forked from glycerine/sshego
-
Notifications
You must be signed in to change notification settings - Fork 0
/
unsafe.go
40 lines (34 loc) · 994 Bytes
/
unsafe.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
// +build !appengine
package msgp
import (
"reflect"
"unsafe"
)
// NOTE:
// all of the definition in this file
// should be repeated in appengine.go,
// but without using unsafe
const (
// spec says int and uint are always
// the same size, but that int/uint
// size may not be machine word size
smallint = unsafe.Sizeof(int(0)) == 4
)
// UnsafeString returns the byte slice as a volatile string
// THIS SHOULD ONLY BE USED BY THE CODE GENERATOR.
// THIS IS EVIL CODE.
// YOU HAVE BEEN WARNED.
func UnsafeString(b []byte) string {
return *(*string)(unsafe.Pointer(&reflect.StringHeader{Data: uintptr(unsafe.Pointer(&b[0])), Len: len(b)}))
}
// UnsafeBytes returns the string as a byte slice
// THIS SHOULD ONLY BE USED BY THE CODE GENERATOR.
// THIS IS EVIL CODE.
// YOU HAVE BEEN WARNED.
func UnsafeBytes(s string) []byte {
return *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
Len: len(s),
Cap: len(s),
Data: (*(*reflect.StringHeader)(unsafe.Pointer(&s))).Data,
}))
}