You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.1 KiB
84 lines
2.1 KiB
/*
|
|
* Copyright 2021 ByteDance Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package encoder
|
|
|
|
import (
|
|
`encoding/json`
|
|
`io`
|
|
)
|
|
|
|
// StreamEncoder uses io.Writer as input.
|
|
type StreamEncoder struct {
|
|
w io.Writer
|
|
Encoder
|
|
}
|
|
|
|
// NewStreamEncoder adapts to encoding/json.NewDecoder API.
|
|
//
|
|
// NewStreamEncoder returns a new encoder that write to w.
|
|
func NewStreamEncoder(w io.Writer) *StreamEncoder {
|
|
return &StreamEncoder{w: w}
|
|
}
|
|
|
|
// Encode encodes interface{} as JSON to io.Writer
|
|
func (enc *StreamEncoder) Encode(val interface{}) (err error) {
|
|
out := newBytes()
|
|
|
|
/* encode into the buffer */
|
|
err = EncodeInto(&out, val, enc.Opts)
|
|
if err != nil {
|
|
goto free_bytes
|
|
}
|
|
|
|
if enc.indent != "" || enc.prefix != "" {
|
|
/* indent the JSON */
|
|
buf := newBuffer()
|
|
err = json.Indent(buf, out, enc.prefix, enc.indent)
|
|
if err != nil {
|
|
freeBuffer(buf)
|
|
goto free_bytes
|
|
}
|
|
|
|
// according to standard library, terminate each value with a newline...
|
|
buf.WriteByte('\n')
|
|
|
|
/* copy into io.Writer */
|
|
_, err = io.Copy(enc.w, buf)
|
|
if err != nil {
|
|
freeBuffer(buf)
|
|
goto free_bytes
|
|
}
|
|
|
|
} else {
|
|
/* copy into io.Writer */
|
|
var n int
|
|
for len(out) > 0 {
|
|
n, err = enc.w.Write(out)
|
|
out = out[n:]
|
|
if err != nil {
|
|
goto free_bytes
|
|
}
|
|
}
|
|
|
|
// according to standard library, terminate each value with a newline...
|
|
enc.w.Write([]byte{'\n'})
|
|
}
|
|
|
|
free_bytes:
|
|
freeBytes(out)
|
|
return err
|
|
} |