\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/alt/alt-nodejs9/root/usr/lib/node_modules/npm/node_modules/tar/lib/

Viewing File: extract.js

'use strict'

// tar -x
const hlo = require('./high-level-opt.js')
const Unpack = require('./unpack.js')
const fs = require('fs')
const path = require('path')

const x = module.exports = (opt_, files, cb) => {
  if (typeof opt_ === 'function')
    cb = opt_, files = null, opt_ = {}
  else if (Array.isArray(opt_))
    files = opt_, opt_ = {}

  if (typeof files === 'function')
    cb = files, files = null

  if (!files)
    files = []
  else
    files = Array.from(files)

  const opt = hlo(opt_)

  if (opt.sync && typeof cb === 'function')
    throw new TypeError('callback not supported for sync tar functions')

  if (!opt.file && typeof cb === 'function')
    throw new TypeError('callback only supported with file option')

  if (files.length)
    filesFilter(opt, files)

  return opt.file && opt.sync ? extractFileSync(opt)
    : opt.file ? extractFile(opt, cb)
    : opt.sync ? extractSync(opt)
    : extract(opt)
}

// construct a filter that limits the file entries listed
// include child entries if a dir is included
const filesFilter = (opt, files) => {
  const map = new Map(files.map(f => [f.replace(/\/+$/, ''), true]))
  const filter = opt.filter

  const mapHas = (file, r) => {
    const root = r || path.parse(file).root || '.'
    const ret = file === root ? false
      : map.has(file) ? map.get(file)
      : mapHas(path.dirname(file), root)

    map.set(file, ret)
    return ret
  }

  opt.filter = filter
    ? (file, entry) => filter(file, entry) && mapHas(file.replace(/\/+$/, ''))
    : file => mapHas(file.replace(/\/+$/, ''))
}

const extractFileSync = opt => {
  const u = new Unpack.Sync(opt)

  const file = opt.file
  let threw = true
  let fd
  try {
    const stat = fs.statSync(file)
    const readSize = opt.maxReadSize || 16*1024*1024
    if (stat.size < readSize)
      u.end(fs.readFileSync(file))
    else {
      let pos = 0
      const buf = Buffer.allocUnsafe(readSize)
      fd = fs.openSync(file, 'r')
      while (pos < stat.size) {
        let bytesRead = fs.readSync(fd, buf, 0, readSize, pos)
        pos += bytesRead
        u.write(buf.slice(0, bytesRead))
      }
      u.end()
      fs.closeSync(fd)
    }
    threw = false
  } finally {
    if (threw && fd)
      try { fs.closeSync(fd) } catch (er) {}
  }
}

const extractFile = (opt, cb) => {
  const u = new Unpack(opt)
  const readSize = opt.maxReadSize || 16*1024*1024

  const file = opt.file
  const p = new Promise((resolve, reject) => {
    u.on('error', reject)
    u.on('close', resolve)

    fs.stat(file, (er, stat) => {
      if (er)
        reject(er)
      else if (stat.size < readSize)
        fs.readFile(file, (er, data) => {
          if (er)
            return reject(er)
          u.end(data)
        })
      else {
        const stream = fs.createReadStream(file, {
          highWaterMark: readSize
        })
        stream.on('error', reject)
        stream.pipe(u)
      }
    })
  })
  return cb ? p.then(cb, cb) : p
}

const extractSync = opt => {
  return new Unpack.Sync(opt)
}

const extract = opt => {
  return new Unpack(opt)
}