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apache / nifi-fds / 6435e394f6c7c31d3f61a4bfc9702bde2a1659fa / . / node_modules / tar / coverage / lcov-report / tar / lib / header.js.html
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<title>Code coverage report for tar/lib/header.js</title>
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<h1>
<a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> header.js
</h1>
<div class='clearfix'>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Statements</span>
<span class='fraction'>161/161</span>
</div>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Branches</span>
<span class='fraction'>120/120</span>
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<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Functions</span>
<span class='fraction'>20/20</span>
</div>
<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Lines</span>
<span class='fraction'>159/159</span>
</div>
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<div class='status-line high'></div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict'
// parse a 512-byte header block to a data object, or vice-versa
// encode returns `true` if a pax extended header is needed, because
// the data could not be faithfully encoded in a simple header.
// (Also, check header.needPax to see if it needs a pax header.)
&nbsp;
const types = require('./types.js')
const pathModule = require('path')
const large = require('./large-numbers.js')
&nbsp;
const TYPE = Symbol('type')
&nbsp;
class Header {
constructor (data, off) {
this.cksumValid = false
this.needPax = false
this.nullBlock = false
&nbsp;
this.block = null
this.path = null
this.mode = null
this.uid = null
this.gid = null
this.size = null
this.mtime = null
this.cksum = null
this[TYPE] = '0'
this.linkpath = null
this.uname = null
this.gname = null
this.devmaj = 0
this.devmin = 0
this.atime = null
this.ctime = null
&nbsp;
if (Buffer.isBuffer(data)) {
this.decode(data, off || 0)
} else if (data)
this.set(data)
}
&nbsp;
decode (buf, off) {
if (!off)
off = 0
&nbsp;
if (!buf || !(buf.length &gt;= off + 512))
throw new Error('need 512 bytes for header')
&nbsp;
this.path = decString(buf, off, 100)
this.mode = decNumber(buf, off + 100, 8)
this.uid = decNumber(buf, off + 108, 8)
this.gid = decNumber(buf, off + 116, 8)
this.size = decNumber(buf, off + 124, 12)
this.mtime = decDate(buf, off + 136, 12)
this.cksum = decNumber(buf, off + 148, 12)
&nbsp;
// old tar versions marked dirs as a file with a trailing /
this[TYPE] = decString(buf, off + 156, 1)
if (this[TYPE] === '')
this[TYPE] = '0'
if (this[TYPE] === '0' &amp;&amp; this.path.substr(-1) === '/')
this[TYPE] = '5'
&nbsp;
// tar implementations sometimes incorrectly put the stat(dir).size
// as the size in the tarball, even though Directory entries are
// not able to have any body at all. In the very rare chance that
// it actually DOES have a body, we weren't going to do anything with
// it anyway, and it'll just be a warning about an invalid header.
if (this[TYPE] === '5')
this.size = 0
&nbsp;
this.linkpath = decString(buf, off + 157, 100)
if (buf.slice(off + 257, off + 265).toString() === 'ustar\u000000') {
this.uname = decString(buf, off + 265, 32)
this.gname = decString(buf, off + 297, 32)
this.devmaj = decNumber(buf, off + 329, 8)
this.devmin = decNumber(buf, off + 337, 8)
if (buf[off + 475] !== 0) {
// definitely a prefix, definitely &gt;130 chars.
const prefix = decString(buf, off + 345, 155)
this.path = prefix + '/' + this.path
} else {
const prefix = decString(buf, off + 345, 130)
if (prefix)
this.path = prefix + '/' + this.path
this.atime = decDate(buf, off + 476, 12)
this.ctime = decDate(buf, off + 488, 12)
}
}
&nbsp;
let sum = 8 * 0x20
for (let i = off; i &lt; off + 148; i++) {
sum += buf[i]
}
for (let i = off + 156; i &lt; off + 512; i++) {
sum += buf[i]
}
this.cksumValid = sum === this.cksum
if (this.cksum === null &amp;&amp; sum === 8 * 0x20)
this.nullBlock = true
}
&nbsp;
encode (buf, off) {
if (!buf) {
buf = this.block = Buffer.alloc(512)
off = 0
}
&nbsp;
if (!off)
off = 0
&nbsp;
if (!(buf.length &gt;= off + 512))
throw new Error('need 512 bytes for header')
&nbsp;
const prefixSize = this.ctime || this.atime ? 130 : 155
const split = splitPrefix(this.path || '', prefixSize)
const path = split[0]
const prefix = split[1]
this.needPax = split[2]
&nbsp;
this.needPax = encString(buf, off, 100, path) || this.needPax
this.needPax = encNumber(buf, off + 100, 8, this.mode) || this.needPax
this.needPax = encNumber(buf, off + 108, 8, this.uid) || this.needPax
this.needPax = encNumber(buf, off + 116, 8, this.gid) || this.needPax
this.needPax = encNumber(buf, off + 124, 12, this.size) || this.needPax
this.needPax = encDate(buf, off + 136, 12, this.mtime) || this.needPax
buf[off + 156] = this[TYPE].charCodeAt(0)
this.needPax = encString(buf, off + 157, 100, this.linkpath) || this.needPax
buf.write('ustar\u000000', off + 257, 8)
this.needPax = encString(buf, off + 265, 32, this.uname) || this.needPax
this.needPax = encString(buf, off + 297, 32, this.gname) || this.needPax
this.needPax = encNumber(buf, off + 329, 8, this.devmaj) || this.needPax
this.needPax = encNumber(buf, off + 337, 8, this.devmin) || this.needPax
this.needPax = encString(buf, off + 345, prefixSize, prefix) || this.needPax
if (buf[off + 475] !== 0)
this.needPax = encString(buf, off + 345, 155, prefix) || this.needPax
else {
this.needPax = encString(buf, off + 345, 130, prefix) || this.needPax
this.needPax = encDate(buf, off + 476, 12, this.atime) || this.needPax
this.needPax = encDate(buf, off + 488, 12, this.ctime) || this.needPax
}
&nbsp;
let sum = 8 * 0x20
for (let i = off; i &lt; off + 148; i++) {
sum += buf[i]
}
for (let i = off + 156; i &lt; off + 512; i++) {
sum += buf[i]
}
this.cksum = sum
encNumber(buf, off + 148, 8, this.cksum)
this.cksumValid = true
&nbsp;
return this.needPax
}
&nbsp;
set (data) {
for (let i in data) {
if (data[i] !== null &amp;&amp; data[i] !== undefined)
this[i] = data[i]
}
}
&nbsp;
get type () {
return types.name.get(this[TYPE]) || this[TYPE]
}
&nbsp;
get typeKey () {
return this[TYPE]
}
&nbsp;
set type (type) {
if (types.code.has(type))
this[TYPE] = types.code.get(type)
else
this[TYPE] = type
}
}
&nbsp;
const splitPrefix = (p, prefixSize) =&gt; {
const pathSize = 100
let pp = p
let prefix = ''
let ret
const root = pathModule.parse(p).root || '.'
&nbsp;
if (Buffer.byteLength(pp) &lt; pathSize)
ret = [pp, prefix, false]
else {
// first set prefix to the dir, and path to the base
prefix = pathModule.dirname(pp)
pp = pathModule.basename(pp)
&nbsp;
do {
// both fit!
if (Buffer.byteLength(pp) &lt;= pathSize &amp;&amp;
Buffer.byteLength(prefix) &lt;= prefixSize)
ret = [pp, prefix, false]
&nbsp;
// prefix fits in prefix, but path doesn't fit in path
else if (Buffer.byteLength(pp) &gt; pathSize &amp;&amp;
Buffer.byteLength(prefix) &lt;= prefixSize)
ret = [pp.substr(0, pathSize - 1), prefix, true]
&nbsp;
else {
// make path take a bit from prefix
pp = pathModule.join(pathModule.basename(prefix), pp)
prefix = pathModule.dirname(prefix)
}
} while (prefix !== root &amp;&amp; !ret)
&nbsp;
// at this point, found no resolution, just truncate
if (!ret)
ret = [p.substr(0, pathSize - 1), '', true]
}
return ret
}
&nbsp;
const decString = (buf, off, size) =&gt;
buf.slice(off, off + size).toString('utf8').replace(/\0.*/, '')
&nbsp;
const decDate = (buf, off, size) =&gt;
numToDate(decNumber(buf, off, size))
&nbsp;
const numToDate = num =&gt; num === null ? null : new Date(num * 1000)
&nbsp;
const decNumber = (buf, off, size) =&gt;
buf[off] &amp; 0x80 ? large.parse(buf.slice(off, off + size))
: decSmallNumber(buf, off, size)
&nbsp;
const nanNull = value =&gt; isNaN(value) ? null : value
&nbsp;
const decSmallNumber = (buf, off, size) =&gt;
nanNull(parseInt(
buf.slice(off, off + size)
.toString('utf8').replace(/\0.*$/, '').trim(), 8))
&nbsp;
// the maximum encodable as a null-terminated octal, by field size
const MAXNUM = {
12: 0o77777777777,
8 : 0o7777777
}
&nbsp;
const encNumber = (buf, off, size, number) =&gt;
number === null ? false :
number &gt; MAXNUM[size] || number &lt; 0
? (large.encode(number, buf.slice(off, off + size)), true)
: (encSmallNumber(buf, off, size, number), false)
&nbsp;
const encSmallNumber = (buf, off, size, number) =&gt;
buf.write(octalString(number, size), off, size, 'ascii')
&nbsp;
const octalString = (number, size) =&gt;
padOctal(Math.floor(number).toString(8), size)
&nbsp;
const padOctal = (string, size) =&gt;
(string.length === size - 1 ? string
: new Array(size - string.length - 1).join('0') + string + ' ') + '\0'
&nbsp;
const encDate = (buf, off, size, date) =&gt;
date === null ? false :
encNumber(buf, off, size, date.getTime() / 1000)
&nbsp;
// enough to fill the longest string we've got
const NULLS = new Array(156).join('\0')
// pad with nulls, return true if it's longer or non-ascii
const encString = (buf, off, size, string) =&gt;
string === null ? false :
(buf.write(string + NULLS, off, size, 'utf8'),
string.length !== Buffer.byteLength(string) || string.length &gt; size)
&nbsp;
module.exports = Header
&nbsp;</pre></td></tr>
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