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- /*
- https://github.com/mailru/easyjson/blob/master/jlexer/bytestostr.go
- */
- package main
- import (
- "fmt"
- "reflect"
- "unsafe"
- )
- // bytesToStr сорздаёт строку, указывающую на слайс байт, чтобы избежать копирования.
- //
- // Warning: the string returned by the function should be used with care, as the whole input data
- // chunk may be either blocked from being freed by GC because of a single string or the buffer.Data
- // may be garbage-collected even when the string exists.
- func bytesToStr(data []byte) string {
- h := (*reflect.SliceHeader)(unsafe.Pointer(&data))
- fmt.Printf("type: %T, value: %+v\n", h, h)
- fmt.Printf("type: %T, value: %+v\n", h.Data, h.Data)
- shdr := reflect.StringHeader{Data: h.Data, Len: h.Len}
- fmt.Printf("type: %T, value: %+v\n", shdr, shdr)
- return *(*string)(unsafe.Pointer(&shdr))
- }
- func main() {
- data := []byte(`some test`)
- str := bytesToStr(data)
- // str := string(data)
- fmt.Printf("type: %T, value: %+v\n", str, str)
- }
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