📝 improved documentation for to-CBOR and to-msgpack functions
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Niels Lohmann
parent
1de80e8af4
commit
710f8a2686
2 changed files with 216 additions and 0 deletions
108
src/json.hpp
108
src/json.hpp
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@ -8815,6 +8815,55 @@ class basic_json
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serialization format. MessagePack is a binary serialization format which
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aims to be more compact than JSON itself, yet more efficient to parse.
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The library uses the following mapping from JSON values types to
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MessagePack types according to the MessagePack specification:
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JSON value type | value/range | MessagePack type | first byte
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--------------- | --------------------------------- | ---------------- | ----------
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null | `null` | nil | 0xc0
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boolean | `true` | true | 0xc3
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boolean | `false` | false | 0xc2
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number_integer | -9223372036854775808..-2147483649 | int64 | 0xd3
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number_integer | -2147483648..-32769 | int32 | 0xd2
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number_integer | -32768..-129 | int16 | 0xd1
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number_integer | -128..-33 | int8 | 0xd0
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number_integer | -32..-1 | negative fixint | 0xe0..0xff
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number_integer | 0..127 | positive fixint | 0x00..0x7f
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number_integer | 128..255 | uint 8 | 0xcc
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number_integer | 256..65535 | uint 16 | 0xcd
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number_integer | 65536..4294967295 | uint 32 | 0xce
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number_integer | 4294967296..18446744073709551615 | uint 64 | 0xcf
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number_unsigned | 0..127 | positive fixint | 0x00..0x7f
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number_unsigned | 128..255 | uint 8 | 0xcc
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number_unsigned | 256..65535 | uint 16 | 0xcd
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number_unsigned | 65536..4294967295 | uint 32 | 0xce
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number_unsigned | 4294967296..18446744073709551615 | uint 64 | 0xcf
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number_float | *any value* | float 64 | 0xcb
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string | *length*: 0..31 | fixstr | 0xa0..0xbf
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string | *length*: 32..255 | str 8 | 0xd9
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string | *length*: 256..65535 | str 16 | 0xda
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string | *length*: 65536..4294967295 | str 32 | 0xdb
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array | *size*: 0..15 | fixarray | 0x90..0x9f
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array | *size*: 16..65535 | array 16 | 0xdc
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array | *size*: 65536..4294967295 | array 32 | 0xdd
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object | *size*: 0..15 | fix map | 0x80..0x8f
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object | *size*: 16..65535 | map 16 | 0xde
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object | *size*: 65536..4294967295 | map 32 | 0xdf
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@note The mapping is **complete** in the sense that any JSON value type
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can be converted to a MessagePack value.
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@note The following values can **not** be converted to a MessagePack value:
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- strings with more than 4294967295 bytes
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- arrays with more than 4294967295 elements
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- objects with more than 4294967295 elements
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@note The following MessagePack types are not used in the conversion:
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- bin 8 - bin 32 (0xc4..0xc6)
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- ext 8 - ext 32 (0xc7..0xc9)
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- float 32 (0xca)
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- fixext 1 - fixext 16 (0xd4..0xd8)
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@param[in] j JSON value to serialize
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@return MessagePack serialization as byte vector
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@ -8878,6 +8927,65 @@ class basic_json
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serialization format which aims to be more compact than JSON itself, yet
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more efficient to parse.
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The library uses the following mapping from JSON values types to
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CBOR types according to the CBOR specification (RFC 7049):
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JSON value type | value/range | CBOR type | first byte
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--------------- | ------------------------------------------ | ---------------------------------- | ---------------
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null | `null` | Null | 0xf6
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boolean | `true` | True | 0xf5
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boolean | `false` | False | 0xf4
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number_integer | -9223372036854775808..-2147483649 | Negative integer (8 bytes follow) | 0x3b
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number_integer | -2147483648..-32769 | Negative integer (4 bytes follow) | 0x3a
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number_integer | -32768..-129 | Negative integer (2 bytes follow) | 0x39
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number_integer | -128..-25 | Negative integer (1 byte follow) | 0x38
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number_integer | -24..-1 | Negative integer | 0x20..0x37
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number_integer | 0..23 | Integer | 0x00..0x17
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number_integer | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_integer | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_integer | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1a
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number_integer | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1b
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number_unsigned | 0..23 | Integer | 0x00..0x17
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number_unsigned | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_unsigned | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_unsigned | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1a
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number_unsigned | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1b
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number_float | *any value* | Double-Precision Float | 0xfb
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string | *length*: 0..23 | UTF-8 string | 0x60..0x77
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string | *length*: 23..255 | UTF-8 string (1 byte follow) | 0x78
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string | *length*: 256..65535 | UTF-8 string (2 bytes follow) | 0x79
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string | *length*: 65536..4294967295 | UTF-8 string (4 bytes follow) | 0x7a
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string | *length*: 4294967296..18446744073709551615 | UTF-8 string (8 bytes follow) | 0x7b
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array | *size*: 0..23 | array | 0x80..0x97
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array | *size*: 23..255 | array (1 byte follow) | 0x98
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array | *size*: 256..65535 | array (2 bytes follow) | 0x99
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array | *size*: 65536..4294967295 | array (4 bytes follow) | 0x9a
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array | *size*: 4294967296..18446744073709551615 | array (8 bytes follow) | 0x9b
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object | *size*: 0..23 | map | 0xa0..0xb7
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object | *size*: 23..255 | map (1 byte follow) | 0xb8
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object | *size*: 256..65535 | map (2 bytes follow) | 0xb9
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object | *size*: 65536..4294967295 | map (4 bytes follow) | 0xba
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object | *size*: 4294967296..18446744073709551615 | map (8 bytes follow) | 0xbb
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@note The mapping is **complete** in the sense that any JSON value type
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can be converted to a CBOR value.
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@note The following CBOR types are not used in the conversion:
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- byte strings (0x40..0x5f)
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- UTF-8 strings terminated by "break" (0x7f)
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- arrays terminated by "break" (0x9f)
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- maps terminated by "break" (0xbf)
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- date/time (0xc0..0xc1)
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- bignum (0xc2..0xc3)
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- decimal fraction (0xc4)
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- bigfloat (0xc5)
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- tagged items (0xc6..0xd4, 0xd8..0xdb)
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- expected conversions (0xd5..0xd7)
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- simple values (0xe0..0xf3, 0xf8)
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- undefined (0xf7)
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- half and single-precision floats (0xf9-0xfa)
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- break (0xff)
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@param[in] j JSON value to serialize
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@return MessagePack serialization as byte vector
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@ -8815,6 +8815,55 @@ class basic_json
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serialization format. MessagePack is a binary serialization format which
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aims to be more compact than JSON itself, yet more efficient to parse.
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The library uses the following mapping from JSON values types to
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MessagePack types according to the MessagePack specification:
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JSON value type | value/range | MessagePack type | first byte
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--------------- | --------------------------------- | ---------------- | ----------
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null | `null` | nil | 0xc0
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boolean | `true` | true | 0xc3
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boolean | `false` | false | 0xc2
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number_integer | -9223372036854775808..-2147483649 | int64 | 0xd3
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number_integer | -2147483648..-32769 | int32 | 0xd2
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number_integer | -32768..-129 | int16 | 0xd1
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number_integer | -128..-33 | int8 | 0xd0
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number_integer | -32..-1 | negative fixint | 0xe0..0xff
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number_integer | 0..127 | positive fixint | 0x00..0x7f
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number_integer | 128..255 | uint 8 | 0xcc
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number_integer | 256..65535 | uint 16 | 0xcd
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number_integer | 65536..4294967295 | uint 32 | 0xce
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number_integer | 4294967296..18446744073709551615 | uint 64 | 0xcf
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number_unsigned | 0..127 | positive fixint | 0x00..0x7f
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number_unsigned | 128..255 | uint 8 | 0xcc
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number_unsigned | 256..65535 | uint 16 | 0xcd
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number_unsigned | 65536..4294967295 | uint 32 | 0xce
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number_unsigned | 4294967296..18446744073709551615 | uint 64 | 0xcf
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number_float | *any value* | float 64 | 0xcb
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string | *length*: 0..31 | fixstr | 0xa0..0xbf
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string | *length*: 32..255 | str 8 | 0xd9
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string | *length*: 256..65535 | str 16 | 0xda
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string | *length*: 65536..4294967295 | str 32 | 0xdb
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array | *size*: 0..15 | fixarray | 0x90..0x9f
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array | *size*: 16..65535 | array 16 | 0xdc
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array | *size*: 65536..4294967295 | array 32 | 0xdd
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object | *size*: 0..15 | fix map | 0x80..0x8f
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object | *size*: 16..65535 | map 16 | 0xde
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object | *size*: 65536..4294967295 | map 32 | 0xdf
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@note The mapping is **complete** in the sense that any JSON value type
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can be converted to a MessagePack value.
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@note The following values can **not** be converted to a MessagePack value:
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- strings with more than 4294967295 bytes
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- arrays with more than 4294967295 elements
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- objects with more than 4294967295 elements
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@note The following MessagePack types are not used in the conversion:
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- bin 8 - bin 32 (0xc4..0xc6)
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- ext 8 - ext 32 (0xc7..0xc9)
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- float 32 (0xca)
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- fixext 1 - fixext 16 (0xd4..0xd8)
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@param[in] j JSON value to serialize
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@return MessagePack serialization as byte vector
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@ -8878,6 +8927,65 @@ class basic_json
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serialization format which aims to be more compact than JSON itself, yet
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more efficient to parse.
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The library uses the following mapping from JSON values types to
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CBOR types according to the CBOR specification (RFC 7049):
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JSON value type | value/range | CBOR type | first byte
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--------------- | ------------------------------------------ | ---------------------------------- | ---------------
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null | `null` | Null | 0xf6
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boolean | `true` | True | 0xf5
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boolean | `false` | False | 0xf4
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number_integer | -9223372036854775808..-2147483649 | Negative integer (8 bytes follow) | 0x3b
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number_integer | -2147483648..-32769 | Negative integer (4 bytes follow) | 0x3a
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number_integer | -32768..-129 | Negative integer (2 bytes follow) | 0x39
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number_integer | -128..-25 | Negative integer (1 byte follow) | 0x38
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number_integer | -24..-1 | Negative integer | 0x20..0x37
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number_integer | 0..23 | Integer | 0x00..0x17
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number_integer | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_integer | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_integer | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1a
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number_integer | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1b
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number_unsigned | 0..23 | Integer | 0x00..0x17
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number_unsigned | 24..255 | Unsigned integer (1 byte follow) | 0x18
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number_unsigned | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
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number_unsigned | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1a
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number_unsigned | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1b
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number_float | *any value* | Double-Precision Float | 0xfb
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string | *length*: 0..23 | UTF-8 string | 0x60..0x77
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string | *length*: 23..255 | UTF-8 string (1 byte follow) | 0x78
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string | *length*: 256..65535 | UTF-8 string (2 bytes follow) | 0x79
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string | *length*: 65536..4294967295 | UTF-8 string (4 bytes follow) | 0x7a
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string | *length*: 4294967296..18446744073709551615 | UTF-8 string (8 bytes follow) | 0x7b
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array | *size*: 0..23 | array | 0x80..0x97
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array | *size*: 23..255 | array (1 byte follow) | 0x98
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array | *size*: 256..65535 | array (2 bytes follow) | 0x99
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array | *size*: 65536..4294967295 | array (4 bytes follow) | 0x9a
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array | *size*: 4294967296..18446744073709551615 | array (8 bytes follow) | 0x9b
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object | *size*: 0..23 | map | 0xa0..0xb7
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object | *size*: 23..255 | map (1 byte follow) | 0xb8
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object | *size*: 256..65535 | map (2 bytes follow) | 0xb9
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object | *size*: 65536..4294967295 | map (4 bytes follow) | 0xba
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object | *size*: 4294967296..18446744073709551615 | map (8 bytes follow) | 0xbb
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@note The mapping is **complete** in the sense that any JSON value type
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can be converted to a CBOR value.
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@note The following CBOR types are not used in the conversion:
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- byte strings (0x40..0x5f)
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- UTF-8 strings terminated by "break" (0x7f)
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- arrays terminated by "break" (0x9f)
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- maps terminated by "break" (0xbf)
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- date/time (0xc0..0xc1)
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- bignum (0xc2..0xc3)
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- decimal fraction (0xc4)
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- bigfloat (0xc5)
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- tagged items (0xc6..0xd4, 0xd8..0xdb)
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- expected conversions (0xd5..0xd7)
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- simple values (0xe0..0xf3, 0xf8)
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- undefined (0xf7)
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- half and single-precision floats (0xf9-0xfa)
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- break (0xff)
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@param[in] j JSON value to serialize
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@return MessagePack serialization as byte vector
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