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Diffstat (limited to 'src/pkg/encoding/json/stream.go')
-rw-r--r--src/pkg/encoding/json/stream.go200
1 files changed, 0 insertions, 200 deletions
diff --git a/src/pkg/encoding/json/stream.go b/src/pkg/encoding/json/stream.go
deleted file mode 100644
index 9566ecadc..000000000
--- a/src/pkg/encoding/json/stream.go
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package json
-
-import (
- "bytes"
- "errors"
- "io"
-)
-
-// A Decoder reads and decodes JSON objects from an input stream.
-type Decoder struct {
- r io.Reader
- buf []byte
- d decodeState
- scan scanner
- err error
-}
-
-// NewDecoder returns a new decoder that reads from r.
-//
-// The decoder introduces its own buffering and may
-// read data from r beyond the JSON values requested.
-func NewDecoder(r io.Reader) *Decoder {
- return &Decoder{r: r}
-}
-
-// UseNumber causes the Decoder to unmarshal a number into an interface{} as a
-// Number instead of as a float64.
-func (dec *Decoder) UseNumber() { dec.d.useNumber = true }
-
-// Decode reads the next JSON-encoded value from its
-// input and stores it in the value pointed to by v.
-//
-// See the documentation for Unmarshal for details about
-// the conversion of JSON into a Go value.
-func (dec *Decoder) Decode(v interface{}) error {
- if dec.err != nil {
- return dec.err
- }
-
- n, err := dec.readValue()
- if err != nil {
- return err
- }
-
- // Don't save err from unmarshal into dec.err:
- // the connection is still usable since we read a complete JSON
- // object from it before the error happened.
- dec.d.init(dec.buf[0:n])
- err = dec.d.unmarshal(v)
-
- // Slide rest of data down.
- rest := copy(dec.buf, dec.buf[n:])
- dec.buf = dec.buf[0:rest]
-
- return err
-}
-
-// Buffered returns a reader of the data remaining in the Decoder's
-// buffer. The reader is valid until the next call to Decode.
-func (dec *Decoder) Buffered() io.Reader {
- return bytes.NewReader(dec.buf)
-}
-
-// readValue reads a JSON value into dec.buf.
-// It returns the length of the encoding.
-func (dec *Decoder) readValue() (int, error) {
- dec.scan.reset()
-
- scanp := 0
- var err error
-Input:
- for {
- // Look in the buffer for a new value.
- for i, c := range dec.buf[scanp:] {
- dec.scan.bytes++
- v := dec.scan.step(&dec.scan, int(c))
- if v == scanEnd {
- scanp += i
- break Input
- }
- // scanEnd is delayed one byte.
- // We might block trying to get that byte from src,
- // so instead invent a space byte.
- if (v == scanEndObject || v == scanEndArray) && dec.scan.step(&dec.scan, ' ') == scanEnd {
- scanp += i + 1
- break Input
- }
- if v == scanError {
- dec.err = dec.scan.err
- return 0, dec.scan.err
- }
- }
- scanp = len(dec.buf)
-
- // Did the last read have an error?
- // Delayed until now to allow buffer scan.
- if err != nil {
- if err == io.EOF {
- if dec.scan.step(&dec.scan, ' ') == scanEnd {
- break Input
- }
- if nonSpace(dec.buf) {
- err = io.ErrUnexpectedEOF
- }
- }
- dec.err = err
- return 0, err
- }
-
- // Make room to read more into the buffer.
- const minRead = 512
- if cap(dec.buf)-len(dec.buf) < minRead {
- newBuf := make([]byte, len(dec.buf), 2*cap(dec.buf)+minRead)
- copy(newBuf, dec.buf)
- dec.buf = newBuf
- }
-
- // Read. Delay error for next iteration (after scan).
- var n int
- n, err = dec.r.Read(dec.buf[len(dec.buf):cap(dec.buf)])
- dec.buf = dec.buf[0 : len(dec.buf)+n]
- }
- return scanp, nil
-}
-
-func nonSpace(b []byte) bool {
- for _, c := range b {
- if !isSpace(rune(c)) {
- return true
- }
- }
- return false
-}
-
-// An Encoder writes JSON objects to an output stream.
-type Encoder struct {
- w io.Writer
- err error
-}
-
-// NewEncoder returns a new encoder that writes to w.
-func NewEncoder(w io.Writer) *Encoder {
- return &Encoder{w: w}
-}
-
-// Encode writes the JSON encoding of v to the stream,
-// followed by a newline character.
-//
-// See the documentation for Marshal for details about the
-// conversion of Go values to JSON.
-func (enc *Encoder) Encode(v interface{}) error {
- if enc.err != nil {
- return enc.err
- }
- e := newEncodeState()
- err := e.marshal(v)
- if err != nil {
- return err
- }
-
- // Terminate each value with a newline.
- // This makes the output look a little nicer
- // when debugging, and some kind of space
- // is required if the encoded value was a number,
- // so that the reader knows there aren't more
- // digits coming.
- e.WriteByte('\n')
-
- if _, err = enc.w.Write(e.Bytes()); err != nil {
- enc.err = err
- }
- encodeStatePool.Put(e)
- return err
-}
-
-// RawMessage is a raw encoded JSON object.
-// It implements Marshaler and Unmarshaler and can
-// be used to delay JSON decoding or precompute a JSON encoding.
-type RawMessage []byte
-
-// MarshalJSON returns *m as the JSON encoding of m.
-func (m *RawMessage) MarshalJSON() ([]byte, error) {
- return *m, nil
-}
-
-// UnmarshalJSON sets *m to a copy of data.
-func (m *RawMessage) UnmarshalJSON(data []byte) error {
- if m == nil {
- return errors.New("json.RawMessage: UnmarshalJSON on nil pointer")
- }
- *m = append((*m)[0:0], data...)
- return nil
-}
-
-var _ Marshaler = (*RawMessage)(nil)
-var _ Unmarshaler = (*RawMessage)(nil)