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author | Rebecca Turner <me@re-becca.org> | 2018-04-20 18:26:37 -0700 |
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committer | Rebecca Turner <me@re-becca.org> | 2018-05-24 23:24:45 -0700 |
commit | 468ab4519e1b92473acefb22801497a1af6aebae (patch) | |
tree | bdac1d062cd4b094bde3a21147bab5d82c792ece /deps/npm/node_modules/minizlib/index.js | |
parent | ac8226115e2192a7a46ba07789fa5136f74223e1 (diff) | |
download | android-node-v8-468ab4519e1b92473acefb22801497a1af6aebae.tar.gz android-node-v8-468ab4519e1b92473acefb22801497a1af6aebae.tar.bz2 android-node-v8-468ab4519e1b92473acefb22801497a1af6aebae.zip |
deps: upgrade npm to 6.1.0
PR-URL: https://github.com/nodejs/node/pull/20190
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaƫl Zasso <targos@protonmail.com>
Diffstat (limited to 'deps/npm/node_modules/minizlib/index.js')
-rw-r--r-- | deps/npm/node_modules/minizlib/index.js | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/deps/npm/node_modules/minizlib/index.js b/deps/npm/node_modules/minizlib/index.js new file mode 100644 index 0000000000..10c8a8b486 --- /dev/null +++ b/deps/npm/node_modules/minizlib/index.js @@ -0,0 +1,364 @@ +'use strict' + +const assert = require('assert') +const Buffer = require('buffer').Buffer +const binding = process.binding('zlib') + +const constants = exports.constants = require('./constants.js') +const MiniPass = require('minipass') + +class ZlibError extends Error { + constructor (msg, errno) { + super('zlib: ' + msg) + this.errno = errno + this.code = codes.get(errno) + } + + get name () { + return 'ZlibError' + } +} + +// translation table for return codes. +const codes = new Map([ + [constants.Z_OK, 'Z_OK'], + [constants.Z_STREAM_END, 'Z_STREAM_END'], + [constants.Z_NEED_DICT, 'Z_NEED_DICT'], + [constants.Z_ERRNO, 'Z_ERRNO'], + [constants.Z_STREAM_ERROR, 'Z_STREAM_ERROR'], + [constants.Z_DATA_ERROR, 'Z_DATA_ERROR'], + [constants.Z_MEM_ERROR, 'Z_MEM_ERROR'], + [constants.Z_BUF_ERROR, 'Z_BUF_ERROR'], + [constants.Z_VERSION_ERROR, 'Z_VERSION_ERROR'] +]) + +const validFlushFlags = new Set([ + constants.Z_NO_FLUSH, + constants.Z_PARTIAL_FLUSH, + constants.Z_SYNC_FLUSH, + constants.Z_FULL_FLUSH, + constants.Z_FINISH, + constants.Z_BLOCK +]) + +const strategies = new Set([ + constants.Z_FILTERED, + constants.Z_HUFFMAN_ONLY, + constants.Z_RLE, + constants.Z_FIXED, + constants.Z_DEFAULT_STRATEGY +]) + +// the Zlib class they all inherit from +// This thing manages the queue of requests, and returns +// true or false if there is anything in the queue when +// you call the .write() method. +const _opts = Symbol('opts') +const _chunkSize = Symbol('chunkSize') +const _flushFlag = Symbol('flushFlag') +const _finishFlush = Symbol('finishFlush') +const _handle = Symbol('handle') +const _hadError = Symbol('hadError') +const _buffer = Symbol('buffer') +const _offset = Symbol('offset') +const _level = Symbol('level') +const _strategy = Symbol('strategy') +const _ended = Symbol('ended') +const _writeState = Symbol('writeState') + +class Zlib extends MiniPass { + constructor (opts, mode) { + super(opts) + this[_ended] = false + this[_opts] = opts = opts || {} + this[_chunkSize] = opts.chunkSize || constants.Z_DEFAULT_CHUNK + if (opts.flush && !validFlushFlags.has(opts.flush)) { + throw new TypeError('Invalid flush flag: ' + opts.flush) + } + if (opts.finishFlush && !validFlushFlags.has(opts.finishFlush)) { + throw new TypeError('Invalid flush flag: ' + opts.finishFlush) + } + + this[_flushFlag] = opts.flush || constants.Z_NO_FLUSH + this[_finishFlush] = typeof opts.finishFlush !== 'undefined' ? + opts.finishFlush : constants.Z_FINISH + + if (opts.chunkSize) { + if (opts.chunkSize < constants.Z_MIN_CHUNK) { + throw new RangeError('Invalid chunk size: ' + opts.chunkSize) + } + } + + if (opts.windowBits) { + if (opts.windowBits < constants.Z_MIN_WINDOWBITS || + opts.windowBits > constants.Z_MAX_WINDOWBITS) { + throw new RangeError('Invalid windowBits: ' + opts.windowBits) + } + } + + if (opts.level) { + if (opts.level < constants.Z_MIN_LEVEL || + opts.level > constants.Z_MAX_LEVEL) { + throw new RangeError('Invalid compression level: ' + opts.level) + } + } + + if (opts.memLevel) { + if (opts.memLevel < constants.Z_MIN_MEMLEVEL || + opts.memLevel > constants.Z_MAX_MEMLEVEL) { + throw new RangeError('Invalid memLevel: ' + opts.memLevel) + } + } + + if (opts.strategy && !(strategies.has(opts.strategy))) + throw new TypeError('Invalid strategy: ' + opts.strategy) + + if (opts.dictionary) { + if (!(opts.dictionary instanceof Buffer)) { + throw new TypeError('Invalid dictionary: it should be a Buffer instance') + } + } + + this[_handle] = new binding.Zlib(mode) + + this[_hadError] = false + this[_handle].onerror = (message, errno) => { + // there is no way to cleanly recover. + // continuing only obscures problems. + this.close() + this[_hadError] = true + + const error = new ZlibError(message, errno) + this.emit('error', error) + } + + const level = typeof opts.level === 'number' ? opts.level + : constants.Z_DEFAULT_COMPRESSION + + var strategy = typeof opts.strategy === 'number' ? opts.strategy + : constants.Z_DEFAULT_STRATEGY + + this[_writeState] = new Uint32Array(2); + const window = opts.windowBits || constants.Z_DEFAULT_WINDOWBITS + const memLevel = opts.memLevel || constants.Z_DEFAULT_MEMLEVEL + + // API changed in node v9 + /* istanbul ignore next */ + if (/^v[0-8]\./.test(process.version)) { + this[_handle].init(window, + level, + memLevel, + strategy, + opts.dictionary) + } else { + this[_handle].init(window, + level, + memLevel, + strategy, + this[_writeState], + () => {}, + opts.dictionary) + } + + this[_buffer] = Buffer.allocUnsafe(this[_chunkSize]) + this[_offset] = 0 + this[_level] = level + this[_strategy] = strategy + + this.once('end', this.close) + } + + close () { + if (this[_handle]) { + this[_handle].close() + this[_handle] = null + this.emit('close') + } + } + + params (level, strategy) { + if (!this[_handle]) + throw new Error('cannot switch params when binding is closed') + + // no way to test this without also not supporting params at all + /* istanbul ignore if */ + if (!this[_handle].params) + throw new Error('not supported in this implementation') + + if (level < constants.Z_MIN_LEVEL || + level > constants.Z_MAX_LEVEL) { + throw new RangeError('Invalid compression level: ' + level) + } + + if (!(strategies.has(strategy))) + throw new TypeError('Invalid strategy: ' + strategy) + + if (this[_level] !== level || this[_strategy] !== strategy) { + this.flush(constants.Z_SYNC_FLUSH) + assert(this[_handle], 'zlib binding closed') + this[_handle].params(level, strategy) + /* istanbul ignore else */ + if (!this[_hadError]) { + this[_level] = level + this[_strategy] = strategy + } + } + } + + reset () { + assert(this[_handle], 'zlib binding closed') + return this[_handle].reset() + } + + flush (kind) { + if (kind === undefined) + kind = constants.Z_FULL_FLUSH + + if (this.ended) + return + + const flushFlag = this[_flushFlag] + this[_flushFlag] = kind + this.write(Buffer.alloc(0)) + this[_flushFlag] = flushFlag + } + + end (chunk, encoding, cb) { + if (chunk) + this.write(chunk, encoding) + this.flush(this[_finishFlush]) + this[_ended] = true + return super.end(null, null, cb) + } + + get ended () { + return this[_ended] + } + + write (chunk, encoding, cb) { + // process the chunk using the sync process + // then super.write() all the outputted chunks + if (typeof encoding === 'function') + cb = encoding, encoding = 'utf8' + + if (typeof chunk === 'string') + chunk = new Buffer(chunk, encoding) + + let availInBefore = chunk && chunk.length + let availOutBefore = this[_chunkSize] - this[_offset] + let inOff = 0 // the offset of the input buffer + const flushFlag = this[_flushFlag] + let writeReturn = true + + assert(this[_handle], 'zlib binding closed') + do { + let res = this[_handle].writeSync( + flushFlag, + chunk, // in + inOff, // in_off + availInBefore, // in_len + this[_buffer], // out + this[_offset], //out_off + availOutBefore // out_len + ) + + if (this[_hadError]) + break + + // API changed in v9 + /* istanbul ignore next */ + let availInAfter = res ? res[0] : this[_writeState][1] + /* istanbul ignore next */ + let availOutAfter = res ? res[1] : this[_writeState][0] + + const have = availOutBefore - availOutAfter + assert(have >= 0, 'have should not go down') + + if (have > 0) { + const out = this[_buffer].slice( + this[_offset], this[_offset] + have + ) + + this[_offset] += have + // serve some output to the consumer. + writeReturn = super.write(out) && writeReturn + } + + // exhausted the output buffer, or used all the input create a new one. + if (availOutAfter === 0 || this[_offset] >= this[_chunkSize]) { + availOutBefore = this[_chunkSize] + this[_offset] = 0 + this[_buffer] = Buffer.allocUnsafe(this[_chunkSize]) + } + + if (availOutAfter === 0) { + // Not actually done. Need to reprocess. + // Also, update the availInBefore to the availInAfter value, + // so that if we have to hit it a third (fourth, etc.) time, + // it'll have the correct byte counts. + inOff += (availInBefore - availInAfter) + availInBefore = availInAfter + continue + } + break + } while (!this[_hadError]) + + if (cb) + cb() + return writeReturn + } +} + +// minimal 2-byte header +class Deflate extends Zlib { + constructor (opts) { + super(opts, constants.DEFLATE) + } +} + +class Inflate extends Zlib { + constructor (opts) { + super(opts, constants.INFLATE) + } +} + +// gzip - bigger header, same deflate compression +class Gzip extends Zlib { + constructor (opts) { + super(opts, constants.GZIP) + } +} + +class Gunzip extends Zlib { + constructor (opts) { + super(opts, constants.GUNZIP) + } +} + +// raw - no header +class DeflateRaw extends Zlib { + constructor (opts) { + super(opts, constants.DEFLATERAW) + } +} + +class InflateRaw extends Zlib { + constructor (opts) { + super(opts, constants.INFLATERAW) + } +} + +// auto-detect header. +class Unzip extends Zlib { + constructor (opts) { + super(opts, constants.UNZIP) + } +} + +exports.Deflate = Deflate +exports.Inflate = Inflate +exports.Gzip = Gzip +exports.Gunzip = Gunzip +exports.DeflateRaw = DeflateRaw +exports.InflateRaw = InflateRaw +exports.Unzip = Unzip |