/usr/lib/node_modules/pnpm/dist/node_modules/tar/dist/esm
Edit: /usr/lib/node_modules/pnpm/dist/node_modules/tar/dist/esm/header.js (10604B)
// 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.)
import { posix as pathModule } from 'node:path';
import * as large from './large-numbers.js';
import * as types from './types.js';
export class Header {
cksumValid = false;
needPax = false;
nullBlock = false;
block;
path;
mode;
uid;
gid;
size;
cksum;
#type = 'Unsupported';
linkpath;
uname;
gname;
devmaj = 0;
devmin = 0;
atime;
ctime;
mtime;
charset;
comment;
constructor(data, off = 0, ex, gex) {
if (Buffer.isBuffer(data)) {
this.decode(data, off || 0, ex, gex);
}
else if (data) {
this.#slurp(data);
}
}
decode(buf, off, ex, gex) {
if (!off) {
off = 0;
}
if (!buf || !(buf.length >= off + 512)) {
throw new Error('need 512 bytes for header');
}
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);
// if we have extended or global extended headers, apply them now
// See https://github.com/npm/node-tar/pull/187
// Apply global before local, so it overrides
if (gex)
this.#slurp(gex, true);
if (ex)
this.#slurp(ex);
// old tar versions marked dirs as a file with a trailing /
const t = decString(buf, off + 156, 1);
if (types.isCode(t)) {
this.#type = t || '0';
}
if (this.#type === '0' && this.path.slice(-1) === '/') {
this.#type = '5';
}
// 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;
}
this.linkpath = decString(buf, off + 157, 100);
if (buf.subarray(off + 257, off + 265).toString() ===
'ustar\u000000') {
this.uname = decString(buf, off + 265, 32);
this.gname = decString(buf, off + 297, 32);
/* c8 ignore start */
this.devmaj = decNumber(buf, off + 329, 8) ?? 0;
this.devmin = decNumber(buf, off + 337, 8) ?? 0;
/* c8 ignore stop */
if (buf[off + 475] !== 0) {
// definitely a prefix, definitely >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);
}
}
let sum = 8 * 0x20;
for (let i = off; i < off + 148; i++) {
sum += buf[i];
}
for (let i = off + 156; i < off + 512; i++) {
sum += buf[i];
}
this.cksumValid = sum === this.cksum;
if (this.cksum === undefined && sum === 8 * 0x20) {
this.nullBlock = true;
}
}
#slurp(ex, gex = false) {
Object.assign(this, Object.fromEntries(Object.entries(ex).filter(([k, v]) => {
// we slurp in everything except for the path attribute in
// a global extended header, because that's weird. Also, any
// null/undefined values are ignored.
return !(v === null ||
v === undefined ||
(k === 'path' && gex) ||
(k === 'linkpath' && gex) ||
k === 'global');
})));
}
encode(buf, off = 0) {
if (!buf) {
buf = this.block = Buffer.alloc(512);
}
if (this.#type === 'Unsupported') {
this.#type = '0';
}
if (!(buf.length >= off + 512)) {
throw new Error('need 512 bytes for header');
}
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];
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;
}
let sum = 8 * 0x20;
for (let i = off; i < off + 148; i++) {
sum += buf[i];
}
for (let i = off + 156; i < off + 512; i++) {
sum += buf[i];
}
this.cksum = sum;
encNumber(buf, off + 148, 8, this.cksum);
this.cksumValid = true;
return this.needPax;
}
get type() {
return (this.#type === 'Unsupported' ?
this.#type
: types.name.get(this.#type));
}
get typeKey() {
return this.#type;
}
set type(type) {
const c = String(types.code.get(type));
if (types.isCode(c) || c === 'Unsupported') {
this.#type = c;
}
else if (types.isCode(type)) {
this.#type = type;
}
else {
throw new TypeError('invalid entry type: ' + type);
}
}
}
const splitPrefix = (p, prefixSize) => {
const pathSize = 100;
let pp = p;
let prefix = '';
let ret = undefined;
const root = pathModule.parse(p).root || '.';
if (Buffer.byteLength(pp) < 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);
do {
if (Buffer.byteLength(pp) <= pathSize &&
Buffer.byteLength(prefix) <= prefixSize) {
// both fit!
ret = [pp, prefix, false];
}
else if (Buffer.byteLength(pp) > pathSize &&
Buffer.byteLength(prefix) <= prefixSize) {
// prefix fits in prefix, but path doesn't fit in path
ret = [pp.slice(0, pathSize - 1), prefix, true];
}
else {
// make path take a bit from prefix
pp = pathModule.join(pathModule.basename(prefix), pp);
prefix = pathModule.dirname(prefix);
}
} while (prefix !== root && ret === undefined);
// at this point, found no resolution, just truncate
if (!ret) {
ret = [p.slice(0, pathSize - 1), '', true];
}
}
return ret;
};
const decString = (buf, off, size) => buf
.subarray(off, off + size)
.toString('utf8')
.replace(/\0.*/, '');
const decDate = (buf, off, size) => numToDate(decNumber(buf, off, size));
const numToDate = (num) => num === undefined ? undefined : new Date(num * 1000);
const decNumber = (buf, off, size) => Number(buf[off]) & 0x80 ?
large.parse(buf.subarray(off, off + size))
: decSmallNumber(buf, off, size);
const nanUndef = (value) => (isNaN(value) ? undefined : value);
const decSmallNumber = (buf, off, size) => nanUndef(parseInt(buf
.subarray(off, off + size)
.toString('utf8')
.replace(/\0.*$/, '')
.trim(), 8));
// the maximum encodable as a null-terminated octal, by field size
const MAXNUM = {
12: 0o77777777777,
8: 0o7777777,
};
const encNumber = (buf, off, size, num) => num === undefined ? false
: num > MAXNUM[size] || num < 0 ?
(large.encode(num, buf.subarray(off, off + size)), true)
: (encSmallNumber(buf, off, size, num), false);
const encSmallNumber = (buf, off, size, num) => buf.write(octalString(num, size), off, size, 'ascii');
const octalString = (num, size) => padOctal(Math.floor(num).toString(8), size);
const padOctal = (str, size) => (str.length === size - 1 ?
str
: new Array(size - str.length - 1).join('0') + str + ' ') + '\0';
const encDate = (buf, off, size, date) => date === undefined ? false : (encNumber(buf, off, size, date.getTime() / 1000));
// 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, str) => str === undefined ? false : ((buf.write(str + NULLS, off, size, 'utf8'),
str.length !== Buffer.byteLength(str) || str.length > size));
//# sourceMappingURL=header.js.map