github.com/modern-go/refLect2@v1.0.1/unsafe_field.go (about)

     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  }