forked from mirror/go-json
931 lines
24 KiB
Go
931 lines
24 KiB
Go
package json
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"unsafe"
|
|
)
|
|
|
|
func (e *Encoder) compileHead(typ *rtype, withIndent bool) (*opcode, error) {
|
|
root := true
|
|
switch {
|
|
case typ.Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
case typ.Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
isPtr := false
|
|
if typ.Kind() == reflect.Ptr {
|
|
typ = typ.Elem()
|
|
isPtr = true
|
|
}
|
|
if typ.Kind() == reflect.Map {
|
|
return e.compileMap(typ, isPtr, root, withIndent)
|
|
} else if typ.Kind() == reflect.Struct {
|
|
return e.compileStruct(typ, isPtr, root, withIndent)
|
|
}
|
|
return e.compile(typ, root, withIndent)
|
|
}
|
|
|
|
func (e *Encoder) implementsMarshaler(typ *rtype) bool {
|
|
switch {
|
|
case typ.Implements(marshalJSONType):
|
|
return true
|
|
case rtype_ptrTo(typ).Implements(marshalJSONType):
|
|
return true
|
|
case typ.Implements(marshalTextType):
|
|
return true
|
|
case rtype_ptrTo(typ).Implements(marshalTextType):
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (e *Encoder) compile(typ *rtype, root, withIndent bool) (*opcode, error) {
|
|
switch {
|
|
case typ.Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
case typ.Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
switch typ.Kind() {
|
|
case reflect.Ptr:
|
|
return e.compilePtr(typ, root, withIndent)
|
|
case reflect.Slice:
|
|
elem := typ.Elem()
|
|
if !e.implementsMarshaler(elem) && elem.Kind() == reflect.Uint8 {
|
|
return e.compileBytes(typ)
|
|
}
|
|
return e.compileSlice(typ, root, withIndent)
|
|
case reflect.Array:
|
|
return e.compileArray(typ, root, withIndent)
|
|
case reflect.Map:
|
|
return e.compileMap(typ, true, root, withIndent)
|
|
case reflect.Struct:
|
|
return e.compileStruct(typ, false, root, withIndent)
|
|
case reflect.Interface:
|
|
return e.compileInterface(typ, root)
|
|
case reflect.Int:
|
|
return e.compileInt(typ)
|
|
case reflect.Int8:
|
|
return e.compileInt8(typ)
|
|
case reflect.Int16:
|
|
return e.compileInt16(typ)
|
|
case reflect.Int32:
|
|
return e.compileInt32(typ)
|
|
case reflect.Int64:
|
|
return e.compileInt64(typ)
|
|
case reflect.Uint:
|
|
return e.compileUint(typ)
|
|
case reflect.Uint8:
|
|
return e.compileUint8(typ)
|
|
case reflect.Uint16:
|
|
return e.compileUint16(typ)
|
|
case reflect.Uint32:
|
|
return e.compileUint32(typ)
|
|
case reflect.Uint64:
|
|
return e.compileUint64(typ)
|
|
case reflect.Uintptr:
|
|
return e.compileUint(typ)
|
|
case reflect.Float32:
|
|
return e.compileFloat32(typ)
|
|
case reflect.Float64:
|
|
return e.compileFloat64(typ)
|
|
case reflect.String:
|
|
return e.compileString(typ)
|
|
case reflect.Bool:
|
|
return e.compileBool(typ)
|
|
}
|
|
return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
|
|
}
|
|
|
|
func (e *Encoder) compileKey(typ *rtype, root, withIndent bool) (*opcode, error) {
|
|
switch {
|
|
case typ.Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalJSONType):
|
|
return newOpCode(opMarshalJSON, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
case typ.Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, typ, e.indent, newEndOp(e.indent)), nil
|
|
case rtype_ptrTo(typ).Implements(marshalTextType):
|
|
return newOpCode(opMarshalText, rtype_ptrTo(typ), e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
switch typ.Kind() {
|
|
case reflect.Ptr:
|
|
return e.compilePtr(typ, root, withIndent)
|
|
case reflect.Interface:
|
|
return e.compileInterface(typ, root)
|
|
case reflect.Int:
|
|
return e.compileInt(typ)
|
|
case reflect.Int8:
|
|
return e.compileInt8(typ)
|
|
case reflect.Int16:
|
|
return e.compileInt16(typ)
|
|
case reflect.Int32:
|
|
return e.compileInt32(typ)
|
|
case reflect.Int64:
|
|
return e.compileInt64(typ)
|
|
case reflect.Uint:
|
|
return e.compileUint(typ)
|
|
case reflect.Uint8:
|
|
return e.compileUint8(typ)
|
|
case reflect.Uint16:
|
|
return e.compileUint16(typ)
|
|
case reflect.Uint32:
|
|
return e.compileUint32(typ)
|
|
case reflect.Uint64:
|
|
return e.compileUint64(typ)
|
|
case reflect.Uintptr:
|
|
return e.compileUint(typ)
|
|
case reflect.Float32:
|
|
return e.compileFloat32(typ)
|
|
case reflect.Float64:
|
|
return e.compileFloat64(typ)
|
|
case reflect.String:
|
|
return e.compileString(typ)
|
|
case reflect.Bool:
|
|
return e.compileBool(typ)
|
|
}
|
|
return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
|
|
}
|
|
|
|
func (e *Encoder) optimizeStructFieldPtrHead(typ *rtype, code *opcode) *opcode {
|
|
ptrHeadOp := code.op.headToPtrHead()
|
|
if code.op != ptrHeadOp {
|
|
code.op = ptrHeadOp
|
|
return code
|
|
}
|
|
return newOpCode(opPtr, typ, e.indent, code)
|
|
}
|
|
|
|
func (e *Encoder) compilePtr(typ *rtype, root, withIndent bool) (*opcode, error) {
|
|
code, err := e.compile(typ.Elem(), root, withIndent)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return e.optimizeStructFieldPtrHead(typ, code), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInt(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opInt, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInt8(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opInt8, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInt16(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opInt16, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInt32(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opInt32, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInt64(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opInt64, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileUint(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opUint, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileUint8(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opUint8, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileUint16(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opUint16, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileUint32(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opUint32, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileUint64(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opUint64, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileFloat32(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opFloat32, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileFloat64(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opFloat64, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileString(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opString, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileBool(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opBool, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileBytes(typ *rtype) (*opcode, error) {
|
|
return newOpCode(opBytes, typ, e.indent, newEndOp(e.indent)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileInterface(typ *rtype, root bool) (*opcode, error) {
|
|
return (*opcode)(unsafe.Pointer(&interfaceCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opInterface,
|
|
typ: typ,
|
|
indent: e.indent,
|
|
next: newEndOp(e.indent),
|
|
},
|
|
root: root,
|
|
})), nil
|
|
}
|
|
|
|
func (e *Encoder) compileSlice(typ *rtype, root, withIndent bool) (*opcode, error) {
|
|
elem := typ.Elem()
|
|
size := elem.Size()
|
|
|
|
e.indent++
|
|
code, err := e.compile(elem, false, withIndent)
|
|
e.indent--
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// header => opcode => elem => end
|
|
// ^ |
|
|
// |________|
|
|
|
|
header := newSliceHeaderCode(e.indent)
|
|
elemCode := &sliceElemCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opSliceElem,
|
|
indent: e.indent,
|
|
},
|
|
size: size,
|
|
}
|
|
end := newOpCode(opSliceEnd, nil, e.indent, newEndOp(e.indent))
|
|
if withIndent {
|
|
if root {
|
|
header.op = opRootSliceHeadIndent
|
|
elemCode.op = opRootSliceElemIndent
|
|
} else {
|
|
header.op = opSliceHeadIndent
|
|
elemCode.op = opSliceElemIndent
|
|
}
|
|
end.op = opSliceEndIndent
|
|
}
|
|
|
|
header.elem = elemCode
|
|
header.end = end
|
|
header.next = code
|
|
code.beforeLastCode().next = (*opcode)(unsafe.Pointer(elemCode))
|
|
elemCode.next = code
|
|
elemCode.end = end
|
|
return (*opcode)(unsafe.Pointer(header)), nil
|
|
}
|
|
|
|
func (e *Encoder) compileArray(typ *rtype, root, withIndent bool) (*opcode, error) {
|
|
elem := typ.Elem()
|
|
alen := typ.Len()
|
|
size := elem.Size()
|
|
|
|
e.indent++
|
|
code, err := e.compile(elem, false, withIndent)
|
|
e.indent--
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// header => opcode => elem => end
|
|
// ^ |
|
|
// |________|
|
|
|
|
header := newArrayHeaderCode(e.indent, alen)
|
|
elemCode := &arrayElemCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opArrayElem,
|
|
},
|
|
len: uintptr(alen),
|
|
size: size,
|
|
}
|
|
end := newOpCode(opArrayEnd, nil, e.indent, newEndOp(e.indent))
|
|
|
|
if withIndent {
|
|
header.op = opArrayHeadIndent
|
|
elemCode.op = opArrayElemIndent
|
|
end.op = opArrayEndIndent
|
|
}
|
|
|
|
header.elem = elemCode
|
|
header.end = end
|
|
header.next = code
|
|
code.beforeLastCode().next = (*opcode)(unsafe.Pointer(elemCode))
|
|
elemCode.next = code
|
|
elemCode.end = end
|
|
return (*opcode)(unsafe.Pointer(header)), nil
|
|
}
|
|
|
|
//go:linkname mapiterinit reflect.mapiterinit
|
|
//go:noescape
|
|
func mapiterinit(mapType *rtype, m unsafe.Pointer) unsafe.Pointer
|
|
|
|
//go:linkname mapiterkey reflect.mapiterkey
|
|
//go:noescape
|
|
func mapiterkey(it unsafe.Pointer) unsafe.Pointer
|
|
|
|
//go:linkname mapiternext reflect.mapiternext
|
|
//go:noescape
|
|
func mapiternext(it unsafe.Pointer)
|
|
|
|
//go:linkname maplen reflect.maplen
|
|
//go:noescape
|
|
func maplen(m unsafe.Pointer) int
|
|
|
|
func (e *Encoder) compileMap(typ *rtype, withLoad, root, withIndent bool) (*opcode, error) {
|
|
// header => code => value => code => key => code => value => code => end
|
|
// ^ |
|
|
// |_______________________|
|
|
e.indent++
|
|
keyType := typ.Key()
|
|
keyCode, err := e.compileKey(keyType, false, withIndent)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
valueType := typ.Elem()
|
|
valueCode, err := e.compile(valueType, false, withIndent)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
key := newMapKeyCode(e.indent)
|
|
value := newMapValueCode(e.indent)
|
|
|
|
e.indent--
|
|
|
|
header := newMapHeaderCode(typ, withLoad, e.indent)
|
|
header.key = key
|
|
header.value = value
|
|
end := newOpCode(opMapEnd, nil, e.indent, newEndOp(e.indent))
|
|
|
|
if withIndent {
|
|
if header.op == opMapHead {
|
|
if root {
|
|
header.op = opRootMapHeadIndent
|
|
} else {
|
|
header.op = opMapHeadIndent
|
|
}
|
|
} else {
|
|
header.op = opMapHeadLoadIndent
|
|
}
|
|
if root {
|
|
key.op = opRootMapKeyIndent
|
|
} else {
|
|
key.op = opMapKeyIndent
|
|
}
|
|
value.op = opMapValueIndent
|
|
end.op = opMapEndIndent
|
|
}
|
|
|
|
header.next = keyCode
|
|
keyCode.beforeLastCode().next = (*opcode)(unsafe.Pointer(value))
|
|
value.next = valueCode
|
|
valueCode.beforeLastCode().next = (*opcode)(unsafe.Pointer(key))
|
|
key.next = keyCode
|
|
|
|
header.end = end
|
|
key.end = end
|
|
|
|
return (*opcode)(unsafe.Pointer(header)), nil
|
|
}
|
|
|
|
func (e *Encoder) typeToHeaderType(op opType) opType {
|
|
switch op {
|
|
case opInt:
|
|
return opStructFieldHeadInt
|
|
case opInt8:
|
|
return opStructFieldHeadInt8
|
|
case opInt16:
|
|
return opStructFieldHeadInt16
|
|
case opInt32:
|
|
return opStructFieldHeadInt32
|
|
case opInt64:
|
|
return opStructFieldHeadInt64
|
|
case opUint:
|
|
return opStructFieldHeadUint
|
|
case opUint8:
|
|
return opStructFieldHeadUint8
|
|
case opUint16:
|
|
return opStructFieldHeadUint16
|
|
case opUint32:
|
|
return opStructFieldHeadUint32
|
|
case opUint64:
|
|
return opStructFieldHeadUint64
|
|
case opFloat32:
|
|
return opStructFieldHeadFloat32
|
|
case opFloat64:
|
|
return opStructFieldHeadFloat64
|
|
case opString:
|
|
return opStructFieldHeadString
|
|
case opBool:
|
|
return opStructFieldHeadBool
|
|
case opMapHead:
|
|
return opStructFieldHeadMap
|
|
case opMapHeadLoad:
|
|
return opStructFieldHeadMapLoad
|
|
case opMapHeadIndent:
|
|
return opStructFieldHeadMapIndent
|
|
case opMapHeadLoadIndent:
|
|
return opStructFieldHeadMapLoadIndent
|
|
case opArrayHead:
|
|
return opStructFieldHeadArray
|
|
case opArrayHeadIndent:
|
|
return opStructFieldHeadArrayIndent
|
|
case opSliceHead:
|
|
return opStructFieldHeadSlice
|
|
case opSliceHeadIndent:
|
|
return opStructFieldHeadSliceIndent
|
|
case opStructFieldHead:
|
|
return opStructFieldHeadStruct
|
|
case opStructFieldHeadIndent:
|
|
return opStructFieldHeadStructIndent
|
|
case opMarshalJSON:
|
|
return opStructFieldHeadMarshalJSON
|
|
case opMarshalText:
|
|
return opStructFieldHeadMarshalText
|
|
}
|
|
return opStructFieldHead
|
|
}
|
|
|
|
func (e *Encoder) typeToFieldType(op opType) opType {
|
|
switch op {
|
|
case opInt:
|
|
return opStructFieldInt
|
|
case opInt8:
|
|
return opStructFieldInt8
|
|
case opInt16:
|
|
return opStructFieldInt16
|
|
case opInt32:
|
|
return opStructFieldInt32
|
|
case opInt64:
|
|
return opStructFieldInt64
|
|
case opUint:
|
|
return opStructFieldUint
|
|
case opUint8:
|
|
return opStructFieldUint8
|
|
case opUint16:
|
|
return opStructFieldUint16
|
|
case opUint32:
|
|
return opStructFieldUint32
|
|
case opUint64:
|
|
return opStructFieldUint64
|
|
case opFloat32:
|
|
return opStructFieldFloat32
|
|
case opFloat64:
|
|
return opStructFieldFloat64
|
|
case opString:
|
|
return opStructFieldString
|
|
case opBool:
|
|
return opStructFieldBool
|
|
case opMapHead:
|
|
return opStructFieldMap
|
|
case opMapHeadLoad:
|
|
return opStructFieldMapLoad
|
|
case opMapHeadIndent:
|
|
return opStructFieldMapIndent
|
|
case opMapHeadLoadIndent:
|
|
return opStructFieldMapLoadIndent
|
|
case opArrayHead:
|
|
return opStructFieldArray
|
|
case opArrayHeadIndent:
|
|
return opStructFieldArrayIndent
|
|
case opSliceHead:
|
|
return opStructFieldSlice
|
|
case opSliceHeadIndent:
|
|
return opStructFieldSliceIndent
|
|
case opStructFieldHead:
|
|
return opStructFieldStruct
|
|
case opStructFieldHeadIndent:
|
|
return opStructFieldStructIndent
|
|
case opMarshalJSON:
|
|
return opStructFieldMarshalJSON
|
|
case opMarshalText:
|
|
return opStructFieldMarshalText
|
|
}
|
|
return opStructField
|
|
}
|
|
|
|
func (e *Encoder) optimizeStructHeader(op opType, tag *structTag, withIndent bool) opType {
|
|
headType := e.typeToHeaderType(op)
|
|
switch {
|
|
case tag.isOmitEmpty:
|
|
headType = headType.headToOmitEmptyHead()
|
|
case tag.isString:
|
|
headType = headType.headToStringTagHead()
|
|
}
|
|
if withIndent {
|
|
return headType.toIndent()
|
|
}
|
|
return headType
|
|
}
|
|
|
|
func (e *Encoder) optimizeStructField(op opType, tag *structTag, withIndent bool) opType {
|
|
fieldType := e.typeToFieldType(op)
|
|
switch {
|
|
case tag.isOmitEmpty:
|
|
fieldType = fieldType.fieldToOmitEmptyField()
|
|
case tag.isString:
|
|
fieldType = fieldType.fieldToStringTagField()
|
|
}
|
|
if withIndent {
|
|
return fieldType.toIndent()
|
|
}
|
|
return fieldType
|
|
}
|
|
|
|
func (e *Encoder) recursiveCode(typ *rtype, code *compiledCode) *opcode {
|
|
return (*opcode)(unsafe.Pointer(&recursiveCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructFieldRecursive,
|
|
typ: typ,
|
|
indent: e.indent,
|
|
next: newEndOp(e.indent),
|
|
},
|
|
jmp: code,
|
|
}))
|
|
}
|
|
|
|
func (e *Encoder) compiledCode(typ *rtype, withIndent bool) *opcode {
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
if withIndent {
|
|
if compiledCode, exists := e.structTypeToCompiledIndentCode[typeptr]; exists {
|
|
return e.recursiveCode(typ, compiledCode)
|
|
}
|
|
} else {
|
|
if compiledCode, exists := e.structTypeToCompiledCode[typeptr]; exists {
|
|
return e.recursiveCode(typ, compiledCode)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (e *Encoder) structHeader(fieldCode *structFieldCode, valueCode *opcode, tag *structTag, withIndent bool) *opcode {
|
|
fieldCode.indent--
|
|
op := e.optimizeStructHeader(valueCode.op, tag, withIndent)
|
|
fieldCode.op = op
|
|
switch op {
|
|
case opStructFieldHead,
|
|
opStructFieldHeadSlice,
|
|
opStructFieldHeadArray,
|
|
opStructFieldHeadMap,
|
|
opStructFieldHeadMapLoad,
|
|
opStructFieldHeadStruct,
|
|
opStructFieldHeadOmitEmpty,
|
|
opStructFieldHeadOmitEmptySlice,
|
|
opStructFieldHeadOmitEmptyArray,
|
|
opStructFieldHeadOmitEmptyMap,
|
|
opStructFieldHeadOmitEmptyMapLoad,
|
|
opStructFieldHeadOmitEmptyStruct,
|
|
opStructFieldHeadStringTag,
|
|
opStructFieldHeadIndent,
|
|
opStructFieldHeadSliceIndent,
|
|
opStructFieldHeadArrayIndent,
|
|
opStructFieldHeadMapIndent,
|
|
opStructFieldHeadMapLoadIndent,
|
|
opStructFieldHeadStructIndent,
|
|
opStructFieldHeadOmitEmptyIndent,
|
|
opStructFieldHeadOmitEmptySliceIndent,
|
|
opStructFieldHeadOmitEmptyArrayIndent,
|
|
opStructFieldHeadOmitEmptyMapIndent,
|
|
opStructFieldHeadOmitEmptyMapLoadIndent,
|
|
opStructFieldHeadOmitEmptyStructIndent,
|
|
opStructFieldHeadStringTagIndent:
|
|
return valueCode.beforeLastCode()
|
|
}
|
|
return (*opcode)(unsafe.Pointer(fieldCode))
|
|
}
|
|
|
|
func (e *Encoder) structField(fieldCode *structFieldCode, valueCode *opcode, tag *structTag, withIndent bool) *opcode {
|
|
code := (*opcode)(unsafe.Pointer(fieldCode))
|
|
op := e.optimizeStructField(valueCode.op, tag, withIndent)
|
|
fieldCode.op = op
|
|
switch op {
|
|
case opStructField,
|
|
opStructFieldSlice,
|
|
opStructFieldArray,
|
|
opStructFieldMap,
|
|
opStructFieldMapLoad,
|
|
opStructFieldStruct,
|
|
opStructFieldOmitEmpty,
|
|
opStructFieldOmitEmptySlice,
|
|
opStructFieldOmitEmptyArray,
|
|
opStructFieldOmitEmptyMap,
|
|
opStructFieldOmitEmptyMapLoad,
|
|
opStructFieldOmitEmptyStruct,
|
|
opStructFieldStringTag,
|
|
opStructFieldIndent,
|
|
opStructFieldSliceIndent,
|
|
opStructFieldArrayIndent,
|
|
opStructFieldMapIndent,
|
|
opStructFieldMapLoadIndent,
|
|
opStructFieldStructIndent,
|
|
opStructFieldOmitEmptyIndent,
|
|
opStructFieldOmitEmptySliceIndent,
|
|
opStructFieldOmitEmptyArrayIndent,
|
|
opStructFieldOmitEmptyMapIndent,
|
|
opStructFieldOmitEmptyMapLoadIndent,
|
|
opStructFieldOmitEmptyStructIndent,
|
|
opStructFieldStringTagIndent:
|
|
return valueCode.beforeLastCode()
|
|
}
|
|
return code
|
|
}
|
|
|
|
func (e *Encoder) isNotExistsField(head *structFieldCode) bool {
|
|
if head == nil {
|
|
return false
|
|
}
|
|
if head.op != opStructFieldAnonymousHead {
|
|
return false
|
|
}
|
|
if head.next == nil {
|
|
return false
|
|
}
|
|
if head.nextField == nil {
|
|
return false
|
|
}
|
|
if head.nextField.op != opStructAnonymousEnd {
|
|
return false
|
|
}
|
|
if head.next.op == opStructAnonymousEnd {
|
|
return true
|
|
}
|
|
if head.next.op.codeType() != codeStructField {
|
|
return false
|
|
}
|
|
return e.isNotExistsField(head.next.toStructFieldCode())
|
|
}
|
|
|
|
func (e *Encoder) optimizeAnonymousFields(head *structFieldCode) {
|
|
code := head
|
|
var prev *structFieldCode
|
|
for {
|
|
if code.op == opStructEnd || code.op == opStructEndIndent {
|
|
break
|
|
}
|
|
if code.op == opStructField || code.op == opStructFieldIndent {
|
|
codeType := code.next.op.codeType()
|
|
if codeType == codeStructField {
|
|
if e.isNotExistsField(code.next.toStructFieldCode()) {
|
|
code.next = code.nextField
|
|
linkPrevToNextField(prev, code)
|
|
code = prev
|
|
}
|
|
}
|
|
}
|
|
prev = code
|
|
code = code.nextField.toStructFieldCode()
|
|
}
|
|
}
|
|
|
|
type structFieldPair struct {
|
|
prevField *structFieldCode
|
|
curField *structFieldCode
|
|
isTaggedKey bool
|
|
linked bool
|
|
}
|
|
|
|
func (e *Encoder) anonymousStructFieldPairMap(typ *rtype, tags structTags, valueCode *structFieldCode) map[string][]structFieldPair {
|
|
anonymousFields := map[string][]structFieldPair{}
|
|
f := valueCode
|
|
var prevAnonymousField *structFieldCode
|
|
for {
|
|
existsKey := tags.existsKey(f.displayKey)
|
|
op := f.op.headToAnonymousHead()
|
|
if op != f.op {
|
|
if existsKey {
|
|
f.op = opStructFieldAnonymousHead
|
|
} else {
|
|
f.op = op
|
|
}
|
|
} else if f.op == opStructEnd {
|
|
f.op = opStructAnonymousEnd
|
|
} else if existsKey {
|
|
linkPrevToNextField(prevAnonymousField, f)
|
|
}
|
|
|
|
if f.displayKey == "" {
|
|
if f.nextField == nil {
|
|
break
|
|
}
|
|
prevAnonymousField = f
|
|
f = f.nextField.toStructFieldCode()
|
|
continue
|
|
}
|
|
|
|
anonymousFields[f.displayKey] = append(anonymousFields[f.displayKey], structFieldPair{
|
|
prevField: prevAnonymousField,
|
|
curField: f,
|
|
isTaggedKey: f.isTaggedKey,
|
|
})
|
|
if f.next != nil && f.nextField != f.next && f.next.op.codeType() == codeStructField {
|
|
for k, v := range e.anonymousStructFieldPairMap(typ, tags, f.next.toStructFieldCode()) {
|
|
anonymousFields[k] = append(anonymousFields[k], v...)
|
|
}
|
|
}
|
|
if f.nextField == nil {
|
|
break
|
|
}
|
|
prevAnonymousField = f
|
|
f = f.nextField.toStructFieldCode()
|
|
}
|
|
return anonymousFields
|
|
}
|
|
|
|
func (e *Encoder) optimizeConflictAnonymousFields(anonymousFields map[string][]structFieldPair) {
|
|
for _, fieldPairs := range anonymousFields {
|
|
if len(fieldPairs) == 1 {
|
|
continue
|
|
}
|
|
// conflict anonymous fields
|
|
taggedPairs := []structFieldPair{}
|
|
for _, fieldPair := range fieldPairs {
|
|
if fieldPair.isTaggedKey {
|
|
taggedPairs = append(taggedPairs, fieldPair)
|
|
} else {
|
|
if !fieldPair.linked {
|
|
if fieldPair.prevField == nil {
|
|
// head operation
|
|
fieldPair.curField.op = opStructFieldAnonymousHead
|
|
} else {
|
|
linkPrevToNextField(fieldPair.prevField, fieldPair.curField)
|
|
}
|
|
fieldPair.linked = true
|
|
}
|
|
}
|
|
}
|
|
if len(taggedPairs) > 1 {
|
|
for _, fieldPair := range taggedPairs {
|
|
if !fieldPair.linked {
|
|
if fieldPair.prevField == nil {
|
|
// head operation
|
|
fieldPair.curField.op = opStructFieldAnonymousHead
|
|
} else {
|
|
linkPrevToNextField(fieldPair.prevField, fieldPair.curField)
|
|
}
|
|
fieldPair.linked = true
|
|
}
|
|
}
|
|
} else {
|
|
for _, fieldPair := range taggedPairs {
|
|
fieldPair.curField.isTaggedKey = false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (e *Encoder) compileStruct(typ *rtype, isPtr, root, withIndent bool) (*opcode, error) {
|
|
if code := e.compiledCode(typ, withIndent); code != nil {
|
|
return code, nil
|
|
}
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
compiled := &compiledCode{}
|
|
if withIndent {
|
|
e.structTypeToCompiledIndentCode[typeptr] = compiled
|
|
} else {
|
|
e.structTypeToCompiledCode[typeptr] = compiled
|
|
}
|
|
// header => code => structField => code => end
|
|
// ^ |
|
|
// |__________|
|
|
fieldNum := typ.NumField()
|
|
fieldIdx := 0
|
|
var (
|
|
head *structFieldCode
|
|
code *opcode
|
|
prevField *structFieldCode
|
|
)
|
|
e.indent++
|
|
tags := structTags{}
|
|
anonymousFields := map[string][]structFieldPair{}
|
|
for i := 0; i < fieldNum; i++ {
|
|
field := typ.Field(i)
|
|
if isIgnoredStructField(field) {
|
|
continue
|
|
}
|
|
tags = append(tags, structTagFromField(field))
|
|
}
|
|
for i, tag := range tags {
|
|
field := tag.field
|
|
fieldType := type2rtype(field.Type)
|
|
if isPtr && i == 0 {
|
|
// head field of pointer structure at top level
|
|
// if field type is pointer and implements MarshalJSON or MarshalText,
|
|
// it need to operation of dereference of pointer.
|
|
if field.Type.Kind() == reflect.Ptr &&
|
|
(field.Type.Implements(marshalJSONType) || field.Type.Implements(marshalTextType)) {
|
|
fieldType = rtype_ptrTo(fieldType)
|
|
}
|
|
}
|
|
valueCode, err := e.compile(fieldType, false, withIndent)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if field.Anonymous {
|
|
for k, v := range e.anonymousStructFieldPairMap(typ, tags, valueCode.toStructFieldCode()) {
|
|
anonymousFields[k] = append(anonymousFields[k], v...)
|
|
}
|
|
}
|
|
if fieldNum == 1 && valueCode.op == opPtr {
|
|
// if field number is one and primitive pointer type,
|
|
// it should encode as **not** pointer .
|
|
switch valueCode.next.op {
|
|
case opInt, opInt8, opInt16, opInt32, opInt64,
|
|
opUint, opUint8, opUint16, opUint32, opUint64,
|
|
opFloat32, opFloat64, opBool, opString, opBytes:
|
|
valueCode = valueCode.next
|
|
}
|
|
}
|
|
key := fmt.Sprintf(`"%s":`, tag.key)
|
|
fieldCode := &structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
typ: valueCode.typ,
|
|
next: valueCode,
|
|
indent: e.indent,
|
|
},
|
|
anonymousKey: field.Anonymous,
|
|
key: []byte(key),
|
|
isTaggedKey: tag.isTaggedKey,
|
|
displayKey: tag.key,
|
|
offset: field.Offset,
|
|
}
|
|
if fieldIdx == 0 {
|
|
code = e.structHeader(fieldCode, valueCode, tag, withIndent)
|
|
head = fieldCode
|
|
prevField = fieldCode
|
|
} else {
|
|
fcode := (*opcode)(unsafe.Pointer(fieldCode))
|
|
code.next = fcode
|
|
code = e.structField(fieldCode, valueCode, tag, withIndent)
|
|
prevField.nextField = fcode
|
|
prevField = fieldCode
|
|
}
|
|
fieldIdx++
|
|
}
|
|
e.indent--
|
|
|
|
structEndCode := (*opcode)(unsafe.Pointer(&structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructEnd,
|
|
typ: nil,
|
|
indent: e.indent,
|
|
},
|
|
}))
|
|
structEndCode.next = newEndOp(e.indent)
|
|
if withIndent {
|
|
structEndCode.op = opStructEndIndent
|
|
}
|
|
|
|
if prevField != nil && prevField.nextField == nil {
|
|
prevField.nextField = structEndCode
|
|
}
|
|
|
|
// no struct field
|
|
if head == nil {
|
|
head = &structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructFieldHead,
|
|
typ: typ,
|
|
indent: e.indent,
|
|
},
|
|
nextField: structEndCode,
|
|
}
|
|
if withIndent {
|
|
head.op = opStructFieldHeadIndent
|
|
}
|
|
code = (*opcode)(unsafe.Pointer(head))
|
|
}
|
|
head.end = structEndCode
|
|
code.next = structEndCode
|
|
|
|
e.optimizeConflictAnonymousFields(anonymousFields)
|
|
e.optimizeAnonymousFields(head)
|
|
|
|
ret := (*opcode)(unsafe.Pointer(head))
|
|
compiled.code = ret
|
|
|
|
if withIndent {
|
|
delete(e.structTypeToCompiledIndentCode, typeptr)
|
|
} else {
|
|
delete(e.structTypeToCompiledCode, typeptr)
|
|
}
|
|
|
|
return ret, nil
|
|
}
|