You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
130 lines
4.4 KiB
JavaScript
130 lines
4.4 KiB
JavaScript
var Utils = require("../util"),
|
|
Constants = Utils.Constants;
|
|
|
|
/* The entries in the end of central directory */
|
|
module.exports = function () {
|
|
var _volumeEntries = 0,
|
|
_totalEntries = 0,
|
|
_size = 0,
|
|
_offset = 0,
|
|
_commentLength = 0;
|
|
|
|
return {
|
|
get diskEntries() {
|
|
return _volumeEntries;
|
|
},
|
|
set diskEntries(/*Number*/ val) {
|
|
_volumeEntries = _totalEntries = val;
|
|
},
|
|
|
|
get totalEntries() {
|
|
return _totalEntries;
|
|
},
|
|
set totalEntries(/*Number*/ val) {
|
|
_totalEntries = _volumeEntries = val;
|
|
},
|
|
|
|
get size() {
|
|
return _size;
|
|
},
|
|
set size(/*Number*/ val) {
|
|
_size = val;
|
|
},
|
|
|
|
get offset() {
|
|
return _offset;
|
|
},
|
|
set offset(/*Number*/ val) {
|
|
_offset = val;
|
|
},
|
|
|
|
get commentLength() {
|
|
return _commentLength;
|
|
},
|
|
set commentLength(/*Number*/ val) {
|
|
_commentLength = val;
|
|
},
|
|
|
|
get mainHeaderSize() {
|
|
return Constants.ENDHDR + _commentLength;
|
|
},
|
|
|
|
loadFromBinary: function (/*Buffer*/ data) {
|
|
// data should be 22 bytes and start with "PK 05 06"
|
|
// or be 56+ bytes and start with "PK 06 06" for Zip64
|
|
if (
|
|
(data.length !== Constants.ENDHDR || data.readUInt32LE(0) !== Constants.ENDSIG) &&
|
|
(data.length < Constants.ZIP64HDR || data.readUInt32LE(0) !== Constants.ZIP64SIG)
|
|
) {
|
|
throw new Error(Utils.Errors.INVALID_END);
|
|
}
|
|
|
|
if (data.readUInt32LE(0) === Constants.ENDSIG) {
|
|
// number of entries on this volume
|
|
_volumeEntries = data.readUInt16LE(Constants.ENDSUB);
|
|
// total number of entries
|
|
_totalEntries = data.readUInt16LE(Constants.ENDTOT);
|
|
// central directory size in bytes
|
|
_size = data.readUInt32LE(Constants.ENDSIZ);
|
|
// offset of first CEN header
|
|
_offset = data.readUInt32LE(Constants.ENDOFF);
|
|
// zip file comment length
|
|
_commentLength = data.readUInt16LE(Constants.ENDCOM);
|
|
} else {
|
|
// number of entries on this volume
|
|
_volumeEntries = Utils.readBigUInt64LE(data, Constants.ZIP64SUB);
|
|
// total number of entries
|
|
_totalEntries = Utils.readBigUInt64LE(data, Constants.ZIP64TOT);
|
|
// central directory size in bytes
|
|
_size = Utils.readBigUInt64LE(data, Constants.ZIP64SIZE);
|
|
// offset of first CEN header
|
|
_offset = Utils.readBigUInt64LE(data, Constants.ZIP64OFF);
|
|
|
|
_commentLength = 0;
|
|
}
|
|
},
|
|
|
|
toBinary: function () {
|
|
var b = Buffer.alloc(Constants.ENDHDR + _commentLength);
|
|
// "PK 05 06" signature
|
|
b.writeUInt32LE(Constants.ENDSIG, 0);
|
|
b.writeUInt32LE(0, 4);
|
|
// number of entries on this volume
|
|
b.writeUInt16LE(_volumeEntries, Constants.ENDSUB);
|
|
// total number of entries
|
|
b.writeUInt16LE(_totalEntries, Constants.ENDTOT);
|
|
// central directory size in bytes
|
|
b.writeUInt32LE(_size, Constants.ENDSIZ);
|
|
// offset of first CEN header
|
|
b.writeUInt32LE(_offset, Constants.ENDOFF);
|
|
// zip file comment length
|
|
b.writeUInt16LE(_commentLength, Constants.ENDCOM);
|
|
// fill comment memory with spaces so no garbage is left there
|
|
b.fill(" ", Constants.ENDHDR);
|
|
|
|
return b;
|
|
},
|
|
|
|
toJSON: function () {
|
|
// creates 0x0000 style output
|
|
const offset = function (nr, len) {
|
|
let offs = nr.toString(16).toUpperCase();
|
|
while (offs.length < len) offs = "0" + offs;
|
|
return "0x" + offs;
|
|
};
|
|
|
|
return {
|
|
diskEntries: _volumeEntries,
|
|
totalEntries: _totalEntries,
|
|
size: _size + " bytes",
|
|
offset: offset(_offset, 4),
|
|
commentLength: _commentLength
|
|
};
|
|
},
|
|
|
|
toString: function () {
|
|
return JSON.stringify(this.toJSON(), null, "\t");
|
|
}
|
|
};
|
|
};
|
|
// Misspelled
|