seaweedfs/weed/query/sqltypes/unsafe.go

package sqltypes

import (
	"reflect"
	"unsafe"
)

// BytesToString casts slice to string without copy
func BytesToString(b []byte) (s string) {
	if len(b) == 0 {
		return ""
	}

	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
	sh := reflect.StringHeader{Data: bh.Data, Len: bh.Len}

	return *(*string)(unsafe.Pointer(&sh))
}

// StringToBytes casts string to slice without copy
func StringToBytes(s string) []byte {
	if len(s) == 0 {
		return []byte{}
	}

	sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
	bh := reflect.SliceHeader{Data: sh.Data, Len: sh.Len, Cap: sh.Len}

	return *(*[]byte)(unsafe.Pointer(&bh))
}