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-rw-r--r--include/lib/modernjson/detail/output/binary_writer.hpp1339
1 files changed, 0 insertions, 1339 deletions
diff --git a/include/lib/modernjson/detail/output/binary_writer.hpp b/include/lib/modernjson/detail/output/binary_writer.hpp
deleted file mode 100644
index 1020e69..0000000
--- a/include/lib/modernjson/detail/output/binary_writer.hpp
+++ /dev/null
@@ -1,1339 +0,0 @@
-#pragma once
-
-#include <algorithm> // reverse
-#include <array> // array
-#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
-#include <cstring> // memcpy
-#include <limits> // numeric_limits
-
-#include <lib/modernjson/detail/input/binary_reader.hpp>
-#include <lib/modernjson/detail/output/output_adapters.hpp>
-
-namespace nlohmann
-{
-namespace detail
-{
-///////////////////
-// binary writer //
-///////////////////
-
-/*!
-@brief serialization to CBOR and MessagePack values
-*/
-template<typename BasicJsonType, typename CharType>
-class binary_writer
-{
- using string_t = typename BasicJsonType::string_t;
-
- public:
- /*!
- @brief create a binary writer
-
- @param[in] adapter output adapter to write to
- */
- explicit binary_writer(output_adapter_t<CharType> adapter) : oa(adapter)
- {
- assert(oa);
- }
-
- /*!
- @param[in] j JSON value to serialize
- @pre j.type() == value_t::object
- */
- void write_bson(const BasicJsonType& j)
- {
- switch (j.type())
- {
- case value_t::object:
- {
- write_bson_object(*j.m_value.object);
- break;
- }
-
- default:
- {
- JSON_THROW(type_error::create(317, "to serialize to BSON, top-level type must be object, but is " + std::string(j.type_name())));
- }
- }
- }
-
- /*!
- @param[in] j JSON value to serialize
- */
- void write_cbor(const BasicJsonType& j)
- {
- switch (j.type())
- {
- case value_t::null:
- {
- oa->write_character(to_char_type(0xF6));
- break;
- }
-
- case value_t::boolean:
- {
- oa->write_character(j.m_value.boolean
- ? to_char_type(0xF5)
- : to_char_type(0xF4));
- break;
- }
-
- case value_t::number_integer:
- {
- if (j.m_value.number_integer >= 0)
- {
- // CBOR does not differentiate between positive signed
- // integers and unsigned integers. Therefore, we used the
- // code from the value_t::number_unsigned case here.
- if (j.m_value.number_integer <= 0x17)
- {
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0x18));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0x19));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0x1A));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
- }
- else
- {
- oa->write_character(to_char_type(0x1B));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
- }
- }
- else
- {
- // The conversions below encode the sign in the first
- // byte, and the value is converted to a positive number.
- const auto positive_number = -1 - j.m_value.number_integer;
- if (j.m_value.number_integer >= -24)
- {
- write_number(static_cast<uint8_t>(0x20 + positive_number));
- }
- else if (positive_number <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0x38));
- write_number(static_cast<uint8_t>(positive_number));
- }
- else if (positive_number <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0x39));
- write_number(static_cast<uint16_t>(positive_number));
- }
- else if (positive_number <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0x3A));
- write_number(static_cast<uint32_t>(positive_number));
- }
- else
- {
- oa->write_character(to_char_type(0x3B));
- write_number(static_cast<uint64_t>(positive_number));
- }
- }
- break;
- }
-
- case value_t::number_unsigned:
- {
- if (j.m_value.number_unsigned <= 0x17)
- {
- write_number(static_cast<uint8_t>(j.m_value.number_unsigned));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0x18));
- write_number(static_cast<uint8_t>(j.m_value.number_unsigned));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0x19));
- write_number(static_cast<uint16_t>(j.m_value.number_unsigned));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0x1A));
- write_number(static_cast<uint32_t>(j.m_value.number_unsigned));
- }
- else
- {
- oa->write_character(to_char_type(0x1B));
- write_number(static_cast<uint64_t>(j.m_value.number_unsigned));
- }
- break;
- }
-
- case value_t::number_float:
- {
- oa->write_character(get_cbor_float_prefix(j.m_value.number_float));
- write_number(j.m_value.number_float);
- break;
- }
-
- case value_t::string:
- {
- // step 1: write control byte and the string length
- const auto N = j.m_value.string->size();
- if (N <= 0x17)
- {
- write_number(static_cast<uint8_t>(0x60 + N));
- }
- else if (N <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0x78));
- write_number(static_cast<uint8_t>(N));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0x79));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0x7A));
- write_number(static_cast<uint32_t>(N));
- }
- // LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
- {
- oa->write_character(to_char_type(0x7B));
- write_number(static_cast<uint64_t>(N));
- }
- // LCOV_EXCL_STOP
-
- // step 2: write the string
- oa->write_characters(
- reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
- j.m_value.string->size());
- break;
- }
-
- case value_t::array:
- {
- // step 1: write control byte and the array size
- const auto N = j.m_value.array->size();
- if (N <= 0x17)
- {
- write_number(static_cast<uint8_t>(0x80 + N));
- }
- else if (N <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0x98));
- write_number(static_cast<uint8_t>(N));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0x99));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0x9A));
- write_number(static_cast<uint32_t>(N));
- }
- // LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
- {
- oa->write_character(to_char_type(0x9B));
- write_number(static_cast<uint64_t>(N));
- }
- // LCOV_EXCL_STOP
-
- // step 2: write each element
- for (const auto& el : *j.m_value.array)
- {
- write_cbor(el);
- }
- break;
- }
-
- case value_t::object:
- {
- // step 1: write control byte and the object size
- const auto N = j.m_value.object->size();
- if (N <= 0x17)
- {
- write_number(static_cast<uint8_t>(0xA0 + N));
- }
- else if (N <= (std::numeric_limits<uint8_t>::max)())
- {
- oa->write_character(to_char_type(0xB8));
- write_number(static_cast<uint8_t>(N));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- oa->write_character(to_char_type(0xB9));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- oa->write_character(to_char_type(0xBA));
- write_number(static_cast<uint32_t>(N));
- }
- // LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
- {
- oa->write_character(to_char_type(0xBB));
- write_number(static_cast<uint64_t>(N));
- }
- // LCOV_EXCL_STOP
-
- // step 2: write each element
- for (const auto& el : *j.m_value.object)
- {
- write_cbor(el.first);
- write_cbor(el.second);
- }
- break;
- }
-
- default:
- break;
- }
- }
-
- /*!
- @param[in] j JSON value to serialize
- */
- void write_msgpack(const BasicJsonType& j)
- {
- switch (j.type())
- {
- case value_t::null: // nil
- {
- oa->write_character(to_char_type(0xC0));
- break;
- }
-
- case value_t::boolean: // true and false
- {
- oa->write_character(j.m_value.boolean
- ? to_char_type(0xC3)
- : to_char_type(0xC2));
- break;
- }
-
- case value_t::number_integer:
- {
- if (j.m_value.number_integer >= 0)
- {
- // MessagePack does not differentiate between positive
- // signed integers and unsigned integers. Therefore, we used
- // the code from the value_t::number_unsigned case here.
- if (j.m_value.number_unsigned < 128)
- {
- // positive fixnum
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
- {
- // uint 8
- oa->write_character(to_char_type(0xCC));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
- {
- // uint 16
- oa->write_character(to_char_type(0xCD));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
- {
- // uint 32
- oa->write_character(to_char_type(0xCE));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint64_t>::max)())
- {
- // uint 64
- oa->write_character(to_char_type(0xCF));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
- }
- }
- else
- {
- if (j.m_value.number_integer >= -32)
- {
- // negative fixnum
- write_number(static_cast<int8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer >= (std::numeric_limits<int8_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int8_t>::max)())
- {
- // int 8
- oa->write_character(to_char_type(0xD0));
- write_number(static_cast<int8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer >= (std::numeric_limits<int16_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
- {
- // int 16
- oa->write_character(to_char_type(0xD1));
- write_number(static_cast<int16_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer >= (std::numeric_limits<int32_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
- {
- // int 32
- oa->write_character(to_char_type(0xD2));
- write_number(static_cast<int32_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_integer >= (std::numeric_limits<int64_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int64_t>::max)())
- {
- // int 64
- oa->write_character(to_char_type(0xD3));
- write_number(static_cast<int64_t>(j.m_value.number_integer));
- }
- }
- break;
- }
-
- case value_t::number_unsigned:
- {
- if (j.m_value.number_unsigned < 128)
- {
- // positive fixnum
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
- {
- // uint 8
- oa->write_character(to_char_type(0xCC));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
- {
- // uint 16
- oa->write_character(to_char_type(0xCD));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
- {
- // uint 32
- oa->write_character(to_char_type(0xCE));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint64_t>::max)())
- {
- // uint 64
- oa->write_character(to_char_type(0xCF));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
- }
- break;
- }
-
- case value_t::number_float:
- {
- oa->write_character(get_msgpack_float_prefix(j.m_value.number_float));
- write_number(j.m_value.number_float);
- break;
- }
-
- case value_t::string:
- {
- // step 1: write control byte and the string length
- const auto N = j.m_value.string->size();
- if (N <= 31)
- {
- // fixstr
- write_number(static_cast<uint8_t>(0xA0 | N));
- }
- else if (N <= (std::numeric_limits<uint8_t>::max)())
- {
- // str 8
- oa->write_character(to_char_type(0xD9));
- write_number(static_cast<uint8_t>(N));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- // str 16
- oa->write_character(to_char_type(0xDA));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- // str 32
- oa->write_character(to_char_type(0xDB));
- write_number(static_cast<uint32_t>(N));
- }
-
- // step 2: write the string
- oa->write_characters(
- reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
- j.m_value.string->size());
- break;
- }
-
- case value_t::array:
- {
- // step 1: write control byte and the array size
- const auto N = j.m_value.array->size();
- if (N <= 15)
- {
- // fixarray
- write_number(static_cast<uint8_t>(0x90 | N));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- // array 16
- oa->write_character(to_char_type(0xDC));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- // array 32
- oa->write_character(to_char_type(0xDD));
- write_number(static_cast<uint32_t>(N));
- }
-
- // step 2: write each element
- for (const auto& el : *j.m_value.array)
- {
- write_msgpack(el);
- }
- break;
- }
-
- case value_t::object:
- {
- // step 1: write control byte and the object size
- const auto N = j.m_value.object->size();
- if (N <= 15)
- {
- // fixmap
- write_number(static_cast<uint8_t>(0x80 | (N & 0xF)));
- }
- else if (N <= (std::numeric_limits<uint16_t>::max)())
- {
- // map 16
- oa->write_character(to_char_type(0xDE));
- write_number(static_cast<uint16_t>(N));
- }
- else if (N <= (std::numeric_limits<uint32_t>::max)())
- {
- // map 32
- oa->write_character(to_char_type(0xDF));
- write_number(static_cast<uint32_t>(N));
- }
-
- // step 2: write each element
- for (const auto& el : *j.m_value.object)
- {
- write_msgpack(el.first);
- write_msgpack(el.second);
- }
- break;
- }
-
- default:
- break;
- }
- }
-
- /*!
- @param[in] j JSON value to serialize
- @param[in] use_count whether to use '#' prefixes (optimized format)
- @param[in] use_type whether to use '$' prefixes (optimized format)
- @param[in] add_prefix whether prefixes need to be used for this value
- */
- void write_ubjson(const BasicJsonType& j, const bool use_count,
- const bool use_type, const bool add_prefix = true)
- {
- switch (j.type())
- {
- case value_t::null:
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('Z'));
- }
- break;
- }
-
- case value_t::boolean:
- {
- if (add_prefix)
- {
- oa->write_character(j.m_value.boolean
- ? to_char_type('T')
- : to_char_type('F'));
- }
- break;
- }
-
- case value_t::number_integer:
- {
- write_number_with_ubjson_prefix(j.m_value.number_integer, add_prefix);
- break;
- }
-
- case value_t::number_unsigned:
- {
- write_number_with_ubjson_prefix(j.m_value.number_unsigned, add_prefix);
- break;
- }
-
- case value_t::number_float:
- {
- write_number_with_ubjson_prefix(j.m_value.number_float, add_prefix);
- break;
- }
-
- case value_t::string:
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('S'));
- }
- write_number_with_ubjson_prefix(j.m_value.string->size(), true);
- oa->write_characters(
- reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
- j.m_value.string->size());
- break;
- }
-
- case value_t::array:
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('['));
- }
-
- bool prefix_required = true;
- if (use_type and not j.m_value.array->empty())
- {
- assert(use_count);
- const CharType first_prefix = ubjson_prefix(j.front());
- const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
- [this, first_prefix](const BasicJsonType & v)
- {
- return ubjson_prefix(v) == first_prefix;
- });
-
- if (same_prefix)
- {
- prefix_required = false;
- oa->write_character(to_char_type('$'));
- oa->write_character(first_prefix);
- }
- }
-
- if (use_count)
- {
- oa->write_character(to_char_type('#'));
- write_number_with_ubjson_prefix(j.m_value.array->size(), true);
- }
-
- for (const auto& el : *j.m_value.array)
- {
- write_ubjson(el, use_count, use_type, prefix_required);
- }
-
- if (not use_count)
- {
- oa->write_character(to_char_type(']'));
- }
-
- break;
- }
-
- case value_t::object:
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('{'));
- }
-
- bool prefix_required = true;
- if (use_type and not j.m_value.object->empty())
- {
- assert(use_count);
- const CharType first_prefix = ubjson_prefix(j.front());
- const bool same_prefix = std::all_of(j.begin(), j.end(),
- [this, first_prefix](const BasicJsonType & v)
- {
- return ubjson_prefix(v) == first_prefix;
- });
-
- if (same_prefix)
- {
- prefix_required = false;
- oa->write_character(to_char_type('$'));
- oa->write_character(first_prefix);
- }
- }
-
- if (use_count)
- {
- oa->write_character(to_char_type('#'));
- write_number_with_ubjson_prefix(j.m_value.object->size(), true);
- }
-
- for (const auto& el : *j.m_value.object)
- {
- write_number_with_ubjson_prefix(el.first.size(), true);
- oa->write_characters(
- reinterpret_cast<const CharType*>(el.first.c_str()),
- el.first.size());
- write_ubjson(el.second, use_count, use_type, prefix_required);
- }
-
- if (not use_count)
- {
- oa->write_character(to_char_type('}'));
- }
-
- break;
- }
-
- default:
- break;
- }
- }
-
- private:
- //////////
- // BSON //
- //////////
-
- /*!
- @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 string_t& name)
- {
- const auto it = name.find(static_cast<typename string_t::value_type>(0));
- if (JSON_UNLIKELY(it != BasicJsonType::string_t::npos))
- {
- 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;
- }
-
- /*!
- @brief Writes the given @a element_type and @a name to the output adapter
- */
- void write_bson_entry_header(const string_t& name,
- const std::uint8_t element_type)
- {
- oa->write_character(to_char_type(element_type)); // boolean
- oa->write_characters(
- reinterpret_cast<const CharType*>(name.c_str()),
- name.size() + 1u);
- }
-
- /*!
- @brief Writes a BSON element with key @a name and boolean value @a value
- */
- void write_bson_boolean(const string_t& name,
- const bool value)
- {
- write_bson_entry_header(name, 0x08);
- oa->write_character(value ? to_char_type(0x01) : to_char_type(0x00));
- }
-
- /*!
- @brief Writes a BSON element with key @a name and double value @a value
- */
- void write_bson_double(const string_t& name,
- const double value)
- {
- write_bson_entry_header(name, 0x01);
- write_number<double, true>(value);
- }
-
- /*!
- @return The size of the BSON-encoded string in @a value
- */
- static std::size_t calc_bson_string_size(const string_t& value)
- {
- return sizeof(std::int32_t) + value.size() + 1ul;
- }
-
- /*!
- @brief Writes a BSON element with key @a name and string value @a value
- */
- void write_bson_string(const string_t& name,
- const string_t& value)
- {
- write_bson_entry_header(name, 0x02);
-
- write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size() + 1ul));
- oa->write_characters(
- reinterpret_cast<const CharType*>(value.c_str()),
- value.size() + 1);
- }
-
- /*!
- @brief Writes a BSON element with key @a name and null value
- */
- void write_bson_null(const string_t& name)
- {
- write_bson_entry_header(name, 0x0A);
- }
-
- /*!
- @return The size of the BSON-encoded integer @a value
- */
- static std::size_t calc_bson_integer_size(const std::int64_t value)
- {
- if ((std::numeric_limits<std::int32_t>::min)() <= value and value <= (std::numeric_limits<std::int32_t>::max)())
- {
- return sizeof(std::int32_t);
- }
- else
- {
- return sizeof(std::int64_t);
- }
- }
-
- /*!
- @brief Writes a BSON element with key @a name and integer @a value
- */
- void write_bson_integer(const string_t& name,
- const std::int64_t value)
- {
- if ((std::numeric_limits<std::int32_t>::min)() <= value and value <= (std::numeric_limits<std::int32_t>::max)())
- {
- write_bson_entry_header(name, 0x10); // int32
- write_number<std::int32_t, true>(static_cast<std::int32_t>(value));
- }
- else
- {
- write_bson_entry_header(name, 0x12); // int64
- write_number<std::int64_t, true>(static_cast<std::int64_t>(value));
- }
- }
-
- /*!
- @return The size of the BSON-encoded unsigned integer in @a j
- */
- static constexpr std::size_t calc_bson_unsigned_size(const std::uint64_t value) noexcept
- {
- return (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
- ? sizeof(std::int32_t)
- : sizeof(std::int64_t);
- }
-
- /*!
- @brief Writes a BSON element with key @a name and unsigned @a value
- */
- void write_bson_unsigned(const string_t& name,
- const std::uint64_t value)
- {
- if (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
- {
- write_bson_entry_header(name, 0x10 /* int32 */);
- write_number<std::int32_t, true>(static_cast<std::int32_t>(value));
- }
- else if (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
- {
- write_bson_entry_header(name, 0x12 /* int64 */);
- write_number<std::int64_t, true>(static_cast<std::int64_t>(value));
- }
- else
- {
- JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(value) + " cannot be represented by BSON as it does not fit int64"));
- }
- }
-
- /*!
- @brief Writes a BSON element with key @a name and object @a value
- */
- void write_bson_object_entry(const string_t& name,
- const typename BasicJsonType::object_t& value)
- {
- write_bson_entry_header(name, 0x03); // object
- write_bson_object(value);
- }
-
- /*!
- @return The size of the BSON-encoded array @a value
- */
- static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value)
- {
- std::size_t embedded_document_size = 0ul;
- std::size_t array_index = 0ul;
-
- for (const auto& el : value)
- {
- embedded_document_size += calc_bson_element_size(std::to_string(array_index++), el);
- }
-
- 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 string_t& name,
- const typename BasicJsonType::array_t& value)
- {
- write_bson_entry_header(name, 0x04); // array
- write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_array_size(value)));
-
- std::size_t array_index = 0ul;
-
- for (const auto& el : value)
- {
- write_bson_element(std::to_string(array_index++), el);
- }
-
- oa->write_character(to_char_type(0x00));
- }
-
- /*!
- @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 string_t& name,
- const BasicJsonType& j)
- {
- const auto header_size = calc_bson_entry_header_size(name);
- switch (j.type())
- {
- 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;
-
- // LCOV_EXCL_START
- default:
- assert(false);
- return 0ul;
- // LCOV_EXCL_STOP
- };
- }
-
- /*!
- @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 string_t& name,
- const BasicJsonType& j)
- {
- switch (j.type())
- {
- case value_t::object:
- return write_bson_object_entry(name, *j.m_value.object);
-
- case value_t::array:
- return write_bson_array(name, *j.m_value.array);
-
- case value_t::boolean:
- return write_bson_boolean(name, j.m_value.boolean);
-
- case value_t::number_float:
- return write_bson_double(name, j.m_value.number_float);
-
- case value_t::number_integer:
- return write_bson_integer(name, j.m_value.number_integer);
-
- case value_t::number_unsigned:
- return write_bson_unsigned(name, j.m_value.number_unsigned);
-
- case value_t::string:
- return write_bson_string(name, *j.m_value.string);
-
- case value_t::null:
- return write_bson_null(name);
-
- // LCOV_EXCL_START
- default:
- assert(false);
- return;
- // LCOV_EXCL_STOP
- };
- }
-
- /*!
- @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 = std::accumulate(value.begin(), value.end(), 0ul,
- [](size_t result, const typename BasicJsonType::object_t::value_type & el)
- {
- return result += 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
- */
- void write_bson_object(const typename BasicJsonType::object_t& value)
- {
- write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_object_size(value)));
-
- for (const auto& el : value)
- {
- write_bson_element(el.first, el.second);
- }
-
- oa->write_character(to_char_type(0x00));
- }
-
- //////////
- // CBOR //
- //////////
-
- static constexpr CharType get_cbor_float_prefix(float /*unused*/)
- {
- return to_char_type(0xFA); // Single-Precision Float
- }
-
- static constexpr CharType get_cbor_float_prefix(double /*unused*/)
- {
- return to_char_type(0xFB); // Double-Precision Float
- }
-
- /////////////
- // MsgPack //
- /////////////
-
- static constexpr CharType get_msgpack_float_prefix(float /*unused*/)
- {
- return to_char_type(0xCA); // float 32
- }
-
- static constexpr CharType get_msgpack_float_prefix(double /*unused*/)
- {
- return to_char_type(0xCB); // float 64
- }
-
- ////////////
- // UBJSON //
- ////////////
-
- // UBJSON: write number (floating point)
- template<typename NumberType, typename std::enable_if<
- std::is_floating_point<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
- {
- if (add_prefix)
- {
- oa->write_character(get_ubjson_float_prefix(n));
- }
- write_number(n);
- }
-
- // UBJSON: write number (unsigned integer)
- template<typename NumberType, typename std::enable_if<
- std::is_unsigned<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
- {
- if (n <= static_cast<uint64_t>((std::numeric_limits<int8_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('i')); // int8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if (n <= (std::numeric_limits<uint8_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('U')); // uint8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int16_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('I')); // int16
- }
- write_number(static_cast<int16_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int32_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('l')); // int32
- }
- write_number(static_cast<int32_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int64_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('L')); // int64
- }
- write_number(static_cast<int64_t>(n));
- }
- else
- {
- JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
- }
- }
-
- // UBJSON: write number (signed integer)
- template<typename NumberType, typename std::enable_if<
- std::is_signed<NumberType>::value and
- not std::is_floating_point<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
- {
- if ((std::numeric_limits<int8_t>::min)() <= n and n <= (std::numeric_limits<int8_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('i')); // int8
- }
- write_number(static_cast<int8_t>(n));
- }
- else if (static_cast<int64_t>((std::numeric_limits<uint8_t>::min)()) <= n and n <= static_cast<int64_t>((std::numeric_limits<uint8_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('U')); // uint8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if ((std::numeric_limits<int16_t>::min)() <= n and n <= (std::numeric_limits<int16_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('I')); // int16
- }
- write_number(static_cast<int16_t>(n));
- }
- else if ((std::numeric_limits<int32_t>::min)() <= n and n <= (std::numeric_limits<int32_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('l')); // int32
- }
- write_number(static_cast<int32_t>(n));
- }
- else if ((std::numeric_limits<int64_t>::min)() <= n and n <= (std::numeric_limits<int64_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(to_char_type('L')); // int64
- }
- write_number(static_cast<int64_t>(n));
- }
- // LCOV_EXCL_START
- else
- {
- JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
- }
- // LCOV_EXCL_STOP
- }
-
- /*!
- @brief determine the type prefix of container values
-
- @note This function does not need to be 100% accurate when it comes to
- integer limits. In case a number exceeds the limits of int64_t,
- this will be detected by a later call to function
- write_number_with_ubjson_prefix. Therefore, we return 'L' for any
- value that does not fit the previous limits.
- */
- CharType ubjson_prefix(const BasicJsonType& j) const noexcept
- {
- switch (j.type())
- {
- case value_t::null:
- return 'Z';
-
- case value_t::boolean:
- return j.m_value.boolean ? 'T' : 'F';
-
- case value_t::number_integer:
- {
- if ((std::numeric_limits<int8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int8_t>::max)())
- {
- return 'i';
- }
- if ((std::numeric_limits<uint8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
- {
- return 'U';
- }
- if ((std::numeric_limits<int16_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
- {
- return 'I';
- }
- if ((std::numeric_limits<int32_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
- {
- return 'l';
- }
- // no check and assume int64_t (see note above)
- return 'L';
- }
-
- case value_t::number_unsigned:
- {
- if (j.m_value.number_unsigned <= (std::numeric_limits<int8_t>::max)())
- {
- return 'i';
- }
- if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
- {
- return 'U';
- }
- if (j.m_value.number_unsigned <= (std::numeric_limits<int16_t>::max)())
- {
- return 'I';
- }
- if (j.m_value.number_unsigned <= (std::numeric_limits<int32_t>::max)())
- {
- return 'l';
- }
- // no check and assume int64_t (see note above)
- return 'L';
- }
-
- case value_t::number_float:
- return get_ubjson_float_prefix(j.m_value.number_float);
-
- case value_t::string:
- return 'S';
-
- case value_t::array:
- return '[';
-
- case value_t::object:
- return '{';
-
- default: // discarded values
- return 'N';
- }
- }
-
- static constexpr CharType get_ubjson_float_prefix(float /*unused*/)
- {
- return 'd'; // float 32
- }
-
- static constexpr CharType get_ubjson_float_prefix(double /*unused*/)
- {
- return 'D'; // float 64
- }
-
- ///////////////////////
- // Utility functions //
- ///////////////////////
-
- /*
- @brief write a number to output input
- @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<typename NumberType, bool OutputIsLittleEndian = false>
- void write_number(const NumberType n)
- {
- // step 1: write number to array of length NumberType
- std::array<CharType, sizeof(NumberType)> vec;
- std::memcpy(vec.data(), &n, sizeof(NumberType));
-
- // step 2: write array to output (with possible reordering)
- if (is_little_endian and not OutputIsLittleEndian)
- {
- // reverse byte order prior to conversion if necessary
- std::reverse(vec.begin(), vec.end());
- }
-
- oa->write_characters(vec.data(), sizeof(NumberType));
- }
-
- public:
- // The following to_char_type functions are implement the conversion
- // between uint8_t and CharType. In case CharType is not unsigned,
- // such a conversion is required to allow values greater than 128.
- // See <https://github.com/nlohmann/json/issues/1286> for a discussion.
- template < typename C = CharType,
- enable_if_t < std::is_signed<C>::value and std::is_signed<char>::value > * = nullptr >
- static constexpr CharType to_char_type(std::uint8_t x) noexcept
- {
- return *reinterpret_cast<char*>(&x);
- }
-
- template < typename C = CharType,
- enable_if_t < std::is_signed<C>::value and std::is_unsigned<char>::value > * = nullptr >
- static CharType to_char_type(std::uint8_t x) noexcept
- {
- static_assert(sizeof(std::uint8_t) == sizeof(CharType), "size of CharType must be equal to std::uint8_t");
- static_assert(std::is_pod<CharType>::value, "CharType must be POD");
- CharType result;
- std::memcpy(&result, &x, sizeof(x));
- return result;
- }
-
- template<typename C = CharType,
- enable_if_t<std::is_unsigned<C>::value>* = nullptr>
- static constexpr CharType to_char_type(std::uint8_t x) noexcept
- {
- return x;
- }
-
- template < typename InputCharType, typename C = CharType,
- enable_if_t <
- std::is_signed<C>::value and
- std::is_signed<char>::value and
- std::is_same<char, typename std::remove_cv<InputCharType>::type>::value
- > * = nullptr >
- static constexpr CharType to_char_type(InputCharType x) noexcept
- {
- return x;
- }
-
- private:
- /// whether we can assume little endianess
- const bool is_little_endian = binary_reader<BasicJsonType>::little_endianess();
-
- /// the output
- output_adapter_t<CharType> oa = nullptr;
-};
-} // namespace detail
-} // namespace nlohmann
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