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 <a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> pax.js
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 100% 
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 62/62
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 60/60
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&nbsp;</td><td class="text"><pre class="prettyprint lang-js">'use strict'
const Header = require('./header.js')
const path = require('path')
&nbsp;
class Pax {
 constructor (obj, global) {
 this.atime = obj.atime || null
 this.charset = obj.charset || null
 this.comment = obj.comment || null
 this.ctime = obj.ctime || null
 this.gid = obj.gid || null
 this.gname = obj.gname || null
 this.linkpath = obj.linkpath || null
 this.mtime = obj.mtime || null
 this.path = obj.path || null
 this.size = obj.size || null
 this.uid = obj.uid || null
 this.uname = obj.uname || null
 this.dev = obj.dev || null
 this.ino = obj.ino || null
 this.nlink = obj.nlink || null
 this.global = global || false
 }
&nbsp;
 encode () {
 const body = this.encodeBody()
 if (body === '')
 return null
&nbsp;
 const bodyLen = Buffer.byteLength(body)
 // round up to 512 bytes
 // add 512 for header
 const bufLen = 512 * Math.ceil(1 + bodyLen / 512)
 const buf = Buffer.allocUnsafe(bufLen)
&nbsp;
 // 0-fill the header section, it might not hit every field
 for (let i = 0; i &lt; 512; i++) {
 buf[i] = 0
 }
&nbsp;
 new Header({
 // XXX split the path
 // then the path should be PaxHeader + basename, but less than 99,
 // prepend with the dirname
 path: ('PaxHeader/' + path.basename(this.path)).slice(0, 99),
 mode: this.mode || 0o644,
 uid: this.uid || null,
 gid: this.gid || null,
 size: bodyLen,
 mtime: this.mtime || null,
 type: this.global ? 'GlobalExtendedHeader' : 'ExtendedHeader',
 linkpath: '',
 uname: this.uname || '',
 gname: this.gname || '',
 devmaj: 0,
 devmin: 0,
 atime: this.atime || null,
 ctime: this.ctime || null
 }).encode(buf)
&nbsp;
 buf.write(body, 512, bodyLen, 'utf8')
&nbsp;
 // null pad after the body
 for (let i = bodyLen + 512; i &lt; buf.length; i++) {
 buf[i] = 0
 }
&nbsp;
 return buf
 }
&nbsp;
 encodeBody () {
 return (
 this.encodeField('path') +
 this.encodeField('ctime') +
 this.encodeField('atime') +
 this.encodeField('dev') +
 this.encodeField('ino') +
 this.encodeField('nlink') +
 this.encodeField('charset') +
 this.encodeField('comment') +
 this.encodeField('gid') +
 this.encodeField('gname') +
 this.encodeField('linkpath') +
 this.encodeField('mtime') +
 this.encodeField('size') +
 this.encodeField('uid') +
 this.encodeField('uname')
 )
 }
&nbsp;
 encodeField (field) {
 if (this[field] === null || this[field] === undefined)
 return ''
 const v = this[field] instanceof Date ? this[field].getTime() / 1000
 : this[field]
 const s = ' ' +
 (field === 'dev' || field === 'ino' || field === 'nlink'
 ? 'SCHILY.' : '') +
 field + '=' + v + '\n'
 const byteLen = Buffer.byteLength(s)
 // the digits includes the length of the digits in ascii base-10
 // so if it's 9 characters, then adding 1 for the 9 makes it 10
 // which makes it 11 chars.
 let digits = Math.floor(Math.log(byteLen) / Math.log(10)) + 1
 if (byteLen + digits &gt;= Math.pow(10, digits))
 digits += 1
 const len = digits + byteLen
 return len + s
 }
}
&nbsp;
Pax.parse = (string, ex, g) =&gt; new Pax(merge(parseKV(string), ex), g)
&nbsp;
const merge = (a, b) =&gt;
 b ? Object.keys(a).reduce((s, k) =&gt; (s[k] = a[k], s), b) : a
&nbsp;
const parseKV = string =&gt;
 string
 .replace(/\n$/, '')
 .split('\n')
 .reduce(parseKVLine, Object.create(null))
&nbsp;
const parseKVLine = (set, line) =&gt; {
 const n = parseInt(line, 10)
&nbsp;
 // XXX Values with \n in them will fail this.
 // Refactor to not be a naive line-by-line parse.
 if (n !== Buffer.byteLength(line) + 1)
 return set
&nbsp;
 line = line.substr((n + ' ').length)
 const kv = line.split('=')
 const k = kv.shift().replace(/^SCHILY\.(dev|ino|nlink)/, '$1')
 if (!k)
 return set
&nbsp;
 const v = kv.join('=')
 set[k] = /^([A-Z]+\.)?([mac]|birth|creation)time$/.test(k)
 ? new Date(v * 1000)
 : /^[0-9]+$/.test(v) ? +v
 : v
 return set
}
&nbsp;
module.exports = Pax
&nbsp;</pre></td></tr>
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 Code coverage
 generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Mon Nov 20 2017 16:00:38 GMT-0800 (PST)
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