diff options
Diffstat (limited to 'deps/npm/node_modules/minizlib/node_modules/minipass/index.js')
| -rw-r--r-- | deps/npm/node_modules/minizlib/node_modules/minipass/index.js | 537 |
1 files changed, 0 insertions, 537 deletions
diff --git a/deps/npm/node_modules/minizlib/node_modules/minipass/index.js b/deps/npm/node_modules/minizlib/node_modules/minipass/index.js deleted file mode 100644 index c072352d44..0000000000 --- a/deps/npm/node_modules/minizlib/node_modules/minipass/index.js +++ /dev/null @@ -1,537 +0,0 @@ -'use strict' -const EE = require('events') -const Yallist = require('yallist') -const SD = require('string_decoder').StringDecoder - -const EOF = Symbol('EOF') -const MAYBE_EMIT_END = Symbol('maybeEmitEnd') -const EMITTED_END = Symbol('emittedEnd') -const EMITTING_END = Symbol('emittingEnd') -const CLOSED = Symbol('closed') -const READ = Symbol('read') -const FLUSH = Symbol('flush') -const FLUSHCHUNK = Symbol('flushChunk') -const ENCODING = Symbol('encoding') -const DECODER = Symbol('decoder') -const FLOWING = Symbol('flowing') -const PAUSED = Symbol('paused') -const RESUME = Symbol('resume') -const BUFFERLENGTH = Symbol('bufferLength') -const BUFFERPUSH = Symbol('bufferPush') -const BUFFERSHIFT = Symbol('bufferShift') -const OBJECTMODE = Symbol('objectMode') -const DESTROYED = Symbol('destroyed') - -// TODO remove when Node v8 support drops -const doIter = global._MP_NO_ITERATOR_SYMBOLS_ !== '1' -const ASYNCITERATOR = doIter && Symbol.asyncIterator - || Symbol('asyncIterator not implemented') -const ITERATOR = doIter && Symbol.iterator - || Symbol('iterator not implemented') - -// Buffer in node 4.x < 4.5.0 doesn't have working Buffer.from -// or Buffer.alloc, and Buffer in node 10 deprecated the ctor. -// .M, this is fine .\^/M.. -const B = Buffer.alloc ? Buffer - : /* istanbul ignore next */ require('safe-buffer').Buffer - -// events that mean 'the stream is over' -// these are treated specially, and re-emitted -// if they are listened for after emitting. -const isEndish = ev => - ev === 'end' || - ev === 'finish' || - ev === 'prefinish' - -const isArrayBuffer = b => b instanceof ArrayBuffer || - typeof b === 'object' && - b.constructor && - b.constructor.name === 'ArrayBuffer' && - b.byteLength >= 0 - -const isArrayBufferView = b => !B.isBuffer(b) && ArrayBuffer.isView(b) - -module.exports = class Minipass extends EE { - constructor (options) { - super() - this[FLOWING] = false - // whether we're explicitly paused - this[PAUSED] = false - this.pipes = new Yallist() - this.buffer = new Yallist() - this[OBJECTMODE] = options && options.objectMode || false - if (this[OBJECTMODE]) - this[ENCODING] = null - else - this[ENCODING] = options && options.encoding || null - if (this[ENCODING] === 'buffer') - this[ENCODING] = null - this[DECODER] = this[ENCODING] ? new SD(this[ENCODING]) : null - this[EOF] = false - this[EMITTED_END] = false - this[EMITTING_END] = false - this[CLOSED] = false - this.writable = true - this.readable = true - this[BUFFERLENGTH] = 0 - this[DESTROYED] = false - } - - get bufferLength () { return this[BUFFERLENGTH] } - - get encoding () { return this[ENCODING] } - set encoding (enc) { - if (this[OBJECTMODE]) - throw new Error('cannot set encoding in objectMode') - - if (this[ENCODING] && enc !== this[ENCODING] && - (this[DECODER] && this[DECODER].lastNeed || this[BUFFERLENGTH])) - throw new Error('cannot change encoding') - - if (this[ENCODING] !== enc) { - this[DECODER] = enc ? new SD(enc) : null - if (this.buffer.length) - this.buffer = this.buffer.map(chunk => this[DECODER].write(chunk)) - } - - this[ENCODING] = enc - } - - setEncoding (enc) { - this.encoding = enc - } - - get objectMode () { return this[OBJECTMODE] } - set objectMode (ॐ ) { this[OBJECTMODE] = this[OBJECTMODE] || !!ॐ } - - write (chunk, encoding, cb) { - if (this[EOF]) - throw new Error('write after end') - - if (this[DESTROYED]) { - this.emit('error', Object.assign( - new Error('Cannot call write after a stream was destroyed'), - { code: 'ERR_STREAM_DESTROYED' } - )) - return true - } - - if (typeof encoding === 'function') - cb = encoding, encoding = 'utf8' - - if (!encoding) - encoding = 'utf8' - - // convert array buffers and typed array views into buffers - // at some point in the future, we may want to do the opposite! - // leave strings and buffers as-is - // anything else switches us into object mode - if (!this[OBJECTMODE] && !B.isBuffer(chunk)) { - if (isArrayBufferView(chunk)) - chunk = B.from(chunk.buffer, chunk.byteOffset, chunk.byteLength) - else if (isArrayBuffer(chunk)) - chunk = B.from(chunk) - else if (typeof chunk !== 'string') - // use the setter so we throw if we have encoding set - this.objectMode = true - } - - // this ensures at this point that the chunk is a buffer or string - // don't buffer it up or send it to the decoder - if (!this.objectMode && !chunk.length) { - const ret = this.flowing - if (this[BUFFERLENGTH] !== 0) - this.emit('readable') - if (cb) - cb() - return ret - } - - // fast-path writing strings of same encoding to a stream with - // an empty buffer, skipping the buffer/decoder dance - if (typeof chunk === 'string' && !this[OBJECTMODE] && - // unless it is a string already ready for us to use - !(encoding === this[ENCODING] && !this[DECODER].lastNeed)) { - chunk = B.from(chunk, encoding) - } - - if (B.isBuffer(chunk) && this[ENCODING]) - chunk = this[DECODER].write(chunk) - - try { - return this.flowing - ? (this.emit('data', chunk), this.flowing) - : (this[BUFFERPUSH](chunk), false) - } finally { - if (this[BUFFERLENGTH] !== 0) - this.emit('readable') - if (cb) - cb() - } - } - - read (n) { - if (this[DESTROYED]) - return null - - try { - if (this[BUFFERLENGTH] === 0 || n === 0 || n > this[BUFFERLENGTH]) - return null - - if (this[OBJECTMODE]) - n = null - - if (this.buffer.length > 1 && !this[OBJECTMODE]) { - if (this.encoding) - this.buffer = new Yallist([ - Array.from(this.buffer).join('') - ]) - else - this.buffer = new Yallist([ - B.concat(Array.from(this.buffer), this[BUFFERLENGTH]) - ]) - } - - return this[READ](n || null, this.buffer.head.value) - } finally { - this[MAYBE_EMIT_END]() - } - } - - [READ] (n, chunk) { - if (n === chunk.length || n === null) - this[BUFFERSHIFT]() - else { - this.buffer.head.value = chunk.slice(n) - chunk = chunk.slice(0, n) - this[BUFFERLENGTH] -= n - } - - this.emit('data', chunk) - - if (!this.buffer.length && !this[EOF]) - this.emit('drain') - - return chunk - } - - end (chunk, encoding, cb) { - if (typeof chunk === 'function') - cb = chunk, chunk = null - if (typeof encoding === 'function') - cb = encoding, encoding = 'utf8' - if (chunk) - this.write(chunk, encoding) - if (cb) - this.once('end', cb) - this[EOF] = true - this.writable = false - - // if we haven't written anything, then go ahead and emit, - // even if we're not reading. - // we'll re-emit if a new 'end' listener is added anyway. - // This makes MP more suitable to write-only use cases. - if (this.flowing || !this[PAUSED]) - this[MAYBE_EMIT_END]() - return this - } - - // don't let the internal resume be overwritten - [RESUME] () { - if (this[DESTROYED]) - return - - this[PAUSED] = false - this[FLOWING] = true - this.emit('resume') - if (this.buffer.length) - this[FLUSH]() - else if (this[EOF]) - this[MAYBE_EMIT_END]() - else - this.emit('drain') - } - - resume () { - return this[RESUME]() - } - - pause () { - this[FLOWING] = false - this[PAUSED] = true - } - - get destroyed () { - return this[DESTROYED] - } - - get flowing () { - return this[FLOWING] - } - - get paused () { - return this[PAUSED] - } - - [BUFFERPUSH] (chunk) { - if (this[OBJECTMODE]) - this[BUFFERLENGTH] += 1 - else - this[BUFFERLENGTH] += chunk.length - return this.buffer.push(chunk) - } - - [BUFFERSHIFT] () { - if (this.buffer.length) { - if (this[OBJECTMODE]) - this[BUFFERLENGTH] -= 1 - else - this[BUFFERLENGTH] -= this.buffer.head.value.length - } - return this.buffer.shift() - } - - [FLUSH] () { - do {} while (this[FLUSHCHUNK](this[BUFFERSHIFT]())) - - if (!this.buffer.length && !this[EOF]) - this.emit('drain') - } - - [FLUSHCHUNK] (chunk) { - return chunk ? (this.emit('data', chunk), this.flowing) : false - } - - pipe (dest, opts) { - if (this[DESTROYED]) - return - - const ended = this[EMITTED_END] - opts = opts || {} - if (dest === process.stdout || dest === process.stderr) - opts.end = false - else - opts.end = opts.end !== false - - const p = { dest: dest, opts: opts, ondrain: _ => this[RESUME]() } - this.pipes.push(p) - - dest.on('drain', p.ondrain) - this[RESUME]() - // piping an ended stream ends immediately - if (ended && p.opts.end) - p.dest.end() - return dest - } - - addListener (ev, fn) { - return this.on(ev, fn) - } - - on (ev, fn) { - try { - return super.on(ev, fn) - } finally { - if (ev === 'data' && !this.pipes.length && !this.flowing) - this[RESUME]() - else if (isEndish(ev) && this[EMITTED_END]) { - super.emit(ev) - this.removeAllListeners(ev) - } - } - } - - get emittedEnd () { - return this[EMITTED_END] - } - - [MAYBE_EMIT_END] () { - if (!this[EMITTING_END] && - !this[EMITTED_END] && - !this[DESTROYED] && - this.buffer.length === 0 && - this[EOF]) { - this[EMITTING_END] = true - this.emit('end') - this.emit('prefinish') - this.emit('finish') - if (this[CLOSED]) - this.emit('close') - this[EMITTING_END] = false - } - } - - emit (ev, data) { - // error and close are only events allowed after calling destroy() - if (ev !== 'error' && ev !== 'close' && ev !== DESTROYED && this[DESTROYED]) - return - else if (ev === 'data') { - if (!data) - return - - if (this.pipes.length) - this.pipes.forEach(p => - p.dest.write(data) === false && this.pause()) - } else if (ev === 'end') { - // only actual end gets this treatment - if (this[EMITTED_END] === true) - return - - this[EMITTED_END] = true - this.readable = false - - if (this[DECODER]) { - data = this[DECODER].end() - if (data) { - this.pipes.forEach(p => p.dest.write(data)) - super.emit('data', data) - } - } - - this.pipes.forEach(p => { - p.dest.removeListener('drain', p.ondrain) - if (p.opts.end) - p.dest.end() - }) - } else if (ev === 'close') { - this[CLOSED] = true - // don't emit close before 'end' and 'finish' - if (!this[EMITTED_END] && !this[DESTROYED]) - return - } - - // TODO: replace with a spread operator when Node v4 support drops - const args = new Array(arguments.length) - args[0] = ev - args[1] = data - if (arguments.length > 2) { - for (let i = 2; i < arguments.length; i++) { - args[i] = arguments[i] - } - } - - try { - return super.emit.apply(this, args) - } finally { - if (!isEndish(ev)) - this[MAYBE_EMIT_END]() - else - this.removeAllListeners(ev) - } - } - - // const all = await stream.collect() - collect () { - const buf = [] - buf.dataLength = 0 - this.on('data', c => { - buf.push(c) - buf.dataLength += c.length - }) - return this.promise().then(() => buf) - } - - // const data = await stream.concat() - concat () { - return this[OBJECTMODE] - ? Promise.reject(new Error('cannot concat in objectMode')) - : this.collect().then(buf => - this[OBJECTMODE] - ? Promise.reject(new Error('cannot concat in objectMode')) - : this[ENCODING] ? buf.join('') : B.concat(buf, buf.dataLength)) - } - - // stream.promise().then(() => done, er => emitted error) - promise () { - return new Promise((resolve, reject) => { - this.on(DESTROYED, () => reject(new Error('stream destroyed'))) - this.on('end', () => resolve()) - this.on('error', er => reject(er)) - }) - } - - // for await (let chunk of stream) - [ASYNCITERATOR] () { - const next = () => { - const res = this.read() - if (res !== null) - return Promise.resolve({ done: false, value: res }) - - if (this[EOF]) - return Promise.resolve({ done: true }) - - let resolve = null - let reject = null - const onerr = er => { - this.removeListener('data', ondata) - this.removeListener('end', onend) - reject(er) - } - const ondata = value => { - this.removeListener('error', onerr) - this.removeListener('end', onend) - this.pause() - resolve({ value: value, done: !!this[EOF] }) - } - const onend = () => { - this.removeListener('error', onerr) - this.removeListener('data', ondata) - resolve({ done: true }) - } - const ondestroy = () => onerr(new Error('stream destroyed')) - return new Promise((res, rej) => { - reject = rej - resolve = res - this.once(DESTROYED, ondestroy) - this.once('error', onerr) - this.once('end', onend) - this.once('data', ondata) - }) - } - - return { next } - } - - // for (let chunk of stream) - [ITERATOR] () { - const next = () => { - const value = this.read() - const done = value === null - return { value, done } - } - return { next } - } - - destroy (er) { - if (this[DESTROYED]) { - if (er) - this.emit('error', er) - else - this.emit(DESTROYED) - return this - } - - this[DESTROYED] = true - - // throw away all buffered data, it's never coming out - this.buffer = new Yallist() - this[BUFFERLENGTH] = 0 - - if (typeof this.close === 'function' && !this[CLOSED]) - this.close() - - if (er) - this.emit('error', er) - else // if no error to emit, still reject pending promises - this.emit(DESTROYED) - - return this - } - - static isStream (s) { - return !!s && (s instanceof Minipass || s instanceof EE && ( - typeof s.pipe === 'function' || // readable - (typeof s.write === 'function' && typeof s.end === 'function') // writable - )) - } -} |