QLwangqinghai / XON

Simple data interchange format

XON

Simple data interchange format

Types

Type(3Bit)	Layout(5Bit)	Sublayout	Meaning	Used For	Note
0	0	none	null	null
0	true=>1, false=>2	none	Bool	Bool
1	largeNumber=>0, NaN=>1, +INF=>2, -INF=>3, zero=>4, length[1, 27] => [5, 31]	none	Number	int8, uint8, int16, uint16, int32, uint32, int64, uint64, float, double	Coding consistency： Convert numbers to IEEE 754 floating-point numbers, INT64_MIN < e < INT64_MAX
2	InvalidTime=>0x0, DistantPast(-INF)=>0x1, DistantFuture(INF)=>0x2, LengthOfTime(in seconds)=>[0x3, 0xf]	none	Time	Integer time in seconds
2	(layout & 0x10) == 0x10, LengthOfTime(in seconds)=>[0x10, 0x1f]	8Bit Fractional Part Info	Time	Decimal time in seconds
3	count[0, 30] => [0, 30], if (count>=31) layout=31	layout==31, count = Varint63Decoding + 31	String	String(Utf8Encoding)	0 <= count <= INT64_MAX
4	count[0, 30] => [0, 30], if (count>=31) layout=31	layout==31, count = Varint63Decoding + 31	Bytes		0 <= count <= INT64_MAX
5	count[0, 30] => [0, 30], if (count>=31) layout=31	layout==31, count = Varint63Decoding + 31	Message	Map<UInt32, Value>	0 <= count <= UINT32_MAX - 1, Map traversal order is based on key from small to large
6	count[0, 30] => [0, 30], if (count>=31) layout=31	layout==31, count = Varint63Decoding + 31	Array	Array<Value>	0 <= count <= INT64_MAX

null

bytes = [0x0];

Bool

• true bytes = [0x1]

• false bytes = [0x2]

Number

• Support: NaN, +INF, -INF

• Coding consistency

  encode((float)1.0) == encode((double)1.0) == encode((uint)1) == encode((int)1) == encode((uint8)1) == encode((int8)1) == encode((uint16)1) == encode((int16)1) == encode((uint32)1) == encode((int32)1) == encode((uint64)1) == encode((int64)1)

Time

• The timing is accurate to attoseconds.
• invalidTime
• distantPast
• distantFuture