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obj.go
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obj.go
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package reflector
import (
"fmt"
"unsafe"
"github.com/clubpay/ronykit"
"github.com/goccy/go-reflect"
)
var (
registered = map[reflect.Type]*Reflected{}
errInvalidFieldType = func(s string) error { return fmt.Errorf("the field type does not match: %s", s) }
)
// emptyInterface is the header for an interface{} value.
type emptyInterface struct {
_ uint64
word unsafe.Pointer
}
type FieldInfo struct {
idx int
f reflect.StructField
name string
offset uintptr
typ reflect.Type
unsafe bool
}
func (f FieldInfo) Kind() reflect.Kind {
if f.typ == nil {
return reflect.Invalid
}
return f.typ.Kind()
}
func (f FieldInfo) Type() reflect.StructField {
return f.f
}
type Fields map[string]FieldInfo
func (fields Fields) Get(m ronykit.Message, fieldName string) interface{} {
fi := fields[fieldName]
mVal := reflect.Indirect(reflect.ValueOf(m)).Field(fi.idx)
switch fi.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return mVal.Int()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return mVal.Uint()
case reflect.String:
return mVal.String()
case reflect.Float64, reflect.Float32:
return mVal.Float()
case reflect.Bool:
return mVal.Bool()
}
if !mVal.CanInterface() {
return nil
}
return mVal
}
func (fields Fields) GetInt(m ronykit.Message, fieldName string) (int, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Int {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*int)(ptr), nil
}
func (fields Fields) GetIntDefault(m ronykit.Message, fieldName string, def int) int {
v, err := fields.GetInt(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetUInt(m ronykit.Message, fieldName string) (uint, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Uint {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*uint)(ptr), nil
}
func (fields Fields) GetUIntDefault(m ronykit.Message, fieldName string, def uint) uint {
v, err := fields.GetUInt(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetInt64(m ronykit.Message, fieldName string) (int64, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Int64 {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*int64)(ptr), nil
}
func (fields Fields) GetInt64Default(m ronykit.Message, fieldName string, def int64) int64 {
v, err := fields.GetInt64(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetUInt64(m ronykit.Message, fieldName string) (uint64, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Uint64 {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*uint64)(ptr), nil
}
func (fields Fields) GetUInt64Default(m ronykit.Message, fieldName string, def uint64) uint64 {
v, err := fields.GetUInt64(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetInt32(m ronykit.Message, fieldName string) (int32, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Int32 {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*int32)(ptr), nil
}
func (fields Fields) GetInt32Default(m ronykit.Message, fieldName string, def int32) int32 {
v, err := fields.GetInt32(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetUInt32(m ronykit.Message, fieldName string) (uint32, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.Uint32 {
return 0, errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*uint32)(ptr), nil
}
func (fields Fields) GetUInt32Default(m ronykit.Message, fieldName string, def uint32) uint32 {
v, err := fields.GetUInt32(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) GetString(m ronykit.Message, fieldName string) (string, error) {
fi := fields[fieldName]
if k := fi.Kind(); k != reflect.String {
return "", errInvalidFieldType(k.String())
}
ptr := unsafe.Add((*emptyInterface)(unsafe.Pointer(&m)).word, fi.offset)
return *(*string)(ptr), nil
}
func (fields Fields) GetStringDefault(m ronykit.Message, fieldName string, def string) string {
v, err := fields.GetString(m, fieldName)
if err != nil {
return def
}
return v
}
func (fields Fields) WalkFields(cb func(key string, f FieldInfo)) {
for k, f := range fields {
cb(k, f)
}
}
type Reflected struct {
obj Fields
byTag map[string]Fields
typ reflect.Type
}
func (r Reflected) ByTag(t string) (Fields, bool) {
f, ok := r.byTag[t]
return f, ok
}
func (r Reflected) Obj() Fields {
return r.obj
}
func (r Reflected) Type() reflect.Type {
return r.typ
}