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string.go
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/
string.go
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package conv
import (
"reflect"
"unsafe"
)
// UnsafeStrToBytes uses unsafe to convert string into byte array. Returned bytes
// must not be altered after this function is called as it will cause a segmentation fault.
func UnsafeStrToBytes(s string) []byte {
var buf []byte
sHdr := (*reflect.StringHeader)(unsafe.Pointer(&s))
bufHdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
bufHdr.Data = sHdr.Data
bufHdr.Cap = sHdr.Len
bufHdr.Len = sHdr.Len
return buf
}
// UnsafeBytesToStr is meant to make a zero allocation conversion
// from []byte -> string to speed up operations, it is not meant
// to be used generally, but for a specific pattern to delete keys
// from a map.
func UnsafeBytesToStr(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}