forked from mirror/go-json
1003 lines
25 KiB
Go
1003 lines
25 KiB
Go
package json
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import (
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"fmt"
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"reflect"
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"unsafe"
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)
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func (e *Encoder) compileHead(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 e.compileMarshalJSON(ctx)
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return e.compileMarshalJSONPtr(ctx)
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case typ.Implements(marshalTextType):
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return e.compileMarshalText(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return e.compileMarshalTextPtr(ctx)
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}
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isPtr := false
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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 e.compileMap(ctx.withType(typ), isPtr)
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} else if typ.Kind() == reflect.Struct {
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return e.compileStruct(ctx.withType(typ), isPtr)
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}
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return e.compile(ctx.withType(typ))
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}
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func (e *Encoder) implementsMarshaler(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 (e *Encoder) compile(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 e.compileMarshalJSON(ctx)
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return e.compileMarshalJSONPtr(ctx)
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case typ.Implements(marshalTextType):
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return e.compileMarshalText(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return e.compileMarshalTextPtr(ctx)
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}
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switch typ.Kind() {
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case reflect.Ptr:
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return e.compilePtr(ctx)
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case reflect.Slice:
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elem := typ.Elem()
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if !e.implementsMarshaler(elem) && elem.Kind() == reflect.Uint8 {
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return e.compileBytes(ctx)
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}
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return e.compileSlice(ctx)
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case reflect.Array:
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return e.compileArray(ctx)
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case reflect.Map:
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return e.compileMap(ctx, true)
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case reflect.Struct:
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return e.compileStruct(ctx, false)
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case reflect.Interface:
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return e.compileInterface(ctx)
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case reflect.Int:
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return e.compileInt(ctx)
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case reflect.Int8:
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return e.compileInt8(ctx)
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case reflect.Int16:
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return e.compileInt16(ctx)
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case reflect.Int32:
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return e.compileInt32(ctx)
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case reflect.Int64:
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return e.compileInt64(ctx)
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case reflect.Uint:
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return e.compileUint(ctx)
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case reflect.Uint8:
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return e.compileUint8(ctx)
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case reflect.Uint16:
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return e.compileUint16(ctx)
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case reflect.Uint32:
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return e.compileUint32(ctx)
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case reflect.Uint64:
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return e.compileUint64(ctx)
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case reflect.Uintptr:
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return e.compileUint(ctx)
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case reflect.Float32:
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return e.compileFloat32(ctx)
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case reflect.Float64:
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return e.compileFloat64(ctx)
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case reflect.String:
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return e.compileString(ctx)
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case reflect.Bool:
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return e.compileBool(ctx)
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}
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return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
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}
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func (e *Encoder) compileKey(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 e.compileMarshalJSON(ctx)
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case rtype_ptrTo(typ).Implements(marshalJSONType):
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return e.compileMarshalJSONPtr(ctx)
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case typ.Implements(marshalTextType):
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return e.compileMarshalText(ctx)
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case rtype_ptrTo(typ).Implements(marshalTextType):
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return e.compileMarshalTextPtr(ctx)
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}
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switch typ.Kind() {
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case reflect.Ptr:
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return e.compilePtr(ctx)
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case reflect.Interface:
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return e.compileInterface(ctx)
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case reflect.String:
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return e.compileString(ctx)
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}
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return nil, &UnsupportedTypeError{Type: rtype2type(typ)}
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}
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func (e *Encoder) compilePtr(ctx *encodeCompileContext) (*opcode, error) {
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ptrOpcodeIndex := ctx.opcodeIndex
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ctx.incOpcodeIndex()
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code, err := e.compile(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.decOpcodeIndex()
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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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return newOpCodeWithNext(c, opPtr, code), nil
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}
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func (e *Encoder) compileMarshalJSON(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opMarshalJSON)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileMarshalJSONPtr(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx.withType(rtype_ptrTo(ctx.typ)), opMarshalJSON)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileMarshalText(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opMarshalText)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileMarshalTextPtr(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx.withType(rtype_ptrTo(ctx.typ)), opMarshalText)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInt(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opInt)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInt8(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opInt8)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInt16(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opInt16)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInt32(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opInt32)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInt64(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opInt64)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileUint(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opUint)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileUint8(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opUint8)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileUint16(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opUint16)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileUint32(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opUint32)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileUint64(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opUint64)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileFloat32(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opFloat32)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileFloat64(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opFloat64)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileString(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opString)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileBool(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opBool)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileBytes(ctx *encodeCompileContext) (*opcode, error) {
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code := newOpCode(ctx, opBytes)
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileInterface(ctx *encodeCompileContext) (*opcode, error) {
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code := (*opcode)(unsafe.Pointer(&interfaceCode{
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opcodeHeader: &opcodeHeader{
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op: opInterface,
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typ: ctx.typ,
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idx: ctx.opcodeIndex,
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indent: ctx.indent,
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next: newEndOp(ctx),
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},
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root: ctx.root,
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}))
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ctx.incOpcodeIndex()
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return code, nil
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}
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func (e *Encoder) compileSlice(ctx *encodeCompileContext) (*opcode, error) {
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ctx.root = false
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elem := ctx.typ.Elem()
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size := elem.Size()
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header := newSliceHeaderCode(ctx)
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ctx.incOpcodeIndex()
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code, err := e.compile(ctx.withType(ctx.typ.Elem()).incIndent())
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if err != nil {
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return nil, err
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}
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// header => opcode => elem => end
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// ^ |
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// |________|
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elemCode := newSliceElemCode(ctx, size)
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ctx.incOpcodeIndex()
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end := newOpCode(ctx, opSliceEnd)
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ctx.incOpcodeIndex()
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if ctx.withIndent {
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if ctx.root {
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header.op = opRootSliceHeadIndent
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elemCode.op = opRootSliceElemIndent
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} else {
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header.op = opSliceHeadIndent
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elemCode.op = opSliceElemIndent
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}
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end.op = opSliceEndIndent
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}
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header.elem = elemCode
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header.end = end
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header.next = code
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code.beforeLastCode().next = (*opcode)(unsafe.Pointer(elemCode))
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elemCode.next = code
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elemCode.end = end
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return (*opcode)(unsafe.Pointer(header)), nil
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}
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func (e *Encoder) compileArray(ctx *encodeCompileContext) (*opcode, error) {
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ctx.root = false
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typ := ctx.typ
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elem := typ.Elem()
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alen := typ.Len()
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size := elem.Size()
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header := newArrayHeaderCode(ctx, alen)
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ctx.incOpcodeIndex()
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code, err := e.compile(ctx.withType(elem).incIndent())
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if err != nil {
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return nil, err
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}
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// header => opcode => elem => end
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// ^ |
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// |________|
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elemCode := newArrayElemCode(ctx, alen, size)
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ctx.incOpcodeIndex()
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end := newOpCode(ctx, opArrayEnd)
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ctx.incOpcodeIndex()
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if ctx.withIndent {
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header.op = opArrayHeadIndent
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elemCode.op = opArrayElemIndent
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end.op = opArrayEndIndent
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}
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header.elem = elemCode
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header.end = end
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header.next = code
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code.beforeLastCode().next = (*opcode)(unsafe.Pointer(elemCode))
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elemCode.next = code
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elemCode.end = end
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return (*opcode)(unsafe.Pointer(header)), nil
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}
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//go:linkname mapiterinit reflect.mapiterinit
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//go:noescape
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func mapiterinit(mapType *rtype, m unsafe.Pointer) unsafe.Pointer
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//go:linkname mapiterkey reflect.mapiterkey
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//go:noescape
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func mapiterkey(it unsafe.Pointer) unsafe.Pointer
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//go:linkname mapiternext reflect.mapiternext
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//go:noescape
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func mapiternext(it unsafe.Pointer)
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//go:linkname maplen reflect.maplen
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//go:noescape
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func maplen(m unsafe.Pointer) int
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func (e *Encoder) compileMap(ctx *encodeCompileContext, withLoad bool) (*opcode, error) {
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// header => code => value => code => key => code => value => code => end
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// ^ |
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// |_______________________|
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ctx = ctx.incIndent()
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header := newMapHeaderCode(ctx, withLoad)
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ctx.incOpcodeIndex()
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typ := ctx.typ
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keyType := ctx.typ.Key()
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keyCode, err := e.compileKey(ctx.withType(keyType))
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if err != nil {
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return nil, err
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}
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value := newMapValueCode(ctx)
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ctx.incOpcodeIndex()
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valueType := typ.Elem()
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valueCode, err := e.compile(ctx.withType(valueType))
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if err != nil {
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return nil, err
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}
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key := newMapKeyCode(ctx)
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ctx.incOpcodeIndex()
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ctx = ctx.decIndent()
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header.key = key
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header.value = value
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end := newOpCode(ctx, opMapEnd)
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ctx.incOpcodeIndex()
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if ctx.withIndent {
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if header.op == opMapHead {
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if ctx.root {
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header.op = opRootMapHeadIndent
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} else {
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header.op = opMapHeadIndent
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}
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} else {
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header.op = opMapHeadLoadIndent
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}
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if ctx.root {
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key.op = opRootMapKeyIndent
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} else {
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key.op = opMapKeyIndent
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}
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value.op = opMapValueIndent
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end.op = opMapEndIndent
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}
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header.next = keyCode
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keyCode.beforeLastCode().next = (*opcode)(unsafe.Pointer(value))
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value.next = valueCode
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valueCode.beforeLastCode().next = (*opcode)(unsafe.Pointer(key))
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key.next = keyCode
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header.end = end
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key.end = end
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return (*opcode)(unsafe.Pointer(header)), nil
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}
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|
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func (e *Encoder) typeToHeaderType(op opType) opType {
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switch op {
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case opInt:
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return opStructFieldHeadInt
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case opInt8:
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return opStructFieldHeadInt8
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|
case opInt16:
|
|
return opStructFieldHeadInt16
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|
case opInt32:
|
|
return opStructFieldHeadInt32
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|
case opInt64:
|
|
return opStructFieldHeadInt64
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|
case opUint:
|
|
return opStructFieldHeadUint
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|
case opUint8:
|
|
return opStructFieldHeadUint8
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|
case opUint16:
|
|
return opStructFieldHeadUint16
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|
case opUint32:
|
|
return opStructFieldHeadUint32
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|
case opUint64:
|
|
return opStructFieldHeadUint64
|
|
case opFloat32:
|
|
return opStructFieldHeadFloat32
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|
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
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|
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(ctx *encodeCompileContext, code *compiledCode) *opcode {
|
|
c := (*opcode)(unsafe.Pointer(&recursiveCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructFieldRecursive,
|
|
typ: ctx.typ,
|
|
idx: ctx.opcodeIndex,
|
|
indent: ctx.indent,
|
|
next: newEndOp(ctx),
|
|
},
|
|
jmp: code,
|
|
}))
|
|
ctx.incOpcodeIndex()
|
|
return c
|
|
}
|
|
|
|
func (e *Encoder) compiledCode(ctx *encodeCompileContext) *opcode {
|
|
typ := ctx.typ
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
if ctx.withIndent {
|
|
if compiledCode, exists := e.structTypeToCompiledIndentCode[typeptr]; exists {
|
|
return e.recursiveCode(ctx, compiledCode)
|
|
}
|
|
} else {
|
|
if compiledCode, exists := e.structTypeToCompiledCode[typeptr]; exists {
|
|
return e.recursiveCode(ctx, compiledCode)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (e *Encoder) structHeader(ctx *encodeCompileContext, fieldCode *structFieldCode, valueCode *opcode, tag *structTag) *opcode {
|
|
fieldCode.indent--
|
|
op := e.optimizeStructHeader(valueCode.op, tag, ctx.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()
|
|
}
|
|
ctx.decOpcodeIndex()
|
|
return (*opcode)(unsafe.Pointer(fieldCode))
|
|
}
|
|
|
|
func (e *Encoder) structField(ctx *encodeCompileContext, fieldCode *structFieldCode, valueCode *opcode, tag *structTag) *opcode {
|
|
code := (*opcode)(unsafe.Pointer(fieldCode))
|
|
op := e.optimizeStructField(valueCode.op, tag, ctx.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()
|
|
}
|
|
ctx.decOpcodeIndex()
|
|
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
|
|
diff := code.next.idx - code.idx
|
|
for i := 0; i < diff; i++ {
|
|
code.next.decOpcodeIndex()
|
|
}
|
|
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 {
|
|
diff := f.nextField.idx - f.idx
|
|
for i := 0; i < diff; i++ {
|
|
f.nextField.decOpcodeIndex()
|
|
}
|
|
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 {
|
|
diff := fieldPair.curField.nextField.idx - fieldPair.curField.idx
|
|
for i := 0; i < diff; i++ {
|
|
fieldPair.curField.nextField.decOpcodeIndex()
|
|
}
|
|
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 {
|
|
diff := fieldPair.curField.nextField.idx - fieldPair.curField.idx
|
|
for i := 0; i < diff; i++ {
|
|
fieldPair.curField.nextField.decOpcodeIndex()
|
|
}
|
|
linkPrevToNextField(fieldPair.prevField, fieldPair.curField)
|
|
}
|
|
fieldPair.linked = true
|
|
}
|
|
}
|
|
} else {
|
|
for _, fieldPair := range taggedPairs {
|
|
fieldPair.curField.isTaggedKey = false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (e *Encoder) compileStruct(ctx *encodeCompileContext, isPtr bool) (*opcode, error) {
|
|
ctx.root = false
|
|
if code := e.compiledCode(ctx); code != nil {
|
|
return code, nil
|
|
}
|
|
typ := ctx.typ
|
|
typeptr := uintptr(unsafe.Pointer(typ))
|
|
compiled := &compiledCode{}
|
|
if ctx.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
|
|
)
|
|
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
|
|
ctx.incOpcodeIndex()
|
|
valueCode, err := e.compile(ctx.withType(fieldType))
|
|
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
|
|
ctx.decOpcodeIndex()
|
|
}
|
|
}
|
|
key := fmt.Sprintf(`"%s":`, tag.key)
|
|
fieldCode := &structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
typ: valueCode.typ,
|
|
idx: fieldOpcodeIndex,
|
|
next: valueCode,
|
|
indent: ctx.indent,
|
|
},
|
|
anonymousKey: field.Anonymous,
|
|
key: []byte(key),
|
|
isTaggedKey: tag.isTaggedKey,
|
|
displayKey: tag.key,
|
|
offset: field.Offset,
|
|
}
|
|
if fieldIdx == 0 {
|
|
code = e.structHeader(ctx, fieldCode, valueCode, tag)
|
|
head = fieldCode
|
|
prevField = fieldCode
|
|
} else {
|
|
fcode := (*opcode)(unsafe.Pointer(fieldCode))
|
|
code.next = fcode
|
|
code = e.structField(ctx, fieldCode, valueCode, tag)
|
|
prevField.nextField = fcode
|
|
prevField = fieldCode
|
|
}
|
|
fieldIdx++
|
|
}
|
|
ctx = ctx.decIndent()
|
|
|
|
structEndCode := (*opcode)(unsafe.Pointer(&structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructEnd,
|
|
typ: nil,
|
|
indent: ctx.indent,
|
|
next: newEndOp(ctx),
|
|
},
|
|
}))
|
|
|
|
// no struct field
|
|
if head == nil {
|
|
head = &structFieldCode{
|
|
opcodeHeader: &opcodeHeader{
|
|
op: opStructFieldHead,
|
|
typ: typ,
|
|
idx: ctx.opcodeIndex,
|
|
indent: ctx.indent,
|
|
},
|
|
nextField: structEndCode,
|
|
}
|
|
ctx.incOpcodeIndex()
|
|
if ctx.withIndent {
|
|
head.op = opStructFieldHeadIndent
|
|
}
|
|
code = (*opcode)(unsafe.Pointer(head))
|
|
}
|
|
|
|
structEndCode.idx = ctx.opcodeIndex
|
|
ctx.incOpcodeIndex()
|
|
|
|
if ctx.withIndent {
|
|
structEndCode.op = opStructEndIndent
|
|
}
|
|
|
|
if prevField != nil && prevField.nextField == nil {
|
|
prevField.nextField = structEndCode
|
|
}
|
|
|
|
head.end = structEndCode
|
|
code.next = structEndCode
|
|
|
|
e.optimizeConflictAnonymousFields(anonymousFields)
|
|
e.optimizeAnonymousFields(head)
|
|
|
|
ret := (*opcode)(unsafe.Pointer(head))
|
|
compiled.code = ret
|
|
|
|
if ctx.withIndent {
|
|
delete(e.structTypeToCompiledIndentCode, typeptr)
|
|
} else {
|
|
delete(e.structTypeToCompiledCode, typeptr)
|
|
}
|
|
|
|
return ret, nil
|
|
}
|