1 package int64support
2
3 import (
4 "bytes"
5 "encoding/json"
6 "fmt"
7 "strconv"
8 )
9
10 var (
11 _ = json.Marshaler(new(Object))
12 _ = json.Unmarshaler(new(Object))
13 )
14
15 func (o *Object) MarshalJSON() ([]byte, error) {
16 if o.OptionalNumber == nil {
17 return ([]byte)("{}"), nil
18 }
19 return ([]byte)(fmt.Sprintf("{\"optional_number\": %d}", *o.OptionalNumber)), nil
20 }
21
22 func (o *Object) UnmarshalJSON(b []byte) error {
23 var (
24 trim = func(v []byte) []byte { return bytes.Trim(v, " \n\r\t") }
25 strip = func(v []byte, first, last byte) ([]byte, error) {
26 x := len(v)
27 if x < 2 || v[0] != first || v[x-1] != last {
28 return nil, fmt.Errorf("failed to strip %q and %q from byte sequence", first, last)
29 }
30 return v[1 : x-1], nil
31 }
32 )
33 b, err := strip(trim(b), '{', '}')
34 if err != nil {
35 return err
36 }
37
38
39 for xf, f := range bytes.Split(b, ([]byte)(",")) {
40 parts := bytes.SplitN(f, ([]byte)(":"), 2)
41 if x := len(parts); x != 2 {
42 if xf == 0 && (x == 0 || (x == 1 && len(trim(parts[0])) == 0)) {
43 return nil
44 }
45 return fmt.Errorf("failed to parse field-value seperator char ':'")
46 }
47 fieldName, err := strip(trim(parts[0]), '"', '"')
48 if err != nil {
49 return err
50 }
51 if string(fieldName) != "optional_number" {
52 continue
53 }
54 fieldValue := trim(parts[1])
55 v, err := strconv.ParseInt(string(fieldValue), 10, 64)
56 if err != nil {
57 return err
58 }
59 o.OptionalNumber = &v
60 break
61 }
62 return nil
63 }
64
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