diff options
Diffstat (limited to 'deps/npm/node_modules/pacote/node_modules/tar-stream/headers.js')
| -rw-r--r-- | deps/npm/node_modules/pacote/node_modules/tar-stream/headers.js | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/deps/npm/node_modules/pacote/node_modules/tar-stream/headers.js b/deps/npm/node_modules/pacote/node_modules/tar-stream/headers.js deleted file mode 100644 index 8aab8b5618..0000000000 --- a/deps/npm/node_modules/pacote/node_modules/tar-stream/headers.js +++ /dev/null @@ -1,286 +0,0 @@ -var ZEROS = '0000000000000000000' -var SEVENS = '7777777777777777777' -var ZERO_OFFSET = '0'.charCodeAt(0) -var USTAR = 'ustar\x0000' -var MASK = parseInt('7777', 8) - -var clamp = function (index, len, defaultValue) { - if (typeof index !== 'number') return defaultValue - index = ~~index // Coerce to integer. - if (index >= len) return len - if (index >= 0) return index - index += len - if (index >= 0) return index - return 0 -} - -var toType = function (flag) { - switch (flag) { - case 0: - return 'file' - case 1: - return 'link' - case 2: - return 'symlink' - case 3: - return 'character-device' - case 4: - return 'block-device' - case 5: - return 'directory' - case 6: - return 'fifo' - case 7: - return 'contiguous-file' - case 72: - return 'pax-header' - case 55: - return 'pax-global-header' - case 27: - return 'gnu-long-link-path' - case 28: - case 30: - return 'gnu-long-path' - } - - return null -} - -var toTypeflag = function (flag) { - switch (flag) { - case 'file': - return 0 - case 'link': - return 1 - case 'symlink': - return 2 - case 'character-device': - return 3 - case 'block-device': - return 4 - case 'directory': - return 5 - case 'fifo': - return 6 - case 'contiguous-file': - return 7 - case 'pax-header': - return 72 - } - - return 0 -} - -var alloc = function (size) { - var buf = new Buffer(size) - buf.fill(0) - return buf -} - -var indexOf = function (block, num, offset, end) { - for (; offset < end; offset++) { - if (block[offset] === num) return offset - } - return end -} - -var cksum = function (block) { - var sum = 8 * 32 - for (var i = 0; i < 148; i++) sum += block[i] - for (var j = 156; j < 512; j++) sum += block[j] - return sum -} - -var encodeOct = function (val, n) { - val = val.toString(8) - if (val.length > n) return SEVENS.slice(0, n) + ' ' - else return ZEROS.slice(0, n - val.length) + val + ' ' -} - -/* Copied from the node-tar repo and modified to meet - * tar-stream coding standard. - * - * Source: https://github.com/npm/node-tar/blob/51b6627a1f357d2eb433e7378e5f05e83b7aa6cd/lib/header.js#L349 - */ -function parse256 (buf) { - // first byte MUST be either 80 or FF - // 80 for positive, FF for 2's comp - var positive - if (buf[0] === 0x80) positive = true - else if (buf[0] === 0xFF) positive = false - else return null - - // build up a base-256 tuple from the least sig to the highest - var zero = false - var tuple = [] - for (var i = buf.length - 1; i > 0; i--) { - var byte = buf[i] - if (positive) tuple.push(byte) - else if (zero && byte === 0) tuple.push(0) - else if (zero) { - zero = false - tuple.push(0x100 - byte) - } else tuple.push(0xFF - byte) - } - - var sum = 0 - var l = tuple.length - for (i = 0; i < l; i++) { - sum += tuple[i] * Math.pow(256, i) - } - - return positive ? sum : -1 * sum -} - -var decodeOct = function (val, offset, length) { - val = val.slice(offset, offset + length) - offset = 0 - - // If prefixed with 0x80 then parse as a base-256 integer - if (val[offset] & 0x80) { - return parse256(val) - } else { - // Older versions of tar can prefix with spaces - while (offset < val.length && val[offset] === 32) offset++ - var end = clamp(indexOf(val, 32, offset, val.length), val.length, val.length) - while (offset < end && val[offset] === 0) offset++ - if (end === offset) return 0 - return parseInt(val.slice(offset, end).toString(), 8) - } -} - -var decodeStr = function (val, offset, length) { - return val.slice(offset, indexOf(val, 0, offset, offset + length)).toString() -} - -var addLength = function (str) { - var len = Buffer.byteLength(str) - var digits = Math.floor(Math.log(len) / Math.log(10)) + 1 - if (len + digits > Math.pow(10, digits)) digits++ - - return (len + digits) + str -} - -exports.decodeLongPath = function (buf) { - return decodeStr(buf, 0, buf.length) -} - -exports.encodePax = function (opts) { // TODO: encode more stuff in pax - var result = '' - if (opts.name) result += addLength(' path=' + opts.name + '\n') - if (opts.linkname) result += addLength(' linkpath=' + opts.linkname + '\n') - var pax = opts.pax - if (pax) { - for (var key in pax) { - result += addLength(' ' + key + '=' + pax[key] + '\n') - } - } - return new Buffer(result) -} - -exports.decodePax = function (buf) { - var result = {} - - while (buf.length) { - var i = 0 - while (i < buf.length && buf[i] !== 32) i++ - var len = parseInt(buf.slice(0, i).toString(), 10) - if (!len) return result - - var b = buf.slice(i + 1, len - 1).toString() - var keyIndex = b.indexOf('=') - if (keyIndex === -1) return result - result[b.slice(0, keyIndex)] = b.slice(keyIndex + 1) - - buf = buf.slice(len) - } - - return result -} - -exports.encode = function (opts) { - var buf = alloc(512) - var name = opts.name - var prefix = '' - - if (opts.typeflag === 5 && name[name.length - 1] !== '/') name += '/' - if (Buffer.byteLength(name) !== name.length) return null // utf-8 - - while (Buffer.byteLength(name) > 100) { - var i = name.indexOf('/') - if (i === -1) return null - prefix += prefix ? '/' + name.slice(0, i) : name.slice(0, i) - name = name.slice(i + 1) - } - - if (Buffer.byteLength(name) > 100 || Buffer.byteLength(prefix) > 155) return null - if (opts.linkname && Buffer.byteLength(opts.linkname) > 100) return null - - buf.write(name) - buf.write(encodeOct(opts.mode & MASK, 6), 100) - buf.write(encodeOct(opts.uid, 6), 108) - buf.write(encodeOct(opts.gid, 6), 116) - buf.write(encodeOct(opts.size, 11), 124) - buf.write(encodeOct((opts.mtime.getTime() / 1000) | 0, 11), 136) - - buf[156] = ZERO_OFFSET + toTypeflag(opts.type) - - if (opts.linkname) buf.write(opts.linkname, 157) - - buf.write(USTAR, 257) - if (opts.uname) buf.write(opts.uname, 265) - if (opts.gname) buf.write(opts.gname, 297) - buf.write(encodeOct(opts.devmajor || 0, 6), 329) - buf.write(encodeOct(opts.devminor || 0, 6), 337) - - if (prefix) buf.write(prefix, 345) - - buf.write(encodeOct(cksum(buf), 6), 148) - - return buf -} - -exports.decode = function (buf) { - var typeflag = buf[156] === 0 ? 0 : buf[156] - ZERO_OFFSET - - var name = decodeStr(buf, 0, 100) - var mode = decodeOct(buf, 100, 8) - var uid = decodeOct(buf, 108, 8) - var gid = decodeOct(buf, 116, 8) - var size = decodeOct(buf, 124, 12) - var mtime = decodeOct(buf, 136, 12) - var type = toType(typeflag) - var linkname = buf[157] === 0 ? null : decodeStr(buf, 157, 100) - var uname = decodeStr(buf, 265, 32) - var gname = decodeStr(buf, 297, 32) - var devmajor = decodeOct(buf, 329, 8) - var devminor = decodeOct(buf, 337, 8) - - if (buf[345]) name = decodeStr(buf, 345, 155) + '/' + name - - // to support old tar versions that use trailing / to indicate dirs - if (typeflag === 0 && name && name[name.length - 1] === '/') typeflag = 5 - - var c = cksum(buf) - - // checksum is still initial value if header was null. - if (c === 8 * 32) return null - - // valid checksum - if (c !== decodeOct(buf, 148, 8)) throw new Error('Invalid tar header. Maybe the tar is corrupted or it needs to be gunzipped?') - - return { - name: name, - mode: mode, - uid: uid, - gid: gid, - size: size, - mtime: new Date(1000 * mtime), - type: type, - linkname: linkname, - uname: uname, - gname: gname, - devmajor: devmajor, - devminor: devminor - } -} |