_size_offset = oa->reserve_characters(4ul); + std::int32_t document_size = 5ul; + + for (const auto& el : *j.m_value.object) + { + document_size += write_bson_object_entry(el.first, el.second); + } + oa->write_character(static_cast(0x00)); + write_number_little_endian_at(document_size_offset, document_size); } /*! @@ -8451,6 +8562,30 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } + /* + @brief write a number to output in little endian format + + @param[in] offset The offset where to start writing + @param[in] n number of type @a NumberType + @tparam NumberType the type of the number + */ + template + void write_number_little_endian_at(std::size_t offset, const NumberType n) + { + // step 1: write number to array of length NumberType + std::array vec; + std::memcpy(vec.data(), &n, sizeof(NumberType)); + + // step 2: write array to output (with possible reordering) + if (!is_little_endian) + { + // reverse byte order prior to conversion if necessary + std::reverse(vec.begin(), vec.end()); + } + + oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); + } + // UBJSON: write number (floating point) template expected = + { + 0x0D, 0x00, 0x00, 0x00, // size (little endian) + 0x08, // entry: boolean + 'e', 'n', 't', 'r', 'y', '\x00', + 0x01, // value = true + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + // SECTION("non-empty object with double") + // { + // json j = + // { + // { "entry", true } + // }; + + // std::vector expected = + // { + // 0x14, 0x00, 0x00, 0x00, // size (little endian) + // 0x01, /// entry: double + // 'e', 'n', 't', 'r', 'y', '\x00', + // 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x10, 0x40, + // 0x00 // end marker + // }; + + // const auto result = json::to_bson(j); + // CHECK(result == expected); + + // // roundtrip + // //CHECK(json::from_bson(result) == j); + // //CHECK(json::from_bson(result, true, false) == j); + // } } } From 0c0f2e44b5bad1be335d68b35965ef05eb905e90 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 03:23:54 +0200 Subject: [PATCH 04/28] BSON: support doubles --- .../nlohmann/detail/input/binary_reader.hpp | 12 ++-- .../nlohmann/detail/output/binary_writer.hpp | 29 +++++++- single_include/nlohmann/json.hpp | 41 +++++++++-- test/src/unit-bson.cpp | 70 +++++++++++++------ 4 files changed, 118 insertions(+), 34 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 54833cc309..dc9015b899 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -137,8 +137,6 @@ class binary_reader } /*! - @param[in] len the length of the array or std::size_t(-1) for an - array of indefinite size @return whether array creation completed */ bool get_bson_str(string_t& result) @@ -179,15 +177,19 @@ class binary_reader string_t key; get_bson_str(key); sax->key(key); - sax->boolean(static_cast(get())); - } break; + double number; + get_number_little_endian(number); + sax->number_float(static_cast(number), ""); + } + break; case 0x08: { string_t key; get_bson_str(key); sax->key(key); sax->boolean(static_cast(get())); - } break; + } + break; } } diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 98e6104bc4..283c2cf275 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -676,8 +676,7 @@ class binary_writer } } - - std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + std::size_t write_bson_boolean(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { oa->write_character(static_cast(0x08)); // boolean oa->write_characters( @@ -687,6 +686,32 @@ class binary_writer return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; } + std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x01)); // boolean + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + write_number_little_endian(j.m_value.number_float); + return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; + } + + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + switch (j.type()) + { + default: + JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + break; + case value_t::boolean: + return write_bson_boolean(name, j); + case value_t::number_float: + return write_bson_double(name, j); + }; + + return 0ul; + } + /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 6b81d35482..3da423890d 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6121,8 +6121,6 @@ class binary_reader } /*! - @param[in] len the length of the array or std::size_t(-1) for an - array of indefinite size @return whether array creation completed */ bool get_bson_str(string_t& result) @@ -6158,6 +6156,16 @@ class binary_reader { switch (entry_type) { + case 0x01: + { + string_t key; + get_bson_str(key); + sax->key(key); + double number; + get_number_little_endian(number); + sax->number_float(static_cast(number), ""); + } + break; case 0x08: { string_t key; @@ -8461,8 +8469,7 @@ class binary_writer } } - - std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + std::size_t write_bson_boolean(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { oa->write_character(static_cast(0x08)); // boolean oa->write_characters( @@ -8472,6 +8479,32 @@ class binary_writer return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; } + std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x01)); // boolean + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + write_number_little_endian(j.m_value.number_float); + return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; + } + + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + switch (j.type()) + { + default: + JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + break; + case value_t::boolean: + return write_bson_boolean(name, j); + case value_t::number_float: + return write_bson_double(name, j); + }; + + return 0ul; + } + /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 9a71070729..9774680704 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -136,28 +136,52 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } - // SECTION("non-empty object with double") - // { - // json j = - // { - // { "entry", true } - // }; - - // std::vector expected = - // { - // 0x14, 0x00, 0x00, 0x00, // size (little endian) - // 0x01, /// entry: double - // 'e', 'n', 't', 'r', 'y', '\x00', - // 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x10, 0x40, - // 0x00 // end marker - // }; - - // const auto result = json::to_bson(j); - // CHECK(result == expected); - - // // roundtrip - // //CHECK(json::from_bson(result) == j); - // //CHECK(json::from_bson(result, true, false) == j); - // } + SECTION("non-empty object with bool") + { + json j = + { + { "entry", false } + }; + + std::vector expected = + { + 0x0D, 0x00, 0x00, 0x00, // size (little endian) + 0x08, // entry: boolean + 'e', 'n', 't', 'r', 'y', '\x00', + 0x00, // value = false + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + SECTION("non-empty object with double") + { + json j = + { + { "entry", 4.2 } + }; + + std::vector expected = + { + 0x14, 0x00, 0x00, 0x00, // size (little endian) + 0x01, /// entry: double + 'e', 'n', 't', 'r', 'y', '\x00', + 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x10, 0x40, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From 6c447de0768cb9cf235c886525e1aaa411a34e3d Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 11:33:24 +0200 Subject: [PATCH 05/28] BSON: Support objects with string members --- .../nlohmann/detail/input/binary_reader.hpp | 25 ++++++++--- .../nlohmann/detail/output/binary_writer.hpp | 19 +++++++- single_include/nlohmann/json.hpp | 44 ++++++++++++++++--- test/src/unit-bson.cpp | 26 +++++++++++ 4 files changed, 100 insertions(+), 14 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index dc9015b899..113dcb910c 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -139,7 +139,7 @@ class binary_reader /*! @return whether array creation completed */ - bool get_bson_str(string_t& result) + bool get_bson_cstr(string_t& result) { bool success = true; generate_until(std::back_inserter(result), [](char c) @@ -148,7 +148,7 @@ class binary_reader }, [this, &success] { get(); - if (JSON_UNLIKELY(unexpect_eof())) + if (JSON_UNLIKELY(not unexpect_eof())) { success = false; } @@ -172,20 +172,33 @@ class binary_reader { switch (entry_type) { - case 0x01: + case 0x01: // double { string_t key; - get_bson_str(key); + get_bson_cstr(key); sax->key(key); double number; get_number_little_endian(number); sax->number_float(static_cast(number), ""); } break; - case 0x08: + case 0x02: // string + { + string_t key; + get_bson_cstr(key); + sax->key(key); + std::int32_t len; + string_t value; + get_number_little_endian(len); + get_string(len - 1ul, value); + get(); + sax->string(value); + } + break; + case 0x08: // boolean { string_t key; - get_bson_str(key); + get_bson_cstr(key); sax->key(key); sax->boolean(static_cast(get())); } diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 283c2cf275..a377d3484d 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -688,7 +688,7 @@ class binary_writer std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - oa->write_character(static_cast(0x01)); // boolean + oa->write_character(static_cast(0x01)); // double oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); @@ -696,6 +696,21 @@ class binary_writer return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } + std::size_t write_bson_string(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x02)); // string (UTF-8) + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.string->size() + 1ul)); + oa->write_characters( + reinterpret_cast(j.m_value.string->c_str()), + j.m_value.string->size() + 1); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -707,6 +722,8 @@ class binary_writer return write_bson_boolean(name, j); case value_t::number_float: return write_bson_double(name, j); + case value_t::string: + return write_bson_string(name, j); }; return 0ul; diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 3da423890d..c549f90749 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6123,7 +6123,7 @@ class binary_reader /*! @return whether array creation completed */ - bool get_bson_str(string_t& result) + bool get_bson_cstr(string_t& result) { bool success = true; generate_until(std::back_inserter(result), [](char c) @@ -6132,7 +6132,7 @@ class binary_reader }, [this, &success] { get(); - if (JSON_UNLIKELY(unexpect_eof())) + if (JSON_UNLIKELY(not unexpect_eof())) { success = false; } @@ -6156,20 +6156,33 @@ class binary_reader { switch (entry_type) { - case 0x01: + case 0x01: // double { string_t key; - get_bson_str(key); + get_bson_cstr(key); sax->key(key); double number; get_number_little_endian(number); sax->number_float(static_cast(number), ""); } break; - case 0x08: + case 0x02: // string { string_t key; - get_bson_str(key); + get_bson_cstr(key); + sax->key(key); + std::int32_t len; + string_t value; + get_number_little_endian(len); + get_string(len - 1ul, value); + get(); + sax->string(value); + } + break; + case 0x08: // boolean + { + string_t key; + get_bson_cstr(key); sax->key(key); sax->boolean(static_cast(get())); } @@ -8481,7 +8494,7 @@ class binary_writer std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - oa->write_character(static_cast(0x01)); // boolean + oa->write_character(static_cast(0x01)); // double oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); @@ -8489,6 +8502,21 @@ class binary_writer return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } + std::size_t write_bson_string(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x02)); // string (UTF-8) + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.string->size() + 1ul)); + oa->write_characters( + reinterpret_cast(j.m_value.string->c_str()), + j.m_value.string->size() + 1); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -8500,6 +8528,8 @@ class binary_writer return write_bson_boolean(name, j); case value_t::number_float: return write_bson_double(name, j); + case value_t::string: + return write_bson_string(name, j); }; return 0ul; diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 9774680704..e3b4717f4f 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -183,5 +183,31 @@ TEST_CASE("BSON") CHECK(json::from_bson(result) == j); CHECK(json::from_bson(result, true, false) == j); } + + SECTION("non-empty object with string") + { + json j = + { + { "entry", "bsonstr" } + }; + + std::vector expected = + { + 0x18, 0x00, 0x00, 0x00, // size (little endian) + 0x02, /// entry: string (UTF-8) + 'e', 'n', 't', 'r', 'y', '\x00', + 0x08, 0x00, 0x00, 0x00, 'b', 's', 'o', 'n', 's', 't', 'r', '\x00', + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + } } From c5ef0231712b33c5c05f4d77ac75eec2ac779ffe Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 11:38:26 +0200 Subject: [PATCH 06/28] BSON: support objects with null members --- .../nlohmann/detail/input/binary_reader.hpp | 8 +++++++ .../nlohmann/detail/output/binary_writer.hpp | 12 ++++++++++ single_include/nlohmann/json.hpp | 20 ++++++++++++++++ test/src/unit-bson.cpp | 23 +++++++++++++++++++ 4 files changed, 63 insertions(+) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 113dcb910c..3fd6cc2071 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -203,6 +203,14 @@ class binary_reader sax->boolean(static_cast(get())); } break; + case 0x0A: // null + { + string_t key; + get_bson_cstr(key); + sax->key(key); + sax->null(); + } + break; } } diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index a377d3484d..966d8c22a6 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -711,6 +711,16 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; } + std::size_t write_bson_null(const typename BasicJsonType::string_t& name, const BasicJsonType&) + { + oa->write_character(static_cast(0x0A)); // null + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + return /*id*/ 1ul + name.size() + 1ul; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -724,6 +734,8 @@ class binary_writer return write_bson_double(name, j); case value_t::string: return write_bson_string(name, j); + case value_t::null: + return write_bson_null(name, j); }; return 0ul; diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index c549f90749..faeaf21401 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6187,6 +6187,14 @@ class binary_reader sax->boolean(static_cast(get())); } break; + case 0x0A: // null + { + string_t key; + get_bson_cstr(key); + sax->key(key); + sax->null(); + } + break; } } @@ -8517,6 +8525,16 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; } + std::size_t write_bson_null(const typename BasicJsonType::string_t& name, const BasicJsonType&) + { + oa->write_character(static_cast(0x0A)); // null + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + return /*id*/ 1ul + name.size() + 1ul; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -8530,6 +8548,8 @@ class binary_writer return write_bson_double(name, j); case value_t::string: return write_bson_string(name, j); + case value_t::null: + return write_bson_null(name, j); }; return 0ul; diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index e3b4717f4f..e83e112a81 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -208,6 +208,29 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with null member") + { + json j = + { + { "entry", nullptr } + }; + + std::vector expected = + { + 0x0C, 0x00, 0x00, 0x00, // size (little endian) + 0x0A, /// entry: null + 'e', 'n', 't', 'r', 'y', '\x00', + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + } } From 7ee361f7ad3806258e3c9a7ea2fc8dce5fdb54bc Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 11:54:17 +0200 Subject: [PATCH 07/28] BSON: support objects with int32 members --- .../nlohmann/detail/input/binary_reader.hpp | 10 ++++++++ .../nlohmann/detail/output/binary_writer.hpp | 14 +++++++++++ single_include/nlohmann/json.hpp | 24 +++++++++++++++++++ test/src/unit-bson.cpp | 24 +++++++++++++++++++ 4 files changed, 72 insertions(+) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 3fd6cc2071..f11e164e02 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -203,6 +203,16 @@ class binary_reader sax->boolean(static_cast(get())); } break; + case 0x10: // int32 + { + string_t key; + get_bson_cstr(key); + sax->key(key); + std::int32_t value; + get_number_little_endian(value); + sax->number_integer(static_cast(value)); + } + break; case 0x0A: // null { string_t key; diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 966d8c22a6..ed59b7c201 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -721,6 +721,18 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul; } + std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -732,6 +744,8 @@ class binary_writer return write_bson_boolean(name, j); case value_t::number_float: return write_bson_double(name, j); + case value_t::number_integer: + return write_bson_integer(name, j); case value_t::string: return write_bson_string(name, j); case value_t::null: diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index faeaf21401..d0cce8a17e 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6187,6 +6187,16 @@ class binary_reader sax->boolean(static_cast(get())); } break; + case 0x10: // int32 + { + string_t key; + get_bson_cstr(key); + sax->key(key); + std::int32_t value; + get_number_little_endian(value); + sax->number_integer(static_cast(value)); + } + break; case 0x0A: // null { string_t key; @@ -8535,6 +8545,18 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul; } + std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -8546,6 +8568,8 @@ class binary_writer return write_bson_boolean(name, j); case value_t::number_float: return write_bson_double(name, j); + case value_t::number_integer: + return write_bson_integer(name, j); case value_t::string: return write_bson_string(name, j); case value_t::null: diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index e83e112a81..266dd12af4 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -231,6 +231,30 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with integer (32-bit) member") + { + json j = + { + { "entry", std::int32_t{0x12345678} } + }; + + std::vector expected = + { + 0x10, 0x00, 0x00, 0x00, // size (little endian) + 0x10, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + 0x78, 0x56, 0x34, 0x12, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + } } From c0d8921a6797497f3fbd2a8c2a2b29aaca9704c3 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 12:00:53 +0200 Subject: [PATCH 08/28] BSON: support objects with int64 members --- .../nlohmann/detail/input/binary_reader.hpp | 10 ++++++ .../nlohmann/detail/output/binary_writer.hpp | 26 ++++++++++---- single_include/nlohmann/json.hpp | 36 +++++++++++++++---- test/src/unit-bson.cpp | 23 ++++++++++++ 4 files changed, 83 insertions(+), 12 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index f11e164e02..d135a4c2ea 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -213,6 +213,16 @@ class binary_reader sax->number_integer(static_cast(value)); } break; + case 0x12: // int64 + { + string_t key; + get_bson_cstr(key); + sax->key(key); + std::int64_t value; + get_number_little_endian(value); + sax->number_integer(static_cast(value)); + } + break; case 0x0A: // null { string_t key; diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index ed59b7c201..24426d489d 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -723,14 +723,28 @@ class binary_writer std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + if (j.m_value.number_integer <= static_cast((std::numeric_limits::max)())) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); - write_number_little_endian(static_cast(j.m_value.number_integer)); + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + else + { + oa->write_character(static_cast(0x12)); // int64 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + } } std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index d0cce8a17e..c564e57fb2 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6197,6 +6197,16 @@ class binary_reader sax->number_integer(static_cast(value)); } break; + case 0x12: // int64 + { + string_t key; + get_bson_cstr(key); + sax->key(key); + std::int64_t value; + get_number_little_endian(value); + sax->number_integer(static_cast(value)); + } + break; case 0x0A: // null { string_t key; @@ -8547,14 +8557,28 @@ class binary_writer std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + if (j.m_value.number_integer <= static_cast((std::numeric_limits::max)())) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + else + { + oa->write_character(static_cast(0x12)); // int64 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number_little_endian(static_cast(j.m_value.number_integer)); - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + } } std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 266dd12af4..73989769e7 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -255,6 +255,29 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with integer (64-bit) member") + { + json j = + { + { "entry", std::int64_t{0x1234567804030201} } + }; + + std::vector expected = + { + 0x14, 0x00, 0x00, 0x00, // size (little endian) + 0x12, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + 0x01, 0x02, 0x03, 0x04, 0x78, 0x56, 0x34, 0x12, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From 83b427ad676795d4181c49513aaa46b8352e27eb Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 12:11:21 +0200 Subject: [PATCH 09/28] BSON: unsigned integers --- .../nlohmann/detail/output/binary_writer.hpp | 34 ++++++++- single_include/nlohmann/json.hpp | 34 ++++++++- test/src/unit-bson.cpp | 72 +++++++++++++++++++ 3 files changed, 136 insertions(+), 4 deletions(-) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 24426d489d..770c7dd3ef 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -723,14 +723,42 @@ class binary_writer std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - if (j.m_value.number_integer <= static_cast((std::numeric_limits::max)())) + auto n = j.m_value.number_integer; + if ((std::numeric_limits::min)() <= n and n <= (std::numeric_limits::max)()) { oa->write_character(static_cast(0x10)); // int32 oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number_little_endian(static_cast(n)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + else + { + oa->write_character(static_cast(0x12)); // int64 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + } + } + + std::size_t write_bson_unsigned(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + auto n = j.m_value.number_integer; + if (n <= static_cast((std::numeric_limits::max)())) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -760,6 +788,8 @@ class binary_writer return write_bson_double(name, j); case value_t::number_integer: return write_bson_integer(name, j); + case value_t::number_unsigned: + return write_bson_unsigned(name, j); case value_t::string: return write_bson_string(name, j); case value_t::null: diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index c564e57fb2..fa1d8e3918 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -8557,14 +8557,42 @@ class binary_writer std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { - if (j.m_value.number_integer <= static_cast((std::numeric_limits::max)())) + auto n = j.m_value.number_integer; + if ((std::numeric_limits::min)() <= n and n <= (std::numeric_limits::max)()) { oa->write_character(static_cast(0x10)); // int32 oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number_little_endian(static_cast(n)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + } + else + { + oa->write_character(static_cast(0x12)); // int64 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(j.m_value.number_integer)); + + return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + } + } + + std::size_t write_bson_unsigned(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + auto n = j.m_value.number_integer; + if (n <= static_cast((std::numeric_limits::max)())) + { + oa->write_character(static_cast(0x10)); // int32 + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + write_number_little_endian(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -8594,6 +8622,8 @@ class binary_writer return write_bson_double(name, j); case value_t::number_integer: return write_bson_integer(name, j); + case value_t::number_unsigned: + return write_bson_unsigned(name, j); case value_t::string: return write_bson_string(name, j); case value_t::null: diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 73989769e7..8de05e8079 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -279,5 +279,77 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with negative integer (32-bit) member") + { + json j = + { + { "entry", std::int32_t{-1} } + }; + + std::vector expected = + { + 0x10, 0x00, 0x00, 0x00, // size (little endian) + 0x10, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + 0xFF, 0xFF, 0xFF, 0xFF, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + SECTION("non-empty object with negative integer (64-bit) member") + { + json j = + { + { "entry", std::int64_t{-1} } + }; + + std::vector expected = + { + 0x10, 0x00, 0x00, 0x00, // size (little endian) + 0x10, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + 0xFF, 0xFF, 0xFF, 0xFF, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + SECTION("non-empty object with unsigned integer (64-bit) member") + { + // directly encoding uint64 is not supported in bson (only for timestamp values) + json j = + { + { "entry", std::uint64_t{0x1234567804030201} } + }; + + std::vector expected = + { + 0x14, 0x00, 0x00, 0x00, // size (little endian) + 0x12, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + 0x01, 0x02, 0x03, 0x04, 0x78, 0x56, 0x34, 0x12, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From 5ce7d6bdd7dc28d8d9e8f6d3bc91b541217bdb5d Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 13:03:42 +0200 Subject: [PATCH 10/28] BSON: support objects with objects as members --- .../nlohmann/detail/input/binary_reader.hpp | 9 +++++- .../nlohmann/detail/output/binary_writer.hpp | 17 ++++++++++- single_include/nlohmann/json.hpp | 26 +++++++++++++++-- test/src/unit-bson.cpp | 29 +++++++++++++++++++ 4 files changed, 77 insertions(+), 4 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index d135a4c2ea..7deb788a60 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -231,10 +231,17 @@ class binary_reader sax->null(); } break; + case 0x03: // object + { + string_t key; + get_bson_cstr(key); + sax->key(key); + parse_bson_internal(); + } + break; } } - get(); const auto result = sax->end_object(); return result; diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 770c7dd3ef..1ec1d79480 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -775,6 +775,18 @@ class binary_writer } } + std::size_t write_bson_object_internal(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x03)); // object + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + auto const embedded_document_size = write_bson_object(j); + + return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -782,6 +794,8 @@ class binary_writer default: JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); break; + case value_t::object: + return write_bson_object_internal(name, j); case value_t::boolean: return write_bson_boolean(name, j); case value_t::number_float: @@ -803,7 +817,7 @@ class binary_writer @param[in] j JSON value to serialize @pre j.type() == value_t::object */ - void write_bson_object(const BasicJsonType& j) + std::size_t write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); auto document_size_offset = oa->reserve_characters(4ul); @@ -816,6 +830,7 @@ class binary_writer oa->write_character(static_cast(0x00)); write_number_little_endian_at(document_size_offset, document_size); + return document_size; } /*! diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index fa1d8e3918..6201f047ba 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6215,10 +6215,17 @@ class binary_reader sax->null(); } break; + case 0x03: // object + { + string_t key; + get_bson_cstr(key); + sax->key(key); + parse_bson_internal(); + } + break; } } - get(); const auto result = sax->end_object(); return result; @@ -8609,6 +8616,18 @@ class binary_writer } } + std::size_t write_bson_object_internal(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x03)); // object + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + auto const embedded_document_size = write_bson_object(j); + + return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -8616,6 +8635,8 @@ class binary_writer default: JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); break; + case value_t::object: + return write_bson_object_internal(name, j); case value_t::boolean: return write_bson_boolean(name, j); case value_t::number_float: @@ -8637,7 +8658,7 @@ class binary_writer @param[in] j JSON value to serialize @pre j.type() == value_t::object */ - void write_bson_object(const BasicJsonType& j) + std::size_t write_bson_object(const BasicJsonType& j) { assert(j.type() == value_t::object); auto document_size_offset = oa->reserve_characters(4ul); @@ -8650,6 +8671,7 @@ class binary_writer oa->write_character(static_cast(0x00)); write_number_little_endian_at(document_size_offset, document_size); + return document_size; } /*! diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 8de05e8079..bdc6fe74ef 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -351,5 +351,34 @@ TEST_CASE("BSON") CHECK(json::from_bson(result) == j); CHECK(json::from_bson(result, true, false) == j); } + + SECTION("non-empty object with object member") + { + // directly encoding uint64 is not supported in bson (only for timestamp values) + json j = + { + { "entry", json::object() } + }; + + std::vector expected = + { + 0x11, 0x00, 0x00, 0x00, // size (little endian) + 0x03, /// entry: embedded document + 'e', 'n', 't', 'r', 'y', '\x00', + + 0x05, 0x00, 0x00, 0x00, // size (little endian) + // no entries + 0x00, // end marker (embedded document) + + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From 120d1d77d4371db55dffefa27c1ec16fd648e40a Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 13:40:20 +0200 Subject: [PATCH 11/28] BSON: test case for a more complex document --- .../nlohmann/detail/output/binary_writer.hpp | 2 +- single_include/nlohmann/json.hpp | 2 +- test/src/unit-bson.cpp | 32 +++++++++++++++++++ 3 files changed, 34 insertions(+), 2 deletions(-) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 1ec1d79480..aa4f34fe8e 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -792,7 +792,7 @@ class binary_writer switch (j.type()) { default: - JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + JSON_THROW(type_error::create(317, "JSON value of type be serialized to requested format: " + std::to_string((int)j.type()))); break; case value_t::object: return write_bson_object_internal(name, j); diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 6201f047ba..1c966bc3e6 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -8633,7 +8633,7 @@ class binary_writer switch (j.type()) { default: - JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + JSON_THROW(type_error::create(317, "JSON value of type be serialized to requested format: " + std::to_string((int)j.type()))); break; case value_t::object: return write_bson_object_internal(name, j); diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index bdc6fe74ef..c016466d1b 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -380,5 +380,37 @@ TEST_CASE("BSON") CHECK(json::from_bson(result) == j); CHECK(json::from_bson(result, true, false) == j); } + + SECTION("Some more complex document") + { + // directly encoding uint64 is not supported in bson (only for timestamp values) + json j = + { + {"double", 42.5}, + {"entry", 4.2}, + {"number", 12345}, + {"object", {{ "string", "value" }}} + }; + + std::vector expected = + { + /*size */ 0x4f, 0x00, 0x00, 0x00, + /*entry*/ 0x01, 'd', 'o', 'u', 'b', 'l', 'e', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x45, 0x40, + /*entry*/ 0x01, 'e', 'n', 't', 'r', 'y', 0x00, 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x10, 0x40, + /*entry*/ 0x10, 'n', 'u', 'm', 'b', 'e', 'r', 0x00, 0x39, 0x30, 0x00, 0x00, + /*entry*/ 0x03, 'o', 'b', 'j', 'e', 'c', 't', 0x00, + /*entry: obj-size */ 0x17, 0x00, 0x00, 0x00, + /*entry: obj-entry*/0x02, 's', 't', 'r', 'i', 'n', 'g', 0x00, 0x06, 0x00, 0x00, 0x00, 'v', 'a', 'l', 'u', 'e', 0, + /*entry: obj-term.*/0x00, + /*obj-term*/ 0x00 + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } } } From cf485c2907e394aafc50e77bc372603467ee9f33 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 13:54:08 +0200 Subject: [PATCH 12/28] BSON: Support for arrays --- .../nlohmann/detail/input/binary_reader.hpp | 49 ++++++++++--- .../nlohmann/detail/output/binary_writer.hpp | 24 ++++++ single_include/nlohmann/json.hpp | 73 ++++++++++++++++--- test/src/unit-bson.cpp | 29 +++++++- 4 files changed, 154 insertions(+), 21 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 7deb788a60..140cd8ab19 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -157,17 +157,8 @@ class binary_reader return success; } - - bool parse_bson_internal() + void parse_bson_entries() { - std::int32_t documentSize; - get_number_little_endian(documentSize); - - if (not JSON_UNLIKELY(sax->start_object(-1))) - { - return false; - } - while (auto entry_type = get()) { switch (entry_type) @@ -239,8 +230,46 @@ class binary_reader parse_bson_internal(); } break; + case 0x04: // array + { + string_t key; + get_bson_cstr(key); + sax->key(key); + parse_bson_array(); + } + break; } } + } + + bool parse_bson_array() + { + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_array(-1))) + { + return false; + } + + parse_bson_entries(); + + const auto result = sax->end_array(); + + return result; + } + + bool parse_bson_internal() + { + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_object(-1))) + { + return false; + } + + parse_bson_entries(); const auto result = sax->end_object(); diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index aa4f34fe8e..24333935d0 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -787,6 +787,28 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; } + std::size_t write_bson_array(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x04)); // object + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + + auto document_size_offset = oa->reserve_characters(4ul); + std::int32_t embedded_document_size = 5ul; + + for (const auto& el : *j.m_value.array) + { + embedded_document_size += write_bson_object_entry("", el); + } + + oa->write_character(static_cast(0x00)); + write_number_little_endian_at(document_size_offset, embedded_document_size); + + return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -796,6 +818,8 @@ class binary_writer break; case value_t::object: return write_bson_object_internal(name, j); + case value_t::array: + return write_bson_array(name, j); case value_t::boolean: return write_bson_boolean(name, j); case value_t::number_float: diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 1c966bc3e6..adb0d29410 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6141,17 +6141,8 @@ class binary_reader return success; } - - bool parse_bson_internal() + void parse_bson_entries() { - std::int32_t documentSize; - get_number_little_endian(documentSize); - - if (not JSON_UNLIKELY(sax->start_object(-1))) - { - return false; - } - while (auto entry_type = get()) { switch (entry_type) @@ -6223,8 +6214,46 @@ class binary_reader parse_bson_internal(); } break; + case 0x04: // array + { + string_t key; + get_bson_cstr(key); + sax->key(key); + parse_bson_array(); + } + break; } } + } + + bool parse_bson_array() + { + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_array(-1))) + { + return false; + } + + parse_bson_entries(); + + const auto result = sax->end_array(); + + return result; + } + + bool parse_bson_internal() + { + std::int32_t documentSize; + get_number_little_endian(documentSize); + + if (not JSON_UNLIKELY(sax->start_object(-1))) + { + return false; + } + + parse_bson_entries(); const auto result = sax->end_object(); @@ -8628,6 +8657,28 @@ class binary_writer return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; } + std::size_t write_bson_array(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + oa->write_character(static_cast(0x04)); // object + oa->write_characters( + reinterpret_cast(name.c_str()), + name.size() + 1u); + + + auto document_size_offset = oa->reserve_characters(4ul); + std::int32_t embedded_document_size = 5ul; + + for (const auto& el : *j.m_value.array) + { + embedded_document_size += write_bson_object_entry("", el); + } + + oa->write_character(static_cast(0x00)); + write_number_little_endian_at(document_size_offset, embedded_document_size); + + return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + } + std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) @@ -8637,6 +8688,8 @@ class binary_writer break; case value_t::object: return write_bson_object_internal(name, j); + case value_t::array: + return write_bson_array(name, j); case value_t::boolean: return write_bson_boolean(name, j); case value_t::number_float: diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index c016466d1b..b288611072 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -354,7 +354,6 @@ TEST_CASE("BSON") SECTION("non-empty object with object member") { - // directly encoding uint64 is not supported in bson (only for timestamp values) json j = { { "entry", json::object() } @@ -381,6 +380,34 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with array member") + { + json j = + { + { "entry", json::array() } + }; + + std::vector expected = + { + 0x11, 0x00, 0x00, 0x00, // size (little endian) + 0x04, /// entry: embedded document + 'e', 'n', 't', 'r', 'y', '\x00', + + 0x05, 0x00, 0x00, 0x00, // size (little endian) + // no entries + 0x00, // end marker (embedded document) + + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + SECTION("Some more complex document") { // directly encoding uint64 is not supported in bson (only for timestamp values) From df33a90774c8a63140b49685c47be964a2409167 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 15 Sep 2018 14:08:38 +0200 Subject: [PATCH 13/28] BSON: Bugfix for non-empty arrays --- .../nlohmann/detail/input/binary_reader.hpp | 37 +++++-------------- single_include/nlohmann/json.hpp | 37 +++++-------------- test/src/unit-bson.cpp | 35 ++++++++++++++++++ 3 files changed, 55 insertions(+), 54 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 140cd8ab19..f4049bd3b2 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -157,17 +157,21 @@ class binary_reader return success; } - void parse_bson_entries() + void parse_bson_entries(bool is_array) { while (auto entry_type = get()) { + string_t key; + get_bson_cstr(key); + if (!is_array) + { + sax->key(key); + } + switch (entry_type) { case 0x01: // double { - string_t key; - get_bson_cstr(key); - sax->key(key); double number; get_number_little_endian(number); sax->number_float(static_cast(number), ""); @@ -175,9 +179,6 @@ class binary_reader break; case 0x02: // string { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int32_t len; string_t value; get_number_little_endian(len); @@ -188,17 +189,11 @@ class binary_reader break; case 0x08: // boolean { - string_t key; - get_bson_cstr(key); - sax->key(key); sax->boolean(static_cast(get())); } break; case 0x10: // int32 { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int32_t value; get_number_little_endian(value); sax->number_integer(static_cast(value)); @@ -206,9 +201,6 @@ class binary_reader break; case 0x12: // int64 { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int64_t value; get_number_little_endian(value); sax->number_integer(static_cast(value)); @@ -216,25 +208,16 @@ class binary_reader break; case 0x0A: // null { - string_t key; - get_bson_cstr(key); - sax->key(key); sax->null(); } break; case 0x03: // object { - string_t key; - get_bson_cstr(key); - sax->key(key); parse_bson_internal(); } break; case 0x04: // array { - string_t key; - get_bson_cstr(key); - sax->key(key); parse_bson_array(); } break; @@ -252,7 +235,7 @@ class binary_reader return false; } - parse_bson_entries(); + parse_bson_entries(/*is_array*/true); const auto result = sax->end_array(); @@ -269,7 +252,7 @@ class binary_reader return false; } - parse_bson_entries(); + parse_bson_entries(/*is_array*/false); const auto result = sax->end_object(); diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index adb0d29410..6f481a8f6b 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6141,17 +6141,21 @@ class binary_reader return success; } - void parse_bson_entries() + void parse_bson_entries(bool is_array) { while (auto entry_type = get()) { + string_t key; + get_bson_cstr(key); + if (!is_array) + { + sax->key(key); + } + switch (entry_type) { case 0x01: // double { - string_t key; - get_bson_cstr(key); - sax->key(key); double number; get_number_little_endian(number); sax->number_float(static_cast(number), ""); @@ -6159,9 +6163,6 @@ class binary_reader break; case 0x02: // string { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int32_t len; string_t value; get_number_little_endian(len); @@ -6172,17 +6173,11 @@ class binary_reader break; case 0x08: // boolean { - string_t key; - get_bson_cstr(key); - sax->key(key); sax->boolean(static_cast(get())); } break; case 0x10: // int32 { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int32_t value; get_number_little_endian(value); sax->number_integer(static_cast(value)); @@ -6190,9 +6185,6 @@ class binary_reader break; case 0x12: // int64 { - string_t key; - get_bson_cstr(key); - sax->key(key); std::int64_t value; get_number_little_endian(value); sax->number_integer(static_cast(value)); @@ -6200,25 +6192,16 @@ class binary_reader break; case 0x0A: // null { - string_t key; - get_bson_cstr(key); - sax->key(key); sax->null(); } break; case 0x03: // object { - string_t key; - get_bson_cstr(key); - sax->key(key); parse_bson_internal(); } break; case 0x04: // array { - string_t key; - get_bson_cstr(key); - sax->key(key); parse_bson_array(); } break; @@ -6236,7 +6219,7 @@ class binary_reader return false; } - parse_bson_entries(); + parse_bson_entries(/*is_array*/true); const auto result = sax->end_array(); @@ -6253,7 +6236,7 @@ class binary_reader return false; } - parse_bson_entries(); + parse_bson_entries(/*is_array*/false); const auto result = sax->end_object(); diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index b288611072..fcaf51d6f0 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -408,6 +408,41 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with non-empty array member") + { + json j = + { + { "entry", json::array({1, 2, 3, 4, 5, 6, 7, 8}) } + }; + + std::vector expected = + { + 0x41, 0x00, 0x00, 0x00, // size (little endian) + 0x04, /// entry: embedded document + 'e', 'n', 't', 'r', 'y', '\x00', + + 0x35, 0x00, 0x00, 0x00, // size (little endian) + 0x10, 0x00, 0x01, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x02, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x03, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x04, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x05, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x06, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x07, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x08, 0x00, 0x00, 0x00, + 0x00, // end marker (embedded document) + + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + SECTION("Some more complex document") { // directly encoding uint64 is not supported in bson (only for timestamp values) From 763705c2a7fca0dd3b6569e783403b917ee03b09 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Mon, 24 Sep 2018 19:29:39 +0200 Subject: [PATCH 14/28] Fix: Add missing `begin()` and `end()` member functions to `alt_string` --- test/src/unit-alt-string.cpp | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/test/src/unit-alt-string.cpp b/test/src/unit-alt-string.cpp index 356835c013..ba52d6a42d 100644 --- a/test/src/unit-alt-string.cpp +++ b/test/src/unit-alt-string.cpp @@ -102,6 +102,10 @@ class alt_string str_impl.resize(n, c); } + auto begin() -> std::string::iterator { return str_impl.begin(); } + + auto end() -> std::string::iterator { return str_impl.end(); } + template bool operator<(const op_type& op) const { From bce4816275bc4b856643219a5418198ab258c522 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Mon, 24 Sep 2018 23:35:19 +0200 Subject: [PATCH 15/28] BSON: Added test case for the different input/output_adapters --- test/src/unit-alt-string.cpp | 10 +++++-- test/src/unit-bson.cpp | 58 ++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 2 deletions(-) diff --git a/test/src/unit-alt-string.cpp b/test/src/unit-alt-string.cpp index ba52d6a42d..d866ed703c 100644 --- a/test/src/unit-alt-string.cpp +++ b/test/src/unit-alt-string.cpp @@ -102,9 +102,15 @@ class alt_string str_impl.resize(n, c); } - auto begin() -> std::string::iterator { return str_impl.begin(); } + auto begin() -> std::string::iterator + { + return str_impl.begin(); + } - auto end() -> std::string::iterator { return str_impl.end(); } + auto end() -> std::string::iterator + { + return str_impl.end(); + } template bool operator<(const op_type& op) const diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index fcaf51d6f0..c701af40e6 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -476,3 +476,61 @@ TEST_CASE("BSON") } } } + +TEST_CASE("BSON input/output_adapters") +{ + json json_representation = + { + {"double", 42.5}, + {"entry", 4.2}, + {"number", 12345}, + {"object", {{ "string", "value" }}} + }; + + std::vector bson_representation = + { + /*size */ 0x4f, 0x00, 0x00, 0x00, + /*entry*/ 0x01, 'd', 'o', 'u', 'b', 'l', 'e', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x45, 0x40, + /*entry*/ 0x01, 'e', 'n', 't', 'r', 'y', 0x00, 0xcd, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x10, 0x40, + /*entry*/ 0x10, 'n', 'u', 'm', 'b', 'e', 'r', 0x00, 0x39, 0x30, 0x00, 0x00, + /*entry*/ 0x03, 'o', 'b', 'j', 'e', 'c', 't', 0x00, + /*entry: obj-size */ 0x17, 0x00, 0x00, 0x00, + /*entry: obj-entry*/0x02, 's', 't', 'r', 'i', 'n', 'g', 0x00, 0x06, 0x00, 0x00, 0x00, 'v', 'a', 'l', 'u', 'e', 0, + /*entry: obj-term.*/0x00, + /*obj-term*/ 0x00 + }; + + json j2; + CHECK_NOTHROW(j2 = json::from_bson(bson_representation)); + + // compare parsed JSON values + CHECK(json_representation == j2); + + SECTION("roundtrips") + { + SECTION("std::ostringstream") + { + std::ostringstream ss; + json::to_bson(json_representation, ss); + std::istringstream iss(ss.str()); + json j3 = json::from_bson(iss); + CHECK(json_representation == j3); + } + + SECTION("std::string") + { + std::string s; + json::to_bson(json_representation, s); + json j3 = json::from_bson(s); + CHECK(json_representation == j3); + } + + SECTION("std::vector") + { + std::vector v; + json::to_bson(json_representation, v); + json j3 = json::from_bson(v); + CHECK(json_representation == j3); + } + } +} From ef358ae695d1d3c6f20681a4a4c3aa7b64b967ad Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Tue, 25 Sep 2018 20:34:25 +0200 Subject: [PATCH 16/28] BSON: Fixed hangup in case of incomplete bson input and improved test coverage --- .../nlohmann/detail/input/binary_reader.hpp | 35 ++-- .../nlohmann/detail/output/binary_writer.hpp | 59 +++--- single_include/nlohmann/json.hpp | 94 +++++----- test/src/unit-bson.cpp | 174 ++++++++++++++++++ 4 files changed, 260 insertions(+), 102 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index f4049bd3b2..0a95fef5ae 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -142,9 +142,9 @@ class binary_reader bool get_bson_cstr(string_t& result) { bool success = true; - generate_until(std::back_inserter(result), [](char c) + generate_until(std::back_inserter(result), [&success](char c) { - return c == 0x00; + return c == 0x00 || !success; }, [this, &success] { get(); @@ -157,12 +157,16 @@ class binary_reader return success; } - void parse_bson_entries(bool is_array) + bool parse_bson_entries(bool is_array) { while (auto entry_type = get()) { string_t key; - get_bson_cstr(key); + if (!get_bson_cstr(key)) + { + return false; + } + if (!is_array) { sax->key(key); @@ -223,6 +227,7 @@ class binary_reader break; } } + return true; } bool parse_bson_array() @@ -230,16 +235,17 @@ class binary_reader std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_array(-1))) + if (JSON_UNLIKELY(not sax->start_array(-1))) { return false; } - parse_bson_entries(/*is_array*/true); - - const auto result = sax->end_array(); + if (!parse_bson_entries(/*is_array*/true)) + { + return false; + } - return result; + return sax->end_array(); } bool parse_bson_internal() @@ -247,16 +253,17 @@ class binary_reader std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_object(-1))) + if (JSON_UNLIKELY(not sax->start_object(-1))) { return false; } - parse_bson_entries(/*is_array*/false); - - const auto result = sax->end_object(); + if (!parse_bson_entries(/*is_array*/false)) + { + return false; + } - return result; + return sax->end_object(); } /*! diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 24333935d0..d9655f93fd 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -692,7 +692,7 @@ class binary_writer oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(j.m_value.number_float); + write_number(j.m_value.number_float); return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } @@ -703,7 +703,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.string->size() + 1ul)); + write_number(static_cast(j.m_value.string->size() + 1ul)); oa->write_characters( reinterpret_cast(j.m_value.string->c_str()), j.m_value.string->size() + 1); @@ -731,7 +731,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(n)); + write_number(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -742,7 +742,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number(static_cast(j.m_value.number_integer)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); } @@ -758,7 +758,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(n)); + write_number(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -769,7 +769,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number(static_cast(j.m_value.number_integer)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); } @@ -804,7 +804,7 @@ class binary_writer } oa->write_character(static_cast(0x00)); - write_number_little_endian_at(document_size_offset, embedded_document_size); + write_number_at(document_size_offset, embedded_document_size); return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; } @@ -813,9 +813,11 @@ class binary_writer { switch (j.type()) { + // LCOV_EXCL_START default: - JSON_THROW(type_error::create(317, "JSON value of type be serialized to requested format: " + std::to_string((int)j.type()))); + assert(false); break; + // LCOV_EXCL_STOP case value_t::object: return write_bson_object_internal(name, j); case value_t::array: @@ -853,7 +855,7 @@ class binary_writer } oa->write_character(static_cast(0x00)); - write_number_little_endian_at(document_size_offset, document_size); + write_number_at(document_size_offset, document_size); return document_size; } @@ -883,12 +885,14 @@ class binary_writer @param[in] n number of type @a NumberType @tparam NumberType the type of the number + @tparam OutputIsLittleEndian Set to true if output data is + required to be little endian @note This function needs to respect the system's endianess, because bytes in CBOR, MessagePack, and UBJSON are stored in network order (big endian) and therefore need reordering on little endian systems. */ - template + template void write_number(const NumberType n) { // step 1: write number to array of length NumberType @@ -896,30 +900,7 @@ class binary_writer std::memcpy(vec.data(), &n, sizeof(NumberType)); // step 2: write array to output (with possible reordering) - if (is_little_endian) - { - // reverse byte order prior to conversion if necessary - std::reverse(vec.begin(), vec.end()); - } - - oa->write_characters(vec.data(), sizeof(NumberType)); - } - - /* - @brief write a number to output in little endian format - - @param[in] n number of type @a NumberType - @tparam NumberType the type of the number - */ - template - void write_number_little_endian(const NumberType n) - { - // step 1: write number to array of length NumberType - std::array vec; - std::memcpy(vec.data(), &n, sizeof(NumberType)); - - // step 2: write array to output (with possible reordering) - if (!is_little_endian) + if (is_little_endian && !OutputIsLittleEndian) { // reverse byte order prior to conversion if necessary std::reverse(vec.begin(), vec.end()); @@ -934,20 +915,24 @@ class binary_writer @param[in] offset The offset where to start writing @param[in] n number of type @a NumberType @tparam NumberType the type of the number + @tparam OutputIsLittleEndian Set to true if output data is + required to be little endian */ - template - void write_number_little_endian_at(std::size_t offset, const NumberType n) + template + void write_number_at(std::size_t offset, const NumberType n) { // step 1: write number to array of length NumberType std::array vec; std::memcpy(vec.data(), &n, sizeof(NumberType)); // step 2: write array to output (with possible reordering) - if (!is_little_endian) + // LCOV_EXCL_START + if (is_little_endian && !OutputIsLittleEndian) { // reverse byte order prior to conversion if necessary std::reverse(vec.begin(), vec.end()); } + // LCOV_EXCL_STOP oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); } diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 6f481a8f6b..3f7cd4e706 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6126,9 +6126,9 @@ class binary_reader bool get_bson_cstr(string_t& result) { bool success = true; - generate_until(std::back_inserter(result), [](char c) + generate_until(std::back_inserter(result), [&success](char c) { - return c == 0x00; + return c == 0x00 || !success; }, [this, &success] { get(); @@ -6141,12 +6141,16 @@ class binary_reader return success; } - void parse_bson_entries(bool is_array) + bool parse_bson_entries(bool is_array) { while (auto entry_type = get()) { string_t key; - get_bson_cstr(key); + if (!get_bson_cstr(key)) + { + return false; + } + if (!is_array) { sax->key(key); @@ -6207,6 +6211,7 @@ class binary_reader break; } } + return true; } bool parse_bson_array() @@ -6214,16 +6219,17 @@ class binary_reader std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_array(-1))) + if (JSON_UNLIKELY(not sax->start_array(-1))) { return false; } - parse_bson_entries(/*is_array*/true); - - const auto result = sax->end_array(); + if (!parse_bson_entries(/*is_array*/true)) + { + return false; + } - return result; + return sax->end_array(); } bool parse_bson_internal() @@ -6231,16 +6237,17 @@ class binary_reader std::int32_t documentSize; get_number_little_endian(documentSize); - if (not JSON_UNLIKELY(sax->start_object(-1))) + if (JSON_UNLIKELY(not sax->start_object(-1))) { return false; } - parse_bson_entries(/*is_array*/false); - - const auto result = sax->end_object(); + if (!parse_bson_entries(/*is_array*/false)) + { + return false; + } - return result; + return sax->end_object(); } /*! @@ -8545,7 +8552,7 @@ class binary_writer oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(j.m_value.number_float); + write_number(j.m_value.number_float); return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } @@ -8556,7 +8563,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.string->size() + 1ul)); + write_number(static_cast(j.m_value.string->size() + 1ul)); oa->write_characters( reinterpret_cast(j.m_value.string->c_str()), j.m_value.string->size() + 1); @@ -8584,7 +8591,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(n)); + write_number(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -8595,7 +8602,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number(static_cast(j.m_value.number_integer)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); } @@ -8611,7 +8618,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(n)); + write_number(static_cast(n)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); } @@ -8622,7 +8629,7 @@ class binary_writer reinterpret_cast(name.c_str()), name.size() + 1u); - write_number_little_endian(static_cast(j.m_value.number_integer)); + write_number(static_cast(j.m_value.number_integer)); return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); } @@ -8657,7 +8664,7 @@ class binary_writer } oa->write_character(static_cast(0x00)); - write_number_little_endian_at(document_size_offset, embedded_document_size); + write_number_at(document_size_offset, embedded_document_size); return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; } @@ -8666,9 +8673,11 @@ class binary_writer { switch (j.type()) { + // LCOV_EXCL_START default: - JSON_THROW(type_error::create(317, "JSON value of type be serialized to requested format: " + std::to_string((int)j.type()))); + assert(false); break; + // LCOV_EXCL_STOP case value_t::object: return write_bson_object_internal(name, j); case value_t::array: @@ -8706,7 +8715,7 @@ class binary_writer } oa->write_character(static_cast(0x00)); - write_number_little_endian_at(document_size_offset, document_size); + write_number_at(document_size_offset, document_size); return document_size; } @@ -8736,12 +8745,14 @@ class binary_writer @param[in] n number of type @a NumberType @tparam NumberType the type of the number + @tparam OutputIsLittleEndian Set to true if output data is + required to be little endian @note This function needs to respect the system's endianess, because bytes in CBOR, MessagePack, and UBJSON are stored in network order (big endian) and therefore need reordering on little endian systems. */ - template + template void write_number(const NumberType n) { // step 1: write number to array of length NumberType @@ -8749,30 +8760,7 @@ class binary_writer std::memcpy(vec.data(), &n, sizeof(NumberType)); // step 2: write array to output (with possible reordering) - if (is_little_endian) - { - // reverse byte order prior to conversion if necessary - std::reverse(vec.begin(), vec.end()); - } - - oa->write_characters(vec.data(), sizeof(NumberType)); - } - - /* - @brief write a number to output in little endian format - - @param[in] n number of type @a NumberType - @tparam NumberType the type of the number - */ - template - void write_number_little_endian(const NumberType n) - { - // step 1: write number to array of length NumberType - std::array vec; - std::memcpy(vec.data(), &n, sizeof(NumberType)); - - // step 2: write array to output (with possible reordering) - if (!is_little_endian) + if (is_little_endian && !OutputIsLittleEndian) { // reverse byte order prior to conversion if necessary std::reverse(vec.begin(), vec.end()); @@ -8787,20 +8775,24 @@ class binary_writer @param[in] offset The offset where to start writing @param[in] n number of type @a NumberType @tparam NumberType the type of the number + @tparam OutputIsLittleEndian Set to true if output data is + required to be little endian */ - template - void write_number_little_endian_at(std::size_t offset, const NumberType n) + template + void write_number_at(std::size_t offset, const NumberType n) { // step 1: write number to array of length NumberType std::array vec; std::memcpy(vec.data(), &n, sizeof(NumberType)); // step 2: write array to output (with possible reordering) - if (!is_little_endian) + // LCOV_EXCL_START + if (is_little_endian && !OutputIsLittleEndian) { // reverse byte order prior to conversion if necessary std::reverse(vec.begin(), vec.end()); } + // LCOV_EXCL_STOP oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); } diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index c701af40e6..cbb6785e9f 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -352,6 +352,31 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("non-empty object with small unsigned integer member") + { + json j = + { + { "entry", std::uint64_t{0x42} } + }; + + std::vector expected = + { + 0x10, 0x00, 0x00, 0x00, // size (little endian) + 0x10, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + 0x42, 0x00, 0x00, 0x00, + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + + // roundtrip + CHECK(json::from_bson(result) == j); + CHECK(json::from_bson(result, true, false) == j); + } + + SECTION("non-empty object with object member") { json j = @@ -534,3 +559,152 @@ TEST_CASE("BSON input/output_adapters") } } } + + + + + +class SaxCountdown +{ + public: + explicit SaxCountdown(const int count) : events_left(count) + {} + + bool null() + { + return events_left-- > 0; + } + + bool boolean(bool) + { + return events_left-- > 0; + } + + bool number_integer(json::number_integer_t) + { + return events_left-- > 0; + } + + bool number_unsigned(json::number_unsigned_t) + { + return events_left-- > 0; + } + + bool number_float(json::number_float_t, const std::string&) + { + return events_left-- > 0; + } + + bool string(std::string&) + { + return events_left-- > 0; + } + + bool start_object(std::size_t) + { + return events_left-- > 0; + } + + bool key(std::string&) + { + return events_left-- > 0; + } + + bool end_object() + { + return events_left-- > 0; + } + + bool start_array(std::size_t) + { + return events_left-- > 0; + } + + bool end_array() + { + return events_left-- > 0; + } + + bool parse_error(std::size_t, const std::string&, const json::exception&) + { + return false; + } + + private: + int events_left = 0; +}; + + +TEST_CASE("Incomplete BSON INPUT") +{ + std::vector incomplete_bson = + { + 0x0D, 0x00, 0x00, 0x00, // size (little endian) + 0x08, // entry: boolean + 'e', 'n', 't' // unexpected EOF + }; + + CHECK_THROWS_WITH(json::from_bson(incomplete_bson), + "[json.exception.parse_error.110] parse error at 9: unexpected end of input"); + CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); + + SaxCountdown scp(0); + CHECK(not json::sax_parse(incomplete_bson, &scp, json::input_format_t::bson)); +} + +TEST_CASE("Incomplete BSON INPUT 2") +{ + std::vector incomplete_bson = + { + 0x0D, 0x00, 0x00, 0x00, // size (little endian) + 0x08, // entry: boolean, unexpected EOF + }; + + CHECK_THROWS_WITH(json::from_bson(incomplete_bson), + "[json.exception.parse_error.110] parse error at 6: unexpected end of input"); + CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); + + SaxCountdown scp(0); + CHECK(not json::sax_parse(incomplete_bson, &scp, json::input_format_t::bson)); +} + + +TEST_CASE("Incomplete BSON INPUT 3") +{ + std::vector incomplete_bson = + { + 0x41, 0x00, 0x00, 0x00, // size (little endian) + 0x04, /// entry: embedded document + 'e', 'n', 't', 'r', 'y', '\x00', + + 0x35, 0x00, 0x00, 0x00, // size (little endian) + 0x10, 0x00, 0x01, 0x00, 0x00, 0x00, + 0x10, 0x00, 0x02, 0x00, 0x00, 0x00 + // missing input data... + }; + CHECK_THROWS_WITH(json::from_bson(incomplete_bson), + "[json.exception.parse_error.110] parse error at 29: unexpected end of input"); + CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); + + SaxCountdown scp(1); + CHECK(not json::sax_parse(incomplete_bson, &scp, json::input_format_t::bson)); +} + + + +TEST_CASE("Incomplete BSON INPUT 4") +{ + std::vector incomplete_bson = + { + 0x0D, 0x00, // size (incomplete), unexpected EOF + }; + + CHECK_THROWS_WITH(json::from_bson(incomplete_bson), + "[json.exception.parse_error.110] parse error at 3: unexpected end of input"); + CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); + + SaxCountdown scp(0); + CHECK(not json::sax_parse(incomplete_bson, &scp, json::input_format_t::bson)); +} + + From 0a09db9cc24fe23e226fd15ced3182068dba06ae Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 29 Sep 2018 11:33:01 +0200 Subject: [PATCH 17/28] BSON: Extend `binary_reader::get_number` to be able to hanlde little endian input to get rid of `binary_reader::get_number_little_endian` --- .../nlohmann/detail/input/binary_reader.hpp | 44 ++++--------------- single_include/nlohmann/json.hpp | 44 ++++--------------- 2 files changed, 16 insertions(+), 72 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 0a95fef5ae..d68a609191 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -177,7 +177,7 @@ class binary_reader case 0x01: // double { double number; - get_number_little_endian(number); + get_number(number); sax->number_float(static_cast(number), ""); } break; @@ -185,7 +185,7 @@ class binary_reader { std::int32_t len; string_t value; - get_number_little_endian(len); + get_number(len); get_string(len - 1ul, value); get(); sax->string(value); @@ -199,14 +199,14 @@ class binary_reader case 0x10: // int32 { std::int32_t value; - get_number_little_endian(value); + get_number(value); sax->number_integer(static_cast(value)); } break; case 0x12: // int64 { std::int64_t value; - get_number_little_endian(value); + get_number(value); sax->number_integer(static_cast(value)); } break; @@ -233,7 +233,7 @@ class binary_reader bool parse_bson_array() { std::int32_t documentSize; - get_number_little_endian(documentSize); + get_number(documentSize); if (JSON_UNLIKELY(not sax->start_array(-1))) { @@ -251,7 +251,7 @@ class binary_reader bool parse_bson_internal() { std::int32_t documentSize; - get_number_little_endian(documentSize); + get_number(documentSize); if (JSON_UNLIKELY(not sax->start_object(-1))) { @@ -1016,7 +1016,7 @@ class binary_reader bytes in CBOR, MessagePack, and UBJSON are stored in network order (big endian) and therefore need reordering on little endian systems. */ - template + template bool get_number(NumberType& result) { // step 1: read input into array with system's byte order @@ -1030,7 +1030,7 @@ class binary_reader } // reverse byte order prior to conversion if necessary - if (is_little_endian) + if (is_little_endian && !InputIsLittleEndian) { vec[sizeof(NumberType) - i - 1] = static_cast(current); } @@ -1045,34 +1045,6 @@ class binary_reader return true; } - template - bool get_number_little_endian(NumberType& result) - { - // step 1: read input into array with system's byte order - std::array vec; - for (std::size_t i = 0; i < sizeof(NumberType); ++i) - { - get(); - if (JSON_UNLIKELY(not unexpect_eof())) - { - return false; - } - - // reverse byte order prior to conversion if necessary - if (!is_little_endian) - { - vec[sizeof(NumberType) - i - 1] = static_cast(current); - } - else - { - vec[i] = static_cast(current); // LCOV_EXCL_LINE - } - } - - // step 2: convert array into number of type T and return - std::memcpy(&result, vec.data(), sizeof(NumberType)); - return true; - } /*! @brief create a string by reading characters from the input diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 3f7cd4e706..ac11591a27 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6161,7 +6161,7 @@ class binary_reader case 0x01: // double { double number; - get_number_little_endian(number); + get_number(number); sax->number_float(static_cast(number), ""); } break; @@ -6169,7 +6169,7 @@ class binary_reader { std::int32_t len; string_t value; - get_number_little_endian(len); + get_number(len); get_string(len - 1ul, value); get(); sax->string(value); @@ -6183,14 +6183,14 @@ class binary_reader case 0x10: // int32 { std::int32_t value; - get_number_little_endian(value); + get_number(value); sax->number_integer(static_cast(value)); } break; case 0x12: // int64 { std::int64_t value; - get_number_little_endian(value); + get_number(value); sax->number_integer(static_cast(value)); } break; @@ -6217,7 +6217,7 @@ class binary_reader bool parse_bson_array() { std::int32_t documentSize; - get_number_little_endian(documentSize); + get_number(documentSize); if (JSON_UNLIKELY(not sax->start_array(-1))) { @@ -6235,7 +6235,7 @@ class binary_reader bool parse_bson_internal() { std::int32_t documentSize; - get_number_little_endian(documentSize); + get_number(documentSize); if (JSON_UNLIKELY(not sax->start_object(-1))) { @@ -7000,7 +7000,7 @@ class binary_reader bytes in CBOR, MessagePack, and UBJSON are stored in network order (big endian) and therefore need reordering on little endian systems. */ - template + template bool get_number(NumberType& result) { // step 1: read input into array with system's byte order @@ -7014,7 +7014,7 @@ class binary_reader } // reverse byte order prior to conversion if necessary - if (is_little_endian) + if (is_little_endian && !InputIsLittleEndian) { vec[sizeof(NumberType) - i - 1] = static_cast(current); } @@ -7029,34 +7029,6 @@ class binary_reader return true; } - template - bool get_number_little_endian(NumberType& result) - { - // step 1: read input into array with system's byte order - std::array vec; - for (std::size_t i = 0; i < sizeof(NumberType); ++i) - { - get(); - if (JSON_UNLIKELY(not unexpect_eof())) - { - return false; - } - - // reverse byte order prior to conversion if necessary - if (!is_little_endian) - { - vec[sizeof(NumberType) - i - 1] = static_cast(current); - } - else - { - vec[i] = static_cast(current); // LCOV_EXCL_LINE - } - } - - // step 2: convert array into number of type T and return - std::memcpy(&result, vec.data(), sizeof(NumberType)); - return true; - } /*! @brief create a string by reading characters from the input From e8730e5e82493d82c9dae8bd73ae6eedc9267de5 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sat, 29 Sep 2018 11:50:01 +0200 Subject: [PATCH 18/28] BSON: Reworked `binary_reader::get_bson_cstr()` --- .../nlohmann/detail/input/binary_reader.hpp | 31 +++++++------------ single_include/nlohmann/json.hpp | 31 +++++++------------ 2 files changed, 22 insertions(+), 40 deletions(-) diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index d68a609191..0b718dd499 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -125,36 +125,27 @@ class binary_reader private: - template - OutputIt generate_until(OutputIt&& d_first, UnaryPredicate&& pred, Gen&& gen) - { - for (auto x = gen(); !pred(x); x = gen()) - { - *d_first++ = x; - } - - return d_first; - } - /*! @return whether array creation completed */ bool get_bson_cstr(string_t& result) { - bool success = true; - generate_until(std::back_inserter(result), [&success](char c) - { - return c == 0x00 || !success; - }, [this, &success] + auto out = std::back_inserter(result); + while (true) { get(); if (JSON_UNLIKELY(not unexpect_eof())) { - success = false; + return false; } - return static_cast(current); - }); - return success; + if (current == 0x00) + { + return true; + } + *out++ = static_cast(current); + } + + return true; } bool parse_bson_entries(bool is_array) diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index ac11591a27..a661ecb6d9 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -6109,36 +6109,27 @@ class binary_reader private: - template - OutputIt generate_until(OutputIt&& d_first, UnaryPredicate&& pred, Gen&& gen) - { - for (auto x = gen(); !pred(x); x = gen()) - { - *d_first++ = x; - } - - return d_first; - } - /*! @return whether array creation completed */ bool get_bson_cstr(string_t& result) { - bool success = true; - generate_until(std::back_inserter(result), [&success](char c) - { - return c == 0x00 || !success; - }, [this, &success] + auto out = std::back_inserter(result); + while (true) { get(); if (JSON_UNLIKELY(not unexpect_eof())) { - success = false; + return false; } - return static_cast(current); - }); - return success; + if (current == 0x00) + { + return true; + } + *out++ = static_cast(current); + } + + return true; } bool parse_bson_entries(bool is_array) From 81f4b34e068df134447c2e13fd05fd4c23f8018f Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sun, 7 Oct 2018 07:52:12 +0200 Subject: [PATCH 19/28] BSON: Improved documentation and error handling/reporting --- include/nlohmann/detail/exceptions.hpp | 1 + .../nlohmann/detail/input/binary_reader.hpp | 179 ++++++++---- .../nlohmann/detail/output/binary_writer.hpp | 2 +- include/nlohmann/json.hpp | 79 +++++- single_include/nlohmann/json.hpp | 261 ++++++++++++++---- test/src/unit-bson.cpp | 19 ++ 6 files changed, 421 insertions(+), 120 deletions(-) diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp index 274a88c7fe..7edc00326a 100644 --- a/include/nlohmann/detail/exceptions.hpp +++ b/include/nlohmann/detail/exceptions.hpp @@ -91,6 +91,7 @@ json.exception.parse_error.109 | parse error: array index 'one' is not a number json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read. json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read. json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read. +json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F | The parsing of the corresponding BSON record type is not implemented (yet). @note For an input with n bytes, 1 is the index of the first character and n+1 is the index of the terminating null byte or the end of file. This also diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 0b718dd499..2b3ff1abe0 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -126,7 +126,12 @@ class binary_reader private: /*! - @return whether array creation completed + @brief Parses a C-style string from the BSON input. + @param [out] result A reference to the string variable where the read string + is to be stored. + @return `true` if the \x00-byte indicating the end of the + string was encountered before the EOF. + `false` indicates an unexpected EOF. */ bool get_bson_cstr(string_t& result) { @@ -148,12 +153,112 @@ class binary_reader return true; } - bool parse_bson_entries(bool is_array) + /*! + @brief Parses a zero-terminated string of length @a len from the BSON input. + @param [in] len The length (including the zero-byte at the end) of the string to be read. + @param [out] result A reference to the string variable where the read string + is to be stored. + @tparam NumberType The type of the length @a len + @pre len > 0 + @return `true` if the string was successfully parsed + */ + template + bool get_bson_string(const NumberType len, string_t& result) + { + return get_string(len - static_cast(1), result) + && get() != std::char_traits::eof(); + } + + /*! + @return A hexadecimal string representation of the given @a byte + @param byte The byte to convert to a string + */ + static std::string byte_hexstring(unsigned char byte) + { + char cr[3]; + snprintf(cr, sizeof(cr), "%02hhX", byte); + return std::string{cr}; + } + + /*! + @brief Read a BSON document element of the given @a element_type. + @param element_type The BSON element type, c.f. http://bsonspec.org/spec.html + @param element_type_parse_position The position in the input stream, where the `element_type` was read. + @warning Not all BSON element types are supported yet. An unsupported @a element_type will + give rise to a parse_error.114: Unsupported BSON record type 0x... + @return whether a valid BSON-object/array was passed to the SAX parser + */ + bool parse_bson_element_internal(int element_type, std::size_t element_type_parse_position) { - while (auto entry_type = get()) + switch (element_type) { + case 0x01: // double + { + double number; + return get_number(number) + && sax->number_float(static_cast(number), ""); + } + case 0x02: // string + { + std::int32_t len; + string_t value; + return get_number(len) + && get_bson_string(len, value) + && sax->string(value); + } + case 0x08: // boolean + { + return sax->boolean(static_cast(get())); + } + case 0x10: // int32 + { + std::int32_t value; + return get_number(value) + && sax->number_integer(static_cast(value)); + } + case 0x12: // int64 + { + std::int64_t value; + return get_number(value) + && sax->number_integer(static_cast(value)); + } + case 0x0A: // null + { + return sax->null(); + } + case 0x03: // object + { + return parse_bson_internal(); + } + case 0x04: // array + { + return parse_bson_array(); + } + default: // anything else not supported (yet) + { + auto element_type_str = byte_hexstring(element_type); + return sax->parse_error(element_type_parse_position, element_type_str, parse_error::create(114, element_type_parse_position, "Unsupported BSON record type 0x" + element_type_str)); + } + } + } + + /*! + @brief Read a BSON element list (as specified in the BSON-spec) from the input + and passes it to the SAX-parser. + The same binary layout is used for objects and arrays, hence it must + be indicated with the argument @a is_array which one is expected + (true --> array, false --> object). + @param is_array Determines if the element list being read is to be treated as + an object (@a is_array == false), or as an array (@a is_array == true). + @return whether a valid BSON-object/array was passed to the SAX parser + */ + bool parse_bson_element_list(bool is_array) + { + while (auto element_type = get()) + { + const std::size_t element_type_parse_position = chars_read; string_t key; - if (!get_bson_cstr(key)) + if (JSON_UNLIKELY(not get_bson_cstr(key))) { return false; } @@ -163,64 +268,18 @@ class binary_reader sax->key(key); } - switch (entry_type) + if (JSON_UNLIKELY(not parse_bson_element_internal(element_type, element_type_parse_position))) { - case 0x01: // double - { - double number; - get_number(number); - sax->number_float(static_cast(number), ""); - } - break; - case 0x02: // string - { - std::int32_t len; - string_t value; - get_number(len); - get_string(len - 1ul, value); - get(); - sax->string(value); - } - break; - case 0x08: // boolean - { - sax->boolean(static_cast(get())); - } - break; - case 0x10: // int32 - { - std::int32_t value; - get_number(value); - sax->number_integer(static_cast(value)); - } - break; - case 0x12: // int64 - { - std::int64_t value; - get_number(value); - sax->number_integer(static_cast(value)); - } - break; - case 0x0A: // null - { - sax->null(); - } - break; - case 0x03: // object - { - parse_bson_internal(); - } - break; - case 0x04: // array - { - parse_bson_array(); - } - break; + return false; } } return true; } + /*! + @brief Reads an array from the BSON input and passes it to the SAX-parser. + @return whether a valid BSON-array was passed to the SAX parser + */ bool parse_bson_array() { std::int32_t documentSize; @@ -231,7 +290,7 @@ class binary_reader return false; } - if (!parse_bson_entries(/*is_array*/true)) + if (JSON_UNLIKELY(not parse_bson_element_list(/*is_array*/true))) { return false; } @@ -239,6 +298,10 @@ class binary_reader return sax->end_array(); } + /*! + @brief Reads in a BSON-object and pass it to the SAX-parser. + @return whether a valid BSON-value was passed to the SAX parser + */ bool parse_bson_internal() { std::int32_t documentSize; @@ -249,7 +312,7 @@ class binary_reader return false; } - if (!parse_bson_entries(/*is_array*/false)) + if (JSON_UNLIKELY(not parse_bson_element_list(/*is_array*/false))) { return false; } diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index d9655f93fd..363bb9b25c 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -868,7 +868,7 @@ class binary_writer switch (j.type()) { default: - JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + JSON_THROW(type_error::create(317, "JSON value of type " + std::to_string(static_cast(j.type())) + " cannot be serialized to requested format")); break; case value_t::discarded: break; diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp index 8b6a017072..c5d2e0dbe8 100644 --- a/include/nlohmann/json.hpp +++ b/include/nlohmann/json.hpp @@ -6591,7 +6591,13 @@ class basic_json } - + /*! + @brief Serializes the given JSON object `j` to BSON and returns a vector + containing the corresponding BSON-representation. + @param j The JSON object to convert to BSON. + @return The BSON representation of the JSON input `j`. + @pre The input `j` shall be an object: `j.is_object() == true` + */ static std::vector to_bson(const basic_json& j) { std::vector result; @@ -6599,11 +6605,21 @@ class basic_json return result; } + /*! + @brief Serializes the given JSON object `j` to BSON and forwards the + corresponding BSON-representation to the given output_adapter `o`. + @param j The JSON object to convert to BSON. + @param o The output adapter that receives the binary BSON representation. + @pre The input `j` shall be an object: `j.is_object() == true` + */ static void to_bson(const basic_json& j, detail::output_adapter o) { binary_writer(o).write_bson(j); } + /*! + @copydoc to_bson(const basic_json&, detail::output_adapter) + */ static void to_bson(const basic_json& j, detail::output_adapter o) { binary_writer(o).write_bson(j); @@ -6804,6 +6820,8 @@ class basic_json related CBOR format @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the related UBJSON format + @sa @ref from_bson(detail::input_adapter, const bool, const bool) for + the related BSON format @since version 2.0.9; parameter @a start_index since 2.1.1; changed to consume input adapters, removed start_index parameter, and added @@ -6889,6 +6907,8 @@ class basic_json related CBOR format @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for the related MessagePack format + @sa @ref from_bson(detail::input_adapter, const bool, const bool) for + the related BSON format @since version 3.1.0; added @allow_exceptions parameter since 3.2.0 */ @@ -6920,7 +6940,61 @@ class basic_json + /*! + @brief Create a JSON value from an input in BSON format + + Deserializes a given input @a i to a JSON value using the BSON (Binary JSON) + serialization format. + + The library maps BSON record types to JSON value types as follows: + + BSON type | BSON marker byte | JSON value type + --------------- | ---------------- | --------------------------- + double | 0x01 | number_float + string | 0x02 | string + document | 0x03 | object + array | 0x04 | array + binary | 0x05 | still unsupported + undefined | 0x06 | still unsupported + ObjectId | 0x07 | still unsupported + boolean | 0x08 | boolean + UTC Date-Time | 0x09 | still unsupported + null | 0x0A | null + Regular Expr. | 0x0B | still unsupported + DB Pointer | 0x0C | still unsupported + JavaScript Code | 0x0D | still unsupported + Symbol | 0x0E | still unsupported + JavaScript Code | 0x0F | still unsupported + int32 | 0x10 | number_integer + Timestamp | 0x11 | still unsupported + 128-bit decimal float | 0x13 | still unsupported + Max Key | 0x7F | still unsupported + Min Key | 0xFF | still unsupported + + + @warning The mapping is **incomplete**. The unsupported mappings + are indicated in the table above. + + @param[in] i an input in BSON format convertible to an input adapter + @param[in] strict whether to expect the input to be consumed until EOF + (true by default) + @param[in] allow_exceptions whether to throw exceptions in case of a + parse error (optional, true by default) + + @return deserialized JSON value + + @throw parse_error.114 if an unsupported BSON record type is encountered + @sa http://bsonspec.org/spec.html + @sa @ref to_bson(const basic_json&, const bool, const bool) for the + analogous serialization + @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the + related CBOR format + @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for + the related MessagePack format + @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the + related UBJSON format + */ static basic_json from_bson(detail::input_adapter&& i, const bool strict = true, const bool allow_exceptions = true) @@ -6931,6 +7005,9 @@ class basic_json return res ? result : basic_json(value_t::discarded); } + /*! + @copydoc from_bson(detail::input_adapter&&, const bool, const bool) + */ template::value, int> = 0> static basic_json from_bson(A1 && a1, A2 && a2, diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index a661ecb6d9..52fd79ca7a 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -690,6 +690,7 @@ json.exception.parse_error.109 | parse error: array index 'one' is not a number json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read. json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read. json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read. +json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F | The parsing of the corresponding BSON record type is not implemented (yet). @note For an input with n bytes, 1 is the index of the first character and n+1 is the index of the terminating null byte or the end of file. This also @@ -6110,7 +6111,12 @@ class binary_reader private: /*! - @return whether array creation completed + @brief Parses a C-style string from the BSON input. + @param [out] result A reference to the string variable where the read string + is to be stored. + @return `true` if the \x00-byte indicating the end of the + string was encountered before the EOF. + `false` indicates an unexpected EOF. */ bool get_bson_cstr(string_t& result) { @@ -6132,12 +6138,112 @@ class binary_reader return true; } - bool parse_bson_entries(bool is_array) + /*! + @brief Parses a zero-terminated string of length @a len from the BSON input. + @param [in] len The length (including the zero-byte at the end) of the string to be read. + @param [out] result A reference to the string variable where the read string + is to be stored. + @tparam NumberType The type of the length @a len + @pre len > 0 + @return `true` if the string was successfully parsed + */ + template + bool get_bson_string(const NumberType len, string_t& result) + { + return get_string(len - static_cast(1), result) + && get() != std::char_traits::eof(); + } + + /*! + @return A hexadecimal string representation of the given @a byte + @param byte The byte to convert to a string + */ + static std::string byte_hexstring(unsigned char byte) + { + char cr[3]; + snprintf(cr, sizeof(cr), "%02hhX", byte); + return std::string{cr}; + } + + /*! + @brief Read a BSON document element of the given @a element_type. + @param element_type The BSON element type, c.f. http://bsonspec.org/spec.html + @param element_type_parse_position The position in the input stream, where the `element_type` was read. + @warning Not all BSON element types are supported yet. An unsupported @a element_type will + give rise to a parse_error.114: Unsupported BSON record type 0x... + @return whether a valid BSON-object/array was passed to the SAX parser + */ + bool parse_bson_element_internal(int element_type, std::size_t element_type_parse_position) + { + switch (element_type) + { + case 0x01: // double + { + double number; + return get_number(number) + && sax->number_float(static_cast(number), ""); + } + case 0x02: // string + { + std::int32_t len; + string_t value; + return get_number(len) + && get_bson_string(len, value) + && sax->string(value); + } + case 0x08: // boolean + { + return sax->boolean(static_cast(get())); + } + case 0x10: // int32 + { + std::int32_t value; + return get_number(value) + && sax->number_integer(static_cast(value)); + } + case 0x12: // int64 + { + std::int64_t value; + return get_number(value) + && sax->number_integer(static_cast(value)); + } + case 0x0A: // null + { + return sax->null(); + } + case 0x03: // object + { + return parse_bson_internal(); + } + case 0x04: // array + { + return parse_bson_array(); + } + default: // anything else not supported (yet) + { + auto element_type_str = byte_hexstring(element_type); + return sax->parse_error(element_type_parse_position, element_type_str, parse_error::create(114, element_type_parse_position, "Unsupported BSON record type 0x" + element_type_str)); + } + } + } + + /*! + @brief Read a BSON element list (as specified in the BSON-spec) from the input + and passes it to the SAX-parser. + The same binary layout is used for objects and arrays, hence it must + be indicated with the argument @a is_array which one is expected + (true --> array, false --> object). + @param is_array Determines if the element list being read is to be treated as + an object (@a is_array == false), or as an array (@a is_array == true). + @return whether a valid BSON-object/array was passed to the SAX parser + */ + bool parse_bson_element_list(bool is_array) { - while (auto entry_type = get()) + while (auto element_type = get()) { + const std::size_t element_type_parse_position = chars_read; string_t key; - if (!get_bson_cstr(key)) + if (JSON_UNLIKELY(not get_bson_cstr(key))) { return false; } @@ -6147,64 +6253,18 @@ class binary_reader sax->key(key); } - switch (entry_type) + if (JSON_UNLIKELY(not parse_bson_element_internal(element_type, element_type_parse_position))) { - case 0x01: // double - { - double number; - get_number(number); - sax->number_float(static_cast(number), ""); - } - break; - case 0x02: // string - { - std::int32_t len; - string_t value; - get_number(len); - get_string(len - 1ul, value); - get(); - sax->string(value); - } - break; - case 0x08: // boolean - { - sax->boolean(static_cast(get())); - } - break; - case 0x10: // int32 - { - std::int32_t value; - get_number(value); - sax->number_integer(static_cast(value)); - } - break; - case 0x12: // int64 - { - std::int64_t value; - get_number(value); - sax->number_integer(static_cast(value)); - } - break; - case 0x0A: // null - { - sax->null(); - } - break; - case 0x03: // object - { - parse_bson_internal(); - } - break; - case 0x04: // array - { - parse_bson_array(); - } - break; + return false; } } return true; } + /*! + @brief Reads an array from the BSON input and passes it to the SAX-parser. + @return whether a valid BSON-array was passed to the SAX parser + */ bool parse_bson_array() { std::int32_t documentSize; @@ -6215,7 +6275,7 @@ class binary_reader return false; } - if (!parse_bson_entries(/*is_array*/true)) + if (JSON_UNLIKELY(not parse_bson_element_list(/*is_array*/true))) { return false; } @@ -6223,6 +6283,10 @@ class binary_reader return sax->end_array(); } + /*! + @brief Reads in a BSON-object and pass it to the SAX-parser. + @return whether a valid BSON-value was passed to the SAX parser + */ bool parse_bson_internal() { std::int32_t documentSize; @@ -6233,7 +6297,7 @@ class binary_reader return false; } - if (!parse_bson_entries(/*is_array*/false)) + if (JSON_UNLIKELY(not parse_bson_element_list(/*is_array*/false))) { return false; } @@ -8691,7 +8755,7 @@ class binary_writer switch (j.type()) { default: - JSON_THROW(type_error::create(317, "JSON value cannot be serialized to requested format")); + JSON_THROW(type_error::create(317, "JSON value of type " + std::to_string(static_cast(j.type())) + " cannot be serialized to requested format")); break; case value_t::discarded: break; @@ -18080,7 +18144,13 @@ class basic_json } - + /*! + @brief Serializes the given JSON object `j` to BSON and returns a vector + containing the corresponding BSON-representation. + @param j The JSON object to convert to BSON. + @return The BSON representation of the JSON input `j`. + @pre The input `j` shall be an object: `j.is_object() == true` + */ static std::vector to_bson(const basic_json& j) { std::vector result; @@ -18088,11 +18158,21 @@ class basic_json return result; } + /*! + @brief Serializes the given JSON object `j` to BSON and forwards the + corresponding BSON-representation to the given output_adapter `o`. + @param j The JSON object to convert to BSON. + @param o The output adapter that receives the binary BSON representation. + @pre The input `j` shall be an object: `j.is_object() == true` + */ static void to_bson(const basic_json& j, detail::output_adapter o) { binary_writer(o).write_bson(j); } + /*! + @copydoc to_bson(const basic_json&, detail::output_adapter) + */ static void to_bson(const basic_json& j, detail::output_adapter o) { binary_writer(o).write_bson(j); @@ -18293,6 +18373,8 @@ class basic_json related CBOR format @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the related UBJSON format + @sa @ref from_bson(detail::input_adapter, const bool, const bool) for + the related BSON format @since version 2.0.9; parameter @a start_index since 2.1.1; changed to consume input adapters, removed start_index parameter, and added @@ -18378,6 +18460,8 @@ class basic_json related CBOR format @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for the related MessagePack format + @sa @ref from_bson(detail::input_adapter, const bool, const bool) for + the related BSON format @since version 3.1.0; added @allow_exceptions parameter since 3.2.0 */ @@ -18409,7 +18493,61 @@ class basic_json + /*! + @brief Create a JSON value from an input in BSON format + + Deserializes a given input @a i to a JSON value using the BSON (Binary JSON) + serialization format. + + The library maps BSON record types to JSON value types as follows: + + BSON type | BSON marker byte | JSON value type + --------------- | ---------------- | --------------------------- + double | 0x01 | number_float + string | 0x02 | string + document | 0x03 | object + array | 0x04 | array + binary | 0x05 | still unsupported + undefined | 0x06 | still unsupported + ObjectId | 0x07 | still unsupported + boolean | 0x08 | boolean + UTC Date-Time | 0x09 | still unsupported + null | 0x0A | null + Regular Expr. | 0x0B | still unsupported + DB Pointer | 0x0C | still unsupported + JavaScript Code | 0x0D | still unsupported + Symbol | 0x0E | still unsupported + JavaScript Code | 0x0F | still unsupported + int32 | 0x10 | number_integer + Timestamp | 0x11 | still unsupported + 128-bit decimal float | 0x13 | still unsupported + Max Key | 0x7F | still unsupported + Min Key | 0xFF | still unsupported + + + @warning The mapping is **incomplete**. The unsupported mappings + are indicated in the table above. + + @param[in] i an input in BSON format convertible to an input adapter + @param[in] strict whether to expect the input to be consumed until EOF + (true by default) + @param[in] allow_exceptions whether to throw exceptions in case of a + parse error (optional, true by default) + + @return deserialized JSON value + + @throw parse_error.114 if an unsupported BSON record type is encountered + @sa http://bsonspec.org/spec.html + @sa @ref to_bson(const basic_json&, const bool, const bool) for the + analogous serialization + @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the + related CBOR format + @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for + the related MessagePack format + @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the + related UBJSON format + */ static basic_json from_bson(detail::input_adapter&& i, const bool strict = true, const bool allow_exceptions = true) @@ -18420,6 +18558,9 @@ class basic_json return res ? result : basic_json(value_t::discarded); } + /*! + @copydoc from_bson(detail::input_adapter&&, const bool, const bool) + */ template::value, int> = 0> static basic_json from_bson(A1 && a1, A2 && a2, diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index cbb6785e9f..33ef25c435 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -708,3 +708,22 @@ TEST_CASE("Incomplete BSON INPUT 4") } +TEST_CASE("Unsupported BSON input") +{ + std::vector bson = + { + 0x0C, 0x00, 0x00, 0x00, // size (little endian) + 0xFF, // entry type: Min key (not supported yet) + 'e', 'n', 't', 'r', 'y', '\x00', + 0x00 // end marker + }; + + CHECK_THROWS_WITH(json::from_bson(bson), + "[json.exception.parse_error.114] parse error at 5: Unsupported BSON record type 0xFF"); + CHECK(json::from_bson(bson, true, false).is_discarded()); + + SaxCountdown scp(0); + CHECK(not json::sax_parse(bson, &scp, json::input_format_t::bson)); +} + + From 062aeaf7b654f1573c57929d229861845031185b Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sun, 7 Oct 2018 17:57:13 +0200 Subject: [PATCH 20/28] BSON: Reworked the `binary_writer` such that it precomputes the size of the BSON-output. This way, the output_adapter can work on simple output iterators and no longer requires random access iterators. --- .../nlohmann/detail/output/binary_writer.hpp | 323 ++++++++------ .../detail/output/output_adapters.hpp | 43 -- include/nlohmann/json.hpp | 43 +- single_include/nlohmann/json.hpp | 409 ++++++++++-------- test/src/unit-alt-string.cpp | 10 - 5 files changed, 466 insertions(+), 362 deletions(-) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 363bb9b25c..bce5116dcc 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -9,6 +9,7 @@ #include #include + namespace nlohmann { namespace detail @@ -676,187 +677,278 @@ class binary_writer } } - std::size_t write_bson_boolean(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @return The size of a BSON document entry header, including the id marker and the entry name size (and its null-terminator). + */ + static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - oa->write_character(static_cast(0x08)); // boolean - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - oa->write_character(j.m_value.boolean ? static_cast(0x01) : static_cast(0x00)); - return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; + return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; } - std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes the given @a element_type and @a name to the output adapter + */ + void write_bson_entry_header(const typename BasicJsonType::string_t& name, std::uint8_t element_type) { - oa->write_character(static_cast(0x01)); // double + oa->write_character(static_cast(element_type)); // boolean oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number(j.m_value.number_float); - return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } - std::size_t write_bson_string(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and boolean value @a value + */ + void write_bson_boolean(const typename BasicJsonType::string_t& name, const bool value) { - oa->write_character(static_cast(0x02)); // string (UTF-8) - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + write_bson_entry_header(name, 0x08); + oa->write_character(value ? static_cast(0x01) : static_cast(0x00)); + } - write_number(static_cast(j.m_value.string->size() + 1ul)); - oa->write_characters( - reinterpret_cast(j.m_value.string->c_str()), - j.m_value.string->size() + 1); + /*! + @brief Writes a BSON element with key @a name and double value @a value + */ + void write_bson_double(const typename BasicJsonType::string_t& name, const double value) + { + write_bson_entry_header(name, 0x01); + write_number(value); + } - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; + /*! + @return The size of the BSON-encoded string in @a value + */ + static std::size_t calc_bson_string_size(const typename BasicJsonType::string_t& value) + { + return sizeof(std::int32_t) + value.size() + 1ul; } - std::size_t write_bson_null(const typename BasicJsonType::string_t& name, const BasicJsonType&) + /*! + @brief Writes a BSON element with key @a name and string value @a value + */ + void write_bson_string(const typename BasicJsonType::string_t& name, const typename BasicJsonType::string_t& value) { - oa->write_character(static_cast(0x0A)); // null + write_bson_entry_header(name, 0x02); + + write_number(static_cast(value.size() + 1ul)); oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + reinterpret_cast(value.c_str()), + value.size() + 1); + } - return /*id*/ 1ul + name.size() + 1ul; + /*! + @brief Writes a BSON element with key @a name and null value + */ + void write_bson_null(const typename BasicJsonType::string_t& name) + { + write_bson_entry_header(name, 0x0A); } - std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @return The size of the BSON-encoded integer @a value + */ + static std::size_t calc_bson_integer_size(const std::int64_t value) { - auto n = j.m_value.number_integer; - if ((std::numeric_limits::min)() <= n and n <= (std::numeric_limits::max)()) + if ((std::numeric_limits::min)() <= value and value <= (std::numeric_limits::max)()) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(n)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + return sizeof(std::int32_t); } else { - oa->write_character(static_cast(0x12)); // int64 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(j.m_value.number_integer)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + return sizeof(std::int64_t); } } - std::size_t write_bson_unsigned(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and integer @a value + */ + void write_bson_integer(const typename BasicJsonType::string_t& name, const std::int64_t value) { - auto n = j.m_value.number_integer; - if (n <= static_cast((std::numeric_limits::max)())) + if ((std::numeric_limits::min)() <= value and value <= (std::numeric_limits::max)()) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(n)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + write_bson_entry_header(name, 0x10); // int32 + write_number(static_cast(value)); } else { - oa->write_character(static_cast(0x12)); // int64 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + write_bson_entry_header(name, 0x12); // int64 + write_number(static_cast(value)); + } + } - write_number(static_cast(j.m_value.number_integer)); - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + /*! + @return The size of the BSON-encoded unsigned integer in @a j + */ + static std::size_t calc_bson_unsigned_size(const std::uint64_t value) + { + if (value <= static_cast((std::numeric_limits::max)())) + { + return sizeof(std::int32_t); + } + else + { + return sizeof(std::int64_t); } } - std::size_t write_bson_object_internal(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and unsigned @a value + */ + void write_bson_unsigned(const typename BasicJsonType::string_t& name, const std::uint64_t value) { - oa->write_character(static_cast(0x03)); // object - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - auto const embedded_document_size = write_bson_object(j); + if (value <= static_cast((std::numeric_limits::max)())) + { + write_bson_entry_header(name, 0x10); // int32 + write_number(static_cast(value)); + } + else + { + write_bson_entry_header(name, 0x12); // int64 + write_number(static_cast(value)); + } + } - return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + /*! + @brief Writes a BSON element with key @a name and object @a value + */ + void write_bson_object_entry(const typename BasicJsonType::string_t& name, const typename BasicJsonType::object_t& value) + { + write_bson_entry_header(name, 0x03); // object + write_bson_object(value); } - std::size_t write_bson_array(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + + /*! + @return The size of the BSON-encoded array @a value + */ + static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value) { - oa->write_character(static_cast(0x04)); // object - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + std::size_t embedded_document_size = 0ul; + for (const auto& el : value) + { + embedded_document_size += calc_bson_element_size("", el); + } - auto document_size_offset = oa->reserve_characters(4ul); - std::int32_t embedded_document_size = 5ul; + return sizeof(std::int32_t) + embedded_document_size + 1ul; + } + + /*! + @brief Writes a BSON element with key @a name and array @a value + */ + void write_bson_array(const typename BasicJsonType::string_t& name, const typename BasicJsonType::array_t& value) + { + write_bson_entry_header(name, 0x04); // array + write_number(calc_bson_array_size(value)); - for (const auto& el : *j.m_value.array) + for (const auto& el : value) { - embedded_document_size += write_bson_object_entry("", el); + write_bson_element("", el); } oa->write_character(static_cast(0x00)); - write_number_at(document_size_offset, embedded_document_size); + } + - return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + /*! + @brief Calculates the size necessary to serialize the JSON value @a j with its @a name + @return The calculated size for the BSON document entry for @a j with the given @a name. + */ + static std::size_t calc_bson_element_size(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + const auto header_size = calc_bson_entry_header_size(name); + switch (j.type()) + { + // LCOV_EXCL_START + default: + assert(false); + return 0ul; + // LCOV_EXCL_STOP + case value_t::object: + return header_size + calc_bson_object_size(*j.m_value.object); + case value_t::array: + return header_size + calc_bson_array_size(*j.m_value.array); + case value_t::boolean: + return header_size + 1ul; + case value_t::number_float: + return header_size + 8ul; + case value_t::number_integer: + return header_size + calc_bson_integer_size(j.m_value.number_integer); + case value_t::number_unsigned: + return header_size + calc_bson_unsigned_size(j.m_value.number_unsigned); + case value_t::string: + return header_size + calc_bson_string_size(*j.m_value.string); + case value_t::null: + return header_size + 0ul; + }; } - std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + + /*! + @brief Serializes the JSON value @a j to BSON and associates it with the key @a name. + @param name The name to associate with the JSON entity @a j within the current BSON document + @return The size of the bson entry + */ + void write_bson_element(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) { // LCOV_EXCL_START default: assert(false); - break; + return; // LCOV_EXCL_STOP case value_t::object: - return write_bson_object_internal(name, j); + return write_bson_object_entry(name, *j.m_value.object); case value_t::array: - return write_bson_array(name, j); + return write_bson_array(name, *j.m_value.array); case value_t::boolean: - return write_bson_boolean(name, j); + return write_bson_boolean(name, j.m_value.boolean); case value_t::number_float: - return write_bson_double(name, j); + return write_bson_double(name, j.m_value.number_float); case value_t::number_integer: - return write_bson_integer(name, j); + return write_bson_integer(name, j.m_value.number_integer); case value_t::number_unsigned: - return write_bson_unsigned(name, j); + return write_bson_unsigned(name, j.m_value.number_unsigned); case value_t::string: - return write_bson_string(name, j); + return write_bson_string(name, *j.m_value.string); case value_t::null: - return write_bson_null(name, j); + return write_bson_null(name); }; + } - return 0ul; + /*! + @brief Calculates the size of the BSON serialization of the given + JSON-object @a j. + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + static std::size_t calc_bson_object_size(const typename BasicJsonType::object_t& value) + { + std::size_t document_size = 0; + + for (const auto& el : value) + { + document_size += calc_bson_element_size(el.first, el.second); + } + + return sizeof(std::int32_t) + document_size + 1ul; } /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object */ - std::size_t write_bson_object(const BasicJsonType& j) + void write_bson_object(const typename BasicJsonType::object_t& value) { - assert(j.type() == value_t::object); - auto document_size_offset = oa->reserve_characters(4ul); - std::int32_t document_size = 5ul; + write_number(calc_bson_object_size(value)); - for (const auto& el : *j.m_value.object) + for (const auto& el : value) { - document_size += write_bson_object_entry(el.first, el.second); + write_bson_element(el.first, el.second); } oa->write_character(static_cast(0x00)); - write_number_at(document_size_offset, document_size); - return document_size; } /*! @@ -873,7 +965,7 @@ class binary_writer case value_t::discarded: break; case value_t::object: - write_bson_object(j); + write_bson_object(*j.m_value.object); break; } } @@ -909,35 +1001,6 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } - /* - @brief write a number to output in little endian format - - @param[in] offset The offset where to start writing - @param[in] n number of type @a NumberType - @tparam NumberType the type of the number - @tparam OutputIsLittleEndian Set to true if output data is - required to be little endian - */ - template - void write_number_at(std::size_t offset, const NumberType n) - { - // step 1: write number to array of length NumberType - std::array vec; - std::memcpy(vec.data(), &n, sizeof(NumberType)); - - // step 2: write array to output (with possible reordering) - // LCOV_EXCL_START - if (is_little_endian && !OutputIsLittleEndian) - { - // reverse byte order prior to conversion if necessary - std::reverse(vec.begin(), vec.end()); - } - // LCOV_EXCL_STOP - - oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); - } - - // UBJSON: write number (floating point) template::value, int>::type = 0> diff --git a/include/nlohmann/detail/output/output_adapters.hpp b/include/nlohmann/detail/output/output_adapters.hpp index 64960011af..ff86a6e19f 100644 --- a/include/nlohmann/detail/output/output_adapters.hpp +++ b/include/nlohmann/detail/output/output_adapters.hpp @@ -18,8 +18,6 @@ template struct output_adapter_protocol { virtual void write_character(CharType c) = 0; virtual void write_characters(const CharType* s, std::size_t length) = 0; - virtual void write_characters_at(std::size_t position, const CharType* s, std::size_t length) = 0; - virtual std::size_t reserve_characters(std::size_t length) = 0; virtual ~output_adapter_protocol() = default; }; @@ -44,18 +42,6 @@ class output_vector_adapter : public output_adapter_protocol std::copy(s, s + length, std::back_inserter(v)); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - std::copy(s, s + length, std::begin(v) + position); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = v.size(); - std::fill_n(std::back_inserter(v), length, static_cast(0x00)); - return position; - } - private: std::vector& v; }; @@ -77,22 +63,6 @@ class output_stream_adapter : public output_adapter_protocol stream.write(s, static_cast(length)); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - const auto orig_offset = stream.tellp(); - stream.seekp(static_cast::pos_type>(position)); - stream.write(s, static_cast(length)); - stream.seekp(orig_offset); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = stream.tellp(); - std::vector empty(length, static_cast(0)); - stream.write(empty.data(), length); - return static_cast(position); - } - private: std::basic_ostream& stream; }; @@ -114,19 +84,6 @@ class output_string_adapter : public output_adapter_protocol str.append(s, length); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - std::copy(s, s + length, std::begin(str) + position); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = str.size(); - std::fill_n(std::back_inserter(str), length, static_cast(0x00)); - return position; - } - - private: StringType& str; }; diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp index c5d2e0dbe8..1b61e99503 100644 --- a/include/nlohmann/json.hpp +++ b/include/nlohmann/json.hpp @@ -6594,9 +6594,45 @@ class basic_json /*! @brief Serializes the given JSON object `j` to BSON and returns a vector containing the corresponding BSON-representation. - @param j The JSON object to convert to BSON. - @return The BSON representation of the JSON input `j`. - @pre The input `j` shall be an object: `j.is_object() == true` + + BSON (Binary JSON) is a binary format in which zero or more ordered key/value pairs are + stored as a single entity (a so-called document). + + The library uses the following mapping from JSON values types to BSON types: + + JSON value type | value/range | BSON type | marker + --------------- | --------------------------------- | ----------- | ------ + null | `null` | null | 0x0A + boolean | `true`, `false` | boolean | 0x08 + number_integer | -9223372036854775808..-2147483649 | int64 | 0x12 + number_integer | -2147483648..2147483647 | int32 | 0x10 + number_integer | 2147483648..9223372036854775807 | int64 | 0x12 + number_unsigned | 0..2147483647 | int32 | 0x10 + number_unsigned | 2147483648..9223372036854775807 | int64 | 0x12 + number_float | *any value* | double | 0x01 + string | *any value* | string | 0x02 + array | *any value* | document | 0x04 + object | *any value* | document | 0x03 + + @warning The mapping is **incomplete**, since only JSON-objects (and things + contained therein) can be serialized to BSON. + + @pre The input `j` is required to be an object: `j.is_object() == true` + + @note Any BSON output created via @ref to_bson can be successfully parsed + by @ref from_bson. + + @param[in] j JSON value to serialize + @return BSON serialization as byte vector + + @complexity Linear in the size of the JSON value @a j. + + @sa http://bsonspec.org/spec.html + @sa @ref from_bson(detail::input_adapter, const bool strict) for the + analogous deserialization + @sa @ref to_ubjson(const basic_json&) for the related UBJSON format + @sa @ref to_cbor(const basic_json&) for the related CBOR format + @sa @ref to_msgpack(const basic_json&) for the related MessagePack format */ static std::vector to_bson(const basic_json& j) { @@ -6611,6 +6647,7 @@ class basic_json @param j The JSON object to convert to BSON. @param o The output adapter that receives the binary BSON representation. @pre The input `j` shall be an object: `j.is_object() == true` + @sa @ref to_bson(const basic_json&) */ static void to_bson(const basic_json& j, detail::output_adapter o) { diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 52fd79ca7a..48b17d17db 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -5839,8 +5839,6 @@ template struct output_adapter_protocol { virtual void write_character(CharType c) = 0; virtual void write_characters(const CharType* s, std::size_t length) = 0; - virtual void write_characters_at(std::size_t position, const CharType* s, std::size_t length) = 0; - virtual std::size_t reserve_characters(std::size_t length) = 0; virtual ~output_adapter_protocol() = default; }; @@ -5865,18 +5863,6 @@ class output_vector_adapter : public output_adapter_protocol std::copy(s, s + length, std::back_inserter(v)); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - std::copy(s, s + length, std::begin(v) + position); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = v.size(); - std::fill_n(std::back_inserter(v), length, static_cast(0x00)); - return position; - } - private: std::vector& v; }; @@ -5898,22 +5884,6 @@ class output_stream_adapter : public output_adapter_protocol stream.write(s, static_cast(length)); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - const auto orig_offset = stream.tellp(); - stream.seekp(static_cast::pos_type>(position)); - stream.write(s, static_cast(length)); - stream.seekp(orig_offset); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = stream.tellp(); - std::vector empty(length, static_cast(0)); - stream.write(empty.data(), length); - return static_cast(position); - } - private: std::basic_ostream& stream; }; @@ -5935,19 +5905,6 @@ class output_string_adapter : public output_adapter_protocol str.append(s, length); } - void write_characters_at(std::size_t position, const CharType* s, std::size_t length) override - { - std::copy(s, s + length, std::begin(str) + position); - } - - std::size_t reserve_characters(std::size_t length) override - { - const auto position = str.size(); - std::fill_n(std::back_inserter(str), length, static_cast(0x00)); - return position; - } - - private: StringType& str; }; @@ -7896,6 +7853,7 @@ class binary_reader // #include + namespace nlohmann { namespace detail @@ -8563,187 +8521,278 @@ class binary_writer } } - std::size_t write_bson_boolean(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @return The size of a BSON document entry header, including the id marker and the entry name size (and its null-terminator). + */ + static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - oa->write_character(static_cast(0x08)); // boolean - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - oa->write_character(j.m_value.boolean ? static_cast(0x01) : static_cast(0x00)); - return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u; + return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; } - std::size_t write_bson_double(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes the given @a element_type and @a name to the output adapter + */ + void write_bson_entry_header(const typename BasicJsonType::string_t& name, std::uint8_t element_type) { - oa->write_character(static_cast(0x01)); // double + oa->write_character(static_cast(element_type)); // boolean oa->write_characters( reinterpret_cast(name.c_str()), name.size() + 1u); - write_number(j.m_value.number_float); - return /*id*/ 1ul + name.size() + 1u + /*double value*/ 8u; } - std::size_t write_bson_string(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and boolean value @a value + */ + void write_bson_boolean(const typename BasicJsonType::string_t& name, const bool value) { - oa->write_character(static_cast(0x02)); // string (UTF-8) - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + write_bson_entry_header(name, 0x08); + oa->write_character(value ? static_cast(0x01) : static_cast(0x00)); + } - write_number(static_cast(j.m_value.string->size() + 1ul)); - oa->write_characters( - reinterpret_cast(j.m_value.string->c_str()), - j.m_value.string->size() + 1); + /*! + @brief Writes a BSON element with key @a name and double value @a value + */ + void write_bson_double(const typename BasicJsonType::string_t& name, const double value) + { + write_bson_entry_header(name, 0x01); + write_number(value); + } - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t) + j.m_value.string->size() + 1ul; + /*! + @return The size of the BSON-encoded string in @a value + */ + static std::size_t calc_bson_string_size(const typename BasicJsonType::string_t& value) + { + return sizeof(std::int32_t) + value.size() + 1ul; } - std::size_t write_bson_null(const typename BasicJsonType::string_t& name, const BasicJsonType&) + /*! + @brief Writes a BSON element with key @a name and string value @a value + */ + void write_bson_string(const typename BasicJsonType::string_t& name, const typename BasicJsonType::string_t& value) { - oa->write_character(static_cast(0x0A)); // null + write_bson_entry_header(name, 0x02); + + write_number(static_cast(value.size() + 1ul)); oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + reinterpret_cast(value.c_str()), + value.size() + 1); + } - return /*id*/ 1ul + name.size() + 1ul; + /*! + @brief Writes a BSON element with key @a name and null value + */ + void write_bson_null(const typename BasicJsonType::string_t& name) + { + write_bson_entry_header(name, 0x0A); } - std::size_t write_bson_integer(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @return The size of the BSON-encoded integer @a value + */ + static std::size_t calc_bson_integer_size(const std::int64_t value) { - auto n = j.m_value.number_integer; - if ((std::numeric_limits::min)() <= n and n <= (std::numeric_limits::max)()) + if ((std::numeric_limits::min)() <= value and value <= (std::numeric_limits::max)()) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(n)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + return sizeof(std::int32_t); } else { - oa->write_character(static_cast(0x12)); // int64 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(j.m_value.number_integer)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + return sizeof(std::int64_t); } } - std::size_t write_bson_unsigned(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and integer @a value + */ + void write_bson_integer(const typename BasicJsonType::string_t& name, const std::int64_t value) { - auto n = j.m_value.number_integer; - if (n <= static_cast((std::numeric_limits::max)())) + if ((std::numeric_limits::min)() <= value and value <= (std::numeric_limits::max)()) { - oa->write_character(static_cast(0x10)); // int32 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - write_number(static_cast(n)); - - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int32_t); + write_bson_entry_header(name, 0x10); // int32 + write_number(static_cast(value)); } else { - oa->write_character(static_cast(0x12)); // int64 - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + write_bson_entry_header(name, 0x12); // int64 + write_number(static_cast(value)); + } + } - write_number(static_cast(j.m_value.number_integer)); - return /*id*/ 1ul + name.size() + 1ul + sizeof(std::int64_t); + /*! + @return The size of the BSON-encoded unsigned integer in @a j + */ + static std::size_t calc_bson_unsigned_size(const std::uint64_t value) + { + if (value <= static_cast((std::numeric_limits::max)())) + { + return sizeof(std::int32_t); + } + else + { + return sizeof(std::int64_t); } } - std::size_t write_bson_object_internal(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + /*! + @brief Writes a BSON element with key @a name and unsigned @a value + */ + void write_bson_unsigned(const typename BasicJsonType::string_t& name, const std::uint64_t value) { - oa->write_character(static_cast(0x03)); // object - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); - - auto const embedded_document_size = write_bson_object(j); + if (value <= static_cast((std::numeric_limits::max)())) + { + write_bson_entry_header(name, 0x10); // int32 + write_number(static_cast(value)); + } + else + { + write_bson_entry_header(name, 0x12); // int64 + write_number(static_cast(value)); + } + } - return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + /*! + @brief Writes a BSON element with key @a name and object @a value + */ + void write_bson_object_entry(const typename BasicJsonType::string_t& name, const typename BasicJsonType::object_t& value) + { + write_bson_entry_header(name, 0x03); // object + write_bson_object(value); } - std::size_t write_bson_array(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + + /*! + @return The size of the BSON-encoded array @a value + */ + static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value) { - oa->write_character(static_cast(0x04)); // object - oa->write_characters( - reinterpret_cast(name.c_str()), - name.size() + 1u); + std::size_t embedded_document_size = 0ul; + for (const auto& el : value) + { + embedded_document_size += calc_bson_element_size("", el); + } + + return sizeof(std::int32_t) + embedded_document_size + 1ul; + } - auto document_size_offset = oa->reserve_characters(4ul); - std::int32_t embedded_document_size = 5ul; + /*! + @brief Writes a BSON element with key @a name and array @a value + */ + void write_bson_array(const typename BasicJsonType::string_t& name, const typename BasicJsonType::array_t& value) + { + write_bson_entry_header(name, 0x04); // array + write_number(calc_bson_array_size(value)); - for (const auto& el : *j.m_value.array) + for (const auto& el : value) { - embedded_document_size += write_bson_object_entry("", el); + write_bson_element("", el); } oa->write_character(static_cast(0x00)); - write_number_at(document_size_offset, embedded_document_size); + } + - return /*id*/ 1ul + name.size() + 1ul + embedded_document_size; + /*! + @brief Calculates the size necessary to serialize the JSON value @a j with its @a name + @return The calculated size for the BSON document entry for @a j with the given @a name. + */ + static std::size_t calc_bson_element_size(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + { + const auto header_size = calc_bson_entry_header_size(name); + switch (j.type()) + { + // LCOV_EXCL_START + default: + assert(false); + return 0ul; + // LCOV_EXCL_STOP + case value_t::object: + return header_size + calc_bson_object_size(*j.m_value.object); + case value_t::array: + return header_size + calc_bson_array_size(*j.m_value.array); + case value_t::boolean: + return header_size + 1ul; + case value_t::number_float: + return header_size + 8ul; + case value_t::number_integer: + return header_size + calc_bson_integer_size(j.m_value.number_integer); + case value_t::number_unsigned: + return header_size + calc_bson_unsigned_size(j.m_value.number_unsigned); + case value_t::string: + return header_size + calc_bson_string_size(*j.m_value.string); + case value_t::null: + return header_size + 0ul; + }; } - std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j) + + /*! + @brief Serializes the JSON value @a j to BSON and associates it with the key @a name. + @param name The name to associate with the JSON entity @a j within the current BSON document + @return The size of the bson entry + */ + void write_bson_element(const typename BasicJsonType::string_t& name, const BasicJsonType& j) { switch (j.type()) { // LCOV_EXCL_START default: assert(false); - break; + return; // LCOV_EXCL_STOP case value_t::object: - return write_bson_object_internal(name, j); + return write_bson_object_entry(name, *j.m_value.object); case value_t::array: - return write_bson_array(name, j); + return write_bson_array(name, *j.m_value.array); case value_t::boolean: - return write_bson_boolean(name, j); + return write_bson_boolean(name, j.m_value.boolean); case value_t::number_float: - return write_bson_double(name, j); + return write_bson_double(name, j.m_value.number_float); case value_t::number_integer: - return write_bson_integer(name, j); + return write_bson_integer(name, j.m_value.number_integer); case value_t::number_unsigned: - return write_bson_unsigned(name, j); + return write_bson_unsigned(name, j.m_value.number_unsigned); case value_t::string: - return write_bson_string(name, j); + return write_bson_string(name, *j.m_value.string); case value_t::null: - return write_bson_null(name, j); + return write_bson_null(name); }; + } + + /*! + @brief Calculates the size of the BSON serialization of the given + JSON-object @a j. + @param[in] j JSON value to serialize + @pre j.type() == value_t::object + */ + static std::size_t calc_bson_object_size(const typename BasicJsonType::object_t& value) + { + std::size_t document_size = 0; + + for (const auto& el : value) + { + document_size += calc_bson_element_size(el.first, el.second); + } - return 0ul; + return sizeof(std::int32_t) + document_size + 1ul; } /*! @param[in] j JSON value to serialize @pre j.type() == value_t::object */ - std::size_t write_bson_object(const BasicJsonType& j) + void write_bson_object(const typename BasicJsonType::object_t& value) { - assert(j.type() == value_t::object); - auto document_size_offset = oa->reserve_characters(4ul); - std::int32_t document_size = 5ul; + write_number(calc_bson_object_size(value)); - for (const auto& el : *j.m_value.object) + for (const auto& el : value) { - document_size += write_bson_object_entry(el.first, el.second); + write_bson_element(el.first, el.second); } oa->write_character(static_cast(0x00)); - write_number_at(document_size_offset, document_size); - return document_size; } /*! @@ -8760,7 +8809,7 @@ class binary_writer case value_t::discarded: break; case value_t::object: - write_bson_object(j); + write_bson_object(*j.m_value.object); break; } } @@ -8796,35 +8845,6 @@ class binary_writer oa->write_characters(vec.data(), sizeof(NumberType)); } - /* - @brief write a number to output in little endian format - - @param[in] offset The offset where to start writing - @param[in] n number of type @a NumberType - @tparam NumberType the type of the number - @tparam OutputIsLittleEndian Set to true if output data is - required to be little endian - */ - template - void write_number_at(std::size_t offset, const NumberType n) - { - // step 1: write number to array of length NumberType - std::array vec; - std::memcpy(vec.data(), &n, sizeof(NumberType)); - - // step 2: write array to output (with possible reordering) - // LCOV_EXCL_START - if (is_little_endian && !OutputIsLittleEndian) - { - // reverse byte order prior to conversion if necessary - std::reverse(vec.begin(), vec.end()); - } - // LCOV_EXCL_STOP - - oa->write_characters_at(offset, vec.data(), sizeof(NumberType)); - } - - // UBJSON: write number (floating point) template::value, int>::type = 0> @@ -18147,9 +18167,45 @@ class basic_json /*! @brief Serializes the given JSON object `j` to BSON and returns a vector containing the corresponding BSON-representation. - @param j The JSON object to convert to BSON. - @return The BSON representation of the JSON input `j`. - @pre The input `j` shall be an object: `j.is_object() == true` + + BSON (Binary JSON) is a binary format in which zero or more ordered key/value pairs are + stored as a single entity (a so-called document). + + The library uses the following mapping from JSON values types to BSON types: + + JSON value type | value/range | BSON type | marker + --------------- | --------------------------------- | ----------- | ------ + null | `null` | null | 0x0A + boolean | `true`, `false` | boolean | 0x08 + number_integer | -9223372036854775808..-2147483649 | int64 | 0x12 + number_integer | -2147483648..2147483647 | int32 | 0x10 + number_integer | 2147483648..9223372036854775807 | int64 | 0x12 + number_unsigned | 0..2147483647 | int32 | 0x10 + number_unsigned | 2147483648..9223372036854775807 | int64 | 0x12 + number_float | *any value* | double | 0x01 + string | *any value* | string | 0x02 + array | *any value* | document | 0x04 + object | *any value* | document | 0x03 + + @warning The mapping is **incomplete**, since only JSON-objects (and things + contained therein) can be serialized to BSON. + + @pre The input `j` is required to be an object: `j.is_object() == true` + + @note Any BSON output created via @ref to_bson can be successfully parsed + by @ref from_bson. + + @param[in] j JSON value to serialize + @return BSON serialization as byte vector + + @complexity Linear in the size of the JSON value @a j. + + @sa http://bsonspec.org/spec.html + @sa @ref from_bson(detail::input_adapter, const bool strict) for the + analogous deserialization + @sa @ref to_ubjson(const basic_json&) for the related UBJSON format + @sa @ref to_cbor(const basic_json&) for the related CBOR format + @sa @ref to_msgpack(const basic_json&) for the related MessagePack format */ static std::vector to_bson(const basic_json& j) { @@ -18164,6 +18220,7 @@ class basic_json @param j The JSON object to convert to BSON. @param o The output adapter that receives the binary BSON representation. @pre The input `j` shall be an object: `j.is_object() == true` + @sa @ref to_bson(const basic_json&) */ static void to_bson(const basic_json& j, detail::output_adapter o) { diff --git a/test/src/unit-alt-string.cpp b/test/src/unit-alt-string.cpp index d866ed703c..356835c013 100644 --- a/test/src/unit-alt-string.cpp +++ b/test/src/unit-alt-string.cpp @@ -102,16 +102,6 @@ class alt_string str_impl.resize(n, c); } - auto begin() -> std::string::iterator - { - return str_impl.begin(); - } - - auto end() -> std::string::iterator - { - return str_impl.end(); - } - template bool operator<(const op_type& op) const { From df0f612d1b32f04a191078db75c8f3deb4655cdb Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Sun, 7 Oct 2018 20:08:05 +0200 Subject: [PATCH 21/28] BSON: allow and discard values and object entries of type `value_t::discarded` --- .../nlohmann/detail/output/binary_writer.hpp | 5 +++- single_include/nlohmann/json.hpp | 5 +++- test/src/unit-bson.cpp | 25 +++++++++++++++++++ 3 files changed, 33 insertions(+), 2 deletions(-) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index bce5116dcc..0ec237eaf3 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -9,7 +9,6 @@ #include #include - namespace nlohmann { namespace detail @@ -864,6 +863,8 @@ class binary_writer assert(false); return 0ul; // LCOV_EXCL_STOP + case value_t::discarded: + return 0ul; case value_t::object: return header_size + calc_bson_object_size(*j.m_value.object); case value_t::array: @@ -898,6 +899,8 @@ class binary_writer assert(false); return; // LCOV_EXCL_STOP + case value_t::discarded: + return; case value_t::object: return write_bson_object_entry(name, *j.m_value.object); case value_t::array: diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 48b17d17db..98c6b1f184 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -7853,7 +7853,6 @@ class binary_reader // #include - namespace nlohmann { namespace detail @@ -8708,6 +8707,8 @@ class binary_writer assert(false); return 0ul; // LCOV_EXCL_STOP + case value_t::discarded: + return 0ul; case value_t::object: return header_size + calc_bson_object_size(*j.m_value.object); case value_t::array: @@ -8742,6 +8743,8 @@ class binary_writer assert(false); return; // LCOV_EXCL_STOP + case value_t::discarded: + return; case value_t::object: return write_bson_object_entry(name, *j.m_value.object); case value_t::array: diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 33ef25c435..4a1b387e48 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -376,6 +376,31 @@ TEST_CASE("BSON") CHECK(json::from_bson(result, true, false) == j); } + SECTION("discarded values are not serialized") + { + json j = json::value_t::discarded; + const auto result = json::to_bson(j); + CHECK(result.empty()); + } + + SECTION("discarded members are not serialized") + { + json j = + { + { "entry", json::value_t::discarded } + }; + + std::vector expected = + { + 0x05, 0x00, 0x00, 0x00, // size (little endian) + // no entries + 0x00 // end marker + }; + + const auto result = json::to_bson(j); + CHECK(result == expected); + } + SECTION("non-empty object with object member") { From 5bccacda3018a944756156f1b9b5930c128fb32f Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Tue, 16 Oct 2018 19:13:07 +0200 Subject: [PATCH 22/28] BSON: throw json.exception.out_of_range.407 in case a value of type `std::uint64_t` is serialized to BSON. Also, added a missing EOF-check to binary_reader. --- include/nlohmann/detail/exceptions.hpp | 2 +- .../nlohmann/detail/input/binary_reader.hpp | 5 + .../nlohmann/detail/output/binary_writer.hpp | 7 +- single_include/nlohmann/json.hpp | 14 +- test/src/unit-bson.cpp | 354 +++++++++++++++++- 5 files changed, 376 insertions(+), 6 deletions(-) diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp index 7edc00326a..e23dd0d7ed 100644 --- a/include/nlohmann/detail/exceptions.hpp +++ b/include/nlohmann/detail/exceptions.hpp @@ -264,7 +264,7 @@ json.exception.out_of_range.403 | key 'foo' not found | The provided key was not json.exception.out_of_range.404 | unresolved reference token 'foo' | A reference token in a JSON Pointer could not be resolved. json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch operations 'remove' and 'add' can not be applied to the root element of the JSON value. json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. -json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON only supports integers numbers up to 9223372036854775807. | +json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | @liveexample{The following code shows how an `out_of_range` exception can be diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp index 2b3ff1abe0..8dfe3b98ad 100644 --- a/include/nlohmann/detail/input/binary_reader.hpp +++ b/include/nlohmann/detail/input/binary_reader.hpp @@ -256,6 +256,11 @@ class binary_reader { while (auto element_type = get()) { + if (JSON_UNLIKELY(not unexpect_eof())) + { + return false; + } + const std::size_t element_type_parse_position = chars_read; string_t key; if (JSON_UNLIKELY(not get_bson_cstr(key))) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 0ec237eaf3..0a7cf45fb8 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -800,11 +800,16 @@ class binary_writer write_bson_entry_header(name, 0x10); // int32 write_number(static_cast(value)); } - else + else if (value <= static_cast((std::numeric_limits::max)())) { write_bson_entry_header(name, 0x12); // int64 write_number(static_cast(value)); } + else + { + JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(value))); + } + } /*! diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 98c6b1f184..4bd80c548e 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -863,7 +863,7 @@ json.exception.out_of_range.403 | key 'foo' not found | The provided key was not json.exception.out_of_range.404 | unresolved reference token 'foo' | A reference token in a JSON Pointer could not be resolved. json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch operations 'remove' and 'add' can not be applied to the root element of the JSON value. json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. -json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON only supports integers numbers up to 9223372036854775807. | +json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | @liveexample{The following code shows how an `out_of_range` exception can be @@ -6198,6 +6198,11 @@ class binary_reader { while (auto element_type = get()) { + if (JSON_UNLIKELY(not unexpect_eof())) + { + return false; + } + const std::size_t element_type_parse_position = chars_read; string_t key; if (JSON_UNLIKELY(not get_bson_cstr(key))) @@ -8644,11 +8649,16 @@ class binary_writer write_bson_entry_header(name, 0x10); // int32 write_number(static_cast(value)); } - else + else if (value <= static_cast((std::numeric_limits::max)())) { write_bson_entry_header(name, 0x12); // int64 write_number(static_cast(value)); } + else + { + JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(value))); + } + } /*! diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 4a1b387e48..58ad71bd67 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -31,7 +31,6 @@ SOFTWARE. #include using nlohmann::json; - #include TEST_CASE("BSON") @@ -708,7 +707,7 @@ TEST_CASE("Incomplete BSON INPUT 3") // missing input data... }; CHECK_THROWS_WITH(json::from_bson(incomplete_bson), - "[json.exception.parse_error.110] parse error at 29: unexpected end of input"); + "[json.exception.parse_error.110] parse error at 28: unexpected end of input"); CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); SaxCountdown scp(1); @@ -752,3 +751,354 @@ TEST_CASE("Unsupported BSON input") } + +TEST_CASE("BSON numerical data") +{ + SECTION("number") + { + SECTION("signed") + { + SECTION("std::int64_t: INT64_MIN .. INT32_MIN-1") + { + std::vector numbers + { + INT64_MIN, + -1000000000000000000LL, + -100000000000000000LL, + -10000000000000000LL, + -1000000000000000LL, + -100000000000000LL, + -10000000000000LL, + -1000000000000LL, + -100000000000LL, + -10000000000LL, + static_cast(INT32_MIN) - 1, + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + CHECK(j.at("entry").is_number_integer()); + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x14u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x12u, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + static_cast((iu >> (8u * 4u)) & 0xffu), + static_cast((iu >> (8u * 5u)) & 0xffu), + static_cast((iu >> (8u * 6u)) & 0xffu), + static_cast((iu >> (8u * 7u)) & 0xffu), + 0x00u // end marker + }; + + const auto bson = json::to_bson(j); + CHECK(bson == expected_bson); + + auto j_roundtrip = json::from_bson(bson); + + CHECK(j_roundtrip.at("entry").is_number_integer()); + CHECK(j_roundtrip == j); + CHECK(json::from_bson(bson, true, false) == j); + + } + } + + + SECTION("signed std::int32_t: INT32_MIN .. INT32_MAX") + { + std::vector numbers + { + INT32_MIN, + -2147483647L, + -1000000000L, + -100000000L, + -10000000L, + -1000000L, + -100000L, + -10000L, + -1000L, + -100L, + -10L, + -1L, + 0L, + 1L, + 10L, + 100L, + 1000L, + 10000L, + 100000L, + 1000000L, + 10000000L, + 100000000L, + 1000000000L, + 2147483646L, + INT32_MAX + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + CHECK(j.at("entry").is_number_integer()); + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x10u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x10u, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + 0x00u // end marker + }; + + const auto bson = json::to_bson(j); + CHECK(bson == expected_bson); + + auto j_roundtrip = json::from_bson(bson); + + CHECK(j_roundtrip.at("entry").is_number_integer()); + CHECK(j_roundtrip == j); + CHECK(json::from_bson(bson, true, false) == j); + + } + } + + SECTION("signed std::int64_t: INT32_MAX+1 .. INT64_MAX") + { + std::vector numbers + { + INT64_MAX, + 1000000000000000000LL, + 100000000000000000LL, + 10000000000000000LL, + 1000000000000000LL, + 100000000000000LL, + 10000000000000LL, + 1000000000000LL, + 100000000000LL, + 10000000000LL, + static_cast(INT32_MAX) + 1, + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + CHECK(j.at("entry").is_number_integer()); + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x14u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x12u, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + static_cast((iu >> (8u * 4u)) & 0xffu), + static_cast((iu >> (8u * 5u)) & 0xffu), + static_cast((iu >> (8u * 6u)) & 0xffu), + static_cast((iu >> (8u * 7u)) & 0xffu), + 0x00u // end marker + }; + + const auto bson = json::to_bson(j); + CHECK(bson == expected_bson); + + auto j_roundtrip = json::from_bson(bson); + + CHECK(j_roundtrip.at("entry").is_number_integer()); + CHECK(j_roundtrip == j); + CHECK(json::from_bson(bson, true, false) == j); + + } + } + } + + SECTION("unsigned") + { + SECTION("unsigned std::uint64_t: 0 .. INT32_MAX") + { + std::vector numbers + { + 0ULL, + 1ULL, + 10ULL, + 100ULL, + 1000ULL, + 10000ULL, + 100000ULL, + 1000000ULL, + 10000000ULL, + 100000000ULL, + 1000000000ULL, + 2147483646ULL, + static_cast(INT32_MAX) + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x10u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x10u, /// entry: int32 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + 0x00u // end marker + }; + + const auto bson = json::to_bson(j); + CHECK(bson == expected_bson); + + auto j_roundtrip = json::from_bson(bson); + + CHECK(j.at("entry").is_number_unsigned()); + CHECK(j_roundtrip.at("entry").is_number_integer()); + CHECK(j_roundtrip == j); + CHECK(json::from_bson(bson, true, false) == j); + + } + } + + SECTION("unsigned std::uint64_t: INT32_MAX+1 .. INT64_MAX") + { + std::vector numbers + { + static_cast(INT32_MAX) + 1, + 4000000000ULL, + static_cast(UINT32_MAX), + 10000000000ULL, + 100000000000ULL, + 1000000000000ULL, + 10000000000000ULL, + 100000000000000ULL, + 1000000000000000ULL, + 10000000000000000ULL, + 100000000000000000ULL, + 1000000000000000000ULL, + static_cast(INT64_MAX), + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x14u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x12u, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + static_cast((iu >> (8u * 4u)) & 0xffu), + static_cast((iu >> (8u * 5u)) & 0xffu), + static_cast((iu >> (8u * 6u)) & 0xffu), + static_cast((iu >> (8u * 7u)) & 0xffu), + 0x00u // end marker + }; + + const auto bson = json::to_bson(j); + CHECK(bson == expected_bson); + + auto j_roundtrip = json::from_bson(bson); + + CHECK(j.at("entry").is_number_unsigned()); + CHECK(j_roundtrip.at("entry").is_number_integer()); + CHECK(j_roundtrip == j); + CHECK(json::from_bson(bson, true, false) == j); + } + } + + SECTION("unsigned std::uint64_t: INT64_MAX+1 .. UINT64_MAX") + { + std::vector numbers + { + static_cast(INT64_MAX) + 1ULL, + 10000000000000000000ULL, + 18000000000000000000ULL, + UINT64_MAX - 1ULL, + UINT64_MAX, + }; + + for (auto i : numbers) + { + + CAPTURE(i); + + json j = + { + { "entry", i } + }; + + std::uint64_t iu = *reinterpret_cast(&i); + std::vector expected_bson = + { + 0x14u, 0x00u, 0x00u, 0x00u, // size (little endian) + 0x12u, /// entry: int64 + 'e', 'n', 't', 'r', 'y', '\x00', + static_cast((iu >> (8u * 0u)) & 0xffu), + static_cast((iu >> (8u * 1u)) & 0xffu), + static_cast((iu >> (8u * 2u)) & 0xffu), + static_cast((iu >> (8u * 3u)) & 0xffu), + static_cast((iu >> (8u * 4u)) & 0xffu), + static_cast((iu >> (8u * 5u)) & 0xffu), + static_cast((iu >> (8u * 6u)) & 0xffu), + static_cast((iu >> (8u * 7u)) & 0xffu), + 0x00u // end marker + }; + + CHECK_THROWS_AS(json::to_bson(j), json::out_of_range&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.out_of_range.407] number overflow serializing " + std::to_string(i)); + } + } + + } + } +} From daa3ca8a2e42446a3d7fd0ae83bcffa59713b6c7 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Tue, 16 Oct 2018 19:29:42 +0200 Subject: [PATCH 23/28] BSON: Adjusted documentation of `binary_writer::to_bson()` --- include/nlohmann/json.hpp | 7 ++++++- single_include/nlohmann/json.hpp | 7 ++++++- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp index 1b61e99503..c973f0a0cf 100644 --- a/include/nlohmann/json.hpp +++ b/include/nlohmann/json.hpp @@ -6609,6 +6609,7 @@ class basic_json number_integer | 2147483648..9223372036854775807 | int64 | 0x12 number_unsigned | 0..2147483647 | int32 | 0x10 number_unsigned | 2147483648..9223372036854775807 | int64 | 0x12 + number_unsigned | 9223372036854775808..18446744073709551615| -- | -- number_float | *any value* | double | 0x01 string | *any value* | string | 0x02 array | *any value* | document | 0x04 @@ -6616,8 +6617,12 @@ class basic_json @warning The mapping is **incomplete**, since only JSON-objects (and things contained therein) can be serialized to BSON. + Also, integers larger than 9223372036854775807 cannot be serialized to BSON. - @pre The input `j` is required to be an object: `j.is_object() == true` + @throw out_of_range.407 if `j.is_number_unsigned() && j.get() > 9223372036854775807` + @throw type_error.317 if `!j.is_object()` + + @pre The input `j` is required to be an object: `j.is_object() == true`. @note Any BSON output created via @ref to_bson can be successfully parsed by @ref from_bson. diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 4bd80c548e..87abf2ca0e 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -18195,6 +18195,7 @@ class basic_json number_integer | 2147483648..9223372036854775807 | int64 | 0x12 number_unsigned | 0..2147483647 | int32 | 0x10 number_unsigned | 2147483648..9223372036854775807 | int64 | 0x12 + number_unsigned | 9223372036854775808..18446744073709551615| -- | -- number_float | *any value* | double | 0x01 string | *any value* | string | 0x02 array | *any value* | document | 0x04 @@ -18202,8 +18203,12 @@ class basic_json @warning The mapping is **incomplete**, since only JSON-objects (and things contained therein) can be serialized to BSON. + Also, integers larger than 9223372036854775807 cannot be serialized to BSON. - @pre The input `j` is required to be an object: `j.is_object() == true` + @throw out_of_range.407 if `j.is_number_unsigned() && j.get() > 9223372036854775807` + @throw type_error.317 if `!j.is_object()` + + @pre The input `j` is required to be an object: `j.is_object() == true`. @note Any BSON output created via @ref to_bson can be successfully parsed by @ref from_bson. From 978c3c4116e610ef67ecc93b8bf410e462fada0e Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Tue, 16 Oct 2018 20:42:00 +0200 Subject: [PATCH 24/28] BSON: throw `json.exception.out_of_range.409` in case a key to be serialized to BSON contains a U+0000 --- include/nlohmann/detail/exceptions.hpp | 1 + include/nlohmann/detail/output/binary_writer.hpp | 5 +++++ include/nlohmann/json.hpp | 5 ++++- single_include/nlohmann/json.hpp | 11 ++++++++++- test/src/unit-bson.cpp | 10 ++++++++++ 5 files changed, 30 insertions(+), 2 deletions(-) diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp index e23dd0d7ed..bab76b62f9 100644 --- a/include/nlohmann/detail/exceptions.hpp +++ b/include/nlohmann/detail/exceptions.hpp @@ -266,6 +266,7 @@ json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch op json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | +json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | @liveexample{The following code shows how an `out_of_range` exception can be caught.,out_of_range} diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 0a7cf45fb8..24c0800168 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -681,6 +681,11 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { + if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + { + JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); + } + return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; } diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp index c973f0a0cf..64b32a7fd3 100644 --- a/include/nlohmann/json.hpp +++ b/include/nlohmann/json.hpp @@ -6617,9 +6617,12 @@ class basic_json @warning The mapping is **incomplete**, since only JSON-objects (and things contained therein) can be serialized to BSON. - Also, integers larger than 9223372036854775807 cannot be serialized to BSON. + Also, integers larger than 9223372036854775807 cannot be serialized to BSON, + and the keys may not contain U+0000, since they are serialized a + zero-terminated c-strings. @throw out_of_range.407 if `j.is_number_unsigned() && j.get() > 9223372036854775807` + @throw out_of_range.409 if a key in `j` contains a NULL (U+0000) @throw type_error.317 if `!j.is_object()` @pre The input `j` is required to be an object: `j.is_object() == true`. diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 87abf2ca0e..b5aaecf80b 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -865,6 +865,7 @@ json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch op json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | +json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | @liveexample{The following code shows how an `out_of_range` exception can be caught.,out_of_range} @@ -8530,6 +8531,11 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { + if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + { + JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); + } + return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; } @@ -18203,9 +18209,12 @@ class basic_json @warning The mapping is **incomplete**, since only JSON-objects (and things contained therein) can be serialized to BSON. - Also, integers larger than 9223372036854775807 cannot be serialized to BSON. + Also, integers larger than 9223372036854775807 cannot be serialized to BSON, + and the keys may not contain U+0000, since they are serialized a + zero-terminated c-strings. @throw out_of_range.407 if `j.is_number_unsigned() && j.get() > 9223372036854775807` + @throw out_of_range.409 if a key in `j` contains a NULL (U+0000) @throw type_error.317 if `!j.is_object()` @pre The input `j` is required to be an object: `j.is_object() == true`. diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 58ad71bd67..f622ff3020 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -91,6 +91,16 @@ TEST_CASE("BSON") } } + SECTION("keys containing code-point U+0000 cannot be serialized to BSON") + { + json j = + { + { std::string("en\0try", 6), true } + }; + REQUIRE_THROWS_AS(json::to_bson(j), json::out_of_range); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.out_of_range.409] BSON key cannot contain code point U+0000"); + } + SECTION("objects") { SECTION("empty object") From 8de10c518b28b2c2d9b79e84f49d8c5e53229407 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Wed, 17 Oct 2018 21:47:01 +0200 Subject: [PATCH 25/28] BSON: Hopefully fixing ambiguity (on some compilers) to call to string::find() --- include/nlohmann/detail/output/binary_writer.hpp | 2 +- single_include/nlohmann/json.hpp | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index 631acce2bc..f659476e69 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -683,7 +683,7 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) { JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); } diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index 94a0be6969..e739eb5cec 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -8840,7 +8840,7 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) { JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); } From 5ba812d518e49d3952b2bc46e63c081ec3ca8e1a Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Thu, 18 Oct 2018 06:38:34 +0200 Subject: [PATCH 26/28] BSON: fixed incorrect casting in unit-bson.cpp --- test/src/unit-bson.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 13dfd52c72..633dbd2e89 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -869,7 +869,7 @@ TEST_CASE("BSON numerical data") }; CHECK(j.at("entry").is_number_integer()); - std::uint64_t iu = *reinterpret_cast(&i); + std::uint32_t iu = *reinterpret_cast(&i); std::vector expected_bson = { 0x10u, 0x00u, 0x00u, 0x00u, // size (little endian) From ad11b6c35ecebb3b4a22c8f5b814c37969160f7b Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Thu, 18 Oct 2018 20:05:46 +0200 Subject: [PATCH 27/28] BSON: Improved exception-related tests and report location of U+0000 in the key-string as part of `out_of_range.409`-message --- include/nlohmann/detail/exceptions.hpp | 2 +- .../nlohmann/detail/output/binary_writer.hpp | 6 ++-- single_include/nlohmann/json.hpp | 8 +++-- test/src/unit-bson.cpp | 31 +++++++++++++------ 4 files changed, 32 insertions(+), 15 deletions(-) diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp index 5b0420e2f9..1ac2606bd8 100644 --- a/include/nlohmann/detail/exceptions.hpp +++ b/include/nlohmann/detail/exceptions.hpp @@ -282,7 +282,7 @@ json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch op json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | -json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | +json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 (at byte 2) | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | @liveexample{The following code shows how an `out_of_range` exception can be caught.,out_of_range} diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index f659476e69..bebfa93634 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -683,9 +683,11 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + const auto it = name.find(static_cast(0)); + if (it != BasicJsonType::string_t::npos) { - JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); + JSON_THROW(out_of_range::create(409, + "BSON key cannot contain code point U+0000 (at byte " + std::to_string(it) + ")")); } return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index e739eb5cec..bbcef7848f 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -923,7 +923,7 @@ json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch op json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF. json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. | json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. | -json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | +json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 (at byte 2) | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string | @liveexample{The following code shows how an `out_of_range` exception can be caught.,out_of_range} @@ -8840,9 +8840,11 @@ class binary_writer */ static std::size_t calc_bson_entry_header_size(const typename BasicJsonType::string_t& name) { - if (name.find(static_cast(0)) != BasicJsonType::string_t::npos) + const auto it = name.find(static_cast(0)); + if (it != BasicJsonType::string_t::npos) { - JSON_THROW(out_of_range::create(409, "BSON key cannot contain code point U+0000")); + JSON_THROW(out_of_range::create(409, + "BSON key cannot contain code point U+0000 (at byte " + std::to_string(it) + ")")); } return /*id*/ 1ul + name.size() + /*zero-terminator*/1u; diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp index 633dbd2e89..3449b698ea 100644 --- a/test/src/unit-bson.cpp +++ b/test/src/unit-bson.cpp @@ -48,7 +48,8 @@ TEST_CASE("BSON") SECTION("null") { json j = nullptr; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 0 cannot be serialized to requested format"); } SECTION("boolean") @@ -56,38 +57,44 @@ TEST_CASE("BSON") SECTION("true") { json j = true; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 4 cannot be serialized to requested format"); } SECTION("false") { json j = false; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 4 cannot be serialized to requested format"); } } SECTION("number") { json j = 42; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 5 cannot be serialized to requested format"); } SECTION("float") { json j = 4.2; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 7 cannot be serialized to requested format"); } SECTION("string") { json j = "not supported"; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 3 cannot be serialized to requested format"); } SECTION("array") { json j = std::vector {1, 2, 3, 4, 5, 6, 7}; - REQUIRE_THROWS_AS(json::to_bson(j), json::type_error); + REQUIRE_THROWS_AS(json::to_bson(j), json::type_error&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.type_error.317] JSON value of type 2 cannot be serialized to requested format"); } } @@ -97,8 +104,8 @@ TEST_CASE("BSON") { { std::string("en\0try", 6), true } }; - REQUIRE_THROWS_AS(json::to_bson(j), json::out_of_range); - CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.out_of_range.409] BSON key cannot contain code point U+0000"); + REQUIRE_THROWS_AS(json::to_bson(j), json::out_of_range&); + CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.out_of_range.409] BSON key cannot contain code point U+0000 (at byte 2)"); } SECTION("objects") @@ -678,6 +685,7 @@ TEST_CASE("Incomplete BSON INPUT") 'e', 'n', 't' // unexpected EOF }; + CHECK_THROWS_AS(json::from_bson(incomplete_bson), json::parse_error&); CHECK_THROWS_WITH(json::from_bson(incomplete_bson), "[json.exception.parse_error.110] parse error at byte 9: syntax error while parsing BSON cstring: unexpected end of input"); @@ -695,6 +703,7 @@ TEST_CASE("Incomplete BSON INPUT 2") 0x08, // entry: boolean, unexpected EOF }; + CHECK_THROWS_AS(json::from_bson(incomplete_bson), json::parse_error&); CHECK_THROWS_WITH(json::from_bson(incomplete_bson), "[json.exception.parse_error.110] parse error at byte 6: syntax error while parsing BSON cstring: unexpected end of input"); CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); @@ -717,6 +726,8 @@ TEST_CASE("Incomplete BSON INPUT 3") 0x10, 0x00, 0x02, 0x00, 0x00, 0x00 // missing input data... }; + + CHECK_THROWS_AS(json::from_bson(incomplete_bson), json::parse_error&); CHECK_THROWS_WITH(json::from_bson(incomplete_bson), "[json.exception.parse_error.110] parse error at byte 28: syntax error while parsing BSON element list: unexpected end of input"); CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); @@ -734,6 +745,7 @@ TEST_CASE("Incomplete BSON INPUT 4") 0x0D, 0x00, // size (incomplete), unexpected EOF }; + CHECK_THROWS_AS(json::from_bson(incomplete_bson), json::parse_error&); CHECK_THROWS_WITH(json::from_bson(incomplete_bson), "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing BSON number: unexpected end of input"); CHECK(json::from_bson(incomplete_bson, true, false).is_discarded()); @@ -753,6 +765,7 @@ TEST_CASE("Unsupported BSON input") 0x00 // end marker }; + CHECK_THROWS_AS(json::from_bson(bson), json::parse_error&); CHECK_THROWS_WITH(json::from_bson(bson), "[json.exception.parse_error.114] parse error at byte 5: Unsupported BSON record type 0xFF"); CHECK(json::from_bson(bson, true, false).is_discarded()); From 24a4142399c01520e59a2a870666b20b402ac038 Mon Sep 17 00:00:00 2001 From: Julian Becker Date: Thu, 25 Oct 2018 07:38:02 +0200 Subject: [PATCH 28/28] BSON: Fixed array serialization by adding increasing integral names to the array elements --- .../nlohmann/detail/output/binary_writer.hpp | 7 +- single_include/nlohmann/json.hpp | 7 +- test/data/json_testsuite/README.md | 2 + .../data/json_testsuite/sample_cstr_keys.json | 3315 +++++++++++++++++ test/src/unit-bson.cpp | 80 +- 5 files changed, 3394 insertions(+), 17 deletions(-) create mode 100644 test/data/json_testsuite/sample_cstr_keys.json diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp index bebfa93634..1802e00ab7 100644 --- a/include/nlohmann/detail/output/binary_writer.hpp +++ b/include/nlohmann/detail/output/binary_writer.hpp @@ -837,10 +837,10 @@ class binary_writer static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value) { std::size_t embedded_document_size = 0ul; - + std::size_t i = 0ull; for (const auto& el : value) { - embedded_document_size += calc_bson_element_size("", el); + embedded_document_size += calc_bson_element_size(std::to_string(i++), el); } return sizeof(std::int32_t) + embedded_document_size + 1ul; @@ -854,9 +854,10 @@ class binary_writer write_bson_entry_header(name, 0x04); // array write_number(calc_bson_array_size(value)); + std::size_t i = 0ull; for (const auto& el : value) { - write_bson_element("", el); + write_bson_element(std::to_string(i++), el); } oa->write_character(static_cast(0x00)); diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp index bbcef7848f..78c78146b8 100644 --- a/single_include/nlohmann/json.hpp +++ b/single_include/nlohmann/json.hpp @@ -8994,10 +8994,10 @@ class binary_writer static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value) { std::size_t embedded_document_size = 0ul; - + std::size_t i = 0ull; for (const auto& el : value) { - embedded_document_size += calc_bson_element_size("", el); + embedded_document_size += calc_bson_element_size(std::to_string(i++), el); } return sizeof(std::int32_t) + embedded_document_size + 1ul; @@ -9011,9 +9011,10 @@ class binary_writer write_bson_entry_header(name, 0x04); // array write_number(calc_bson_array_size(value)); + std::size_t i = 0ull; for (const auto& el : value) { - write_bson_element("", el); + write_bson_element(std::to_string(i++), el); } oa->write_character(static_cast(0x00)); diff --git a/test/data/json_testsuite/README.md b/test/data/json_testsuite/README.md index e259b6d0bb..d1570df992 100644 --- a/test/data/json_testsuite/README.md +++ b/test/data/json_testsuite/README.md @@ -4,6 +4,8 @@ https://code.google.com/p/json-test-suite/downloads/detail?name=sample.zip&can=2&q= +The file sample_cstr_keys.json has been copied from sample.json and modified by removing all U+0000 code points from all the keys. + ## License Apache License Version 2.0 diff --git a/test/data/json_testsuite/sample_cstr_keys.json b/test/data/json_testsuite/sample_cstr_keys.json new file mode 100644 index 0000000000..cc9e2a265b --- /dev/null +++ b/test/data/json_testsuite/sample_cstr_keys.json @@ -0,0 +1,3315 @@ +{ + "a": { + "6U閆崬밺뀫颒myj츥휘:$薈mY햚#rz飏+玭V㭢뾿愴YꖚX亥ᮉ푊\u0006垡㐭룝\"厓ᔧḅ^Sqpv媫\"⤽걒\"˽Ἆ?ꇆ䬔未tv{DV鯀Tἆl凸g\\㈭ĭ즿UH㽤": null, + "b茤z\\.N": [[ + "ZL:ￄዎ*Y|猫劁櫕荾Oj为1糕쪥泏S룂w࡛Ᏺ⸥蚙)", + { + "\"䬰ỐwD捾V`邀⠕VD㺝sH6[칑.:醥葹*뻵倻aD\"": true, + 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0x00, 0x00, 0x00, - 0x10, 0x00, 0x02, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x03, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x04, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x05, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x06, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x07, 0x00, 0x00, 0x00, - 0x10, 0x00, 0x08, 0x00, 0x00, 0x00, + 0x3D, 0x00, 0x00, 0x00, // size (little endian) + 0x10, '0', 0x00, 0x01, 0x00, 0x00, 0x00, + 0x10, '1', 0x00, 0x02, 0x00, 0x00, 0x00, + 0x10, '2', 0x00, 0x03, 0x00, 0x00, 0x00, + 0x10, '3', 0x00, 0x04, 0x00, 0x00, 0x00, + 0x10, '4', 0x00, 0x05, 0x00, 0x00, 0x00, + 0x10, '5', 0x00, 0x06, 0x00, 0x00, 0x00, + 0x10, '6', 0x00, 0x07, 0x00, 0x00, 0x00, + 0x10, '7', 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, // end marker (embedded document) 0x00 // end marker @@ -1118,7 +1119,7 @@ TEST_CASE("BSON numerical data") 0x00u // end marker }; - CHECK_THROWS_AS(json::to_bson(j), json::out_of_range&); + CHECK_THROWS_AS(json::to_bson(j), json::out_of_range); CHECK_THROWS_WITH(json::to_bson(j), "[json.exception.out_of_range.407] number overflow serializing " + std::to_string(i)); } } @@ -1126,3 +1127,60 @@ TEST_CASE("BSON numerical data") } } } + +// use this testcase outside [hide] to run it with Valgrind +TEST_CASE("Single BSON roundtrip: sample_cstr_keys.json") +{ + std::ifstream f_json("test/data/json_testsuite/sample_cstr_keys.json"); + json j1 = json::parse(f_json); + + { + SECTION("std::vector") + { + auto packed = json::to_bson(j1); + json j2 = json::from_bson(packed); + CHECK(j1 == j2); + } + + SECTION("std::ostringstream") + { + std::ostringstream ss, ss2; + json::to_bson(j1, ss); + json j2 = json::from_bson(ss.str()); + CHECK(j1 == j2); + } + + SECTION("std::string") + { + std::string s; + json::to_bson(j1, s); + json j2 = json::from_bson(s); + CHECK(j1 == j2); + } + + } + +} + +TEST_CASE("BSON FAQ Examples") +{ + std::vector bson + { + 0x31, 0x00, 0x00, 0x00, + 0x04, 'B', 'S', 'O', 'N', 0x00, // array + 0x26, 0x00, 0x00, 0x00, // array size + 0x02, 0x30, 0x00, // string + 0x08, 0x00, 0x00, 0x00, 'a', 'w', 'e', 's', 'o', 'm', 'e', 0x00, + 0x01, 0x31, 0x00, // double + 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x14, 0x40, + 0x10, 0x32, 0x00, // int32 + 0xc2, 0x07, 0x00, 0x00, + 0x00, + 0x00}; + + json expected{ {"BSON", json::array({std::string("awesome"), 5.05, 1986})}}; + json json1 = json::from_bson(bson); + CHECK(expected == json1); + + CHECK(bson == json::to_bson(json1)); +}