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unsafe_field.go (2138B)

      1 package reflect2
      2 
      3 import (
      4 	"reflect"
      5 	"unsafe"
      6 )
      7 
      8 type UnsafeStructField struct {
      9 	reflect.StructField
     10 	structType *UnsafeStructType
     11 	rtype      unsafe.Pointer
     12 	ptrRType   unsafe.Pointer
     13 }
     14 
     15 func newUnsafeStructField(structType *UnsafeStructType, structField reflect.StructField) *UnsafeStructField {
     16 	return &UnsafeStructField{
     17 		StructField: structField,
     18 		rtype:       unpackEFace(structField.Type).data,
     19 		ptrRType:    unpackEFace(reflect.PtrTo(structField.Type)).data,
     20 		structType:  structType,
     21 	}
     22 }
     23 
     24 func (field *UnsafeStructField) Offset() uintptr {
     25 	return field.StructField.Offset
     26 }
     27 
     28 func (field *UnsafeStructField) Name() string {
     29 	return field.StructField.Name
     30 }
     31 
     32 func (field *UnsafeStructField) PkgPath() string {
     33 	return field.StructField.PkgPath
     34 }
     35 
     36 func (field *UnsafeStructField) Type() Type {
     37 	return field.structType.cfg.Type2(field.StructField.Type)
     38 }
     39 
     40 func (field *UnsafeStructField) Tag() reflect.StructTag {
     41 	return field.StructField.Tag
     42 }
     43 
     44 func (field *UnsafeStructField) Index() []int {
     45 	return field.StructField.Index
     46 }
     47 
     48 func (field *UnsafeStructField) Anonymous() bool {
     49 	return field.StructField.Anonymous
     50 }
     51 
     52 func (field *UnsafeStructField) Set(obj interface{}, value interface{}) {
     53 	objEFace := unpackEFace(obj)
     54 	assertType("StructField.SetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
     55 	valueEFace := unpackEFace(value)
     56 	assertType("StructField.SetIndex argument 2", field.ptrRType, valueEFace.rtype)
     57 	field.UnsafeSet(objEFace.data, valueEFace.data)
     58 }
     59 
     60 func (field *UnsafeStructField) UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer) {
     61 	fieldPtr := add(obj, field.StructField.Offset, "same as non-reflect &v.field")
     62 	typedmemmove(field.rtype, fieldPtr, value)
     63 }
     64 
     65 func (field *UnsafeStructField) Get(obj interface{}) interface{} {
     66 	objEFace := unpackEFace(obj)
     67 	assertType("StructField.GetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
     68 	value := field.UnsafeGet(objEFace.data)
     69 	return packEFace(field.ptrRType, value)
     70 }
     71 
     72 func (field *UnsafeStructField) UnsafeGet(obj unsafe.Pointer) unsafe.Pointer {
     73 	return add(obj, field.StructField.Offset, "same as non-reflect &v.field")
     74 }