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update util_unsafe.go to use simpler, yet still safe, cast

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Johannes Lauinger 2020-06-03 15:45:44 +02:00 committed by GitHub
parent 813d953eeb
commit 2141537561
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1 changed files with 3 additions and 6 deletions
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9
util/util_unsafe.go
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@ -4,7 +4,6 @@ package util
import ( import (
"reflect" "reflect"
"runtime"
"unsafe" "unsafe"
) )
@ -14,13 +13,11 @@ func BytesToReadOnlyString(b []byte) string {
} }
// StringToReadOnlyBytes returns bytes converted from given string. // StringToReadOnlyBytes returns bytes converted from given string.
func StringToReadOnlyBytes(s string) []byte { func StringToReadOnlyBytes(s string) (bs []byte) {
b := make([]byte, 0)
sh := (*reflect.StringHeader)(unsafe.Pointer(&s)) sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
bh := (*reflect.SliceHeader)(unsafe.Pointer(&b)) bh := (*reflect.SliceHeader)(unsafe.Pointer(&bs))
bh.Data = sh.Data bh.Data = sh.Data
bh.Cap = sh.Len bh.Cap = sh.Len
bh.Len = sh.Len bh.Len = sh.Len
runtime.KeepAlive(s) return
return b
} }