mirror of
https://github.com/42wim/matterbridge.git
synced 2024-11-29 06:02:01 -08:00
100 lines
3.4 KiB
Go
100 lines
3.4 KiB
Go
package msgp
|
|
|
|
// size of every object on the wire,
|
|
// plus type information. gives us
|
|
// constant-time type information
|
|
// for traversing composite objects.
|
|
//
|
|
var sizes = [256]bytespec{
|
|
mnil: {size: 1, extra: constsize, typ: NilType},
|
|
mfalse: {size: 1, extra: constsize, typ: BoolType},
|
|
mtrue: {size: 1, extra: constsize, typ: BoolType},
|
|
mbin8: {size: 2, extra: extra8, typ: BinType},
|
|
mbin16: {size: 3, extra: extra16, typ: BinType},
|
|
mbin32: {size: 5, extra: extra32, typ: BinType},
|
|
mext8: {size: 3, extra: extra8, typ: ExtensionType},
|
|
mext16: {size: 4, extra: extra16, typ: ExtensionType},
|
|
mext32: {size: 6, extra: extra32, typ: ExtensionType},
|
|
mfloat32: {size: 5, extra: constsize, typ: Float32Type},
|
|
mfloat64: {size: 9, extra: constsize, typ: Float64Type},
|
|
muint8: {size: 2, extra: constsize, typ: UintType},
|
|
muint16: {size: 3, extra: constsize, typ: UintType},
|
|
muint32: {size: 5, extra: constsize, typ: UintType},
|
|
muint64: {size: 9, extra: constsize, typ: UintType},
|
|
mint8: {size: 2, extra: constsize, typ: IntType},
|
|
mint16: {size: 3, extra: constsize, typ: IntType},
|
|
mint32: {size: 5, extra: constsize, typ: IntType},
|
|
mint64: {size: 9, extra: constsize, typ: IntType},
|
|
mfixext1: {size: 3, extra: constsize, typ: ExtensionType},
|
|
mfixext2: {size: 4, extra: constsize, typ: ExtensionType},
|
|
mfixext4: {size: 6, extra: constsize, typ: ExtensionType},
|
|
mfixext8: {size: 10, extra: constsize, typ: ExtensionType},
|
|
mfixext16: {size: 18, extra: constsize, typ: ExtensionType},
|
|
mstr8: {size: 2, extra: extra8, typ: StrType},
|
|
mstr16: {size: 3, extra: extra16, typ: StrType},
|
|
mstr32: {size: 5, extra: extra32, typ: StrType},
|
|
marray16: {size: 3, extra: array16v, typ: ArrayType},
|
|
marray32: {size: 5, extra: array32v, typ: ArrayType},
|
|
mmap16: {size: 3, extra: map16v, typ: MapType},
|
|
mmap32: {size: 5, extra: map32v, typ: MapType},
|
|
}
|
|
|
|
func init() {
|
|
// set up fixed fields
|
|
|
|
// fixint
|
|
for i := mfixint; i < 0x80; i++ {
|
|
sizes[i] = bytespec{size: 1, extra: constsize, typ: IntType}
|
|
}
|
|
|
|
// nfixint
|
|
for i := uint16(mnfixint); i < 0x100; i++ {
|
|
sizes[uint8(i)] = bytespec{size: 1, extra: constsize, typ: IntType}
|
|
}
|
|
|
|
// fixstr gets constsize,
|
|
// since the prefix yields the size
|
|
for i := mfixstr; i < 0xc0; i++ {
|
|
sizes[i] = bytespec{size: 1 + rfixstr(i), extra: constsize, typ: StrType}
|
|
}
|
|
|
|
// fixmap
|
|
for i := mfixmap; i < 0x90; i++ {
|
|
sizes[i] = bytespec{size: 1, extra: varmode(2 * rfixmap(i)), typ: MapType}
|
|
}
|
|
|
|
// fixarray
|
|
for i := mfixarray; i < 0xa0; i++ {
|
|
sizes[i] = bytespec{size: 1, extra: varmode(rfixarray(i)), typ: ArrayType}
|
|
}
|
|
}
|
|
|
|
// a valid bytespsec has
|
|
// non-zero 'size' and
|
|
// non-zero 'typ'
|
|
type bytespec struct {
|
|
size uint8 // prefix size information
|
|
extra varmode // extra size information
|
|
typ Type // type
|
|
_ byte // makes bytespec 4 bytes (yes, this matters)
|
|
}
|
|
|
|
// size mode
|
|
// if positive, # elements for composites
|
|
type varmode int8
|
|
|
|
const (
|
|
constsize varmode = 0 // constant size (size bytes + uint8(varmode) objects)
|
|
extra8 = -1 // has uint8(p[1]) extra bytes
|
|
extra16 = -2 // has be16(p[1:]) extra bytes
|
|
extra32 = -3 // has be32(p[1:]) extra bytes
|
|
map16v = -4 // use map16
|
|
map32v = -5 // use map32
|
|
array16v = -6 // use array16
|
|
array32v = -7 // use array32
|
|
)
|
|
|
|
func getType(v byte) Type {
|
|
return sizes[v].typ
|
|
}
|