deserialization of CBOR, MessagePack, and UBJSON values More...

#include <json.hpp>

Public Member Functions
	binary_reader (InputAdapterType &&adapter)
	create a binary reader More...

bool	sax_parse (const input_format_t format, json_sax_t *sax_, const bool strict=true, const cbor_tag_handler_t tag_handler=cbor_tag_handler_t::error)

Private Member Functions
bool	parse_bson_internal ()
	Reads in a BSON-object and passes it to the SAX-parser. More...

bool	get_bson_cstr (string_t &result)
	Parses a C-style string from the BSON input. More...

template<typename NumberType >
bool	get_bson_string (const NumberType len, string_t &result)
	Parses a zero-terminated string of length len from the BSON input. More...

template<typename NumberType >
bool	get_bson_binary (const NumberType len, binary_t &result)
	Parses a byte array input of length len from the BSON input. More...

bool	parse_bson_element_internal (const char_int_type element_type, const std::size_t element_type_parse_position)
	Read a BSON document element of the given element_type. More...

bool	parse_bson_element_list (const bool is_array)
	Read a BSON element list (as specified in the BSON-spec) More...

bool	parse_bson_array ()
	Reads an array from the BSON input and passes it to the SAX-parser. More...

bool	parse_cbor_internal (const bool get_char, const cbor_tag_handler_t tag_handler)

bool	get_cbor_string (string_t &result)
	reads a CBOR string More...

bool	get_cbor_binary (binary_t &result)
	reads a CBOR byte array More...

bool	get_cbor_array (const std::size_t len, const cbor_tag_handler_t tag_handler)

bool	get_cbor_object (const std::size_t len, const cbor_tag_handler_t tag_handler)

bool	parse_msgpack_internal ()

bool	get_msgpack_string (string_t &result)
	reads a MessagePack string More...

bool	get_msgpack_binary (binary_t &result)
	reads a MessagePack byte array More...

bool	get_msgpack_array (const std::size_t len)

bool	get_msgpack_object (const std::size_t len)

bool	parse_ubjson_internal (const bool get_char=true)

bool	get_ubjson_string (string_t &result, const bool get_char=true)
	reads a UBJSON string More...

bool	get_ubjson_size_value (std::size_t &result)

bool	get_ubjson_size_type (std::pair< std::size_t, char_int_type > &result)
	determine the type and size for a container More...

bool	get_ubjson_value (const char_int_type prefix)

bool	get_ubjson_array ()

bool	get_ubjson_object ()

char_int_type	get ()
	get next character from the input More...

char_int_type	get_ignore_noop ()

template<typename NumberType >
bool	get_string (const input_format_t format, const NumberType len, string_t &result)
	create a string by reading characters from the input More...

template<typename NumberType >
bool	get_binary (const input_format_t format, const NumberType len, binary_t &result)
	create a byte array by reading bytes from the input More...

bool	unexpect_eof (const input_format_t format, const char *context) const

std::string	get_token_string () const

std::string	exception_message (const input_format_t format, const std::string &detail, const std::string &context) const

Private Attributes
InputAdapterType	ia
	input adapter

char_int_type	current = std::char_traits<char_type>::eof()
	the current character

std::size_t	chars_read = 0
	the number of characters read

const bool	is_little_endian = little_endianess()
	whether we can assume little endianess

json_sax_t *	sax = nullptr
	the SAX parser

Detailed Description

template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType>>
class nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >

deserialization of CBOR, MessagePack, and UBJSON values

Constructor & Destructor Documentation

◆ binary_reader()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::binary_reader ( InputAdapterType && adapter )

inlineexplicit

create a binary reader

Parameters

[in] adapter input adapter to read from

Member Function Documentation

◆ sax_parse()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::sax_parse	(	const input_format_t	format,
		json_sax_t *	sax_,
		const bool	strict = `true`,
		const cbor_tag_handler_t	tag_handler = `cbor_tag_handler_t::error`
	)

inline

Parameters

[in]	format	the binary format to parse
[in]	sax_	a SAX event processor
[in]	strict	whether to expect the input to be consumed completed
[in]	tag_handler	how to treat CBOR tags

Returns

◆ parse_bson_internal()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_bson_internal ( )

inlineprivate

Reads in a BSON-object and passes it to the SAX-parser.

Returns: whether a valid BSON-value was passed to the SAX parser

◆ get_bson_cstr()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_bson_cstr ( string_t & result )

inlineprivate

Parses a C-style string from the BSON input.

Parameters

[in,out] result A reference to the string variable where the read string is to be stored.

Returns: true if the \x00-byte indicating the end of the string was encountered before the EOF; false` indicates an unexpected EOF.

◆ get_bson_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

template<typename NumberType >

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_bson_string	(	const NumberType	len,
		string_t &	result
	)

inlineprivate

Parses a zero-terminated string of length len from the BSON input.

Parameters

[in]	len	The length (including the zero-byte at the end) of the string to be read.
[in,out]	result	A reference to the string variable where the read string is to be stored.

Template Parameters

NumberType The type of the length len

Precondition: len >= 1

Returns: true if the string was successfully parsed

◆ get_bson_binary()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

template<typename NumberType >

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_bson_binary	(	const NumberType	len,
		binary_t &	result
	)

inlineprivate

Parses a byte array input of length len from the BSON input.

Parameters

[in]	len	The length of the byte array to be read.
[in,out]	result	A reference to the binary variable where the read array is to be stored.

Template Parameters

NumberType The type of the length len

Precondition: len >= 0

Returns: true if the byte array was successfully parsed

◆ parse_bson_element_internal()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_bson_element_internal	(	const char_int_type	element_type,
		const std::size_t	element_type_parse_position
	)

inlineprivate

Read a BSON document element of the given element_type.

Parameters

[in]	element_type	The BSON element type, c.f. http://bsonspec.org/spec.html
[in]	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 element_type will give rise to a parse_error.114: Unsupported BSON record type 0x...

Returns: whether a valid BSON-object/array was passed to the SAX parser

◆ parse_bson_element_list()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_bson_element_list ( const bool is_array )

inlineprivate

Read a BSON element list (as specified in the BSON-spec)

The same binary layout is used for objects and arrays, hence it must be indicated with the argument is_array which one is expected (true --> array, false --> object).

Parameters

[in] is_array Determines if the element list being read is to be treated as an object (is_array == false), or as an array (is_array == true).

Returns: whether a valid BSON-object/array was passed to the SAX parser

◆ parse_bson_array()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_bson_array ( )

inlineprivate

Reads an array from the BSON input and passes it to the SAX-parser.

Returns: whether a valid BSON-array was passed to the SAX parser

◆ parse_cbor_internal()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_cbor_internal	(	const bool	get_char,
		const cbor_tag_handler_t	tag_handler
	)

inlineprivate

Parameters

[in]	get_char	whether a new character should be retrieved from the input (true) or whether the last read character should be considered instead (false)
[in]	tag_handler	how CBOR tags should be treated

Returns: whether a valid CBOR value was passed to the SAX parser

◆ get_cbor_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_string ( string_t & result )

inlineprivate

reads a CBOR string

This function first reads starting bytes to determine the expected string length and then copies this number of bytes into a string. Additionally, CBOR's strings with indefinite lengths are supported.

Parameters

[out] result created string

Returns: whether string creation completed

◆ get_cbor_binary()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_binary ( binary_t & result )

inlineprivate

reads a CBOR byte array

This function first reads starting bytes to determine the expected byte array length and then copies this number of bytes into the byte array. Additionally, CBOR's byte arrays with indefinite lengths are supported.

Parameters

[out] result created byte array

Returns: whether byte array creation completed

◆ get_cbor_array()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_array	(	const std::size_t	len,
		const cbor_tag_handler_t	tag_handler
	)

inlineprivate

Parameters

[in]	len	the length of the array or std::size_t(-1) for an array of indefinite size
[in]	tag_handler	how CBOR tags should be treated

Returns: whether array creation completed

◆ get_cbor_object()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_object	(	const std::size_t	len,
		const cbor_tag_handler_t	tag_handler
	)

inlineprivate

Parameters

[in]	len	the length of the object or std::size_t(-1) for an object of indefinite size
[in]	tag_handler	how CBOR tags should be treated

Returns: whether object creation completed

◆ parse_msgpack_internal()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_msgpack_internal ( )

inlineprivate

Returns: whether a valid MessagePack value was passed to the SAX parser

◆ get_msgpack_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_msgpack_string ( string_t & result )

inlineprivate

reads a MessagePack string

This function first reads starting bytes to determine the expected string length and then copies this number of bytes into a string.

Parameters

[out] result created string

Returns: whether string creation completed

◆ get_msgpack_binary()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_msgpack_binary ( binary_t & result )

inlineprivate

reads a MessagePack byte array

This function first reads starting bytes to determine the expected byte array length and then copies this number of bytes into a byte array.

Parameters

[out] result created byte array

Returns: whether byte array creation completed

◆ get_msgpack_array()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_msgpack_array ( const std::size_t len )

inlineprivate

Parameters

[in] len the length of the array

Returns: whether array creation completed

◆ get_msgpack_object()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_msgpack_object ( const std::size_t len )

inlineprivate

Parameters

[in] len the length of the object

Returns: whether object creation completed

◆ parse_ubjson_internal()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_ubjson_internal ( const bool get_char = true )

inlineprivate

Parameters

[in] get_char whether a new character should be retrieved from the input (true, default) or whether the last read character should be considered instead

Returns: whether a valid UBJSON value was passed to the SAX parser

◆ get_ubjson_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_string	(	string_t &	result,
		const bool	get_char = `true`
	)

inlineprivate

reads a UBJSON string

This function is either called after reading the 'S' byte explicitly indicating a string, or in case of an object key where the 'S' byte can be left out.

Parameters

[out]	result	created string
[in]	get_char	whether a new character should be retrieved from the input (true, default) or whether the last read character should be considered instead

Returns: whether string creation completed

◆ get_ubjson_size_value()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_size_value ( std::size_t & result )

inlineprivate

Parameters

[out] result determined size

Returns: whether size determination completed

◆ get_ubjson_size_type()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_size_type ( std::pair< std::size_t, char_int_type > & result )

inlineprivate

determine the type and size for a container

In the optimized UBJSON format, a type and a size can be provided to allow for a more compact representation.

Parameters

[out] result pair of the size and the type

Returns: whether pair creation completed

◆ get_ubjson_value()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_value ( const char_int_type prefix )

inlineprivate

Parameters

prefix the previously read or set type prefix

Returns: whether value creation completed

◆ get_ubjson_array()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_array ( )

inlineprivate

Returns: whether array creation completed

◆ get_ubjson_object()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_object ( )

inlineprivate

Returns: whether object creation completed

◆ get()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

char_int_type nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get ( )

inlineprivate

get next character from the input

This function provides the interface to the used input adapter. It does not throw in case the input reached EOF, but returns a -'ve valued std::char_traits<char_type>::eof() in that case.

Returns: character read from the input

◆ get_ignore_noop()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

char_int_type nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ignore_noop ( )

inlineprivate

Returns: character read from the input after ignoring all 'N' entries

◆ get_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

template<typename NumberType >

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_string	(	const input_format_t	format,
		const NumberType	len,
		string_t &	result
	)

inlineprivate

create a string by reading characters from the input

Template Parameters

NumberType the type of the number

Parameters

[in]	format	the current format (for diagnostics)
[in]	len	number of characters to read
[out]	result	string created by reading len bytes

Returns: whether string creation completed

Note: We can not reserve len bytes for the result, because len may be too large. Usually, unexpect_eof() detects the end of the input before we run out of string memory.

◆ get_binary()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

template<typename NumberType >

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_binary	(	const input_format_t	format,
		const NumberType	len,
		binary_t &	result
	)

inlineprivate

create a byte array by reading bytes from the input

Template Parameters

NumberType the type of the number

Parameters

[in]	format	the current format (for diagnostics)
[in]	len	number of bytes to read
[out]	result	byte array created by reading len bytes

Returns: whether byte array creation completed

Note: We can not reserve len bytes for the result, because len may be too large. Usually, unexpect_eof() detects the end of the input before we run out of memory.

◆ unexpect_eof()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::unexpect_eof	(	const input_format_t	format,
		const char *	context
	)		const

inlineprivate

Parameters

[in]	format	the current format (for diagnostics)
[in]	context	further context information (for diagnostics)

Returns: whether the last read character is not EOF

◆ get_token_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

std::string nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_token_string ( ) const

inlineprivate

Returns: a string representation of the last read byte

◆ exception_message()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

std::string nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::exception_message	(	const input_format_t	format,
		const std::string &	detail,
		const std::string &	context
	)		const

inlineprivate

Parameters

[in]	format	the current format
[in]	detail	a detailed error message
[in]	context	further context information

Returns: a message string to use in the parse_error exceptions

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType>> class nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >

Constructor & Destructor Documentation

◆ binary_reader()

Member Function Documentation

◆ sax_parse()

◆ parse_bson_internal()

◆ get_bson_cstr()

◆ get_bson_string()

◆ get_bson_binary()

◆ parse_bson_element_internal()

◆ parse_bson_element_list()

◆ parse_bson_array()

◆ parse_cbor_internal()

◆ get_cbor_string()

◆ get_cbor_binary()

◆ get_cbor_array()

◆ get_cbor_object()

◆ parse_msgpack_internal()

◆ get_msgpack_string()

◆ get_msgpack_binary()

◆ get_msgpack_array()

◆ get_msgpack_object()

◆ parse_ubjson_internal()

◆ get_ubjson_string()

◆ get_ubjson_size_value()

◆ get_ubjson_size_type()

◆ get_ubjson_value()

◆ get_ubjson_array()

◆ get_ubjson_object()

◆ get()

◆ get_ignore_noop()

◆ get_string()

◆ get_binary()

◆ unexpect_eof()

◆ get_token_string()

◆ exception_message()

template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType>>
class nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >