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encode.go
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encode.go
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/*
Copyright (C) 2016 Andreas T Jonsson
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package sjson
import (
"errors"
"fmt"
"io"
"strconv"
)
//Value represents a SJSON value.
type Value interface{}
//Encode encodes a SJSON value to the writer.
func Encode(writer io.Writer, v Value) error {
return encodeValue(writer, v)
}
func encodeValue(writer io.Writer, v Value) error {
var err error
switch v.(type) {
case nil:
_, err = fmt.Fprint(writer, "null")
case int, int8, int16, int32, int64,
uint8, uint16, uint32, uint64,
float32, float64, bool:
_, err = fmt.Fprintf(writer, "%v", v)
case string:
_, err = fmt.Fprint(writer, strconv.Quote(v.(string)))
case []Value:
if _, err = fmt.Fprint(writer, "["); err != nil {
return err
}
for i, val := range v.([]Value) {
if i > 0 {
if _, err = fmt.Fprint(writer, ","); err != nil {
return err
}
}
if err := encodeValue(writer, val); err != nil {
return err
}
}
_, err = fmt.Fprint(writer, "]")
case map[string]Value:
if _, err = fmt.Fprint(writer, "{"); err != nil {
return err
}
i := 0
for k, val := range v.(map[string]Value) {
if i > 0 {
if _, err = fmt.Fprint(writer, ","); err != nil {
return err
}
}
if _, err = fmt.Fprintf(writer, "\"%v\"=", k); err != nil {
return err
}
if err := encodeValue(writer, val); err != nil {
return err
}
i++
}
_, err = fmt.Fprint(writer, "}")
default:
return errors.New("invalid type")
}
return err
}