我正在尝试使用unsafe库在 Go 中将uint32转换为字节数组(4 个字节):h := (uint32)(((fh.year*100+fh.month)*100+fh.day)*100 + fh.h)a := make([]byte, unsafe.Sizeof(h))copy(a, *(*[]byte)(unsafe.Pointer(&h)))前两行是正确的,但随后在复制调用中出现运行时错误(意外故障地址)。下一...
memmove(unsafe.Pointer(&to[0]), stringStructOf(&fm).str, uintptr(n)) return n } copy 实现过程图解如下 string([]byte)的实现(源码也在src/runtime/string.go中) // Buf is a fixed-size buffer for the result, // it is not nil if the result does not escape. func slicebytetostring(bu...
stop chan error}// Serve implements EventLoop.func(evl*eventLoop)Serve(ln net.Listener)error{npln,err:=ConvertListener(ln)iferr!=nil{returnerr}evl.Lock()evl.svr=newServer(npln,evl.opts,evl.quit)// 开启所有的epoll,然后异步协程阻塞等待evl.svr.Run()evl.Unlock()// 阻塞住err=evl.waitQuit...
FormatUint() 代码语言:javascript 代码运行次数:0 运行 AI代码解释 func FormatUint(i uint64, base int) string 是FormatInt的无符号整型版本。 FormatFloat() 代码语言:javascript 代码运行次数:0 运行 AI代码解释 func FormatFloat(f float64, fmt byte, prec, bitSize int) string 函数将浮点数表示为字...
将c语言的 char * 指针copy成 golang 的byte slice: //convert c language char* to golang byte slice, and COPY source datas into dest slicepacket *C.char//该变量在c语言里赋值vlen :=512b :=make([]byte, vlen) ii := C.int(0)fori :=0; i < vlen; i++{ ...
funcTestConvertPointerToSlice(t*testing.T){data:=[]int{1,2,3}varpointerStore[1]uintptrpointerStore[0]=uintptr(unsafe.Pointer(&data))// data pointer to pointerStore[0]// get data header pointervardataHeader=unsafe.Pointer(&pointerStore[0])nums1:=unsafe.Pointer(uintptr(dataHeader)+uintptr...
()varmainWin=asnimalApp.NewWindow("Aminal Sound")varplayBtn=make(map[string]*widget.Button)varplayerMap=make(map[string]*audioPanel)varIsPlaying=make(map[string]bool)funcinit() {err:=json.Unmarshal([]byte(jsonfile),&AudioDataMain)iferr!=nil{log.Fatalln("unable to unmarshal json "+err....
func ConvertShiftJISToUTF8(s string) (string, error) { decoder := japanese.ShiftJIS.NewDecoder() result, err := decoder.String(s) if err != nil { return "", err } return result, nil } 如何避免字符串被修改? 由于字符串类型是不可变的,因此如果我们需要在函数内部修改一个字符串对象,则需...
(Most TypeNames for which IsAlias() is true have a Type() of type *types.Alias, but IsAlias() is also true for the predeclared byte and rune types, which are aliases for uint8 and int32.) (*PkgName).Imported returns the package (for instance, encoding/json) denoted by a given ...
主要是对unsafe.Pointer uintptr的一个应用实例,顺便了解golang的string与slice底层是怎样实现的 Str2bytes:方法代码解释