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
41
42
43
44
45
46
47
48
49
50
51
52
|
package proto
import (
"reflect"
"unsafe"
)
func pointerCodecOf(t reflect.Type, seen map[reflect.Type]*codec) *codec {
p := new(codec)
seen[t] = p
c := codecOf(t.Elem(), seen)
p.wire = c.wire
p.size = pointerSizeFuncOf(t, c)
p.encode = pointerEncodeFuncOf(t, c)
p.decode = pointerDecodeFuncOf(t, c)
return p
}
func pointerSizeFuncOf(t reflect.Type, c *codec) sizeFunc {
return func(p unsafe.Pointer, flags flags) int {
if p != nil {
if !flags.has(inline) {
p = *(*unsafe.Pointer)(p)
}
return c.size(p, flags.without(inline).with(wantzero))
}
return 0
}
}
func pointerEncodeFuncOf(t reflect.Type, c *codec) encodeFunc {
return func(b []byte, p unsafe.Pointer, flags flags) (int, error) {
if p != nil {
if !flags.has(inline) {
p = *(*unsafe.Pointer)(p)
}
return c.encode(b, p, flags.without(inline).with(wantzero))
}
return 0, nil
}
}
func pointerDecodeFuncOf(t reflect.Type, c *codec) decodeFunc {
t = t.Elem()
return func(b []byte, p unsafe.Pointer, flags flags) (int, error) {
v := (*unsafe.Pointer)(p)
if *v == nil {
*v = unsafe.Pointer(reflect.New(t).Pointer())
}
return c.decode(b, *v, flags)
}
}
|
