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.
55 lines
1.5 KiB
55 lines
1.5 KiB
var stream = require('readable-stream')
|
|
var inherits = require('inherits')
|
|
|
|
var SIGNAL_FLUSH =(Buffer.from && Buffer.from !== Uint8Array.from)
|
|
? Buffer.from([0])
|
|
: new Buffer([0])
|
|
|
|
module.exports = WriteStream
|
|
|
|
function WriteStream (opts, write, flush) {
|
|
if (!(this instanceof WriteStream)) return new WriteStream(opts, write, flush)
|
|
|
|
if (typeof opts === 'function') {
|
|
flush = write
|
|
write = opts
|
|
opts = {}
|
|
}
|
|
|
|
stream.Writable.call(this, opts)
|
|
|
|
this.destroyed = false
|
|
this._worker = write || null
|
|
this._flush = flush || null
|
|
}
|
|
|
|
inherits(WriteStream, stream.Writable)
|
|
|
|
WriteStream.obj = function (opts, worker, flush) {
|
|
if (typeof opts === 'function') return WriteStream.obj(null, opts, worker)
|
|
if (!opts) opts = {}
|
|
opts.objectMode = true
|
|
return new WriteStream(opts, worker, flush)
|
|
}
|
|
|
|
WriteStream.prototype._write = function (data, enc, cb) {
|
|
if (SIGNAL_FLUSH === data) this._flush(cb)
|
|
else this._worker(data, enc, cb)
|
|
}
|
|
|
|
WriteStream.prototype.end = function (data, enc, cb) {
|
|
if (!this._flush) return stream.Writable.prototype.end.apply(this, arguments)
|
|
if (typeof data === 'function') return this.end(null, null, data)
|
|
if (typeof enc === 'function') return this.end(data, null, enc)
|
|
if (data) this.write(data)
|
|
if (!this._writableState.ending) this.write(SIGNAL_FLUSH)
|
|
return stream.Writable.prototype.end.call(this, cb)
|
|
}
|
|
|
|
WriteStream.prototype.destroy = function (err) {
|
|
if (this.destroyed) return
|
|
this.destroyed = true
|
|
if (err) this.emit('error', err)
|
|
this.emit('close')
|
|
}
|