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defs.go
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defs.go
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// This package is the support library for the msgp code generator (http://github.com/algorand/msgp).
//
// This package defines the utilites used by the msgp code generator for encoding and decoding MessagePack
// from []byte and io.Reader/io.Writer types. Much of this package is devoted to helping the msgp code
// generator implement the Marshaler/Unmarshaler and Encodable/Decodable interfaces.
//
// This package defines four "families" of functions:
// - AppendXxxx() appends an object to a []byte in MessagePack encoding.
// - ReadXxxxBytes() reads an object from a []byte and returns the remaining bytes.
// - (*Writer).WriteXxxx() writes an object to the buffered *Writer type.
// - (*Reader).ReadXxxx() reads an object from a buffered *Reader type.
//
// Once a type has satisfied the `Encodable` and `Decodable` interfaces,
// it can be written and read from arbitrary `io.Writer`s and `io.Reader`s using
// msgp.Encode(io.Writer, msgp.Encodable)
// and
// msgp.Decode(io.Reader, msgp.Decodable)
//
// There are also methods for converting MessagePack to JSON without
// an explicit de-serialization step.
//
// For additional tips, tricks, and gotchas, please visit
// the wiki at http://github.com/tinylib/msgp
package msgp
const last4 = 0x0f
const first4 = 0xf0
const last5 = 0x1f
const first3 = 0xe0
const last7 = 0x7f
func isfixint(b byte) bool {
return b>>7 == 0
}
func isnfixint(b byte) bool {
return b&first3 == mnfixint
}
func isfixmap(b byte) bool {
return b&first4 == mfixmap
}
func isfixarray(b byte) bool {
return b&first4 == mfixarray
}
func isfixstr(b byte) bool {
return b&first3 == mfixstr
}
func wfixint(u uint8) byte {
return u & last7
}
func rfixint(b byte) uint8 {
return b
}
func wnfixint(i int8) byte {
return byte(i) | mnfixint
}
func rnfixint(b byte) int8 {
return int8(b)
}
func rfixmap(b byte) uint8 {
return b & last4
}
func wfixmap(u uint8) byte {
return mfixmap | (u & last4)
}
func rfixstr(b byte) uint8 {
return b & last5
}
func wfixstr(u uint8) byte {
return (u & last5) | mfixstr
}
func rfixarray(b byte) uint8 {
return (b & last4)
}
func wfixarray(u uint8) byte {
return (u & last4) | mfixarray
}
// These are all the byte
// prefixes defined by the
// msgpack standard
const (
// 0XXXXXXX
mfixint uint8 = 0x00
// 111XXXXX
mnfixint uint8 = 0xe0
// 1000XXXX
mfixmap uint8 = 0x80
// 1001XXXX
mfixarray uint8 = 0x90
// 101XXXXX
mfixstr uint8 = 0xa0
mnil uint8 = 0xc0
mfalse uint8 = 0xc2
mtrue uint8 = 0xc3
mbin8 uint8 = 0xc4
mbin16 uint8 = 0xc5
mbin32 uint8 = 0xc6
mext8 uint8 = 0xc7
mext16 uint8 = 0xc8
mext32 uint8 = 0xc9
mfloat32 uint8 = 0xca
mfloat64 uint8 = 0xcb
muint8 uint8 = 0xcc
muint16 uint8 = 0xcd
muint32 uint8 = 0xce
muint64 uint8 = 0xcf
mint8 uint8 = 0xd0
mint16 uint8 = 0xd1
mint32 uint8 = 0xd2
mint64 uint8 = 0xd3
mfixext1 uint8 = 0xd4
mfixext2 uint8 = 0xd5
mfixext4 uint8 = 0xd6
mfixext8 uint8 = 0xd7
mfixext16 uint8 = 0xd8
mstr8 uint8 = 0xd9
mstr16 uint8 = 0xda
mstr32 uint8 = 0xdb
marray16 uint8 = 0xdc
marray32 uint8 = 0xdd
mmap16 uint8 = 0xde
mmap32 uint8 = 0xdf
)