mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-25 18:01:34 +00:00
211 lines
5.2 KiB
Go
211 lines
5.2 KiB
Go
package jsoniter
|
|
|
|
import (
|
|
"io"
|
|
)
|
|
|
|
// stream is a io.Writer like object, with JSON specific write functions.
|
|
// Error is not returned as return value, but stored as Error member on this stream instance.
|
|
type Stream struct {
|
|
cfg *frozenConfig
|
|
out io.Writer
|
|
buf []byte
|
|
Error error
|
|
indention int
|
|
Attachment interface{} // open for customized encoder
|
|
}
|
|
|
|
// NewStream create new stream instance.
|
|
// cfg can be jsoniter.ConfigDefault.
|
|
// out can be nil if write to internal buffer.
|
|
// bufSize is the initial size for the internal buffer in bytes.
|
|
func NewStream(cfg API, out io.Writer, bufSize int) *Stream {
|
|
return &Stream{
|
|
cfg: cfg.(*frozenConfig),
|
|
out: out,
|
|
buf: make([]byte, 0, bufSize),
|
|
Error: nil,
|
|
indention: 0,
|
|
}
|
|
}
|
|
|
|
// Pool returns a pool can provide more stream with same configuration
|
|
func (stream *Stream) Pool() StreamPool {
|
|
return stream.cfg
|
|
}
|
|
|
|
// Reset reuse this stream instance by assign a new writer
|
|
func (stream *Stream) Reset(out io.Writer) {
|
|
stream.out = out
|
|
stream.buf = stream.buf[:0]
|
|
}
|
|
|
|
// Available returns how many bytes are unused in the buffer.
|
|
func (stream *Stream) Available() int {
|
|
return cap(stream.buf) - len(stream.buf)
|
|
}
|
|
|
|
// Buffered returns the number of bytes that have been written into the current buffer.
|
|
func (stream *Stream) Buffered() int {
|
|
return len(stream.buf)
|
|
}
|
|
|
|
// Buffer if writer is nil, use this method to take the result
|
|
func (stream *Stream) Buffer() []byte {
|
|
return stream.buf
|
|
}
|
|
|
|
// SetBuffer allows to append to the internal buffer directly
|
|
func (stream *Stream) SetBuffer(buf []byte) {
|
|
stream.buf = buf
|
|
}
|
|
|
|
// Write writes the contents of p into the buffer.
|
|
// It returns the number of bytes written.
|
|
// If nn < len(p), it also returns an error explaining
|
|
// why the write is short.
|
|
func (stream *Stream) Write(p []byte) (nn int, err error) {
|
|
stream.buf = append(stream.buf, p...)
|
|
if stream.out != nil {
|
|
nn, err = stream.out.Write(stream.buf)
|
|
stream.buf = stream.buf[nn:]
|
|
return
|
|
}
|
|
return len(p), nil
|
|
}
|
|
|
|
// WriteByte writes a single byte.
|
|
func (stream *Stream) writeByte(c byte) {
|
|
stream.buf = append(stream.buf, c)
|
|
}
|
|
|
|
func (stream *Stream) writeTwoBytes(c1 byte, c2 byte) {
|
|
stream.buf = append(stream.buf, c1, c2)
|
|
}
|
|
|
|
func (stream *Stream) writeThreeBytes(c1 byte, c2 byte, c3 byte) {
|
|
stream.buf = append(stream.buf, c1, c2, c3)
|
|
}
|
|
|
|
func (stream *Stream) writeFourBytes(c1 byte, c2 byte, c3 byte, c4 byte) {
|
|
stream.buf = append(stream.buf, c1, c2, c3, c4)
|
|
}
|
|
|
|
func (stream *Stream) writeFiveBytes(c1 byte, c2 byte, c3 byte, c4 byte, c5 byte) {
|
|
stream.buf = append(stream.buf, c1, c2, c3, c4, c5)
|
|
}
|
|
|
|
// Flush writes any buffered data to the underlying io.Writer.
|
|
func (stream *Stream) Flush() error {
|
|
if stream.out == nil {
|
|
return nil
|
|
}
|
|
if stream.Error != nil {
|
|
return stream.Error
|
|
}
|
|
_, err := stream.out.Write(stream.buf)
|
|
if err != nil {
|
|
if stream.Error == nil {
|
|
stream.Error = err
|
|
}
|
|
return err
|
|
}
|
|
stream.buf = stream.buf[:0]
|
|
return nil
|
|
}
|
|
|
|
// WriteRaw write string out without quotes, just like []byte
|
|
func (stream *Stream) WriteRaw(s string) {
|
|
stream.buf = append(stream.buf, s...)
|
|
}
|
|
|
|
// WriteNil write null to stream
|
|
func (stream *Stream) WriteNil() {
|
|
stream.writeFourBytes('n', 'u', 'l', 'l')
|
|
}
|
|
|
|
// WriteTrue write true to stream
|
|
func (stream *Stream) WriteTrue() {
|
|
stream.writeFourBytes('t', 'r', 'u', 'e')
|
|
}
|
|
|
|
// WriteFalse write false to stream
|
|
func (stream *Stream) WriteFalse() {
|
|
stream.writeFiveBytes('f', 'a', 'l', 's', 'e')
|
|
}
|
|
|
|
// WriteBool write true or false into stream
|
|
func (stream *Stream) WriteBool(val bool) {
|
|
if val {
|
|
stream.WriteTrue()
|
|
} else {
|
|
stream.WriteFalse()
|
|
}
|
|
}
|
|
|
|
// WriteObjectStart write { with possible indention
|
|
func (stream *Stream) WriteObjectStart() {
|
|
stream.indention += stream.cfg.indentionStep
|
|
stream.writeByte('{')
|
|
stream.writeIndention(0)
|
|
}
|
|
|
|
// WriteObjectField write "field": with possible indention
|
|
func (stream *Stream) WriteObjectField(field string) {
|
|
stream.WriteString(field)
|
|
if stream.indention > 0 {
|
|
stream.writeTwoBytes(':', ' ')
|
|
} else {
|
|
stream.writeByte(':')
|
|
}
|
|
}
|
|
|
|
// WriteObjectEnd write } with possible indention
|
|
func (stream *Stream) WriteObjectEnd() {
|
|
stream.writeIndention(stream.cfg.indentionStep)
|
|
stream.indention -= stream.cfg.indentionStep
|
|
stream.writeByte('}')
|
|
}
|
|
|
|
// WriteEmptyObject write {}
|
|
func (stream *Stream) WriteEmptyObject() {
|
|
stream.writeByte('{')
|
|
stream.writeByte('}')
|
|
}
|
|
|
|
// WriteMore write , with possible indention
|
|
func (stream *Stream) WriteMore() {
|
|
stream.writeByte(',')
|
|
stream.writeIndention(0)
|
|
}
|
|
|
|
// WriteArrayStart write [ with possible indention
|
|
func (stream *Stream) WriteArrayStart() {
|
|
stream.indention += stream.cfg.indentionStep
|
|
stream.writeByte('[')
|
|
stream.writeIndention(0)
|
|
}
|
|
|
|
// WriteEmptyArray write []
|
|
func (stream *Stream) WriteEmptyArray() {
|
|
stream.writeTwoBytes('[', ']')
|
|
}
|
|
|
|
// WriteArrayEnd write ] with possible indention
|
|
func (stream *Stream) WriteArrayEnd() {
|
|
stream.writeIndention(stream.cfg.indentionStep)
|
|
stream.indention -= stream.cfg.indentionStep
|
|
stream.writeByte(']')
|
|
}
|
|
|
|
func (stream *Stream) writeIndention(delta int) {
|
|
if stream.indention == 0 {
|
|
return
|
|
}
|
|
stream.writeByte('\n')
|
|
toWrite := stream.indention - delta
|
|
for i := 0; i < toWrite; i++ {
|
|
stream.buf = append(stream.buf, ' ')
|
|
}
|
|
}
|