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import { basename } from 'node:path';
import { Header } from './header.js';
export class Pax {
atime;
mtime;
ctime;
charset;
comment;
gid;
uid;
gname;
uname;
linkpath;
dev;
ino;
nlink;
path;
size;
mode;
global;
constructor(obj, global = false) {
this.atime = obj.atime;
this.charset = obj.charset;
this.comment = obj.comment;
this.ctime = obj.ctime;
this.dev = obj.dev;
this.gid = obj.gid;
this.global = global;
this.gname = obj.gname;
this.ino = obj.ino;
this.linkpath = obj.linkpath;
this.mtime = obj.mtime;
this.nlink = obj.nlink;
this.path = obj.path;
this.size = obj.size;
this.uid = obj.uid;
this.uname = obj.uname;
}
encode() {
const body = this.encodeBody();
if (body === '') {
return Buffer.allocUnsafe(0);
}
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
/* c8 ignore start */
path: ('PaxHeader/' + basename(this.path ?? '')).slice(0, 99),
/* c8 ignore stop */
mode: this.mode || 0o644,
uid: this.uid,
gid: this.gid,
size: bodyLen,
mtime: this.mtime,
type: this.global ? 'GlobalExtendedHeader' : 'ExtendedHeader',
linkpath: '',
uname: this.uname || '',
gname: this.gname || '',
devmaj: 0,
devmin: 0,
atime: this.atime,
ctime: this.ctime,
}).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] === undefined) {
return '';
}
const r = this[field];
const v = r instanceof Date ? r.getTime() / 1000 : r;
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;
}
static parse(str, ex, g = false) {
return new Pax(merge(parseKV(str), ex), g);
}
}
const merge = (a, b) => b ? Object.assign({}, b, a) : a;
const parseKV = (str) => str
.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.slice((n + ' ').length);
const kv = line.split('=');
const r = kv.shift();
if (!r) {
return set;
}
const k = r.replace(/^SCHILY\.(dev|ino|nlink)/, '$1');
const v = kv.join('=').replace(/\0.*/, '');
switch (k) {
case 'path':
case 'linkpath':
case 'type':
case 'charset':
case 'comment':
case 'gname':
case 'uname':
set[k] = v;
break;
case 'ctime':
case 'atime':
case 'mtime':
set[k] = new Date(Number(v) * 1000);
break;
case 'size':
const s = +v;
if (s >= 0)
set[k] = s;
break;
case 'gid':
case 'uid':
case 'dev':
case 'ino':
case 'nlink':
case 'mode':
set[k] = +v;
break;
}
return set;
};
//# sourceMappingURL=pax.js.map
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