mirror of https://github.com/goccy/go-json.git
1405 lines
35 KiB
Go
1405 lines
35 KiB
Go
package json
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import (
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"encoding"
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"fmt"
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"reflect"
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"strings"
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"sync/atomic"
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"unsafe"
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)
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type compiledCode struct {
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code *opcode
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linked bool // whether recursive code already have linked
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curLen uintptr
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nextLen uintptr
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}
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type opcodeSet struct {
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code *opcode
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codeLength int
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}
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var (
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marshalJSONType = reflect.TypeOf((*Marshaler)(nil)).Elem()
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marshalTextType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
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cachedOpcode unsafe.Pointer // map[uintptr]*opcodeSet
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baseTypeAddr uintptr
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cachedOpcodeSets []*opcodeSet
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existsCachedOpcodeSets bool
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)
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const (
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maxAcceptableTypeAddrRange = 1024 * 1024 * 2 // 2 Mib
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)
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//go:linkname typelinks reflect.typelinks
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func typelinks() ([]unsafe.Pointer, [][]int32)
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//go:linkname rtypeOff reflect.rtypeOff
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func rtypeOff(unsafe.Pointer, int32) unsafe.Pointer
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func setupOpcodeSets() error {
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sections, offsets := typelinks()
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if len(sections) != 1 {
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return fmt.Errorf("failed to get sections")
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}
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if len(offsets) != 1 {
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return fmt.Errorf("failed to get offsets")
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}
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section := sections[0]
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offset := offsets[0]
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var (
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min uintptr = uintptr(^uint(0))
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max uintptr = 0
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)
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for i := 0; i < len(offset); i++ {
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typ := (*rtype)(rtypeOff(section, offset[i]))
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addr := uintptr(unsafe.Pointer(typ))
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if min > addr {
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min = addr
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}
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if max < addr {
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max = addr
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}
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if typ.Kind() == reflect.Ptr {
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addr = uintptr(unsafe.Pointer(typ.Elem()))
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if min > addr {
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min = addr
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}
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if max < addr {
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max = addr
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}
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}
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}
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addrRange := uintptr(max) - uintptr(min)
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if addrRange == 0 {
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return fmt.Errorf("failed to get address range of types")
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}
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if addrRange > maxAcceptableTypeAddrRange {
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return fmt.Errorf("too big address range %d", addrRange)
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}
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cachedOpcodeSets = make([]*opcodeSet, addrRange)
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existsCachedOpcodeSets = true
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baseTypeAddr = min
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return nil
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}
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func init() {
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if err := setupOpcodeSets(); err != nil {
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// fallback to slow path
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}
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}
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func encodeCompileToGetCodeSetSlowPath(typeptr uintptr) (*opcodeSet, error) {
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opcodeMap := loadOpcodeMap()
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if codeSet, exists := opcodeMap[typeptr]; exists {
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return codeSet, nil
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}
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// noescape trick for header.typ ( reflect.*rtype )
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copiedType := *(**rtype)(unsafe.Pointer(&typeptr))
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code, err := encodeCompileHead(&encodeCompileContext{
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typ: copiedType,
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root: true,
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structTypeToCompiledCode: map[uintptr]*compiledCode{},
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})
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if err != nil {
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return nil, err
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}
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code = copyOpcode(code)
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codeLength := code.totalLength()
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codeSet := &opcodeSet{
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code: code,
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codeLength: codeLength,
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}
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storeOpcodeSet(typeptr, codeSet, opcodeMap)
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return codeSet, nil
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}
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func loadOpcodeMap() map[uintptr]*opcodeSet {
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p := atomic.LoadPointer(&cachedOpcode)
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return *(*map[uintptr]*opcodeSet)(unsafe.Pointer(&p))
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}
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func storeOpcodeSet(typ uintptr, set *opcodeSet, m map[uintptr]*opcodeSet) {
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newOpcodeMap := make(map[uintptr]*opcodeSet, len(m)+1)
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newOpcodeMap[typ] = set
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for k, v := range m {
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newOpcodeMap[k] = v
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}
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atomic.StorePointer(&cachedOpcode, *(*unsafe.Pointer)(unsafe.Pointer(&newOpcodeMap)))
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}
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func encodeCompileHead(ctx *encodeCompileContext) (*opcode, error) {
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typ := ctx.typ
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switch {
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case typ.Implements(marshalJSONType):
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return encodeCompileMarshalJSON(ctx)
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return encodeCompileMarshalJSONPtr(ctx)
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case typ.Implements(marshalTextType):
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return encodeCompileMarshalText(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return encodeCompileMarshalTextPtr(ctx)
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}
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isPtr := false
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orgType := typ
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if typ.Kind() == reflect.Ptr {
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typ = typ.Elem()
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isPtr = true
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}
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if typ.Kind() == reflect.Map {
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return encodeCompileMap(ctx.withType(typ), isPtr)
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} else if typ.Kind() == reflect.Struct {
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code, err := encodeCompileStruct(ctx.withType(typ), isPtr)
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if err != nil {
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return nil, err
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}
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encodeConvertHeadOnlyCode(code, isPtr)
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encodeOptimizeStructEnd(code)
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encodeLinkRecursiveCode(code)
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return code, nil
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} else if isPtr && typ.Implements(marshalTextType) {
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typ = orgType
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} else if isPtr && typ.Implements(marshalJSONType) {
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typ = orgType
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}
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code, err := encodeCompile(ctx.withType(typ))
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if err != nil {
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return nil, err
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}
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encodeConvertHeadOnlyCode(code, isPtr)
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encodeOptimizeStructEnd(code)
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encodeLinkRecursiveCode(code)
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return code, nil
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}
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func encodeLinkRecursiveCode(c *opcode) {
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for code := c; code.op != opEnd && code.op != opStructFieldRecursiveEnd; {
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switch code.op {
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case opStructFieldRecursive,
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opStructFieldPtrAnonymousHeadRecursive,
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opStructFieldAnonymousHeadRecursive:
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if code.jmp.linked {
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code = code.next
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continue
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}
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code.jmp.code = copyOpcode(code.jmp.code)
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c := code.jmp.code
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c.end.next = newEndOp(&encodeCompileContext{})
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c.op = c.op.ptrHeadToHead()
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beforeLastCode := c.end
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lastCode := beforeLastCode.next
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lastCode.idx = beforeLastCode.idx + uintptrSize
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lastCode.elemIdx = lastCode.idx + uintptrSize
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// extend length to alloc slot for elemIdx
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totalLength := uintptr(code.totalLength() + 1)
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nextTotalLength := uintptr(c.totalLength() + 1)
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c.end.next.op = opStructFieldRecursiveEnd
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code.jmp.curLen = totalLength
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code.jmp.nextLen = nextTotalLength
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code.jmp.linked = true
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encodeLinkRecursiveCode(code.jmp.code)
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code = code.next
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continue
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}
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switch code.op.codeType() {
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case codeArrayElem, codeSliceElem, codeMapKey:
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code = code.end
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default:
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code = code.next
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}
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}
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}
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func encodeOptimizeStructEnd(c *opcode) {
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for code := c; code.op != opEnd; {
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if code.op == opStructFieldRecursive {
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// ignore if exists recursive operation
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return
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}
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switch code.op.codeType() {
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case codeArrayElem, codeSliceElem, codeMapKey:
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code = code.end
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default:
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code = code.next
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}
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}
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for code := c; code.op != opEnd; {
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switch code.op.codeType() {
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case codeArrayElem, codeSliceElem, codeMapKey:
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code = code.end
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case codeStructEnd:
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switch code.op {
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case opStructEnd:
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prev := code.prevField
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if strings.Contains(prev.op.String(), "Head") {
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// not exists field
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code = code.next
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break
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}
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if prev.op != prev.op.fieldToEnd() {
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prev.op = prev.op.fieldToEnd()
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prev.next = code.next
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}
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code = code.next
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default:
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code = code.next
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}
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default:
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code = code.next
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}
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}
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}
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func encodeConvertHeadOnlyCode(c *opcode, isPtrHead bool) {
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if c.nextField == nil {
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return
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}
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if c.nextField.op.codeType() != codeStructEnd {
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return
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}
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switch c.op {
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case opStructFieldHead:
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encodeConvertHeadOnlyCode(c.next, false)
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if !strings.Contains(c.next.op.String(), "Only") {
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return
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}
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c.op = opStructFieldHeadOnly
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case opStructFieldHeadOmitEmpty:
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encodeConvertHeadOnlyCode(c.next, false)
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if !strings.Contains(c.next.op.String(), "Only") {
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return
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}
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c.op = opStructFieldHeadOmitEmptyOnly
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case opStructFieldHeadStringTag:
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encodeConvertHeadOnlyCode(c.next, false)
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if !strings.Contains(c.next.op.String(), "Only") {
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return
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}
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c.op = opStructFieldHeadStringTagOnly
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case opStructFieldPtrHead:
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}
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if strings.Contains(c.op.String(), "Marshal") {
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return
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}
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if strings.Contains(c.op.String(), "Slice") {
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return
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}
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if strings.Contains(c.op.String(), "Map") {
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return
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}
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isPtrOp := strings.Contains(c.op.String(), "Ptr")
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if isPtrOp && !isPtrHead {
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c.op = c.op.headToOnlyHead()
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} else if !isPtrOp && isPtrHead {
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c.op = c.op.headToPtrHead().headToOnlyHead()
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} else if isPtrOp && isPtrHead {
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c.op = c.op.headToPtrHead().headToOnlyHead()
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}
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}
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func encodeImplementsMarshaler(typ *rtype) bool {
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switch {
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case typ.Implements(marshalJSONType):
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return true
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return true
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case typ.Implements(marshalTextType):
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return true
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case rtype_ptrTo(typ).Implements(marshalTextType):
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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 encodeCompile(ctx *encodeCompileContext) (*opcode, error) {
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typ := ctx.typ
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switch {
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case typ.Implements(marshalJSONType):
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return encodeCompileMarshalJSON(ctx)
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return encodeCompileMarshalJSONPtr(ctx)
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case typ.Implements(marshalTextType):
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return encodeCompileMarshalText(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return encodeCompileMarshalTextPtr(ctx)
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}
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switch typ.Kind() {
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case reflect.Ptr:
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return encodeCompilePtr(ctx)
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case reflect.Slice:
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elem := typ.Elem()
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if !encodeImplementsMarshaler(elem) && elem.Kind() == reflect.Uint8 {
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return encodeCompileBytes(ctx)
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}
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return encodeCompileSlice(ctx)
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case reflect.Array:
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return encodeCompileArray(ctx)
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case reflect.Map:
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return encodeCompileMap(ctx, true)
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case reflect.Struct:
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return encodeCompileStruct(ctx, false)
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case reflect.Interface:
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return encodeCompileInterface(ctx)
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case reflect.Int:
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return encodeCompileInt(ctx)
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case reflect.Int8:
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return encodeCompileInt8(ctx)
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case reflect.Int16:
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return encodeCompileInt16(ctx)
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case reflect.Int32:
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return encodeCompileInt32(ctx)
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case reflect.Int64:
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return encodeCompileInt64(ctx)
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case reflect.Uint:
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return encodeCompileUint(ctx)
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case reflect.Uint8:
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return encodeCompileUint8(ctx)
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case reflect.Uint16:
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return encodeCompileUint16(ctx)
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case reflect.Uint32:
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return encodeCompileUint32(ctx)
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case reflect.Uint64:
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return encodeCompileUint64(ctx)
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case reflect.Uintptr:
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return encodeCompileUint(ctx)
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case reflect.Float32:
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return encodeCompileFloat32(ctx)
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case reflect.Float64:
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return encodeCompileFloat64(ctx)
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case reflect.String:
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return encodeCompileString(ctx)
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case reflect.Bool:
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return encodeCompileBool(ctx)
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}
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return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
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}
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func encodeCompileKey(ctx *encodeCompileContext) (*opcode, error) {
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typ := ctx.typ
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switch {
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return encodeCompileMarshalJSONPtr(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return encodeCompileMarshalTextPtr(ctx)
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}
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switch typ.Kind() {
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case reflect.Ptr:
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return encodeCompilePtr(ctx)
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case reflect.Interface:
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return encodeCompileInterface(ctx)
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case reflect.String:
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return encodeCompileString(ctx)
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case reflect.Int:
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return encodeCompileIntString(ctx)
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case reflect.Int8:
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return encodeCompileInt8String(ctx)
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case reflect.Int16:
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return encodeCompileInt16String(ctx)
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case reflect.Int32:
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return encodeCompileInt32String(ctx)
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case reflect.Int64:
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return encodeCompileInt64String(ctx)
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case reflect.Uint:
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return encodeCompileUintString(ctx)
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case reflect.Uint8:
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return encodeCompileUint8String(ctx)
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case reflect.Uint16:
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return encodeCompileUint16String(ctx)
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case reflect.Uint32:
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return encodeCompileUint32String(ctx)
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case reflect.Uint64:
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return encodeCompileUint64String(ctx)
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case reflect.Uintptr:
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return encodeCompileUintString(ctx)
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}
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return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
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}
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func encodeCompilePtr(ctx *encodeCompileContext) (*opcode, error) {
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ptrOpcodeIndex := ctx.opcodeIndex
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ptrIndex := ctx.ptrIndex
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ctx.incIndex()
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code, err := encodeCompile(ctx.withType(ctx.typ.Elem()))
|
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if err != nil {
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return nil, err
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}
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ptrHeadOp := code.op.headToPtrHead()
|
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if code.op != ptrHeadOp {
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code.op = ptrHeadOp
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code.decOpcodeIndex()
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ctx.decIndex()
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return code, nil
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}
|
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c := ctx.context()
|
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c.opcodeIndex = ptrOpcodeIndex
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c.ptrIndex = ptrIndex
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return newOpCodeWithNext(c, opPtr, code), nil
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}
|
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|
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func encodeCompileMarshalJSON(ctx *encodeCompileContext) (*opcode, error) {
|
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code := newOpCode(ctx, opMarshalJSON)
|
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ctx.incIndex()
|
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return code, nil
|
|
}
|
|
|
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func encodeCompileMarshalJSONPtr(ctx *encodeCompileContext) (*opcode, error) {
|
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code := newOpCode(ctx.withType(rtype_ptrTo(ctx.typ)), opMarshalJSON)
|
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ctx.incIndex()
|
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return code, nil
|
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}
|
|
|
|
func encodeCompileMarshalText(ctx *encodeCompileContext) (*opcode, error) {
|
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code := newOpCode(ctx, opMarshalText)
|
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ctx.incIndex()
|
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return code, nil
|
|
}
|
|
|
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func encodeCompileMarshalTextPtr(ctx *encodeCompileContext) (*opcode, error) {
|
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code := newOpCode(ctx.withType(rtype_ptrTo(ctx.typ)), opMarshalText)
|
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ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt8(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt8)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt16(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt16)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt32(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt32)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt64(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt64)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint8(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint8)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint16(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint16)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint32(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint32)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint64(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint64)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileIntString(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opIntString)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt8String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt8String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt16String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt16String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt32String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt32String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInt64String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opInt64String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUintString(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUintString)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint8String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint8String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint16String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint16String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint32String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint32String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileUint64String(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opUint64String)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileFloat32(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opFloat32)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileFloat64(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opFloat64)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileString(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opString)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileBool(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opBool)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileBytes(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newOpCode(ctx, opBytes)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileInterface(ctx *encodeCompileContext) (*opcode, error) {
|
|
code := newInterfaceCode(ctx)
|
|
ctx.incIndex()
|
|
return code, nil
|
|
}
|
|
|
|
func encodeCompileSlice(ctx *encodeCompileContext) (*opcode, error) {
|
|
ctx.root = false
|
|
elem := ctx.typ.Elem()
|
|
size := elem.Size()
|
|
|
|
header := newSliceHeaderCode(ctx)
|
|
ctx.incIndex()
|
|
|
|
code, err := encodeCompile(ctx.withType(ctx.typ.Elem()).incIndent())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// header => opcode => elem => end
|
|
// ^ |
|
|
// |________|
|
|
|
|
elemCode := newSliceElemCode(ctx, header, size)
|
|
ctx.incIndex()
|
|
|
|
end := newOpCode(ctx, opSliceEnd)
|
|
ctx.incIndex()
|
|
|
|
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 encodeCompileArray(ctx *encodeCompileContext) (*opcode, error) {
|
|
ctx.root = false
|
|
typ := ctx.typ
|
|
elem := typ.Elem()
|
|
alen := typ.Len()
|
|
size := elem.Size()
|
|
|
|
header := newArrayHeaderCode(ctx, alen)
|
|
ctx.incIndex()
|
|
|
|
code, err := encodeCompile(ctx.withType(elem).incIndent())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// header => opcode => elem => end
|
|
// ^ |
|
|
// |________|
|
|
|
|
elemCode := newArrayElemCode(ctx, header, alen, size)
|
|
ctx.incIndex()
|
|
|
|
end := newOpCode(ctx, opArrayEnd)
|
|
ctx.incIndex()
|
|
|
|
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 encodeCompileMap(ctx *encodeCompileContext, withLoad bool) (*opcode, error) {
|
|
// header => code => value => code => key => code => value => code => end
|
|
// ^ |
|
|
// |_______________________|
|
|
ctx = ctx.incIndent()
|
|
header := newMapHeaderCode(ctx, withLoad)
|
|
ctx.incIndex()
|
|
|
|
typ := ctx.typ
|
|
keyType := ctx.typ.Key()
|
|
keyCode, err := encodeCompileKey(ctx.withType(keyType))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
value := newMapValueCode(ctx, header)
|
|
ctx.incIndex()
|
|
|
|
valueType := typ.Elem()
|
|
valueCode, err := encodeCompile(ctx.withType(valueType))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
key := newMapKeyCode(ctx, header)
|
|
ctx.incIndex()
|
|
|
|
ctx = ctx.decIndent()
|
|
|
|
header.mapKey = key
|
|
header.mapValue = value
|
|
|
|
end := newMapEndCode(ctx, header)
|
|
ctx.incIndex()
|
|
|
|
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
|
|
value.end = end
|
|
|
|
return (*opcode)(unsafe.Pointer(header)), nil
|
|
}
|
|
|
|
func encodeTypeToHeaderType(ctx *encodeCompileContext, code *opcode) opType {
|
|
switch code.op {
|
|
case opPtr:
|
|
ptrNum := 1
|
|
c := code
|
|
ctx.decIndex()
|
|
for {
|
|
if code.next.op == opPtr {
|
|
ptrNum++
|
|
code = code.next
|
|
ctx.decIndex()
|
|
}
|
|
break
|
|
}
|
|
c.ptrNum = ptrNum
|
|
if ptrNum > 1 {
|
|
switch code.next.op {
|
|
case opInt:
|
|
return opStructFieldHeadIntNPtr
|
|
case opInt8:
|
|
return opStructFieldHeadInt8NPtr
|
|
case opInt16:
|
|
return opStructFieldHeadInt16NPtr
|
|
case opInt32:
|
|
return opStructFieldHeadInt32NPtr
|
|
case opInt64:
|
|
return opStructFieldHeadInt64NPtr
|
|
case opUint:
|
|
return opStructFieldHeadUintNPtr
|
|
case opUint8:
|
|
return opStructFieldHeadUint8NPtr
|
|
case opUint16:
|
|
return opStructFieldHeadUint16NPtr
|
|
case opUint32:
|
|
return opStructFieldHeadUint32NPtr
|
|
case opUint64:
|
|
return opStructFieldHeadUint64NPtr
|
|
case opFloat32:
|
|
return opStructFieldHeadFloat32NPtr
|
|
case opFloat64:
|
|
return opStructFieldHeadFloat64NPtr
|
|
case opString:
|
|
return opStructFieldHeadStringNPtr
|
|
case opBool:
|
|
return opStructFieldHeadBoolNPtr
|
|
}
|
|
} else {
|
|
switch code.next.op {
|
|
case opInt:
|
|
return opStructFieldHeadIntPtr
|
|
case opInt8:
|
|
return opStructFieldHeadInt8Ptr
|
|
case opInt16:
|
|
return opStructFieldHeadInt16Ptr
|
|
case opInt32:
|
|
return opStructFieldHeadInt32Ptr
|
|
case opInt64:
|
|
return opStructFieldHeadInt64Ptr
|
|
case opUint:
|
|
return opStructFieldHeadUintPtr
|
|
case opUint8:
|
|
return opStructFieldHeadUint8Ptr
|
|
case opUint16:
|
|
return opStructFieldHeadUint16Ptr
|
|
case opUint32:
|
|
return opStructFieldHeadUint32Ptr
|
|
case opUint64:
|
|
return opStructFieldHeadUint64Ptr
|
|
case opFloat32:
|
|
return opStructFieldHeadFloat32Ptr
|
|
case opFloat64:
|
|
return opStructFieldHeadFloat64Ptr
|
|
case opString:
|
|
return opStructFieldHeadStringPtr
|
|
case opBool:
|
|
return opStructFieldHeadBoolPtr
|
|
}
|
|
}
|
|
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 opArrayHead:
|
|
return opStructFieldHeadArray
|
|
case opSliceHead:
|
|
return opStructFieldHeadSlice
|
|
case opStructFieldHead:
|
|
return opStructFieldHeadStruct
|
|
case opMarshalJSON:
|
|
return opStructFieldHeadMarshalJSON
|
|
case opMarshalText:
|
|
return opStructFieldHeadMarshalText
|
|
}
|
|
return opStructFieldHead
|
|
}
|
|
|
|
func encodeTypeToFieldType(ctx *encodeCompileContext, code *opcode) opType {
|
|
switch code.op {
|
|
case opPtr:
|
|
ptrNum := 1
|
|
ctx.decIndex()
|
|
c := code
|
|
for {
|
|
if code.next.op == opPtr {
|
|
ptrNum++
|
|
code = code.next
|
|
ctx.decIndex()
|
|
}
|
|
break
|
|
}
|
|
c.ptrNum = ptrNum
|
|
if ptrNum > 1 {
|
|
switch code.next.op {
|
|
case opInt:
|
|
return opStructFieldIntNPtr
|
|
case opInt8:
|
|
return opStructFieldInt8NPtr
|
|
case opInt16:
|
|
return opStructFieldInt16NPtr
|
|
case opInt32:
|
|
return opStructFieldInt32NPtr
|
|
case opInt64:
|
|
return opStructFieldInt64NPtr
|
|
case opUint:
|
|
return opStructFieldUintNPtr
|
|
case opUint8:
|
|
return opStructFieldUint8NPtr
|
|
case opUint16:
|
|
return opStructFieldUint16NPtr
|
|
case opUint32:
|
|
return opStructFieldUint32NPtr
|
|
case opUint64:
|
|
return opStructFieldUint64NPtr
|
|
case opFloat32:
|
|
return opStructFieldFloat32NPtr
|
|
case opFloat64:
|
|
return opStructFieldFloat64NPtr
|
|
case opString:
|
|
return opStructFieldStringNPtr
|
|
case opBool:
|
|
return opStructFieldBoolNPtr
|
|
}
|
|
} else {
|
|
switch code.next.op {
|
|
case opInt:
|
|
return opStructFieldIntPtr
|
|
case opInt8:
|
|
return opStructFieldInt8Ptr
|
|
case opInt16:
|
|
return opStructFieldInt16Ptr
|
|
case opInt32:
|
|
return opStructFieldInt32Ptr
|
|
case opInt64:
|
|
return opStructFieldInt64Ptr
|
|
case opUint:
|
|
return opStructFieldUintPtr
|
|
case opUint8:
|
|
return opStructFieldUint8Ptr
|
|
case opUint16:
|
|
return opStructFieldUint16Ptr
|
|
case opUint32:
|
|
return opStructFieldUint32Ptr
|
|
case opUint64:
|
|
return opStructFieldUint64Ptr
|
|
case opFloat32:
|
|
return opStructFieldFloat32Ptr
|
|
case opFloat64:
|
|
return opStructFieldFloat64Ptr
|
|
case opString:
|
|
return opStructFieldStringPtr
|
|
case opBool:
|
|
return opStructFieldBoolPtr
|
|
}
|
|
}
|
|
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 opArrayHead:
|
|
return opStructFieldArray
|
|
case opSliceHead:
|
|
return opStructFieldSlice
|
|
case opStructFieldHead:
|
|
return opStructFieldStruct
|
|
case opMarshalJSON:
|
|
return opStructFieldMarshalJSON
|
|
case opMarshalText:
|
|
return opStructFieldMarshalText
|
|
}
|
|
return opStructField
|
|
}
|
|
|
|
func encodeOptimizeStructHeader(ctx *encodeCompileContext, code *opcode, tag *structTag) opType {
|
|
headType := encodeTypeToHeaderType(ctx, code)
|
|
switch {
|
|
case tag.isOmitEmpty:
|
|
headType = headType.headToOmitEmptyHead()
|
|
case tag.isString:
|
|
headType = headType.headToStringTagHead()
|
|
}
|
|
return headType
|
|
}
|
|
|
|
func encodeOptimizeStructField(ctx *encodeCompileContext, code *opcode, tag *structTag) opType {
|
|
fieldType := encodeTypeToFieldType(ctx, code)
|
|
switch {
|
|
case tag.isOmitEmpty:
|
|
fieldType = fieldType.fieldToOmitEmptyField()
|
|
case tag.isString:
|
|
fieldType = fieldType.fieldToStringTagField()
|
|
}
|
|
return fieldType
|
|
}
|
|
|
|
func encodeRecursiveCode(ctx *encodeCompileContext, jmp *compiledCode) *opcode {
|
|
code := newRecursiveCode(ctx, jmp)
|
|
ctx.incIndex()
|
|
return code
|
|
}
|
|
|
|
func encodeCompiledCode(ctx *encodeCompileContext) *opcode {
|
|
typ := ctx.typ
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
if compiledCode, exists := ctx.structTypeToCompiledCode[typeptr]; exists {
|
|
return encodeRecursiveCode(ctx, compiledCode)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func encodeStructHeader(ctx *encodeCompileContext, fieldCode *opcode, valueCode *opcode, tag *structTag) *opcode {
|
|
fieldCode.indent--
|
|
op := encodeOptimizeStructHeader(ctx, valueCode, tag)
|
|
fieldCode.op = op
|
|
fieldCode.ptrNum = valueCode.ptrNum
|
|
switch op {
|
|
case opStructFieldHead,
|
|
opStructFieldHeadSlice,
|
|
opStructFieldHeadArray,
|
|
opStructFieldHeadMap,
|
|
opStructFieldHeadMapLoad,
|
|
opStructFieldHeadStruct,
|
|
opStructFieldHeadOmitEmpty,
|
|
opStructFieldHeadOmitEmptySlice,
|
|
opStructFieldHeadOmitEmptyArray,
|
|
opStructFieldHeadOmitEmptyMap,
|
|
opStructFieldHeadOmitEmptyMapLoad,
|
|
opStructFieldHeadOmitEmptyStruct,
|
|
opStructFieldHeadStringTag:
|
|
return valueCode.beforeLastCode()
|
|
}
|
|
ctx.decOpcodeIndex()
|
|
return (*opcode)(unsafe.Pointer(fieldCode))
|
|
}
|
|
|
|
func encodeStructField(ctx *encodeCompileContext, fieldCode *opcode, valueCode *opcode, tag *structTag) *opcode {
|
|
code := (*opcode)(unsafe.Pointer(fieldCode))
|
|
op := encodeOptimizeStructField(ctx, valueCode, tag)
|
|
fieldCode.op = op
|
|
fieldCode.ptrNum = valueCode.ptrNum
|
|
switch op {
|
|
case opStructField,
|
|
opStructFieldSlice,
|
|
opStructFieldArray,
|
|
opStructFieldMap,
|
|
opStructFieldMapLoad,
|
|
opStructFieldStruct,
|
|
opStructFieldOmitEmpty,
|
|
opStructFieldOmitEmptySlice,
|
|
opStructFieldOmitEmptyArray,
|
|
opStructFieldOmitEmptyMap,
|
|
opStructFieldOmitEmptyMapLoad,
|
|
opStructFieldOmitEmptyStruct,
|
|
opStructFieldStringTag:
|
|
return valueCode.beforeLastCode()
|
|
}
|
|
ctx.decIndex()
|
|
return code
|
|
}
|
|
|
|
func encodeIsNotExistsField(head *opcode) 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 encodeIsNotExistsField(head.next)
|
|
}
|
|
|
|
func encodeOptimizeAnonymousFields(head *opcode) {
|
|
code := head
|
|
var prev *opcode
|
|
removedFields := map[*opcode]struct{}{}
|
|
for {
|
|
if code.op == opStructEnd {
|
|
break
|
|
}
|
|
if code.op == opStructField {
|
|
codeType := code.next.op.codeType()
|
|
if codeType == codeStructField {
|
|
if encodeIsNotExistsField(code.next) {
|
|
code.next = code.nextField
|
|
diff := code.next.displayIdx - code.displayIdx
|
|
for i := 0; i < diff; i++ {
|
|
code.next.decOpcodeIndex()
|
|
}
|
|
encodeLinkPrevToNextField(code, removedFields)
|
|
code = prev
|
|
}
|
|
}
|
|
}
|
|
prev = code
|
|
code = code.nextField
|
|
}
|
|
}
|
|
|
|
type structFieldPair struct {
|
|
prevField *opcode
|
|
curField *opcode
|
|
isTaggedKey bool
|
|
linked bool
|
|
}
|
|
|
|
func encodeAnonymousStructFieldPairMap(typ *rtype, tags structTags, named string, valueCode *opcode) map[string][]structFieldPair {
|
|
anonymousFields := map[string][]structFieldPair{}
|
|
f := valueCode
|
|
var prevAnonymousField *opcode
|
|
removedFields := map[*opcode]struct{}{}
|
|
for {
|
|
existsKey := tags.existsKey(f.displayKey)
|
|
op := f.op.headToAnonymousHead()
|
|
if existsKey && (f.next.op == opStructFieldPtrAnonymousHeadRecursive || f.next.op == opStructFieldAnonymousHeadRecursive) {
|
|
// through
|
|
} else if op != f.op {
|
|
if existsKey {
|
|
f.op = opStructFieldAnonymousHead
|
|
} else if named == "" {
|
|
f.op = op
|
|
}
|
|
} else if named == "" && f.op == opStructEnd {
|
|
f.op = opStructAnonymousEnd
|
|
} else if existsKey {
|
|
diff := f.nextField.displayIdx - f.displayIdx
|
|
for i := 0; i < diff; i++ {
|
|
f.nextField.decOpcodeIndex()
|
|
}
|
|
encodeLinkPrevToNextField(f, removedFields)
|
|
}
|
|
|
|
if f.displayKey == "" {
|
|
if f.nextField == nil {
|
|
break
|
|
}
|
|
prevAnonymousField = f
|
|
f = f.nextField
|
|
continue
|
|
}
|
|
|
|
key := fmt.Sprintf("%s.%s", named, f.displayKey)
|
|
anonymousFields[key] = append(anonymousFields[key], 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 encodeAnonymousStructFieldPairMap(typ, tags, named, f.next) {
|
|
anonymousFields[k] = append(anonymousFields[k], v...)
|
|
}
|
|
}
|
|
if f.nextField == nil {
|
|
break
|
|
}
|
|
prevAnonymousField = f
|
|
f = f.nextField
|
|
}
|
|
return anonymousFields
|
|
}
|
|
|
|
func encodeOptimizeConflictAnonymousFields(anonymousFields map[string][]structFieldPair) {
|
|
removedFields := map[*opcode]struct{}{}
|
|
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 {
|
|
diff := fieldPair.curField.nextField.displayIdx - fieldPair.curField.displayIdx
|
|
for i := 0; i < diff; i++ {
|
|
fieldPair.curField.nextField.decOpcodeIndex()
|
|
}
|
|
removedFields[fieldPair.curField] = struct{}{}
|
|
encodeLinkPrevToNextField(fieldPair.curField, removedFields)
|
|
}
|
|
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 {
|
|
diff := fieldPair.curField.nextField.displayIdx - fieldPair.curField.displayIdx
|
|
removedFields[fieldPair.curField] = struct{}{}
|
|
for i := 0; i < diff; i++ {
|
|
fieldPair.curField.nextField.decOpcodeIndex()
|
|
}
|
|
encodeLinkPrevToNextField(fieldPair.curField, removedFields)
|
|
}
|
|
fieldPair.linked = true
|
|
}
|
|
}
|
|
} else {
|
|
for _, fieldPair := range taggedPairs {
|
|
fieldPair.curField.isTaggedKey = false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func encodeCompileStruct(ctx *encodeCompileContext, isPtr bool) (*opcode, error) {
|
|
ctx.root = false
|
|
if code := encodeCompiledCode(ctx); code != nil {
|
|
return code, nil
|
|
}
|
|
typ := ctx.typ
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
compiled := &compiledCode{}
|
|
ctx.structTypeToCompiledCode[typeptr] = compiled
|
|
// header => code => structField => code => end
|
|
// ^ |
|
|
// |__________|
|
|
fieldNum := typ.NumField()
|
|
fieldIdx := 0
|
|
var (
|
|
head *opcode
|
|
code *opcode
|
|
prevField *opcode
|
|
)
|
|
ctx = ctx.incIndent()
|
|
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)
|
|
}
|
|
}
|
|
fieldOpcodeIndex := ctx.opcodeIndex
|
|
fieldPtrIndex := ctx.ptrIndex
|
|
ctx.incIndex()
|
|
valueCode, err := encodeCompile(ctx.withType(fieldType))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if field.Anonymous {
|
|
if valueCode.op == opPtr && valueCode.next.op == opStructFieldRecursive {
|
|
valueCode = valueCode.next
|
|
valueCode.decOpcodeIndex()
|
|
ctx.decIndex()
|
|
valueCode.op = opStructFieldPtrHeadRecursive
|
|
}
|
|
tagKey := ""
|
|
if tag.isTaggedKey {
|
|
tagKey = tag.key
|
|
}
|
|
for k, v := range encodeAnonymousStructFieldPairMap(typ, tags, tagKey, valueCode) {
|
|
anonymousFields[k] = append(anonymousFields[k], v...)
|
|
}
|
|
}
|
|
key := fmt.Sprintf(`"%s":`, tag.key)
|
|
escapedKey := fmt.Sprintf(`%s:`, string(encodeEscapedString([]byte{}, tag.key)))
|
|
fieldCode := &opcode{
|
|
typ: valueCode.typ,
|
|
displayIdx: fieldOpcodeIndex,
|
|
idx: opcodeOffset(fieldPtrIndex),
|
|
next: valueCode,
|
|
indent: ctx.indent,
|
|
anonymousKey: field.Anonymous,
|
|
key: []byte(key),
|
|
escapedKey: []byte(escapedKey),
|
|
isTaggedKey: tag.isTaggedKey,
|
|
displayKey: tag.key,
|
|
offset: field.Offset,
|
|
}
|
|
if fieldIdx == 0 {
|
|
fieldCode.headIdx = fieldCode.idx
|
|
code = encodeStructHeader(ctx, fieldCode, valueCode, tag)
|
|
head = fieldCode
|
|
prevField = fieldCode
|
|
} else {
|
|
fieldCode.headIdx = head.headIdx
|
|
code.next = fieldCode
|
|
code = encodeStructField(ctx, fieldCode, valueCode, tag)
|
|
prevField.nextField = fieldCode
|
|
fieldCode.prevField = prevField
|
|
prevField = fieldCode
|
|
}
|
|
fieldIdx++
|
|
}
|
|
ctx = ctx.decIndent()
|
|
|
|
structEndCode := &opcode{
|
|
op: opStructEnd,
|
|
typ: nil,
|
|
indent: ctx.indent,
|
|
next: newEndOp(ctx),
|
|
}
|
|
|
|
// no struct field
|
|
if head == nil {
|
|
head = &opcode{
|
|
op: opStructFieldHead,
|
|
typ: typ,
|
|
displayIdx: ctx.opcodeIndex,
|
|
idx: opcodeOffset(ctx.ptrIndex),
|
|
headIdx: opcodeOffset(ctx.ptrIndex),
|
|
indent: ctx.indent,
|
|
nextField: structEndCode,
|
|
}
|
|
structEndCode.prevField = head
|
|
ctx.incIndex()
|
|
code = head
|
|
}
|
|
|
|
structEndCode.displayIdx = ctx.opcodeIndex
|
|
structEndCode.idx = opcodeOffset(ctx.ptrIndex)
|
|
ctx.incIndex()
|
|
|
|
if prevField != nil && prevField.nextField == nil {
|
|
prevField.nextField = structEndCode
|
|
structEndCode.prevField = prevField
|
|
}
|
|
|
|
head.end = structEndCode
|
|
code.next = structEndCode
|
|
encodeOptimizeConflictAnonymousFields(anonymousFields)
|
|
encodeOptimizeAnonymousFields(head)
|
|
ret := (*opcode)(unsafe.Pointer(head))
|
|
compiled.code = ret
|
|
|
|
delete(ctx.structTypeToCompiledCode, typeptr)
|
|
|
|
return ret, nil
|
|
}
|