!-Marshal encode writes to buf an S-expression representation of v. !+encode
(buf *bytes.Buffer, v reflect.Value)
| 26 | // encode writes to buf an S-expression representation of v. |
| 27 | //!+encode |
| 28 | func encode(buf *bytes.Buffer, v reflect.Value) error { |
| 29 | switch v.Kind() { |
| 30 | case reflect.Invalid: |
| 31 | buf.WriteString("nil") |
| 32 | |
| 33 | case reflect.Int, reflect.Int8, reflect.Int16, |
| 34 | reflect.Int32, reflect.Int64: |
| 35 | fmt.Fprintf(buf, "%d", v.Int()) |
| 36 | |
| 37 | case reflect.Uint, reflect.Uint8, reflect.Uint16, |
| 38 | reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 39 | fmt.Fprintf(buf, "%d", v.Uint()) |
| 40 | |
| 41 | case reflect.String: |
| 42 | fmt.Fprintf(buf, "%q", v.String()) |
| 43 | |
| 44 | case reflect.Ptr: |
| 45 | return encode(buf, v.Elem()) |
| 46 | |
| 47 | case reflect.Array, reflect.Slice: // (value ...) |
| 48 | buf.WriteByte('(') |
| 49 | for i := 0; i < v.Len(); i++ { |
| 50 | if i > 0 { |
| 51 | buf.WriteByte(' ') |
| 52 | } |
| 53 | if err := encode(buf, v.Index(i)); err != nil { |
| 54 | return err |
| 55 | } |
| 56 | } |
| 57 | buf.WriteByte(')') |
| 58 | |
| 59 | case reflect.Struct: // ((name value) ...) |
| 60 | buf.WriteByte('(') |
| 61 | for i := 0; i < v.NumField(); i++ { |
| 62 | if i > 0 { |
| 63 | buf.WriteByte(' ') |
| 64 | } |
| 65 | fmt.Fprintf(buf, "(%s ", v.Type().Field(i).Name) |
| 66 | if err := encode(buf, v.Field(i)); err != nil { |
| 67 | return err |
| 68 | } |
| 69 | buf.WriteByte(')') |
| 70 | } |
| 71 | buf.WriteByte(')') |
| 72 | |
| 73 | case reflect.Map: // ((key value) ...) |
| 74 | buf.WriteByte('(') |
| 75 | for i, key := range v.MapKeys() { |
| 76 | if i > 0 { |
| 77 | buf.WriteByte(' ') |
| 78 | } |
| 79 | buf.WriteByte('(') |
| 80 | if err := encode(buf, key); err != nil { |
| 81 | return err |
| 82 | } |
| 83 | buf.WriteByte(' ') |
| 84 | if err := encode(buf, v.MapIndex(key)); err != nil { |
| 85 | return err |