forked from gitea/gitea
923 lines
20 KiB
Go
923 lines
20 KiB
Go
// Copyright (c) 2012-2015 Ugorji Nwoke. All rights reserved.
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// Use of this source code is governed by a MIT license found in the LICENSE file.
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package codec
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import (
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"math"
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"reflect"
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"time"
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)
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const bincDoPrune = true // No longer needed. Needed before as C lib did not support pruning.
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// vd as low 4 bits (there are 16 slots)
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const (
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bincVdSpecial byte = iota
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bincVdPosInt
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bincVdNegInt
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bincVdFloat
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bincVdString
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bincVdByteArray
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bincVdArray
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bincVdMap
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bincVdTimestamp
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bincVdSmallInt
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bincVdUnicodeOther
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bincVdSymbol
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bincVdDecimal
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_ // open slot
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_ // open slot
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bincVdCustomExt = 0x0f
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)
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const (
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bincSpNil byte = iota
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bincSpFalse
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bincSpTrue
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bincSpNan
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bincSpPosInf
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bincSpNegInf
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bincSpZeroFloat
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bincSpZero
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bincSpNegOne
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)
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const (
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bincFlBin16 byte = iota
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bincFlBin32
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_ // bincFlBin32e
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bincFlBin64
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_ // bincFlBin64e
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// others not currently supported
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)
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type bincEncDriver struct {
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e *Encoder
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w encWriter
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m map[string]uint16 // symbols
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b [scratchByteArrayLen]byte
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s uint16 // symbols sequencer
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encNoSeparator
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}
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func (e *bincEncDriver) IsBuiltinType(rt uintptr) bool {
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return rt == timeTypId
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}
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func (e *bincEncDriver) EncodeBuiltin(rt uintptr, v interface{}) {
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if rt == timeTypId {
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var bs []byte
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switch x := v.(type) {
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case time.Time:
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bs = encodeTime(x)
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case *time.Time:
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bs = encodeTime(*x)
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default:
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e.e.errorf("binc error encoding builtin: expect time.Time, received %T", v)
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}
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e.w.writen1(bincVdTimestamp<<4 | uint8(len(bs)))
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e.w.writeb(bs)
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}
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}
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func (e *bincEncDriver) EncodeNil() {
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e.w.writen1(bincVdSpecial<<4 | bincSpNil)
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}
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func (e *bincEncDriver) EncodeBool(b bool) {
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if b {
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e.w.writen1(bincVdSpecial<<4 | bincSpTrue)
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} else {
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e.w.writen1(bincVdSpecial<<4 | bincSpFalse)
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}
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}
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func (e *bincEncDriver) EncodeFloat32(f float32) {
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if f == 0 {
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e.w.writen1(bincVdSpecial<<4 | bincSpZeroFloat)
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return
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}
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e.w.writen1(bincVdFloat<<4 | bincFlBin32)
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bigenHelper{e.b[:4], e.w}.writeUint32(math.Float32bits(f))
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}
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func (e *bincEncDriver) EncodeFloat64(f float64) {
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if f == 0 {
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e.w.writen1(bincVdSpecial<<4 | bincSpZeroFloat)
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return
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}
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bigen.PutUint64(e.b[:8], math.Float64bits(f))
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if bincDoPrune {
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i := 7
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for ; i >= 0 && (e.b[i] == 0); i-- {
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}
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i++
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if i <= 6 {
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e.w.writen1(bincVdFloat<<4 | 0x8 | bincFlBin64)
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e.w.writen1(byte(i))
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e.w.writeb(e.b[:i])
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return
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}
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}
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e.w.writen1(bincVdFloat<<4 | bincFlBin64)
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e.w.writeb(e.b[:8])
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}
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func (e *bincEncDriver) encIntegerPrune(bd byte, pos bool, v uint64, lim uint8) {
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if lim == 4 {
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bigen.PutUint32(e.b[:lim], uint32(v))
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} else {
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bigen.PutUint64(e.b[:lim], v)
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}
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if bincDoPrune {
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i := pruneSignExt(e.b[:lim], pos)
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e.w.writen1(bd | lim - 1 - byte(i))
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e.w.writeb(e.b[i:lim])
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} else {
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e.w.writen1(bd | lim - 1)
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e.w.writeb(e.b[:lim])
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}
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}
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func (e *bincEncDriver) EncodeInt(v int64) {
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const nbd byte = bincVdNegInt << 4
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if v >= 0 {
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e.encUint(bincVdPosInt<<4, true, uint64(v))
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} else if v == -1 {
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e.w.writen1(bincVdSpecial<<4 | bincSpNegOne)
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} else {
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e.encUint(bincVdNegInt<<4, false, uint64(-v))
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}
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}
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func (e *bincEncDriver) EncodeUint(v uint64) {
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e.encUint(bincVdPosInt<<4, true, v)
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}
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func (e *bincEncDriver) encUint(bd byte, pos bool, v uint64) {
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if v == 0 {
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e.w.writen1(bincVdSpecial<<4 | bincSpZero)
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} else if pos && v >= 1 && v <= 16 {
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e.w.writen1(bincVdSmallInt<<4 | byte(v-1))
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} else if v <= math.MaxUint8 {
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e.w.writen2(bd|0x0, byte(v))
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} else if v <= math.MaxUint16 {
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e.w.writen1(bd | 0x01)
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bigenHelper{e.b[:2], e.w}.writeUint16(uint16(v))
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} else if v <= math.MaxUint32 {
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e.encIntegerPrune(bd, pos, v, 4)
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} else {
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e.encIntegerPrune(bd, pos, v, 8)
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}
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}
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func (e *bincEncDriver) EncodeExt(rv interface{}, xtag uint64, ext Ext, _ *Encoder) {
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bs := ext.WriteExt(rv)
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if bs == nil {
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e.EncodeNil()
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return
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}
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e.encodeExtPreamble(uint8(xtag), len(bs))
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e.w.writeb(bs)
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}
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func (e *bincEncDriver) EncodeRawExt(re *RawExt, _ *Encoder) {
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e.encodeExtPreamble(uint8(re.Tag), len(re.Data))
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e.w.writeb(re.Data)
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}
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func (e *bincEncDriver) encodeExtPreamble(xtag byte, length int) {
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e.encLen(bincVdCustomExt<<4, uint64(length))
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e.w.writen1(xtag)
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}
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func (e *bincEncDriver) EncodeArrayStart(length int) {
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e.encLen(bincVdArray<<4, uint64(length))
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}
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func (e *bincEncDriver) EncodeMapStart(length int) {
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e.encLen(bincVdMap<<4, uint64(length))
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}
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func (e *bincEncDriver) EncodeString(c charEncoding, v string) {
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l := uint64(len(v))
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e.encBytesLen(c, l)
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if l > 0 {
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e.w.writestr(v)
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}
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}
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func (e *bincEncDriver) EncodeSymbol(v string) {
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// if WriteSymbolsNoRefs {
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// e.encodeString(c_UTF8, v)
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// return
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// }
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//symbols only offer benefit when string length > 1.
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//This is because strings with length 1 take only 2 bytes to store
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//(bd with embedded length, and single byte for string val).
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l := len(v)
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if l == 0 {
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e.encBytesLen(c_UTF8, 0)
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return
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} else if l == 1 {
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e.encBytesLen(c_UTF8, 1)
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e.w.writen1(v[0])
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return
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}
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if e.m == nil {
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e.m = make(map[string]uint16, 16)
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}
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ui, ok := e.m[v]
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if ok {
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if ui <= math.MaxUint8 {
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e.w.writen2(bincVdSymbol<<4, byte(ui))
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} else {
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e.w.writen1(bincVdSymbol<<4 | 0x8)
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bigenHelper{e.b[:2], e.w}.writeUint16(ui)
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}
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} else {
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e.s++
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ui = e.s
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//ui = uint16(atomic.AddUint32(&e.s, 1))
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e.m[v] = ui
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var lenprec uint8
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if l <= math.MaxUint8 {
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// lenprec = 0
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} else if l <= math.MaxUint16 {
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lenprec = 1
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} else if int64(l) <= math.MaxUint32 {
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lenprec = 2
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} else {
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lenprec = 3
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}
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if ui <= math.MaxUint8 {
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e.w.writen2(bincVdSymbol<<4|0x0|0x4|lenprec, byte(ui))
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} else {
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e.w.writen1(bincVdSymbol<<4 | 0x8 | 0x4 | lenprec)
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bigenHelper{e.b[:2], e.w}.writeUint16(ui)
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}
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if lenprec == 0 {
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e.w.writen1(byte(l))
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} else if lenprec == 1 {
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bigenHelper{e.b[:2], e.w}.writeUint16(uint16(l))
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} else if lenprec == 2 {
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bigenHelper{e.b[:4], e.w}.writeUint32(uint32(l))
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} else {
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bigenHelper{e.b[:8], e.w}.writeUint64(uint64(l))
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}
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e.w.writestr(v)
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}
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}
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func (e *bincEncDriver) EncodeStringBytes(c charEncoding, v []byte) {
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l := uint64(len(v))
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e.encBytesLen(c, l)
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if l > 0 {
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e.w.writeb(v)
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}
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}
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func (e *bincEncDriver) encBytesLen(c charEncoding, length uint64) {
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//TODO: support bincUnicodeOther (for now, just use string or bytearray)
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if c == c_RAW {
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e.encLen(bincVdByteArray<<4, length)
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} else {
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e.encLen(bincVdString<<4, length)
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}
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}
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func (e *bincEncDriver) encLen(bd byte, l uint64) {
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if l < 12 {
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e.w.writen1(bd | uint8(l+4))
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} else {
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e.encLenNumber(bd, l)
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}
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}
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func (e *bincEncDriver) encLenNumber(bd byte, v uint64) {
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if v <= math.MaxUint8 {
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e.w.writen2(bd, byte(v))
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} else if v <= math.MaxUint16 {
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e.w.writen1(bd | 0x01)
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bigenHelper{e.b[:2], e.w}.writeUint16(uint16(v))
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} else if v <= math.MaxUint32 {
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e.w.writen1(bd | 0x02)
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bigenHelper{e.b[:4], e.w}.writeUint32(uint32(v))
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} else {
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e.w.writen1(bd | 0x03)
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bigenHelper{e.b[:8], e.w}.writeUint64(uint64(v))
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}
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}
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//------------------------------------
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type bincDecSymbol struct {
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s string
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b []byte
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i uint16
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}
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type bincDecDriver struct {
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d *Decoder
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h *BincHandle
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r decReader
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br bool // bytes reader
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bdRead bool
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bd byte
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vd byte
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vs byte
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noStreamingCodec
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decNoSeparator
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b [scratchByteArrayLen]byte
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// linear searching on this slice is ok,
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// because we typically expect < 32 symbols in each stream.
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s []bincDecSymbol
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}
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func (d *bincDecDriver) readNextBd() {
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d.bd = d.r.readn1()
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d.vd = d.bd >> 4
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d.vs = d.bd & 0x0f
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d.bdRead = true
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}
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func (d *bincDecDriver) ContainerType() (vt valueType) {
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if d.vd == bincVdSpecial && d.vs == bincSpNil {
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return valueTypeNil
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} else if d.vd == bincVdByteArray {
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return valueTypeBytes
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} else if d.vd == bincVdString {
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return valueTypeString
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} else if d.vd == bincVdArray {
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return valueTypeArray
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} else if d.vd == bincVdMap {
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return valueTypeMap
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} else {
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// d.d.errorf("isContainerType: unsupported parameter: %v", vt)
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}
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return valueTypeUnset
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}
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func (d *bincDecDriver) TryDecodeAsNil() bool {
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if !d.bdRead {
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d.readNextBd()
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}
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if d.bd == bincVdSpecial<<4|bincSpNil {
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d.bdRead = false
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return true
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}
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return false
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}
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func (d *bincDecDriver) IsBuiltinType(rt uintptr) bool {
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return rt == timeTypId
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}
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func (d *bincDecDriver) DecodeBuiltin(rt uintptr, v interface{}) {
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if !d.bdRead {
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d.readNextBd()
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}
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if rt == timeTypId {
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if d.vd != bincVdTimestamp {
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d.d.errorf("Invalid d.vd. Expecting 0x%x. Received: 0x%x", bincVdTimestamp, d.vd)
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return
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}
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tt, err := decodeTime(d.r.readx(int(d.vs)))
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if err != nil {
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panic(err)
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}
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var vt *time.Time = v.(*time.Time)
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*vt = tt
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d.bdRead = false
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}
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}
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func (d *bincDecDriver) decFloatPre(vs, defaultLen byte) {
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if vs&0x8 == 0 {
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d.r.readb(d.b[0:defaultLen])
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} else {
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l := d.r.readn1()
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if l > 8 {
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d.d.errorf("At most 8 bytes used to represent float. Received: %v bytes", l)
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return
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}
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for i := l; i < 8; i++ {
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d.b[i] = 0
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}
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d.r.readb(d.b[0:l])
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}
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}
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func (d *bincDecDriver) decFloat() (f float64) {
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//if true { f = math.Float64frombits(bigen.Uint64(d.r.readx(8))); break; }
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if x := d.vs & 0x7; x == bincFlBin32 {
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d.decFloatPre(d.vs, 4)
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f = float64(math.Float32frombits(bigen.Uint32(d.b[0:4])))
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} else if x == bincFlBin64 {
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d.decFloatPre(d.vs, 8)
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f = math.Float64frombits(bigen.Uint64(d.b[0:8]))
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} else {
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d.d.errorf("only float32 and float64 are supported. d.vd: 0x%x, d.vs: 0x%x", d.vd, d.vs)
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return
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}
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return
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}
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func (d *bincDecDriver) decUint() (v uint64) {
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// need to inline the code (interface conversion and type assertion expensive)
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switch d.vs {
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case 0:
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v = uint64(d.r.readn1())
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case 1:
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d.r.readb(d.b[6:8])
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v = uint64(bigen.Uint16(d.b[6:8]))
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case 2:
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d.b[4] = 0
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d.r.readb(d.b[5:8])
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v = uint64(bigen.Uint32(d.b[4:8]))
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case 3:
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d.r.readb(d.b[4:8])
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v = uint64(bigen.Uint32(d.b[4:8]))
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case 4, 5, 6:
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lim := int(7 - d.vs)
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d.r.readb(d.b[lim:8])
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for i := 0; i < lim; i++ {
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d.b[i] = 0
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}
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v = uint64(bigen.Uint64(d.b[:8]))
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case 7:
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d.r.readb(d.b[:8])
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v = uint64(bigen.Uint64(d.b[:8]))
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default:
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d.d.errorf("unsigned integers with greater than 64 bits of precision not supported")
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return
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}
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return
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}
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func (d *bincDecDriver) decCheckInteger() (ui uint64, neg bool) {
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if !d.bdRead {
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d.readNextBd()
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}
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vd, vs := d.vd, d.vs
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if vd == bincVdPosInt {
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ui = d.decUint()
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} else if vd == bincVdNegInt {
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ui = d.decUint()
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neg = true
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} else if vd == bincVdSmallInt {
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ui = uint64(d.vs) + 1
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} else if vd == bincVdSpecial {
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if vs == bincSpZero {
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//i = 0
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} else if vs == bincSpNegOne {
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neg = true
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ui = 1
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} else {
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d.d.errorf("numeric decode fails for special value: d.vs: 0x%x", d.vs)
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return
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}
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} else {
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d.d.errorf("number can only be decoded from uint or int values. d.bd: 0x%x, d.vd: 0x%x", d.bd, d.vd)
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return
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}
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return
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}
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func (d *bincDecDriver) DecodeInt(bitsize uint8) (i int64) {
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ui, neg := d.decCheckInteger()
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i, overflow := chkOvf.SignedInt(ui)
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if overflow {
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d.d.errorf("simple: overflow converting %v to signed integer", ui)
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return
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}
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if neg {
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i = -i
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}
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if chkOvf.Int(i, bitsize) {
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d.d.errorf("binc: overflow integer: %v", i)
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return
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}
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d.bdRead = false
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return
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}
|
|
|
|
func (d *bincDecDriver) DecodeUint(bitsize uint8) (ui uint64) {
|
|
ui, neg := d.decCheckInteger()
|
|
if neg {
|
|
d.d.errorf("Assigning negative signed value to unsigned type")
|
|
return
|
|
}
|
|
if chkOvf.Uint(ui, bitsize) {
|
|
d.d.errorf("binc: overflow integer: %v", ui)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) DecodeFloat(chkOverflow32 bool) (f float64) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
vd, vs := d.vd, d.vs
|
|
if vd == bincVdSpecial {
|
|
d.bdRead = false
|
|
if vs == bincSpNan {
|
|
return math.NaN()
|
|
} else if vs == bincSpPosInf {
|
|
return math.Inf(1)
|
|
} else if vs == bincSpZeroFloat || vs == bincSpZero {
|
|
return
|
|
} else if vs == bincSpNegInf {
|
|
return math.Inf(-1)
|
|
} else {
|
|
d.d.errorf("Invalid d.vs decoding float where d.vd=bincVdSpecial: %v", d.vs)
|
|
return
|
|
}
|
|
} else if vd == bincVdFloat {
|
|
f = d.decFloat()
|
|
} else {
|
|
f = float64(d.DecodeInt(64))
|
|
}
|
|
if chkOverflow32 && chkOvf.Float32(f) {
|
|
d.d.errorf("binc: float32 overflow: %v", f)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
// bool can be decoded from bool only (single byte).
|
|
func (d *bincDecDriver) DecodeBool() (b bool) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if bd := d.bd; bd == (bincVdSpecial | bincSpFalse) {
|
|
// b = false
|
|
} else if bd == (bincVdSpecial | bincSpTrue) {
|
|
b = true
|
|
} else {
|
|
d.d.errorf("Invalid single-byte value for bool: %s: %x", msgBadDesc, d.bd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) ReadMapStart() (length int) {
|
|
if d.vd != bincVdMap {
|
|
d.d.errorf("Invalid d.vd for map. Expecting 0x%x. Got: 0x%x", bincVdMap, d.vd)
|
|
return
|
|
}
|
|
length = d.decLen()
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) ReadArrayStart() (length int) {
|
|
if d.vd != bincVdArray {
|
|
d.d.errorf("Invalid d.vd for array. Expecting 0x%x. Got: 0x%x", bincVdArray, d.vd)
|
|
return
|
|
}
|
|
length = d.decLen()
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) decLen() int {
|
|
if d.vs > 3 {
|
|
return int(d.vs - 4)
|
|
}
|
|
return int(d.decLenNumber())
|
|
}
|
|
|
|
func (d *bincDecDriver) decLenNumber() (v uint64) {
|
|
if x := d.vs; x == 0 {
|
|
v = uint64(d.r.readn1())
|
|
} else if x == 1 {
|
|
d.r.readb(d.b[6:8])
|
|
v = uint64(bigen.Uint16(d.b[6:8]))
|
|
} else if x == 2 {
|
|
d.r.readb(d.b[4:8])
|
|
v = uint64(bigen.Uint32(d.b[4:8]))
|
|
} else {
|
|
d.r.readb(d.b[:8])
|
|
v = bigen.Uint64(d.b[:8])
|
|
}
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) decStringAndBytes(bs []byte, withString, zerocopy bool) (bs2 []byte, s string) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == bincVdSpecial<<4|bincSpNil {
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
var slen int = -1
|
|
// var ok bool
|
|
switch d.vd {
|
|
case bincVdString, bincVdByteArray:
|
|
slen = d.decLen()
|
|
if zerocopy {
|
|
if d.br {
|
|
bs2 = d.r.readx(slen)
|
|
} else if len(bs) == 0 {
|
|
bs2 = decByteSlice(d.r, slen, d.b[:])
|
|
} else {
|
|
bs2 = decByteSlice(d.r, slen, bs)
|
|
}
|
|
} else {
|
|
bs2 = decByteSlice(d.r, slen, bs)
|
|
}
|
|
if withString {
|
|
s = string(bs2)
|
|
}
|
|
case bincVdSymbol:
|
|
// zerocopy doesn't apply for symbols,
|
|
// as the values must be stored in a table for later use.
|
|
//
|
|
//from vs: extract numSymbolBytes, containsStringVal, strLenPrecision,
|
|
//extract symbol
|
|
//if containsStringVal, read it and put in map
|
|
//else look in map for string value
|
|
var symbol uint16
|
|
vs := d.vs
|
|
if vs&0x8 == 0 {
|
|
symbol = uint16(d.r.readn1())
|
|
} else {
|
|
symbol = uint16(bigen.Uint16(d.r.readx(2)))
|
|
}
|
|
if d.s == nil {
|
|
d.s = make([]bincDecSymbol, 0, 16)
|
|
}
|
|
|
|
if vs&0x4 == 0 {
|
|
for i := range d.s {
|
|
j := &d.s[i]
|
|
if j.i == symbol {
|
|
bs2 = j.b
|
|
if withString {
|
|
if j.s == "" && bs2 != nil {
|
|
j.s = string(bs2)
|
|
}
|
|
s = j.s
|
|
}
|
|
break
|
|
}
|
|
}
|
|
} else {
|
|
switch vs & 0x3 {
|
|
case 0:
|
|
slen = int(d.r.readn1())
|
|
case 1:
|
|
slen = int(bigen.Uint16(d.r.readx(2)))
|
|
case 2:
|
|
slen = int(bigen.Uint32(d.r.readx(4)))
|
|
case 3:
|
|
slen = int(bigen.Uint64(d.r.readx(8)))
|
|
}
|
|
// since using symbols, do not store any part of
|
|
// the parameter bs in the map, as it might be a shared buffer.
|
|
// bs2 = decByteSlice(d.r, slen, bs)
|
|
bs2 = decByteSlice(d.r, slen, nil)
|
|
if withString {
|
|
s = string(bs2)
|
|
}
|
|
d.s = append(d.s, bincDecSymbol{i: symbol, s: s, b: bs2})
|
|
}
|
|
default:
|
|
d.d.errorf("Invalid d.vd. Expecting string:0x%x, bytearray:0x%x or symbol: 0x%x. Got: 0x%x",
|
|
bincVdString, bincVdByteArray, bincVdSymbol, d.vd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) DecodeString() (s string) {
|
|
// DecodeBytes does not accomodate symbols, whose impl stores string version in map.
|
|
// Use decStringAndBytes directly.
|
|
// return string(d.DecodeBytes(d.b[:], true, true))
|
|
_, s = d.decStringAndBytes(d.b[:], true, true)
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) DecodeBytes(bs []byte, isstring, zerocopy bool) (bsOut []byte) {
|
|
if isstring {
|
|
bsOut, _ = d.decStringAndBytes(bs, false, zerocopy)
|
|
return
|
|
}
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.bd == bincVdSpecial<<4|bincSpNil {
|
|
d.bdRead = false
|
|
return nil
|
|
}
|
|
var clen int
|
|
if d.vd == bincVdString || d.vd == bincVdByteArray {
|
|
clen = d.decLen()
|
|
} else {
|
|
d.d.errorf("Invalid d.vd for bytes. Expecting string:0x%x or bytearray:0x%x. Got: 0x%x",
|
|
bincVdString, bincVdByteArray, d.vd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
if zerocopy {
|
|
if d.br {
|
|
return d.r.readx(clen)
|
|
} else if len(bs) == 0 {
|
|
bs = d.b[:]
|
|
}
|
|
}
|
|
return decByteSlice(d.r, clen, bs)
|
|
}
|
|
|
|
func (d *bincDecDriver) DecodeExt(rv interface{}, xtag uint64, ext Ext) (realxtag uint64) {
|
|
if xtag > 0xff {
|
|
d.d.errorf("decodeExt: 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 *bincDecDriver) decodeExtV(verifyTag bool, tag byte) (xtag byte, xbs []byte) {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
if d.vd == bincVdCustomExt {
|
|
l := d.decLen()
|
|
xtag = d.r.readn1()
|
|
if verifyTag && xtag != tag {
|
|
d.d.errorf("Wrong extension tag. Got %b. Expecting: %v", xtag, tag)
|
|
return
|
|
}
|
|
xbs = d.r.readx(l)
|
|
} else if d.vd == bincVdByteArray {
|
|
xbs = d.DecodeBytes(nil, false, true)
|
|
} else {
|
|
d.d.errorf("Invalid d.vd for extensions (Expecting extensions or byte array). Got: 0x%x", d.vd)
|
|
return
|
|
}
|
|
d.bdRead = false
|
|
return
|
|
}
|
|
|
|
func (d *bincDecDriver) DecodeNaked() {
|
|
if !d.bdRead {
|
|
d.readNextBd()
|
|
}
|
|
|
|
n := &d.d.n
|
|
var decodeFurther bool
|
|
|
|
switch d.vd {
|
|
case bincVdSpecial:
|
|
switch d.vs {
|
|
case bincSpNil:
|
|
n.v = valueTypeNil
|
|
case bincSpFalse:
|
|
n.v = valueTypeBool
|
|
n.b = false
|
|
case bincSpTrue:
|
|
n.v = valueTypeBool
|
|
n.b = true
|
|
case bincSpNan:
|
|
n.v = valueTypeFloat
|
|
n.f = math.NaN()
|
|
case bincSpPosInf:
|
|
n.v = valueTypeFloat
|
|
n.f = math.Inf(1)
|
|
case bincSpNegInf:
|
|
n.v = valueTypeFloat
|
|
n.f = math.Inf(-1)
|
|
case bincSpZeroFloat:
|
|
n.v = valueTypeFloat
|
|
n.f = float64(0)
|
|
case bincSpZero:
|
|
n.v = valueTypeUint
|
|
n.u = uint64(0) // int8(0)
|
|
case bincSpNegOne:
|
|
n.v = valueTypeInt
|
|
n.i = int64(-1) // int8(-1)
|
|
default:
|
|
d.d.errorf("decodeNaked: Unrecognized special value 0x%x", d.vs)
|
|
}
|
|
case bincVdSmallInt:
|
|
n.v = valueTypeUint
|
|
n.u = uint64(int8(d.vs)) + 1 // int8(d.vs) + 1
|
|
case bincVdPosInt:
|
|
n.v = valueTypeUint
|
|
n.u = d.decUint()
|
|
case bincVdNegInt:
|
|
n.v = valueTypeInt
|
|
n.i = -(int64(d.decUint()))
|
|
case bincVdFloat:
|
|
n.v = valueTypeFloat
|
|
n.f = d.decFloat()
|
|
case bincVdSymbol:
|
|
n.v = valueTypeSymbol
|
|
n.s = d.DecodeString()
|
|
case bincVdString:
|
|
n.v = valueTypeString
|
|
n.s = d.DecodeString()
|
|
case bincVdByteArray:
|
|
n.v = valueTypeBytes
|
|
n.l = d.DecodeBytes(nil, false, false)
|
|
case bincVdTimestamp:
|
|
n.v = valueTypeTimestamp
|
|
tt, err := decodeTime(d.r.readx(int(d.vs)))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
n.t = tt
|
|
case bincVdCustomExt:
|
|
n.v = valueTypeExt
|
|
l := d.decLen()
|
|
n.u = uint64(d.r.readn1())
|
|
n.l = d.r.readx(l)
|
|
case bincVdArray:
|
|
n.v = valueTypeArray
|
|
decodeFurther = true
|
|
case bincVdMap:
|
|
n.v = valueTypeMap
|
|
decodeFurther = true
|
|
default:
|
|
d.d.errorf("decodeNaked: Unrecognized d.vd: 0x%x", d.vd)
|
|
}
|
|
|
|
if !decodeFurther {
|
|
d.bdRead = false
|
|
}
|
|
if n.v == valueTypeUint && d.h.SignedInteger {
|
|
n.v = valueTypeInt
|
|
n.i = int64(n.u)
|
|
}
|
|
return
|
|
}
|
|
|
|
//------------------------------------
|
|
|
|
//BincHandle is a Handle for the Binc Schema-Free Encoding Format
|
|
//defined at https://github.com/ugorji/binc .
|
|
//
|
|
//BincHandle currently supports all Binc features with the following EXCEPTIONS:
|
|
// - only integers up to 64 bits of precision are supported.
|
|
// big integers are unsupported.
|
|
// - Only IEEE 754 binary32 and binary64 floats are supported (ie Go float32 and float64 types).
|
|
// extended precision and decimal IEEE 754 floats are unsupported.
|
|
// - Only UTF-8 strings supported.
|
|
// Unicode_Other Binc types (UTF16, UTF32) are currently unsupported.
|
|
//
|
|
//Note that these EXCEPTIONS are temporary and full support is possible and may happen soon.
|
|
type BincHandle struct {
|
|
BasicHandle
|
|
binaryEncodingType
|
|
}
|
|
|
|
func (h *BincHandle) SetBytesExt(rt reflect.Type, tag uint64, ext BytesExt) (err error) {
|
|
return h.SetExt(rt, tag, &setExtWrapper{b: ext})
|
|
}
|
|
|
|
func (h *BincHandle) newEncDriver(e *Encoder) encDriver {
|
|
return &bincEncDriver{e: e, w: e.w}
|
|
}
|
|
|
|
func (h *BincHandle) newDecDriver(d *Decoder) decDriver {
|
|
return &bincDecDriver{d: d, r: d.r, h: h, br: d.bytes}
|
|
}
|
|
|
|
func (e *bincEncDriver) reset() {
|
|
e.w = e.e.w
|
|
e.s = 0
|
|
e.m = nil
|
|
}
|
|
|
|
func (d *bincDecDriver) reset() {
|
|
d.r = d.d.r
|
|
d.s = nil
|
|
d.bd, d.bdRead, d.vd, d.vs = 0, false, 0, 0
|
|
}
|
|
|
|
var _ decDriver = (*bincDecDriver)(nil)
|
|
var _ encDriver = (*bincEncDriver)(nil)
|