diff options
Diffstat (limited to 'sandbox/testAppNevena/Front/node_modules/tar/lib/pax.js')
-rw-r--r-- | sandbox/testAppNevena/Front/node_modules/tar/lib/pax.js | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/sandbox/testAppNevena/Front/node_modules/tar/lib/pax.js b/sandbox/testAppNevena/Front/node_modules/tar/lib/pax.js new file mode 100644 index 00000000..7768c7b4 --- /dev/null +++ b/sandbox/testAppNevena/Front/node_modules/tar/lib/pax.js @@ -0,0 +1,143 @@ +'use strict' +const Header = require('./header.js') +const path = require('path') + +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 + } + + encode () { + const body = this.encodeBody() + if (body === '') + return null + + 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) + + // 0-fill the header section, it might not hit every field + for (let i = 0; i < 512; i++) + buf[i] = 0 + + 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) + + buf.write(body, 512, bodyLen, 'utf8') + + // null pad after the body + for (let i = bodyLen + 512; i < buf.length; i++) + buf[i] = 0 + + return buf + } + + 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') + ) + } + + 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 >= Math.pow(10, digits)) + digits += 1 + const len = digits + byteLen + return len + s + } +} + +Pax.parse = (string, ex, g) => new Pax(merge(parseKV(string), ex), g) + +const merge = (a, b) => + b ? Object.keys(a).reduce((s, k) => (s[k] = a[k], s), b) : a + +const parseKV = string => + string + .replace(/\n$/, '') + .split('\n') + .reduce(parseKVLine, Object.create(null)) + +const parseKVLine = (set, line) => { + const n = parseInt(line, 10) + + // 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 + + line = line.substr((n + ' ').length) + const kv = line.split('=') + const k = kv.shift().replace(/^SCHILY\.(dev|ino|nlink)/, '$1') + if (!k) + return set + + const v = kv.join('=') + set[k] = /^([A-Z]+\.)?([mac]|birth|creation)time$/.test(k) + ? new Date(v * 1000) + : /^[0-9]+$/.test(v) ? +v + : v + return set +} + +module.exports = Pax |