mirror of
https://github.com/fnproject/fn.git
synced 2022-10-28 21:29:17 +03:00
8de5aef09d
* go modified fiddling with vendor got rid of the vendor directory revendored but with the exact same versions of things maybe better added mods for the images revendored using `GOFLAGS` instead of repeating my self vendor everything to the exact same commit hash as before and fixed ugorji Delete Deproxy.toml empty file cleaned up some file cleaned up some cruft get rid of some unused packages and exclude some Microsoft packages added flags to the variables that get pushed into docker in the makefile It works I suppose added noop excluded what we did not want even less hacky reverted to a version that has not been mangled * get rid of my experiment
661 lines
16 KiB
Go
661 lines
16 KiB
Go
// Copyright (c) 2012-2018 Ugorji Nwoke. All rights reserved.
|
|
// Use of this source code is governed by a MIT license found in the LICENSE file.
|
|
|
|
package codec
|
|
|
|
import (
|
|
"math"
|
|
"reflect"
|
|
"time"
|
|
)
|
|
|
|
const (
|
|
_ uint8 = iota
|
|
simpleVdNil = 1
|
|
simpleVdFalse = 2
|
|
simpleVdTrue = 3
|
|
simpleVdFloat32 = 4
|
|
simpleVdFloat64 = 5
|
|
|
|
// each lasts for 4 (ie n, n+1, n+2, n+3)
|
|
simpleVdPosInt = 8
|
|
simpleVdNegInt = 12
|
|
|
|
simpleVdTime = 24
|
|
|
|
// containers: each lasts for 4 (ie n, n+1, n+2, ... n+7)
|
|
simpleVdString = 216
|
|
simpleVdByteArray = 224
|
|
simpleVdArray = 232
|
|
simpleVdMap = 240
|
|
simpleVdExt = 248
|
|
)
|
|
|
|
type simpleEncDriver struct {
|
|
noBuiltInTypes
|
|
// encNoSeparator
|
|
e *Encoder
|
|
h *SimpleHandle
|
|
w encWriter
|
|
b [8]byte
|
|
// c containerState
|
|
encDriverTrackContainerWriter
|
|
// encDriverNoopContainerWriter
|
|
_ [3]uint64 // padding
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeNil() {
|
|
e.w.writen1(simpleVdNil)
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeBool(b bool) {
|
|
if e.h.EncZeroValuesAsNil && e.c != containerMapKey && !b {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
if b {
|
|
e.w.writen1(simpleVdTrue)
|
|
} else {
|
|
e.w.writen1(simpleVdFalse)
|
|
}
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeFloat32(f float32) {
|
|
if e.h.EncZeroValuesAsNil && e.c != containerMapKey && f == 0.0 {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
e.w.writen1(simpleVdFloat32)
|
|
bigenHelper{e.b[:4], e.w}.writeUint32(math.Float32bits(f))
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeFloat64(f float64) {
|
|
if e.h.EncZeroValuesAsNil && e.c != containerMapKey && f == 0.0 {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
e.w.writen1(simpleVdFloat64)
|
|
bigenHelper{e.b[:8], e.w}.writeUint64(math.Float64bits(f))
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeInt(v int64) {
|
|
if v < 0 {
|
|
e.encUint(uint64(-v), simpleVdNegInt)
|
|
} else {
|
|
e.encUint(uint64(v), simpleVdPosInt)
|
|
}
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeUint(v uint64) {
|
|
e.encUint(v, simpleVdPosInt)
|
|
}
|
|
|
|
func (e *simpleEncDriver) encUint(v uint64, bd uint8) {
|
|
if e.h.EncZeroValuesAsNil && e.c != containerMapKey && v == 0 {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
if v <= math.MaxUint8 {
|
|
e.w.writen2(bd, uint8(v))
|
|
} else if v <= math.MaxUint16 {
|
|
e.w.writen1(bd + 1)
|
|
bigenHelper{e.b[:2], e.w}.writeUint16(uint16(v))
|
|
} else if v <= math.MaxUint32 {
|
|
e.w.writen1(bd + 2)
|
|
bigenHelper{e.b[:4], e.w}.writeUint32(uint32(v))
|
|
} else { // if v <= math.MaxUint64 {
|
|
e.w.writen1(bd + 3)
|
|
bigenHelper{e.b[:8], e.w}.writeUint64(v)
|
|
}
|
|
}
|
|
|
|
func (e *simpleEncDriver) encLen(bd byte, length int) {
|
|
if length == 0 {
|
|
e.w.writen1(bd)
|
|
} else if length <= math.MaxUint8 {
|
|
e.w.writen1(bd + 1)
|
|
e.w.writen1(uint8(length))
|
|
} else if length <= math.MaxUint16 {
|
|
e.w.writen1(bd + 2)
|
|
bigenHelper{e.b[:2], e.w}.writeUint16(uint16(length))
|
|
} else if int64(length) <= math.MaxUint32 {
|
|
e.w.writen1(bd + 3)
|
|
bigenHelper{e.b[:4], e.w}.writeUint32(uint32(length))
|
|
} else {
|
|
e.w.writen1(bd + 4)
|
|
bigenHelper{e.b[:8], e.w}.writeUint64(uint64(length))
|
|
}
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeExt(rv interface{}, xtag uint64, ext Ext, _ *Encoder) {
|
|
bs := ext.WriteExt(rv)
|
|
if bs == nil {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
e.encodeExtPreamble(uint8(xtag), len(bs))
|
|
e.w.writeb(bs)
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeRawExt(re *RawExt, _ *Encoder) {
|
|
e.encodeExtPreamble(uint8(re.Tag), len(re.Data))
|
|
e.w.writeb(re.Data)
|
|
}
|
|
|
|
func (e *simpleEncDriver) encodeExtPreamble(xtag byte, length int) {
|
|
e.encLen(simpleVdExt, length)
|
|
e.w.writen1(xtag)
|
|
}
|
|
|
|
func (e *simpleEncDriver) WriteArrayStart(length int) {
|
|
e.c = containerArrayStart
|
|
e.encLen(simpleVdArray, length)
|
|
}
|
|
|
|
func (e *simpleEncDriver) WriteMapStart(length int) {
|
|
e.c = containerMapStart
|
|
e.encLen(simpleVdMap, length)
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeString(c charEncoding, v string) {
|
|
if false && e.h.EncZeroValuesAsNil && e.c != containerMapKey && v == "" {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
e.encLen(simpleVdString, len(v))
|
|
e.w.writestr(v)
|
|
}
|
|
|
|
// func (e *simpleEncDriver) EncodeSymbol(v string) {
|
|
// e.EncodeString(cUTF8, v)
|
|
// }
|
|
|
|
func (e *simpleEncDriver) EncodeStringBytes(c charEncoding, v []byte) {
|
|
// if e.h.EncZeroValuesAsNil && e.c != containerMapKey && v == nil {
|
|
if v == nil {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
e.encLen(simpleVdByteArray, len(v))
|
|
e.w.writeb(v)
|
|
}
|
|
|
|
func (e *simpleEncDriver) EncodeTime(t time.Time) {
|
|
// if e.h.EncZeroValuesAsNil && e.c != containerMapKey && t.IsZero() {
|
|
if t.IsZero() {
|
|
e.EncodeNil()
|
|
return
|
|
}
|
|
v, err := t.MarshalBinary()
|
|
if err != nil {
|
|
e.e.errorv(err)
|
|
return
|
|
}
|
|
// time.Time marshalbinary takes about 14 bytes.
|
|
e.w.writen2(simpleVdTime, uint8(len(v)))
|
|
e.w.writeb(v)
|
|
}
|
|
|
|
//------------------------------------
|
|
|
|
type simpleDecDriver struct {
|
|
d *Decoder
|
|
h *SimpleHandle
|
|
r decReader
|
|
bdRead bool
|
|
bd byte
|
|
br bool // a bytes reader?
|
|
c containerState
|
|
// b [scratchByteArrayLen]byte
|
|
noBuiltInTypes
|
|
// noStreamingCodec
|
|
decDriverNoopContainerReader
|
|
// _ [3]uint64 // padding
|
|
}
|
|
|
|
func (d *simpleDecDriver) readNextBd() {
|
|
d.bd = d.r.readn1()
|
|
d.bdRead = true
|
|
}
|
|
|
|
func (d *simpleDecDriver) uncacheRead() {
|
|
if d.bdRead {
|
|
d.r.unreadn1()
|
|
d.bdRead = false
|
|
}
|
|
}
|
|
|
|
func (d *simpleDecDriver) ContainerType() (vt valueType) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
switch d.bd {
|
|
case simpleVdNil:
|
|
return valueTypeNil
|
|
case simpleVdByteArray, simpleVdByteArray + 1,
|
|
simpleVdByteArray + 2, simpleVdByteArray + 3, simpleVdByteArray + 4:
|
|
return valueTypeBytes
|
|
case simpleVdString, simpleVdString + 1,
|
|
simpleVdString + 2, simpleVdString + 3, simpleVdString + 4:
|
|
return valueTypeString
|
|
case simpleVdArray, simpleVdArray + 1,
|
|
simpleVdArray + 2, simpleVdArray + 3, simpleVdArray + 4:
|
|
return valueTypeArray
|
|
case simpleVdMap, simpleVdMap + 1,
|
|
simpleVdMap + 2, simpleVdMap + 3, simpleVdMap + 4:
|
|
return valueTypeMap
|
|
// case simpleVdTime:
|
|
// return valueTypeTime
|
|
}
|
|
// else {
|
|
// d.d.errorf("isContainerType: unsupported parameter: %v", vt)
|
|
// }
|
|
return valueTypeUnset
|
|
}
|
|
|
|
func (d *simpleDecDriver) TryDecodeAsNil() bool {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == simpleVdNil {
|
|
d.bdRead = false
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (d *simpleDecDriver) decCheckInteger() (ui uint64, neg bool) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
switch d.bd {
|
|
case simpleVdPosInt:
|
|
ui = uint64(d.r.readn1())
|
|
case simpleVdPosInt + 1:
|
|
ui = uint64(bigen.Uint16(d.r.readx(2)))
|
|
case simpleVdPosInt + 2:
|
|
ui = uint64(bigen.Uint32(d.r.readx(4)))
|
|
case simpleVdPosInt + 3:
|
|
ui = uint64(bigen.Uint64(d.r.readx(8)))
|
|
case simpleVdNegInt:
|
|
ui = uint64(d.r.readn1())
|
|
neg = true
|
|
case simpleVdNegInt + 1:
|
|
ui = uint64(bigen.Uint16(d.r.readx(2)))
|
|
neg = true
|
|
case simpleVdNegInt + 2:
|
|
ui = uint64(bigen.Uint32(d.r.readx(4)))
|
|
neg = true
|
|
case simpleVdNegInt + 3:
|
|
ui = uint64(bigen.Uint64(d.r.readx(8)))
|
|
neg = true
|
|
default:
|
|
d.d.errorf("integer only valid from pos/neg integer1..8. Invalid descriptor: %v", d.bd)
|
|
return
|
|
}
|
|
// don't do this check, because callers may only want the unsigned value.
|
|
// if ui > math.MaxInt64 {
|
|
// d.d.errorf("decIntAny: Integer out of range for signed int64: %v", ui)
|
|
// return
|
|
// }
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeInt64() (i int64) {
|
|
ui, neg := d.decCheckInteger()
|
|
i = chkOvf.SignedIntV(ui)
|
|
if neg {
|
|
i = -i
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeUint64() (ui uint64) {
|
|
ui, neg := d.decCheckInteger()
|
|
if neg {
|
|
d.d.errorf("assigning negative signed value to unsigned type")
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeFloat64() (f float64) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == simpleVdFloat32 {
|
|
f = float64(math.Float32frombits(bigen.Uint32(d.r.readx(4))))
|
|
} else if d.bd == simpleVdFloat64 {
|
|
f = math.Float64frombits(bigen.Uint64(d.r.readx(8)))
|
|
} else {
|
|
if d.bd >= simpleVdPosInt && d.bd <= simpleVdNegInt+3 {
|
|
f = float64(d.DecodeInt64())
|
|
} else {
|
|
d.d.errorf("float only valid from float32/64: Invalid descriptor: %v", d.bd)
|
|
return
|
|
}
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
// bool can be decoded from bool only (single byte).
|
|
func (d *simpleDecDriver) DecodeBool() (b bool) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == simpleVdTrue {
|
|
b = true
|
|
} else if d.bd == simpleVdFalse {
|
|
} else {
|
|
d.d.errorf("cannot decode bool - %s: %x", msgBadDesc, d.bd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadMapStart() (length int) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
d.bdRead = false
|
|
d.c = containerMapStart
|
|
return d.decLen()
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadArrayStart() (length int) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
d.bdRead = false
|
|
d.c = containerArrayStart
|
|
return d.decLen()
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadArrayElem() {
|
|
d.c = containerArrayElem
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadArrayEnd() {
|
|
d.c = containerArrayEnd
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadMapElemKey() {
|
|
d.c = containerMapKey
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadMapElemValue() {
|
|
d.c = containerMapValue
|
|
}
|
|
|
|
func (d *simpleDecDriver) ReadMapEnd() {
|
|
d.c = containerMapEnd
|
|
}
|
|
|
|
func (d *simpleDecDriver) decLen() int {
|
|
switch d.bd % 8 {
|
|
case 0:
|
|
return 0
|
|
case 1:
|
|
return int(d.r.readn1())
|
|
case 2:
|
|
return int(bigen.Uint16(d.r.readx(2)))
|
|
case 3:
|
|
ui := uint64(bigen.Uint32(d.r.readx(4)))
|
|
if chkOvf.Uint(ui, intBitsize) {
|
|
d.d.errorf("overflow integer: %v", ui)
|
|
return 0
|
|
}
|
|
return int(ui)
|
|
case 4:
|
|
ui := bigen.Uint64(d.r.readx(8))
|
|
if chkOvf.Uint(ui, intBitsize) {
|
|
d.d.errorf("overflow integer: %v", ui)
|
|
return 0
|
|
}
|
|
return int(ui)
|
|
}
|
|
d.d.errorf("cannot read length: bd%%8 must be in range 0..4. Got: %d", d.bd%8)
|
|
return -1
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeString() (s string) {
|
|
return string(d.DecodeBytes(d.d.b[:], true))
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeStringAsBytes() (s []byte) {
|
|
return d.DecodeBytes(d.d.b[:], true)
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeBytes(bs []byte, zerocopy bool) (bsOut []byte) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == simpleVdNil {
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
// check if an "array" of uint8's (see ContainerType for how to infer if an array)
|
|
if d.bd >= simpleVdArray && d.bd <= simpleVdMap+4 {
|
|
if len(bs) == 0 && zerocopy {
|
|
bs = d.d.b[:]
|
|
}
|
|
bsOut, _ = fastpathTV.DecSliceUint8V(bs, true, d.d)
|
|
return
|
|
}
|
|
|
|
clen := d.decLen()
|
|
d.bdRead = false
|
|
if zerocopy {
|
|
if d.br {
|
|
return d.r.readx(clen)
|
|
} else if len(bs) == 0 {
|
|
bs = d.d.b[:]
|
|
}
|
|
}
|
|
return decByteSlice(d.r, clen, d.d.h.MaxInitLen, bs)
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeTime() (t time.Time) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == simpleVdNil {
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
if d.bd != simpleVdTime {
|
|
d.d.errorf("invalid descriptor for time.Time - expect 0x%x, received 0x%x", simpleVdTime, d.bd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
clen := int(d.r.readn1())
|
|
b := d.r.readx(clen)
|
|
if err := (&t).UnmarshalBinary(b); err != nil {
|
|
d.d.errorv(err)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeExt(rv interface{}, xtag uint64, ext Ext) (realxtag uint64) {
|
|
if xtag > 0xff {
|
|
d.d.errorf("ext: tag must be <= 0xff; got: %v", xtag)
|
|
return
|
|
}
|
|
realxtag1, xbs := d.decodeExtV(ext != nil, uint8(xtag))
|
|
realxtag = uint64(realxtag1)
|
|
if ext == nil {
|
|
re := rv.(*RawExt)
|
|
re.Tag = realxtag
|
|
re.Data = detachZeroCopyBytes(d.br, re.Data, xbs)
|
|
} else {
|
|
ext.ReadExt(rv, xbs)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) decodeExtV(verifyTag bool, tag byte) (xtag byte, xbs []byte) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
switch d.bd {
|
|
case simpleVdExt, simpleVdExt + 1, simpleVdExt + 2, simpleVdExt + 3, simpleVdExt + 4:
|
|
l := d.decLen()
|
|
xtag = d.r.readn1()
|
|
if verifyTag && xtag != tag {
|
|
d.d.errorf("wrong extension tag. Got %b. Expecting: %v", xtag, tag)
|
|
return
|
|
}
|
|
if d.br {
|
|
xbs = d.r.readx(l)
|
|
} else {
|
|
xbs = decByteSlice(d.r, l, d.d.h.MaxInitLen, d.d.b[:])
|
|
}
|
|
case simpleVdByteArray, simpleVdByteArray + 1,
|
|
simpleVdByteArray + 2, simpleVdByteArray + 3, simpleVdByteArray + 4:
|
|
xbs = d.DecodeBytes(nil, true)
|
|
default:
|
|
d.d.errorf("ext - %s - expecting extensions/bytearray, got: 0x%x", msgBadDesc, d.bd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *simpleDecDriver) DecodeNaked() {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
|
|
n := d.d.n
|
|
var decodeFurther bool
|
|
|
|
switch d.bd {
|
|
case simpleVdNil:
|
|
n.v = valueTypeNil
|
|
case simpleVdFalse:
|
|
n.v = valueTypeBool
|
|
n.b = false
|
|
case simpleVdTrue:
|
|
n.v = valueTypeBool
|
|
n.b = true
|
|
case simpleVdPosInt, simpleVdPosInt + 1, simpleVdPosInt + 2, simpleVdPosInt + 3:
|
|
if d.h.SignedInteger {
|
|
n.v = valueTypeInt
|
|
n.i = d.DecodeInt64()
|
|
} else {
|
|
n.v = valueTypeUint
|
|
n.u = d.DecodeUint64()
|
|
}
|
|
case simpleVdNegInt, simpleVdNegInt + 1, simpleVdNegInt + 2, simpleVdNegInt + 3:
|
|
n.v = valueTypeInt
|
|
n.i = d.DecodeInt64()
|
|
case simpleVdFloat32:
|
|
n.v = valueTypeFloat
|
|
n.f = d.DecodeFloat64()
|
|
case simpleVdFloat64:
|
|
n.v = valueTypeFloat
|
|
n.f = d.DecodeFloat64()
|
|
case simpleVdTime:
|
|
n.v = valueTypeTime
|
|
n.t = d.DecodeTime()
|
|
case simpleVdString, simpleVdString + 1,
|
|
simpleVdString + 2, simpleVdString + 3, simpleVdString + 4:
|
|
n.v = valueTypeString
|
|
n.s = d.DecodeString()
|
|
case simpleVdByteArray, simpleVdByteArray + 1,
|
|
simpleVdByteArray + 2, simpleVdByteArray + 3, simpleVdByteArray + 4:
|
|
n.v = valueTypeBytes
|
|
n.l = d.DecodeBytes(nil, false)
|
|
case simpleVdExt, simpleVdExt + 1, simpleVdExt + 2, simpleVdExt + 3, simpleVdExt + 4:
|
|
n.v = valueTypeExt
|
|
l := d.decLen()
|
|
n.u = uint64(d.r.readn1())
|
|
if d.br {
|
|
n.l = d.r.readx(l)
|
|
} else {
|
|
n.l = decByteSlice(d.r, l, d.d.h.MaxInitLen, d.d.b[:])
|
|
}
|
|
case simpleVdArray, simpleVdArray + 1, simpleVdArray + 2,
|
|
simpleVdArray + 3, simpleVdArray + 4:
|
|
n.v = valueTypeArray
|
|
decodeFurther = true
|
|
case simpleVdMap, simpleVdMap + 1, simpleVdMap + 2, simpleVdMap + 3, simpleVdMap + 4:
|
|
n.v = valueTypeMap
|
|
decodeFurther = true
|
|
default:
|
|
d.d.errorf("cannot infer value - %s 0x%x", msgBadDesc, d.bd)
|
|
}
|
|
|
|
if !decodeFurther {
|
|
d.bdRead = false
|
|
}
|
|
return
|
|
}
|
|
|
|
//------------------------------------
|
|
|
|
// SimpleHandle is a Handle for a very simple encoding format.
|
|
//
|
|
// simple is a simplistic codec similar to binc, but not as compact.
|
|
// - Encoding of a value is always preceded by the descriptor byte (bd)
|
|
// - True, false, nil are encoded fully in 1 byte (the descriptor)
|
|
// - Integers (intXXX, uintXXX) are encoded in 1, 2, 4 or 8 bytes (plus a descriptor byte).
|
|
// There are positive (uintXXX and intXXX >= 0) and negative (intXXX < 0) integers.
|
|
// - Floats are encoded in 4 or 8 bytes (plus a descriptor byte)
|
|
// - Length of containers (strings, bytes, array, map, extensions)
|
|
// are encoded in 0, 1, 2, 4 or 8 bytes.
|
|
// Zero-length containers have no length encoded.
|
|
// For others, the number of bytes is given by pow(2, bd%3)
|
|
// - maps are encoded as [bd] [length] [[key][value]]...
|
|
// - arrays are encoded as [bd] [length] [value]...
|
|
// - extensions are encoded as [bd] [length] [tag] [byte]...
|
|
// - strings/bytearrays are encoded as [bd] [length] [byte]...
|
|
// - time.Time are encoded as [bd] [length] [byte]...
|
|
//
|
|
// The full spec will be published soon.
|
|
type SimpleHandle struct {
|
|
BasicHandle
|
|
binaryEncodingType
|
|
noElemSeparators
|
|
// EncZeroValuesAsNil says to encode zero values for numbers, bool, string, etc as nil
|
|
EncZeroValuesAsNil bool
|
|
|
|
// _ [1]uint64 // padding
|
|
}
|
|
|
|
// Name returns the name of the handle: simple
|
|
func (h *SimpleHandle) Name() string { return "simple" }
|
|
|
|
// SetBytesExt sets an extension
|
|
func (h *SimpleHandle) SetBytesExt(rt reflect.Type, tag uint64, ext BytesExt) (err error) {
|
|
return h.SetExt(rt, tag, &extWrapper{ext, interfaceExtFailer{}})
|
|
}
|
|
|
|
func (h *SimpleHandle) hasElemSeparators() bool { return true } // as it implements Write(Map|Array)XXX
|
|
|
|
func (h *SimpleHandle) newEncDriver(e *Encoder) encDriver {
|
|
return &simpleEncDriver{e: e, w: e.w, h: h}
|
|
}
|
|
|
|
func (h *SimpleHandle) newDecDriver(d *Decoder) decDriver {
|
|
return &simpleDecDriver{d: d, h: h, r: d.r, br: d.bytes}
|
|
}
|
|
|
|
func (e *simpleEncDriver) reset() {
|
|
e.c = 0
|
|
e.w = e.e.w
|
|
}
|
|
|
|
func (d *simpleDecDriver) reset() {
|
|
d.c = 0
|
|
d.r, d.br = d.d.r, d.d.bytes
|
|
d.bd, d.bdRead = 0, false
|
|
}
|
|
|
|
var _ decDriver = (*simpleDecDriver)(nil)
|
|
var _ encDriver = (*simpleEncDriver)(nil)
|