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encoder.go
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encoder.go
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package encoder
import (
"bytes"
"encoding"
"encoding/base64"
"encoding/json"
"fmt"
"math"
"reflect"
"strconv"
"strings"
"sync"
"unsafe"
"github.com/angenal/gf/internal/go-json/errors"
"github.com/angenal/gf/internal/go-json/runtime"
)
func (t OpType) IsMultipleOpHead() bool {
switch t {
case OpStructHead:
return true
case OpStructHeadSlice:
return true
case OpStructHeadArray:
return true
case OpStructHeadMap:
return true
case OpStructHeadStruct:
return true
case OpStructHeadOmitEmpty:
return true
case OpStructHeadOmitEmptySlice:
return true
case OpStructHeadOmitEmptyArray:
return true
case OpStructHeadOmitEmptyMap:
return true
case OpStructHeadOmitEmptyStruct:
return true
case OpStructHeadSlicePtr:
return true
case OpStructHeadOmitEmptySlicePtr:
return true
case OpStructHeadArrayPtr:
return true
case OpStructHeadOmitEmptyArrayPtr:
return true
case OpStructHeadMapPtr:
return true
case OpStructHeadOmitEmptyMapPtr:
return true
}
return false
}
func (t OpType) IsMultipleOpField() bool {
switch t {
case OpStructField:
return true
case OpStructFieldSlice:
return true
case OpStructFieldArray:
return true
case OpStructFieldMap:
return true
case OpStructFieldStruct:
return true
case OpStructFieldOmitEmpty:
return true
case OpStructFieldOmitEmptySlice:
return true
case OpStructFieldOmitEmptyArray:
return true
case OpStructFieldOmitEmptyMap:
return true
case OpStructFieldOmitEmptyStruct:
return true
case OpStructFieldSlicePtr:
return true
case OpStructFieldOmitEmptySlicePtr:
return true
case OpStructFieldArrayPtr:
return true
case OpStructFieldOmitEmptyArrayPtr:
return true
case OpStructFieldMapPtr:
return true
case OpStructFieldOmitEmptyMapPtr:
return true
}
return false
}
type OpcodeSet struct {
Type *runtime.Type
NoescapeKeyCode *Opcode
EscapeKeyCode *Opcode
InterfaceNoescapeKeyCode *Opcode
InterfaceEscapeKeyCode *Opcode
CodeLength int
EndCode *Opcode
Code Code
QueryCache map[string]*OpcodeSet
cacheMu sync.RWMutex
}
func (s *OpcodeSet) getQueryCache(hash string) *OpcodeSet {
s.cacheMu.RLock()
codeSet := s.QueryCache[hash]
s.cacheMu.RUnlock()
return codeSet
}
func (s *OpcodeSet) setQueryCache(hash string, codeSet *OpcodeSet) {
s.cacheMu.Lock()
s.QueryCache[hash] = codeSet
s.cacheMu.Unlock()
}
type CompiledCode struct {
Code *Opcode
Linked bool // whether recursive code already have linked
CurLen uintptr
NextLen uintptr
}
const StartDetectingCyclesAfter = 1000
func Load(base uintptr, idx uintptr) uintptr {
addr := base + idx
return **(**uintptr)(unsafe.Pointer(&addr))
}
func Store(base uintptr, idx uintptr, p uintptr) {
addr := base + idx
**(**uintptr)(unsafe.Pointer(&addr)) = p
}
func LoadNPtr(base uintptr, idx uintptr, ptrNum int) uintptr {
addr := base + idx
p := **(**uintptr)(unsafe.Pointer(&addr))
if p == 0 {
return 0
}
return PtrToPtr(p)
/*
for i := 0; i < ptrNum; i++ {
if p == 0 {
return p
}
p = PtrToPtr(p)
}
return p
*/
}
func PtrToUint64(p uintptr) uint64 { return **(**uint64)(unsafe.Pointer(&p)) }
func PtrToFloat32(p uintptr) float32 { return **(**float32)(unsafe.Pointer(&p)) }
func PtrToFloat64(p uintptr) float64 { return **(**float64)(unsafe.Pointer(&p)) }
func PtrToBool(p uintptr) bool { return **(**bool)(unsafe.Pointer(&p)) }
func PtrToBytes(p uintptr) []byte { return **(**[]byte)(unsafe.Pointer(&p)) }
func PtrToNumber(p uintptr) json.Number { return **(**json.Number)(unsafe.Pointer(&p)) }
func PtrToString(p uintptr) string { return **(**string)(unsafe.Pointer(&p)) }
func PtrToSlice(p uintptr) *runtime.SliceHeader { return *(**runtime.SliceHeader)(unsafe.Pointer(&p)) }
func PtrToPtr(p uintptr) uintptr {
return uintptr(**(**unsafe.Pointer)(unsafe.Pointer(&p)))
}
func PtrToNPtr(p uintptr, ptrNum int) uintptr {
for i := 0; i < ptrNum; i++ {
if p == 0 {
return 0
}
p = PtrToPtr(p)
}
return p
}
func PtrToUnsafePtr(p uintptr) unsafe.Pointer {
return *(*unsafe.Pointer)(unsafe.Pointer(&p))
}
func PtrToInterface(code *Opcode, p uintptr) interface{} {
return *(*interface{})(unsafe.Pointer(&emptyInterface{
typ: code.Type,
ptr: *(*unsafe.Pointer)(unsafe.Pointer(&p)),
}))
}
func ErrUnsupportedValue(code *Opcode, ptr uintptr) *errors.UnsupportedValueError {
v := *(*interface{})(unsafe.Pointer(&emptyInterface{
typ: code.Type,
ptr: *(*unsafe.Pointer)(unsafe.Pointer(&ptr)),
}))
return &errors.UnsupportedValueError{
Value: reflect.ValueOf(v),
Str: fmt.Sprintf("encountered a cycle via %s", code.Type),
}
}
func ErrUnsupportedFloat(v float64) *errors.UnsupportedValueError {
return &errors.UnsupportedValueError{
Value: reflect.ValueOf(v),
Str: strconv.FormatFloat(v, 'g', -1, 64),
}
}
func ErrMarshalerWithCode(code *Opcode, err error) *errors.MarshalerError {
return &errors.MarshalerError{
Type: runtime.RType2Type(code.Type),
Err: err,
}
}
type emptyInterface struct {
typ *runtime.Type
ptr unsafe.Pointer
}
type MapItem struct {
Key []byte
Value []byte
}
type Mapslice struct {
Items []MapItem
}
func (m *Mapslice) Len() int {
return len(m.Items)
}
func (m *Mapslice) Less(i, j int) bool {
return bytes.Compare(m.Items[i].Key, m.Items[j].Key) < 0
}
func (m *Mapslice) Swap(i, j int) {
m.Items[i], m.Items[j] = m.Items[j], m.Items[i]
}
//nolint:structcheck,unused
type mapIter struct {
key unsafe.Pointer
elem unsafe.Pointer
t unsafe.Pointer
h unsafe.Pointer
buckets unsafe.Pointer
bptr unsafe.Pointer
overflow unsafe.Pointer
oldoverflow unsafe.Pointer
startBucket uintptr
offset uint8
wrapped bool
B uint8
i uint8
bucket uintptr
checkBucket uintptr
}
type MapContext struct {
Start int
First int
Idx int
Slice *Mapslice
Buf []byte
Len int
Iter mapIter
}
var mapContextPool = sync.Pool{
New: func() interface{} {
return &MapContext{
Slice: &Mapslice{},
}
},
}
func NewMapContext(mapLen int, unorderedMap bool) *MapContext {
ctx := mapContextPool.Get().(*MapContext)
if !unorderedMap {
if len(ctx.Slice.Items) < mapLen {
ctx.Slice.Items = make([]MapItem, mapLen)
} else {
ctx.Slice.Items = ctx.Slice.Items[:mapLen]
}
}
ctx.Buf = ctx.Buf[:0]
ctx.Iter = mapIter{}
ctx.Idx = 0
ctx.Len = mapLen
return ctx
}
func ReleaseMapContext(c *MapContext) {
mapContextPool.Put(c)
}
//go:linkname MapIterInit runtime.mapiterinit
//go:noescape
func MapIterInit(mapType *runtime.Type, m unsafe.Pointer, it *mapIter)
//go:linkname MapIterKey reflect.mapiterkey
//go:noescape
func MapIterKey(it *mapIter) unsafe.Pointer
//go:linkname MapIterNext reflect.mapiternext
//go:noescape
func MapIterNext(it *mapIter)
//go:linkname MapLen reflect.maplen
//go:noescape
func MapLen(m unsafe.Pointer) int
func AppendByteSlice(_ *RuntimeContext, b []byte, src []byte) []byte {
if src == nil {
return append(b, `null`...)
}
encodedLen := base64.StdEncoding.EncodedLen(len(src))
b = append(b, '"')
pos := len(b)
remainLen := cap(b[pos:])
var buf []byte
if remainLen > encodedLen {
buf = b[pos : pos+encodedLen]
} else {
buf = make([]byte, encodedLen)
}
base64.StdEncoding.Encode(buf, src)
return append(append(b, buf...), '"')
}
func AppendFloat32(_ *RuntimeContext, b []byte, v float32) []byte {
f64 := float64(v)
abs := math.Abs(f64)
fmt := byte('f')
// Note: Must use float32 comparisons for underlying float32 value to get precise cutoffs right.
if abs != 0 {
f32 := float32(abs)
if f32 < 1e-6 || f32 >= 1e21 {
fmt = 'e'
}
}
return strconv.AppendFloat(b, f64, fmt, -1, 32)
}
func AppendFloat64(_ *RuntimeContext, b []byte, v float64) []byte {
abs := math.Abs(v)
fmt := byte('f')
// Note: Must use float32 comparisons for underlying float32 value to get precise cutoffs right.
if abs != 0 {
if abs < 1e-6 || abs >= 1e21 {
fmt = 'e'
}
}
return strconv.AppendFloat(b, v, fmt, -1, 64)
}
func AppendBool(_ *RuntimeContext, b []byte, v bool) []byte {
if v {
return append(b, "true"...)
}
return append(b, "false"...)
}
var (
floatTable = [256]bool{
'0': true,
'1': true,
'2': true,
'3': true,
'4': true,
'5': true,
'6': true,
'7': true,
'8': true,
'9': true,
'.': true,
'e': true,
'E': true,
'+': true,
'-': true,
}
)
func AppendNumber(_ *RuntimeContext, b []byte, n json.Number) ([]byte, error) {
if len(n) == 0 {
return append(b, '0'), nil
}
for i := 0; i < len(n); i++ {
if !floatTable[n[i]] {
return nil, fmt.Errorf("json: invalid number literal %q", n)
}
}
b = append(b, n...)
return b, nil
}
func AppendMarshalJSON(ctx *RuntimeContext, code *Opcode, b []byte, v interface{}) ([]byte, error) {
rv := reflect.ValueOf(v) // convert by dynamic interface type
if (code.Flags & AddrForMarshalerFlags) != 0 {
if rv.CanAddr() {
rv = rv.Addr()
} else {
newV := reflect.New(rv.Type())
newV.Elem().Set(rv)
rv = newV
}
}
v = rv.Interface()
var bb []byte
if (code.Flags & MarshalerContextFlags) != 0 {
marshaler, ok := v.(marshalerContext)
if !ok {
return AppendNull(ctx, b), nil
}
stdctx := ctx.Option.Context
if ctx.Option.Flag&FieldQueryOption != 0 {
stdctx = SetFieldQueryToContext(stdctx, code.FieldQuery)
}
b, err := marshaler.MarshalJSON(stdctx)
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
bb = b
} else {
marshaler, ok := v.(json.Marshaler)
if !ok {
return AppendNull(ctx, b), nil
}
b, err := marshaler.MarshalJSON()
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
bb = b
}
marshalBuf := ctx.MarshalBuf[:0]
marshalBuf = append(append(marshalBuf, bb...), nul)
compactedBuf, err := compact(b, marshalBuf, (ctx.Option.Flag&HTMLEscapeOption) != 0)
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
ctx.MarshalBuf = marshalBuf
return compactedBuf, nil
}
func AppendMarshalJSONIndent(ctx *RuntimeContext, code *Opcode, b []byte, v interface{}) ([]byte, error) {
rv := reflect.ValueOf(v) // convert by dynamic interface type
if (code.Flags & AddrForMarshalerFlags) != 0 {
if rv.CanAddr() {
rv = rv.Addr()
} else {
newV := reflect.New(rv.Type())
newV.Elem().Set(rv)
rv = newV
}
}
v = rv.Interface()
var bb []byte
if (code.Flags & MarshalerContextFlags) != 0 {
marshaler, ok := v.(marshalerContext)
if !ok {
return AppendNull(ctx, b), nil
}
b, err := marshaler.MarshalJSON(ctx.Option.Context)
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
bb = b
} else {
marshaler, ok := v.(json.Marshaler)
if !ok {
return AppendNull(ctx, b), nil
}
b, err := marshaler.MarshalJSON()
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
bb = b
}
marshalBuf := ctx.MarshalBuf[:0]
marshalBuf = append(append(marshalBuf, bb...), nul)
indentedBuf, err := doIndent(
b,
marshalBuf,
string(ctx.Prefix)+strings.Repeat(string(ctx.IndentStr), int(ctx.BaseIndent+code.Indent)),
string(ctx.IndentStr),
(ctx.Option.Flag&HTMLEscapeOption) != 0,
)
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
ctx.MarshalBuf = marshalBuf
return indentedBuf, nil
}
func AppendMarshalText(ctx *RuntimeContext, code *Opcode, b []byte, v interface{}) ([]byte, error) {
rv := reflect.ValueOf(v) // convert by dynamic interface type
if (code.Flags & AddrForMarshalerFlags) != 0 {
if rv.CanAddr() {
rv = rv.Addr()
} else {
newV := reflect.New(rv.Type())
newV.Elem().Set(rv)
rv = newV
}
}
v = rv.Interface()
marshaler, ok := v.(encoding.TextMarshaler)
if !ok {
return AppendNull(ctx, b), nil
}
bytes, err := marshaler.MarshalText()
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
return AppendString(ctx, b, *(*string)(unsafe.Pointer(&bytes))), nil
}
func AppendMarshalTextIndent(ctx *RuntimeContext, code *Opcode, b []byte, v interface{}) ([]byte, error) {
rv := reflect.ValueOf(v) // convert by dynamic interface type
if (code.Flags & AddrForMarshalerFlags) != 0 {
if rv.CanAddr() {
rv = rv.Addr()
} else {
newV := reflect.New(rv.Type())
newV.Elem().Set(rv)
rv = newV
}
}
v = rv.Interface()
marshaler, ok := v.(encoding.TextMarshaler)
if !ok {
return AppendNull(ctx, b), nil
}
bytes, err := marshaler.MarshalText()
if err != nil {
return nil, &errors.MarshalerError{Type: reflect.TypeOf(v), Err: err}
}
return AppendString(ctx, b, *(*string)(unsafe.Pointer(&bytes))), nil
}
func AppendNull(_ *RuntimeContext, b []byte) []byte {
return append(b, "null"...)
}
func AppendComma(_ *RuntimeContext, b []byte) []byte {
return append(b, ',')
}
func AppendCommaIndent(_ *RuntimeContext, b []byte) []byte {
return append(b, ',', '\n')
}
func AppendStructEnd(_ *RuntimeContext, b []byte) []byte {
return append(b, '}', ',')
}
func AppendStructEndIndent(ctx *RuntimeContext, code *Opcode, b []byte) []byte {
b = append(b, '\n')
b = append(b, ctx.Prefix...)
indentNum := ctx.BaseIndent + code.Indent - 1
for i := uint32(0); i < indentNum; i++ {
b = append(b, ctx.IndentStr...)
}
return append(b, '}', ',', '\n')
}
func AppendIndent(ctx *RuntimeContext, b []byte, indent uint32) []byte {
b = append(b, ctx.Prefix...)
indentNum := ctx.BaseIndent + indent
for i := uint32(0); i < indentNum; i++ {
b = append(b, ctx.IndentStr...)
}
return b
}
func IsNilForMarshaler(v interface{}) bool {
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Bool:
return !rv.Bool()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return rv.Int() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return rv.Uint() == 0
case reflect.Float32, reflect.Float64:
return math.Float64bits(rv.Float()) == 0
case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Func:
return rv.IsNil()
case reflect.Slice:
return rv.IsNil() || rv.Len() == 0
case reflect.String:
return rv.Len() == 0
}
return false
}