github.com/clubpay/ronykit/kit@v0.14.4-0.20240515065620-d0dace45cbc7/utils/unsafe_go119.go (about)

     1  //go:build go1.19 || go1.18
     2  
     3  package utils
     4  
     5  import (
     6  	"unsafe"
     7  
     8  	"github.com/goccy/go-reflect"
     9  )
    10  
    11  // ByteToStr converts byte slice to a string without memory allocation.
    12  // Note it may break if string and/or slice header will change
    13  // in the future go versions.
    14  func ByteToStr(bts []byte) string {
    15  	bh := (*reflect.SliceHeader)(unsafe.Pointer(&bts))
    16  
    17  	var s string
    18  	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
    19  	sh.Data = bh.Data
    20  	sh.Len = bh.Len
    21  
    22  	return s
    23  }
    24  
    25  // B2S is alias for ByteToStr.
    26  func B2S(bts []byte) string {
    27  	return ByteToStr(bts)
    28  }
    29  
    30  // StrToByte converts string to a byte slice without memory allocation.
    31  // Note it may break if string and/or slice header will change
    32  // in the future go versions.
    33  func StrToByte(str string) (b []byte) {
    34  	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
    35  	sh := (*reflect.StringHeader)(unsafe.Pointer(&str))
    36  	bh.Data = sh.Data
    37  	bh.Len = sh.Len
    38  	bh.Cap = sh.Len
    39  
    40  	return b
    41  }
    42  
    43  // S2B is alias for StrToByte.
    44  func S2B(str string) []byte {
    45  	return StrToByte(str)
    46  }