/
compiler.go
1569 lines (1436 loc) · 37 KB
/
compiler.go
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package encoder
import (
"context"
"encoding"
"encoding/json"
"fmt"
"reflect"
"strings"
"sync/atomic"
"unsafe"
"github.com/goccy/go-json/internal/errors"
"github.com/goccy/go-json/internal/runtime"
)
type marshalerContext interface {
MarshalJSON(context.Context) ([]byte, error)
}
var (
marshalJSONType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
marshalJSONContextType = reflect.TypeOf((*marshalerContext)(nil)).Elem()
marshalTextType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
jsonNumberType = reflect.TypeOf(json.Number(""))
cachedOpcodeSets []*OpcodeSet
cachedOpcodeMap unsafe.Pointer // map[uintptr]*OpcodeSet
typeAddr *runtime.TypeAddr
)
func init() {
typeAddr = runtime.AnalyzeTypeAddr()
if typeAddr == nil {
typeAddr = &runtime.TypeAddr{}
}
cachedOpcodeSets = make([]*OpcodeSet, typeAddr.AddrRange>>typeAddr.AddrShift)
}
func loadOpcodeMap() map[uintptr]*OpcodeSet {
p := atomic.LoadPointer(&cachedOpcodeMap)
return *(*map[uintptr]*OpcodeSet)(unsafe.Pointer(&p))
}
func storeOpcodeSet(typ uintptr, set *OpcodeSet, m map[uintptr]*OpcodeSet) {
newOpcodeMap := make(map[uintptr]*OpcodeSet, len(m)+1)
newOpcodeMap[typ] = set
for k, v := range m {
newOpcodeMap[k] = v
}
atomic.StorePointer(&cachedOpcodeMap, *(*unsafe.Pointer)(unsafe.Pointer(&newOpcodeMap)))
}
func compileToGetCodeSetSlowPath(typeptr uintptr) (*OpcodeSet, error) {
opcodeMap := loadOpcodeMap()
if codeSet, exists := opcodeMap[typeptr]; exists {
return codeSet, nil
}
// noescape trick for header.typ ( reflect.*rtype )
copiedType := *(**runtime.Type)(unsafe.Pointer(&typeptr))
noescapeKeyCode, err := compileHead(&compileContext{
typ: copiedType,
structTypeToCompiledCode: map[uintptr]*CompiledCode{},
})
if err != nil {
return nil, err
}
escapeKeyCode, err := compileHead(&compileContext{
typ: copiedType,
structTypeToCompiledCode: map[uintptr]*CompiledCode{},
escapeKey: true,
})
if err != nil {
return nil, err
}
noescapeKeyCode = copyOpcode(noescapeKeyCode)
escapeKeyCode = copyOpcode(escapeKeyCode)
setTotalLengthToInterfaceOp(noescapeKeyCode)
setTotalLengthToInterfaceOp(escapeKeyCode)
interfaceNoescapeKeyCode := copyToInterfaceOpcode(noescapeKeyCode)
interfaceEscapeKeyCode := copyToInterfaceOpcode(escapeKeyCode)
codeLength := noescapeKeyCode.TotalLength()
codeSet := &OpcodeSet{
Type: copiedType,
NoescapeKeyCode: noescapeKeyCode,
EscapeKeyCode: escapeKeyCode,
InterfaceNoescapeKeyCode: interfaceNoescapeKeyCode,
InterfaceEscapeKeyCode: interfaceEscapeKeyCode,
CodeLength: codeLength,
EndCode: ToEndCode(interfaceNoescapeKeyCode),
}
storeOpcodeSet(typeptr, codeSet, opcodeMap)
return codeSet, nil
}
func compileHead(ctx *compileContext) (*Opcode, error) {
typ := ctx.typ
switch {
case implementsMarshalJSON(typ):
return compileMarshalJSON(ctx)
case implementsMarshalText(typ):
return compileMarshalText(ctx)
}
isPtr := false
orgType := typ
if typ.Kind() == reflect.Ptr {
typ = typ.Elem()
isPtr = true
}
switch {
case implementsMarshalJSON(typ):
return compileMarshalJSON(ctx)
case implementsMarshalText(typ):
return compileMarshalText(ctx)
}
switch typ.Kind() {
case reflect.Slice:
ctx := ctx.withType(typ)
elem := typ.Elem()
if elem.Kind() == reflect.Uint8 {
p := runtime.PtrTo(elem)
if !implementsMarshalJSONType(p) && !p.Implements(marshalTextType) {
if isPtr {
return compileBytesPtr(ctx)
}
return compileBytes(ctx)
}
}
code, err := compileSlice(ctx)
if err != nil {
return nil, err
}
optimizeStructEnd(code)
linkRecursiveCode(code)
return code, nil
case reflect.Map:
if isPtr {
return compilePtr(ctx.withType(runtime.PtrTo(typ)))
}
code, err := compileMap(ctx.withType(typ))
if err != nil {
return nil, err
}
optimizeStructEnd(code)
linkRecursiveCode(code)
return code, nil
case reflect.Struct:
code, err := compileStruct(ctx.withType(typ), isPtr)
if err != nil {
return nil, err
}
optimizeStructEnd(code)
linkRecursiveCode(code)
return code, nil
case reflect.Int:
ctx := ctx.withType(typ)
if isPtr {
return compileIntPtr(ctx)
}
return compileInt(ctx)
case reflect.Int8:
ctx := ctx.withType(typ)
if isPtr {
return compileInt8Ptr(ctx)
}
return compileInt8(ctx)
case reflect.Int16:
ctx := ctx.withType(typ)
if isPtr {
return compileInt16Ptr(ctx)
}
return compileInt16(ctx)
case reflect.Int32:
ctx := ctx.withType(typ)
if isPtr {
return compileInt32Ptr(ctx)
}
return compileInt32(ctx)
case reflect.Int64:
ctx := ctx.withType(typ)
if isPtr {
return compileInt64Ptr(ctx)
}
return compileInt64(ctx)
case reflect.Uint, reflect.Uintptr:
ctx := ctx.withType(typ)
if isPtr {
return compileUintPtr(ctx)
}
return compileUint(ctx)
case reflect.Uint8:
ctx := ctx.withType(typ)
if isPtr {
return compileUint8Ptr(ctx)
}
return compileUint8(ctx)
case reflect.Uint16:
ctx := ctx.withType(typ)
if isPtr {
return compileUint16Ptr(ctx)
}
return compileUint16(ctx)
case reflect.Uint32:
ctx := ctx.withType(typ)
if isPtr {
return compileUint32Ptr(ctx)
}
return compileUint32(ctx)
case reflect.Uint64:
ctx := ctx.withType(typ)
if isPtr {
return compileUint64Ptr(ctx)
}
return compileUint64(ctx)
case reflect.Float32:
ctx := ctx.withType(typ)
if isPtr {
return compileFloat32Ptr(ctx)
}
return compileFloat32(ctx)
case reflect.Float64:
ctx := ctx.withType(typ)
if isPtr {
return compileFloat64Ptr(ctx)
}
return compileFloat64(ctx)
case reflect.String:
ctx := ctx.withType(typ)
if isPtr {
return compileStringPtr(ctx)
}
return compileString(ctx)
case reflect.Bool:
ctx := ctx.withType(typ)
if isPtr {
return compileBoolPtr(ctx)
}
return compileBool(ctx)
case reflect.Interface:
ctx := ctx.withType(typ)
if isPtr {
return compileInterfacePtr(ctx)
}
return compileInterface(ctx)
default:
if isPtr && typ.Implements(marshalTextType) {
typ = orgType
}
code, err := compile(ctx.withType(typ), isPtr)
if err != nil {
return nil, err
}
optimizeStructEnd(code)
linkRecursiveCode(code)
return code, nil
}
}
func linkRecursiveCode(c *Opcode) {
for code := c; code.Op != OpEnd && code.Op != OpRecursiveEnd; {
switch code.Op {
case OpRecursive, OpRecursivePtr:
if code.Jmp.Linked {
code = code.Next
continue
}
code.Jmp.Code = copyOpcode(code.Jmp.Code)
c := code.Jmp.Code
c.End.Next = newEndOp(&compileContext{})
c.Op = c.Op.PtrHeadToHead()
beforeLastCode := c.End
lastCode := beforeLastCode.Next
lastCode.Idx = beforeLastCode.Idx + uintptrSize
lastCode.ElemIdx = lastCode.Idx + uintptrSize
lastCode.Length = lastCode.Idx + 2*uintptrSize
// extend length to alloc slot for elemIdx + length
totalLength := uintptr(code.TotalLength() + 3)
nextTotalLength := uintptr(c.TotalLength() + 3)
c.End.Next.Op = OpRecursiveEnd
code.Jmp.CurLen = totalLength
code.Jmp.NextLen = nextTotalLength
code.Jmp.Linked = true
linkRecursiveCode(code.Jmp.Code)
code = code.Next
continue
}
switch code.Op.CodeType() {
case CodeArrayElem, CodeSliceElem, CodeMapKey:
code = code.End
default:
code = code.Next
}
}
}
func optimizeStructEnd(c *Opcode) {
for code := c; code.Op != OpEnd; {
if code.Op == OpRecursive || code.Op == OpRecursivePtr {
// ignore if exists recursive operation
return
}
switch code.Op.CodeType() {
case CodeArrayElem, CodeSliceElem, CodeMapKey:
code = code.End
default:
code = code.Next
}
}
for code := c; code.Op != OpEnd; {
switch code.Op.CodeType() {
case CodeArrayElem, CodeSliceElem, CodeMapKey:
code = code.End
case CodeStructEnd:
switch code.Op {
case OpStructEnd:
prev := code.PrevField
prevOp := prev.Op.String()
if strings.Contains(prevOp, "Head") ||
strings.Contains(prevOp, "Slice") ||
strings.Contains(prevOp, "Array") ||
strings.Contains(prevOp, "Map") ||
strings.Contains(prevOp, "MarshalJSON") ||
strings.Contains(prevOp, "MarshalText") {
// not exists field
code = code.Next
break
}
if prev.Op != prev.Op.FieldToEnd() {
prev.Op = prev.Op.FieldToEnd()
prev.Next = code.Next
}
code = code.Next
default:
code = code.Next
}
default:
code = code.Next
}
}
}
func implementsMarshalJSON(typ *runtime.Type) bool {
if !implementsMarshalJSONType(typ) {
return false
}
if typ.Kind() != reflect.Ptr {
return true
}
// type kind is reflect.Ptr
if !implementsMarshalJSONType(typ.Elem()) {
return true
}
// needs to dereference
return false
}
func implementsMarshalText(typ *runtime.Type) bool {
if !typ.Implements(marshalTextType) {
return false
}
if typ.Kind() != reflect.Ptr {
return true
}
// type kind is reflect.Ptr
if !typ.Elem().Implements(marshalTextType) {
return true
}
// needs to dereference
return false
}
func compile(ctx *compileContext, isPtr bool) (*Opcode, error) {
typ := ctx.typ
switch {
case implementsMarshalJSON(typ):
return compileMarshalJSON(ctx)
case implementsMarshalText(typ):
return compileMarshalText(ctx)
}
switch typ.Kind() {
case reflect.Ptr:
return compilePtr(ctx)
case reflect.Slice:
elem := typ.Elem()
if elem.Kind() == reflect.Uint8 {
p := runtime.PtrTo(elem)
if !implementsMarshalJSONType(p) && !p.Implements(marshalTextType) {
return compileBytes(ctx)
}
}
return compileSlice(ctx)
case reflect.Array:
return compileArray(ctx)
case reflect.Map:
return compileMap(ctx)
case reflect.Struct:
return compileStruct(ctx, isPtr)
case reflect.Interface:
return compileInterface(ctx)
case reflect.Int:
return compileInt(ctx)
case reflect.Int8:
return compileInt8(ctx)
case reflect.Int16:
return compileInt16(ctx)
case reflect.Int32:
return compileInt32(ctx)
case reflect.Int64:
return compileInt64(ctx)
case reflect.Uint:
return compileUint(ctx)
case reflect.Uint8:
return compileUint8(ctx)
case reflect.Uint16:
return compileUint16(ctx)
case reflect.Uint32:
return compileUint32(ctx)
case reflect.Uint64:
return compileUint64(ctx)
case reflect.Uintptr:
return compileUint(ctx)
case reflect.Float32:
return compileFloat32(ctx)
case reflect.Float64:
return compileFloat64(ctx)
case reflect.String:
return compileString(ctx)
case reflect.Bool:
return compileBool(ctx)
}
return nil, &errors.UnsupportedTypeError{Type: runtime.RType2Type(typ)}
}
func convertPtrOp(code *Opcode) OpType {
ptrHeadOp := code.Op.HeadToPtrHead()
if code.Op != ptrHeadOp {
if code.PtrNum > 0 {
// ptr field and ptr head
code.PtrNum--
}
return ptrHeadOp
}
switch code.Op {
case OpInt:
return OpIntPtr
case OpUint:
return OpUintPtr
case OpFloat32:
return OpFloat32Ptr
case OpFloat64:
return OpFloat64Ptr
case OpString:
return OpStringPtr
case OpBool:
return OpBoolPtr
case OpBytes:
return OpBytesPtr
case OpNumber:
return OpNumberPtr
case OpArray:
return OpArrayPtr
case OpSlice:
return OpSlicePtr
case OpMap:
return OpMapPtr
case OpMarshalJSON:
return OpMarshalJSONPtr
case OpMarshalText:
return OpMarshalTextPtr
case OpInterface:
return OpInterfacePtr
case OpRecursive:
return OpRecursivePtr
}
return code.Op
}
func compileKey(ctx *compileContext) (*Opcode, error) {
typ := ctx.typ
switch {
case implementsMarshalJSON(typ):
return compileMarshalJSON(ctx)
case implementsMarshalText(typ):
return compileMarshalText(ctx)
}
switch typ.Kind() {
case reflect.Ptr:
return compilePtr(ctx)
case reflect.String:
return compileString(ctx)
case reflect.Int:
return compileIntString(ctx)
case reflect.Int8:
return compileInt8String(ctx)
case reflect.Int16:
return compileInt16String(ctx)
case reflect.Int32:
return compileInt32String(ctx)
case reflect.Int64:
return compileInt64String(ctx)
case reflect.Uint:
return compileUintString(ctx)
case reflect.Uint8:
return compileUint8String(ctx)
case reflect.Uint16:
return compileUint16String(ctx)
case reflect.Uint32:
return compileUint32String(ctx)
case reflect.Uint64:
return compileUint64String(ctx)
case reflect.Uintptr:
return compileUintString(ctx)
}
return nil, &errors.UnsupportedTypeError{Type: runtime.RType2Type(typ)}
}
func compilePtr(ctx *compileContext) (*Opcode, error) {
code, err := compile(ctx.withType(ctx.typ.Elem()), true)
if err != nil {
return nil, err
}
code.Op = convertPtrOp(code)
code.PtrNum++
return code, nil
}
func compileMarshalJSON(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpMarshalJSON)
typ := ctx.typ
if isPtrMarshalJSONType(typ) {
code.Flags |= AddrForMarshalerFlags
}
if typ.Implements(marshalJSONContextType) || runtime.PtrTo(typ).Implements(marshalJSONContextType) {
code.Flags |= MarshalerContextFlags
}
if isNilableType(typ) {
code.Flags |= IsNilableTypeFlags
} else {
code.Flags &= ^IsNilableTypeFlags
}
ctx.incIndex()
return code, nil
}
func compileMarshalText(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpMarshalText)
typ := ctx.typ
if !typ.Implements(marshalTextType) && runtime.PtrTo(typ).Implements(marshalTextType) {
code.Flags |= AddrForMarshalerFlags
}
if isNilableType(typ) {
code.Flags |= IsNilableTypeFlags
} else {
code.Flags &= ^IsNilableTypeFlags
}
ctx.incIndex()
return code, nil
}
const intSize = 32 << (^uint(0) >> 63)
func compileInt(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpInt)
code.NumBitSize = intSize
ctx.incIndex()
return code, nil
}
func compileIntPtr(ctx *compileContext) (*Opcode, error) {
code, err := compileInt(ctx)
if err != nil {
return nil, err
}
code.Op = OpIntPtr
return code, nil
}
func compileInt8(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpInt)
code.NumBitSize = 8
ctx.incIndex()
return code, nil
}
func compileInt8Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileInt8(ctx)
if err != nil {
return nil, err
}
code.Op = OpIntPtr
return code, nil
}
func compileInt16(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpInt)
code.NumBitSize = 16
ctx.incIndex()
return code, nil
}
func compileInt16Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileInt16(ctx)
if err != nil {
return nil, err
}
code.Op = OpIntPtr
return code, nil
}
func compileInt32(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpInt)
code.NumBitSize = 32
ctx.incIndex()
return code, nil
}
func compileInt32Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileInt32(ctx)
if err != nil {
return nil, err
}
code.Op = OpIntPtr
return code, nil
}
func compileInt64(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpInt)
code.NumBitSize = 64
ctx.incIndex()
return code, nil
}
func compileInt64Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileInt64(ctx)
if err != nil {
return nil, err
}
code.Op = OpIntPtr
return code, nil
}
func compileUint(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUint)
code.NumBitSize = intSize
ctx.incIndex()
return code, nil
}
func compileUintPtr(ctx *compileContext) (*Opcode, error) {
code, err := compileUint(ctx)
if err != nil {
return nil, err
}
code.Op = OpUintPtr
return code, nil
}
func compileUint8(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUint)
code.NumBitSize = 8
ctx.incIndex()
return code, nil
}
func compileUint8Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileUint8(ctx)
if err != nil {
return nil, err
}
code.Op = OpUintPtr
return code, nil
}
func compileUint16(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUint)
code.NumBitSize = 16
ctx.incIndex()
return code, nil
}
func compileUint16Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileUint16(ctx)
if err != nil {
return nil, err
}
code.Op = OpUintPtr
return code, nil
}
func compileUint32(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUint)
code.NumBitSize = 32
ctx.incIndex()
return code, nil
}
func compileUint32Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileUint32(ctx)
if err != nil {
return nil, err
}
code.Op = OpUintPtr
return code, nil
}
func compileUint64(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUint)
code.NumBitSize = 64
ctx.incIndex()
return code, nil
}
func compileUint64Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileUint64(ctx)
if err != nil {
return nil, err
}
code.Op = OpUintPtr
return code, nil
}
func compileIntString(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpIntString)
code.NumBitSize = intSize
ctx.incIndex()
return code, nil
}
func compileInt8String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpIntString)
code.NumBitSize = 8
ctx.incIndex()
return code, nil
}
func compileInt16String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpIntString)
code.NumBitSize = 16
ctx.incIndex()
return code, nil
}
func compileInt32String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpIntString)
code.NumBitSize = 32
ctx.incIndex()
return code, nil
}
func compileInt64String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpIntString)
code.NumBitSize = 64
ctx.incIndex()
return code, nil
}
func compileUintString(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUintString)
code.NumBitSize = intSize
ctx.incIndex()
return code, nil
}
func compileUint8String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUintString)
code.NumBitSize = 8
ctx.incIndex()
return code, nil
}
func compileUint16String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUintString)
code.NumBitSize = 16
ctx.incIndex()
return code, nil
}
func compileUint32String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUintString)
code.NumBitSize = 32
ctx.incIndex()
return code, nil
}
func compileUint64String(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpUintString)
code.NumBitSize = 64
ctx.incIndex()
return code, nil
}
func compileFloat32(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpFloat32)
ctx.incIndex()
return code, nil
}
func compileFloat32Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileFloat32(ctx)
if err != nil {
return nil, err
}
code.Op = OpFloat32Ptr
return code, nil
}
func compileFloat64(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpFloat64)
ctx.incIndex()
return code, nil
}
func compileFloat64Ptr(ctx *compileContext) (*Opcode, error) {
code, err := compileFloat64(ctx)
if err != nil {
return nil, err
}
code.Op = OpFloat64Ptr
return code, nil
}
func compileString(ctx *compileContext) (*Opcode, error) {
var op OpType
if ctx.typ == runtime.Type2RType(jsonNumberType) {
op = OpNumber
} else {
op = OpString
}
code := newOpCode(ctx, op)
ctx.incIndex()
return code, nil
}
func compileStringPtr(ctx *compileContext) (*Opcode, error) {
code, err := compileString(ctx)
if err != nil {
return nil, err
}
if code.Op == OpNumber {
code.Op = OpNumberPtr
} else {
code.Op = OpStringPtr
}
return code, nil
}
func compileBool(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpBool)
ctx.incIndex()
return code, nil
}
func compileBoolPtr(ctx *compileContext) (*Opcode, error) {
code, err := compileBool(ctx)
if err != nil {
return nil, err
}
code.Op = OpBoolPtr
return code, nil
}
func compileBytes(ctx *compileContext) (*Opcode, error) {
code := newOpCode(ctx, OpBytes)
ctx.incIndex()
return code, nil
}
func compileBytesPtr(ctx *compileContext) (*Opcode, error) {
code, err := compileBytes(ctx)
if err != nil {
return nil, err
}
code.Op = OpBytesPtr
return code, nil
}
func compileInterface(ctx *compileContext) (*Opcode, error) {
code := newInterfaceCode(ctx)
ctx.incIndex()
return code, nil
}
func compileInterfacePtr(ctx *compileContext) (*Opcode, error) {
code, err := compileInterface(ctx)
if err != nil {
return nil, err
}
code.Op = OpInterfacePtr
return code, nil
}
func compileSlice(ctx *compileContext) (*Opcode, error) {
elem := ctx.typ.Elem()
size := elem.Size()
header := newSliceHeaderCode(ctx)
ctx.incIndex()
code, err := compileListElem(ctx.withType(elem).incIndent())
if err != nil {
return nil, err
}
code.Flags |= IndirectFlags
// header => opcode => elem => end
// ^ |
// |________|
elemCode := newSliceElemCode(ctx, header, size)
ctx.incIndex()
end := newOpCode(ctx, OpSliceEnd)
ctx.incIndex()
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 compileListElem(ctx *compileContext) (*Opcode, error) {
typ := ctx.typ
switch {
case isPtrMarshalJSONType(typ):
return compileMarshalJSON(ctx)
case !typ.Implements(marshalTextType) && runtime.PtrTo(typ).Implements(marshalTextType):
return compileMarshalText(ctx)
case typ.Kind() == reflect.Map:
return compilePtr(ctx.withType(runtime.PtrTo(typ)))
default:
code, err := compile(ctx, false)
if err != nil {
return nil, err
}
if code.Op == OpMapPtr {
code.PtrNum++
}
return code, nil
}
}
func compileArray(ctx *compileContext) (*Opcode, error) {
typ := ctx.typ
elem := typ.Elem()
alen := typ.Len()
size := elem.Size()
header := newArrayHeaderCode(ctx, alen)
ctx.incIndex()
code, err := compileListElem(ctx.withType(elem).incIndent())
if err != nil {
return nil, err
}
code.Flags |= IndirectFlags
// header => opcode => elem => end
// ^ |
// |________|
elemCode := newArrayElemCode(ctx, header, alen, size)
ctx.incIndex()
end := newOpCode(ctx, OpArrayEnd)
ctx.incIndex()
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 compileMap(ctx *compileContext) (*Opcode, error) {
// header => code => value => code => key => code => value => code => end
// ^ |
// |_______________________|
ctx = ctx.incIndent()
header := newMapHeaderCode(ctx)
ctx.incIndex()
typ := ctx.typ
keyType := ctx.typ.Key()
keyCode, err := compileKey(ctx.withType(keyType))
if err != nil {