ntool-biz/zero/statusz/handler_test.go

package statusz

import (
	"encoding/json"
	"fmt"
	"git.noahlan.cn/noahlan/ntool-biz/core/nstatus"
	"reflect"
	"testing"
	"unsafe"
)

type Dat struct {
	Nickname string `json:"nickname"`
}

func TestA(t *testing.T) {
	type A struct {
		Code int64  `json:"code"` // 8
		Msg  string `json:"msg"`  // 16
		Data any    `json:"data"`
	}

	type Response struct {
		A
		Data Dat
	}

	r := new(Response)
	r.Code = 123
	r.Msg = "222"
	r.Data = Dat{Nickname: "2333"}

	marshal, err := json.Marshal(r)
	if err != nil {
		return
	}
	fmt.Println(string(marshal))

	fmt.Println(r)
	fmt.Printf("r:%p code:%p data:%p\n", r, &r.Code, &r.Data)

	a := (*nstatus.Result)(unsafe.Pointer(r))

	trans(r)

	fmt.Println(a)
	fmt.Printf("a:%p code:%p data:%p\n", a, &a.Code, &a.Data)
}

func trans(resp any) {
	fmt.Println()

	type ApiResult struct {
		Code int64  `json:"code"` // 8
		Msg  string `json:"msg"`  // 16
		Data any    `json:"data"`
	}
	//ptr :=
	//u := (*[2]uintptr)(unsafe.Pointer(&resp))[1]

	u := (*ApiResult)(reflect.ValueOf(resp).UnsafePointer())

	dataPtr := unsafe.Add(reflect.ValueOf(resp).UnsafePointer(), 40)
	fmt.Println(dataPtr)

	u.Data = unsafe.Alignof(dataPtr)

	fmt.Println(u)
	fmt.Printf("u:%p code:%p data:%p\n", u, &u.Code, &u.Data)

	fmt.Println()
}