add node_modules to address #4364

1 files changed, 638 insertions, 0 deletions

diff --git a/node_modules/yazl/index.js b/node_modules/yazl/index.js
new file mode 100644
index 000000000..b9338fabd
--- /dev/null
+++ b/node_modules/yazl/index.js
@@ -0,0 +1,638 @@
+var fs = require("fs");
+var Transform = require("stream").Transform;
+var PassThrough = require("stream").PassThrough;
+var zlib = require("zlib");
+var util = require("util");
+var EventEmitter = require("events").EventEmitter;
+var crc32 = require("buffer-crc32");
+
+exports.ZipFile = ZipFile;
+exports.dateToDosDateTime = dateToDosDateTime;
+
+util.inherits(ZipFile, EventEmitter);
+function ZipFile() {
+  this.outputStream = new PassThrough();
+  this.entries = [];
+  this.outputStreamCursor = 0;
+  this.ended = false; // .end() sets this
+  this.allDone = false; // set when we've written the last bytes
+  this.forceZip64Eocd = false; // configurable in .end()
+}
+
+ZipFile.prototype.addFile = function(realPath, metadataPath, options) {
+  var self = this;
+  metadataPath = validateMetadataPath(metadataPath, false);
+  if (options == null) options = {};
+
+  var entry = new Entry(metadataPath, false, options);
+  self.entries.push(entry);
+  fs.stat(realPath, function(err, stats) {
+    if (err) return self.emit("error", err);
+    if (!stats.isFile()) return self.emit("error", new Error("not a file: " + realPath));
+    entry.uncompressedSize = stats.size;
+    if (options.mtime == null) entry.setLastModDate(stats.mtime);
+    if (options.mode == null) entry.setFileAttributesMode(stats.mode);
+    entry.setFileDataPumpFunction(function() {
+      var readStream = fs.createReadStream(realPath);
+      entry.state = Entry.FILE_DATA_IN_PROGRESS;
+      readStream.on("error", function(err) {
+        self.emit("error", err);
+      });
+      pumpFileDataReadStream(self, entry, readStream);
+    });
+    pumpEntries(self);
+  });
+};
+
+ZipFile.prototype.addReadStream = function(readStream, metadataPath, options) {
+  var self = this;
+  metadataPath = validateMetadataPath(metadataPath, false);
+  if (options == null) options = {};
+  var entry = new Entry(metadataPath, false, options);
+  self.entries.push(entry);
+  entry.setFileDataPumpFunction(function() {
+    entry.state = Entry.FILE_DATA_IN_PROGRESS;
+    pumpFileDataReadStream(self, entry, readStream);
+  });
+  pumpEntries(self);
+};
+
+ZipFile.prototype.addBuffer = function(buffer, metadataPath, options) {
+  var self = this;
+  metadataPath = validateMetadataPath(metadataPath, false);
+  if (buffer.length > 0x3fffffff) throw new Error("buffer too large: " + buffer.length + " > " + 0x3fffffff);
+  if (options == null) options = {};
+  if (options.size != null) throw new Error("options.size not allowed");
+  var entry = new Entry(metadataPath, false, options);
+  entry.uncompressedSize = buffer.length;
+  entry.crc32 = crc32.unsigned(buffer);
+  entry.crcAndFileSizeKnown = true;
+  self.entries.push(entry);
+  if (!entry.compress) {
+    setCompressedBuffer(buffer);
+  } else {
+    zlib.deflateRaw(buffer, function(err, compressedBuffer) {
+      setCompressedBuffer(compressedBuffer);
+    });
+  }
+  function setCompressedBuffer(compressedBuffer) {
+    entry.compressedSize = compressedBuffer.length;
+    entry.setFileDataPumpFunction(function() {
+      writeToOutputStream(self, compressedBuffer);
+      writeToOutputStream(self, entry.getDataDescriptor());
+      entry.state = Entry.FILE_DATA_DONE;
+
+      // don't call pumpEntries() recursively.
+      // (also, don't call process.nextTick recursively.)
+      setImmediate(function() {
+        pumpEntries(self);
+      });
+    });
+    pumpEntries(self);
+  }
+};
+
+ZipFile.prototype.addEmptyDirectory = function(metadataPath, options) {
+  var self = this;
+  metadataPath = validateMetadataPath(metadataPath, true);
+  if (options == null) options = {};
+  if (options.size != null) throw new Error("options.size not allowed");
+  if (options.compress != null) throw new Error("options.compress not allowed");
+  var entry = new Entry(metadataPath, true, options);
+  self.entries.push(entry);
+  entry.setFileDataPumpFunction(function() {
+    writeToOutputStream(self, entry.getDataDescriptor());
+    entry.state = Entry.FILE_DATA_DONE;
+    pumpEntries(self);
+  });
+  pumpEntries(self);
+};
+
+ZipFile.prototype.end = function(options, finalSizeCallback) {
+  if (typeof options === "function") {
+    finalSizeCallback = options;
+    options = null;
+  }
+  if (options == null) options = {};
+  if (this.ended) return;
+  this.ended = true;
+  this.finalSizeCallback = finalSizeCallback;
+  this.forceZip64Eocd = !!options.forceZip64Format;
+  pumpEntries(this);
+};
+
+function writeToOutputStream(self, buffer) {
+  self.outputStream.write(buffer);
+  self.outputStreamCursor += buffer.length;
+}
+
+function pumpFileDataReadStream(self, entry, readStream) {
+  var crc32Watcher = new Crc32Watcher();
+  var uncompressedSizeCounter = new ByteCounter();
+  var compressor = entry.compress ? new zlib.DeflateRaw() : new PassThrough();
+  var compressedSizeCounter = new ByteCounter();
+  readStream.pipe(crc32Watcher)
+            .pipe(uncompressedSizeCounter)
+            .pipe(compressor)
+            .pipe(compressedSizeCounter)
+            .pipe(self.outputStream, {end: false});
+  compressedSizeCounter.on("end", function() {
+    entry.crc32 = crc32Watcher.crc32;
+    if (entry.uncompressedSize == null) {
+      entry.uncompressedSize = uncompressedSizeCounter.byteCount;
+    } else {
+      if (entry.uncompressedSize !== uncompressedSizeCounter.byteCount) return self.emit("error", new Error("file data stream has unexpected number of bytes"));
+    }
+    entry.compressedSize = compressedSizeCounter.byteCount;
+    self.outputStreamCursor += entry.compressedSize;
+    writeToOutputStream(self, entry.getDataDescriptor());
+    entry.state = Entry.FILE_DATA_DONE;
+    pumpEntries(self);
+  });
+}
+
+function pumpEntries(self) {
+  if (self.allDone) return;
+  // first check if finalSize is finally known
+  if (self.ended && self.finalSizeCallback != null) {
+    var finalSize = calculateFinalSize(self);
+    if (finalSize != null) {
+      // we have an answer
+      self.finalSizeCallback(finalSize);
+      self.finalSizeCallback = null;
+    }
+  }
+
+  // pump entries
+  var entry = getFirstNotDoneEntry();
+  function getFirstNotDoneEntry() {
+    for (var i = 0; i < self.entries.length; i++) {
+      var entry = self.entries[i];
+      if (entry.state < Entry.FILE_DATA_DONE) return entry;
+    }
+    return null;
+  }
+  if (entry != null) {
+    // this entry is not done yet
+    if (entry.state < Entry.READY_TO_PUMP_FILE_DATA) return; // input file not open yet
+    if (entry.state === Entry.FILE_DATA_IN_PROGRESS) return; // we'll get there
+    // start with local file header
+    entry.relativeOffsetOfLocalHeader = self.outputStreamCursor;
+    var localFileHeader = entry.getLocalFileHeader();
+    writeToOutputStream(self, localFileHeader);
+    entry.doFileDataPump();
+  } else {
+    // all cought up on writing entries
+    if (self.ended) {
+      // head for the exit
+      self.offsetOfStartOfCentralDirectory = self.outputStreamCursor;
+      self.entries.forEach(function(entry) {
+        var centralDirectoryRecord = entry.getCentralDirectoryRecord();
+        writeToOutputStream(self, centralDirectoryRecord);
+      });
+      writeToOutputStream(self, getEndOfCentralDirectoryRecord(self));
+      self.outputStream.end();
+      self.allDone = true;
+    }
+  }
+}
+
+function calculateFinalSize(self) {
+  var pretendOutputCursor = 0;
+  var centralDirectorySize = 0;
+  for (var i = 0; i < self.entries.length; i++) {
+    var entry = self.entries[i];
+    // compression is too hard to predict
+    if (entry.compress) return -1;
+    if (entry.state >= Entry.READY_TO_PUMP_FILE_DATA) {
+      // if addReadStream was called without providing the size, we can't predict the final size
+      if (entry.uncompressedSize == null) return -1;
+    } else {
+      // if we're still waiting for fs.stat, we might learn the size someday
+      if (entry.uncompressedSize == null) return null;
+    }
+    // we know this for sure, and this is important to know if we need ZIP64 format.
+    entry.relativeOffsetOfLocalHeader = pretendOutputCursor;
+    var useZip64Format = entry.useZip64Format();
+
+    pretendOutputCursor += LOCAL_FILE_HEADER_FIXED_SIZE + entry.utf8FileName.length;
+    pretendOutputCursor += entry.uncompressedSize;
+    if (!entry.crcAndFileSizeKnown) {
+      // use a data descriptor
+      if (useZip64Format) {
+        pretendOutputCursor += ZIP64_DATA_DESCRIPTOR_SIZE;
+      } else {
+        pretendOutputCursor += DATA_DESCRIPTOR_SIZE;
+      }
+    }
+
+    centralDirectorySize += CENTRAL_DIRECTORY_RECORD_FIXED_SIZE + entry.utf8FileName.length;
+    if (useZip64Format) {
+      centralDirectorySize += ZIP64_EXTENDED_INFORMATION_EXTRA_FIELD_SIZE;
+    }
+  }
+
+  var endOfCentralDirectorySize = 0;
+  if (self.forceZip64Eocd ||
+      self.entries.length >= 0xffff ||
+      centralDirectorySize >= 0xffff ||
+      pretendOutputCursor >= 0xffffffff) {
+    // use zip64 end of central directory stuff
+    endOfCentralDirectorySize += ZIP64_END_OF_CENTRAL_DIRECTORY_RECORD_SIZE + ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIZE;
+  }
+  endOfCentralDirectorySize += END_OF_CENTRAL_DIRECTORY_RECORD_SIZE;
+  return pretendOutputCursor + centralDirectorySize + endOfCentralDirectorySize;
+}
+
+var ZIP64_END_OF_CENTRAL_DIRECTORY_RECORD_SIZE = 56;
+var ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIZE = 20;
+var END_OF_CENTRAL_DIRECTORY_RECORD_SIZE = 22;
+function getEndOfCentralDirectoryRecord(self, actuallyJustTellMeHowLongItWouldBe) {
+  var needZip64Format = false;
+  var normalEntriesLength = self.entries.length;
+  if (self.forceZip64Eocd || self.entries.length >= 0xffff) {
+    normalEntriesLength = 0xffff;
+    needZip64Format = true;
+  }
+  var sizeOfCentralDirectory = self.outputStreamCursor - self.offsetOfStartOfCentralDirectory;
+  var normalSizeOfCentralDirectory = sizeOfCentralDirectory;
+  if (self.forceZip64Eocd || sizeOfCentralDirectory >= 0xffffffff) {
+    normalSizeOfCentralDirectory = 0xffffffff;
+    needZip64Format = true;
+  }
+  var normalOffsetOfStartOfCentralDirectory = self.offsetOfStartOfCentralDirectory;
+  if (self.forceZip64Eocd || self.offsetOfStartOfCentralDirectory >= 0xffffffff) {
+    normalOffsetOfStartOfCentralDirectory = 0xffffffff;
+    needZip64Format = true;
+  }
+  if (actuallyJustTellMeHowLongItWouldBe) {
+    if (needZip64Format) {
+      return (
+        ZIP64_END_OF_CENTRAL_DIRECTORY_RECORD_SIZE +
+        ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIZE +
+        END_OF_CENTRAL_DIRECTORY_RECORD_SIZE
+      );
+    } else {
+      return END_OF_CENTRAL_DIRECTORY_RECORD_SIZE;
+    }
+  }
+
+  var eocdrBuffer = new Buffer(END_OF_CENTRAL_DIRECTORY_RECORD_SIZE);
+  // end of central dir signature                       4 bytes  (0x06054b50)
+  eocdrBuffer.writeUInt32LE(0x06054b50, 0);
+  // number of this disk                                2 bytes
+  eocdrBuffer.writeUInt16LE(0, 4);
+  // number of the disk with the start of the central directory  2 bytes
+  eocdrBuffer.writeUInt16LE(0, 6);
+  // total number of entries in the central directory on this disk  2 bytes
+  eocdrBuffer.writeUInt16LE(normalEntriesLength, 8);
+  // total number of entries in the central directory   2 bytes
+  eocdrBuffer.writeUInt16LE(normalEntriesLength, 10);
+  // size of the central directory                      4 bytes
+  eocdrBuffer.writeUInt32LE(normalSizeOfCentralDirectory, 12);
+  // offset of start of central directory with respect to the starting disk number  4 bytes
+  eocdrBuffer.writeUInt32LE(normalOffsetOfStartOfCentralDirectory, 16);
+  // .ZIP file comment length                           2 bytes
+  eocdrBuffer.writeUInt16LE(0, 20);
+  // .ZIP file comment                                  (variable size)
+  // no comment
+
+  if (!needZip64Format) return eocdrBuffer;
+
+  // ZIP64 format
+  // ZIP64 End of Central Directory Record
+  var zip64EocdrBuffer = new Buffer(ZIP64_END_OF_CENTRAL_DIRECTORY_RECORD_SIZE);
+  // zip64 end of central dir signature                                             4 bytes  (0x06064b50)
+  zip64EocdrBuffer.writeUInt32LE(0x06064b50, 0);
+  // size of zip64 end of central directory record                                  8 bytes
+  writeUInt64LE(zip64EocdrBuffer, ZIP64_END_OF_CENTRAL_DIRECTORY_RECORD_SIZE - 12, 4);
+  // version made by                                                                2 bytes
+  zip64EocdrBuffer.writeUInt16LE(VERSION_MADE_BY, 12);
+  // version needed to extract                                                      2 bytes
+  zip64EocdrBuffer.writeUInt16LE(VERSION_NEEDED_TO_EXTRACT_ZIP64, 14);
+  // number of this disk                                                            4 bytes
+  zip64EocdrBuffer.writeUInt32LE(0, 16);
+  // number of the disk with the start of the central directory                     4 bytes
+  zip64EocdrBuffer.writeUInt32LE(0, 20);
+  // total number of entries in the central directory on this disk                  8 bytes
+  writeUInt64LE(zip64EocdrBuffer, self.entries.length, 24);
+  // total number of entries in the central directory                               8 bytes
+  writeUInt64LE(zip64EocdrBuffer, self.entries.length, 32);
+  // size of the central directory                                                  8 bytes
+  writeUInt64LE(zip64EocdrBuffer, sizeOfCentralDirectory, 40);
+  // offset of start of central directory with respect to the starting disk number  8 bytes
+  writeUInt64LE(zip64EocdrBuffer, self.offsetOfStartOfCentralDirectory, 48);
+  // zip64 extensible data sector                                                   (variable size)
+  // nothing in the zip64 extensible data sector
+
+
+  // ZIP64 End of Central Directory Locator
+  var zip64EocdlBuffer = new Buffer(ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIZE);
+  // zip64 end of central dir locator signature                               4 bytes  (0x07064b50)
+  zip64EocdlBuffer.writeUInt32LE(0x07064b50, 0);
+  // number of the disk with the start of the zip64 end of central directory  4 bytes
+  zip64EocdlBuffer.writeUInt32LE(0, 4);
+  // relative offset of the zip64 end of central directory record             8 bytes
+  writeUInt64LE(zip64EocdlBuffer, self.outputStreamCursor, 8);
+  // total number of disks                                                    4 bytes
+  zip64EocdlBuffer.writeUInt32LE(1, 16);
+
+
+  return Buffer.concat([
+    zip64EocdrBuffer,
+    zip64EocdlBuffer,
+    eocdrBuffer,
+  ]);
+}
+
+function validateMetadataPath(metadataPath, isDirectory) {
+  if (metadataPath === "") throw new Error("empty metadataPath");
+  metadataPath = metadataPath.replace(/\\/g, "/");
+  if (/^[a-zA-Z]:/.test(metadataPath) || /^\//.test(metadataPath)) throw new Error("absolute path: " + metadataPath);
+  if (metadataPath.split("/").indexOf("..") !== -1) throw new Error("invalid relative path: " + metadataPath);
+  var looksLikeDirectory = /\/$/.test(metadataPath);
+  if (isDirectory) {
+    // append a trailing '/' if necessary.
+    if (!looksLikeDirectory) metadataPath += "/";
+  } else {
+    if (looksLikeDirectory) throw new Error("file path cannot end with '/': " + metadataPath);
+  }
+  return metadataPath;
+}
+
+// this class is not part of the public API
+function Entry(metadataPath, isDirectory, options) {
+  this.utf8FileName = new Buffer(metadataPath);
+  if (this.utf8FileName.length > 0xffff) throw new Error("utf8 file name too long. " + utf8FileName.length + " > " + 0xffff);
+  this.isDirectory = isDirectory;
+  this.state = Entry.WAITING_FOR_METADATA;
+  this.setLastModDate(options.mtime != null ? options.mtime : new Date());
+  if (options.mode != null) {
+    this.setFileAttributesMode(options.mode);
+  } else {
+    this.setFileAttributesMode(isDirectory ? 040775 : 0100664);
+  }
+  if (isDirectory) {
+    this.crcAndFileSizeKnown = true;
+    this.crc32 = 0;
+    this.uncompressedSize = 0;
+    this.compressedSize = 0;
+  } else {
+    // unknown so far
+    this.crcAndFileSizeKnown = false;
+    this.crc32 = null;
+    this.uncompressedSize = null;
+    this.compressedSize = null;
+    if (options.size != null) this.uncompressedSize = options.size;
+  }
+  if (isDirectory) {
+    this.compress = false;
+  } else {
+    this.compress = true; // default
+    if (options.compress != null) this.compress = !!options.compress;
+  }
+  this.forceZip64Format = !!options.forceZip64Format;
+}
+Entry.WAITING_FOR_METADATA = 0;
+Entry.READY_TO_PUMP_FILE_DATA = 1;
+Entry.FILE_DATA_IN_PROGRESS = 2;
+Entry.FILE_DATA_DONE = 3;
+Entry.prototype.setLastModDate = function(date) {
+  var dosDateTime = dateToDosDateTime(date);
+  this.lastModFileTime = dosDateTime.time;
+  this.lastModFileDate = dosDateTime.date;
+};
+Entry.prototype.setFileAttributesMode = function(mode) {
+  if ((mode & 0xffff) !== mode) throw new Error("invalid mode. expected: 0 <= " + mode + " <= " + 0xffff);
+  // http://unix.stackexchange.com/questions/14705/the-zip-formats-external-file-attribute/14727#14727
+  this.externalFileAttributes = (mode << 16) >>> 0;
+};
+// doFileDataPump() should not call pumpEntries() directly. see issue #9.
+Entry.prototype.setFileDataPumpFunction = function(doFileDataPump) {
+  this.doFileDataPump = doFileDataPump;
+  this.state = Entry.READY_TO_PUMP_FILE_DATA;
+};
+Entry.prototype.useZip64Format = function() {
+  return (
+    (this.forceZip64Format) ||
+    (this.uncompressedSize != null && this.uncompressedSize > 0xfffffffe) ||
+    (this.compressedSize != null && this.compressedSize > 0xfffffffe) ||
+    (this.relativeOffsetOfLocalHeader != null && this.relativeOffsetOfLocalHeader > 0xfffffffe)
+  );
+}
+var LOCAL_FILE_HEADER_FIXED_SIZE = 30;
+var VERSION_NEEDED_TO_EXTRACT_UTF8 = 20;
+var VERSION_NEEDED_TO_EXTRACT_ZIP64 = 45;
+// 3 = unix. 63 = spec version 6.3
+var VERSION_MADE_BY = (3 << 8) | 63;
+var FILE_NAME_IS_UTF8 = 1 << 11;
+var UNKNOWN_CRC32_AND_FILE_SIZES = 1 << 3;
+Entry.prototype.getLocalFileHeader = function() {
+  var crc32 = 0;
+  var compressedSize = 0;
+  var uncompressedSize = 0;
+  if (this.crcAndFileSizeKnown) {
+    crc32 = this.crc32;
+    compressedSize = this.compressedSize;
+    uncompressedSize = this.uncompressedSize;
+  }
+
+  var fixedSizeStuff = new Buffer(LOCAL_FILE_HEADER_FIXED_SIZE);
+  var generalPurposeBitFlag = FILE_NAME_IS_UTF8;
+  if (!this.crcAndFileSizeKnown) generalPurposeBitFlag |= UNKNOWN_CRC32_AND_FILE_SIZES;
+
+  // local file header signature     4 bytes  (0x04034b50)
+  fixedSizeStuff.writeUInt32LE(0x04034b50, 0);
+  // version needed to extract       2 bytes
+  fixedSizeStuff.writeUInt16LE(VERSION_NEEDED_TO_EXTRACT_UTF8, 4);
+  // general purpose bit flag        2 bytes
+  fixedSizeStuff.writeUInt16LE(generalPurposeBitFlag, 6);
+  // compression method              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.getCompressionMethod(), 8);
+  // last mod file time              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.lastModFileTime, 10);
+  // last mod file date              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.lastModFileDate, 12);
+  // crc-32                          4 bytes
+  fixedSizeStuff.writeUInt32LE(crc32, 14);
+  // compressed size                 4 bytes
+  fixedSizeStuff.writeUInt32LE(compressedSize, 18);
+  // uncompressed size               4 bytes
+  fixedSizeStuff.writeUInt32LE(uncompressedSize, 22);
+  // file name length                2 bytes
+  fixedSizeStuff.writeUInt16LE(this.utf8FileName.length, 26);
+  // extra field length              2 bytes
+  fixedSizeStuff.writeUInt16LE(0, 28);
+  return Buffer.concat([
+    fixedSizeStuff,
+    // file name (variable size)
+    this.utf8FileName,
+    // extra field (variable size)
+    // no extra fields
+  ]);
+};
+var DATA_DESCRIPTOR_SIZE = 16;
+var ZIP64_DATA_DESCRIPTOR_SIZE = 24;
+Entry.prototype.getDataDescriptor = function() {
+  if (this.crcAndFileSizeKnown) {
+    // the Mac Archive Utility requires this not be present unless we set general purpose bit 3
+    return new Buffer(0);
+  }
+  if (!this.useZip64Format()) {
+    var buffer = new Buffer(DATA_DESCRIPTOR_SIZE);
+    // optional signature (required according to Archive Utility)
+    buffer.writeUInt32LE(0x08074b50, 0);
+    // crc-32                          4 bytes
+    buffer.writeUInt32LE(this.crc32, 4);
+    // compressed size                 4 bytes
+    buffer.writeUInt32LE(this.compressedSize, 8);
+    // uncompressed size               4 bytes
+    buffer.writeUInt32LE(this.uncompressedSize, 12);
+    return buffer;
+  } else {
+    // ZIP64 format
+    var buffer = new Buffer(ZIP64_DATA_DESCRIPTOR_SIZE);
+    // optional signature (unknown if anyone cares about this)
+    buffer.writeUInt32LE(0x08074b50, 0);
+    // crc-32                          4 bytes
+    buffer.writeUInt32LE(this.crc32, 4);
+    // compressed size                 8 bytes
+    writeUInt64LE(buffer, this.compressedSize, 8);
+    // uncompressed size               8 bytes
+    writeUInt64LE(buffer, this.uncompressedSize, 16);
+    return buffer;
+  }
+};
+var CENTRAL_DIRECTORY_RECORD_FIXED_SIZE = 46;
+var ZIP64_EXTENDED_INFORMATION_EXTRA_FIELD_SIZE = 28;
+Entry.prototype.getCentralDirectoryRecord = function() {
+  var fixedSizeStuff = new Buffer(CENTRAL_DIRECTORY_RECORD_FIXED_SIZE);
+  var generalPurposeBitFlag = FILE_NAME_IS_UTF8;
+  if (!this.crcAndFileSizeKnown) generalPurposeBitFlag |= UNKNOWN_CRC32_AND_FILE_SIZES;
+
+  var normalCompressedSize = this.compressedSize;
+  var normalUncompressedSize = this.uncompressedSize;
+  var normalRelativeOffsetOfLocalHeader = this.relativeOffsetOfLocalHeader;
+  var versionNeededToExtract;
+  var zeiefBuffer;
+  if (this.useZip64Format()) {
+    normalCompressedSize = 0xffffffff;
+    normalUncompressedSize = 0xffffffff;
+    normalRelativeOffsetOfLocalHeader = 0xffffffff;
+    versionNeededToExtract = VERSION_NEEDED_TO_EXTRACT_ZIP64;
+
+    // ZIP64 extended information extra field
+    zeiefBuffer = new Buffer(ZIP64_EXTENDED_INFORMATION_EXTRA_FIELD_SIZE);
+    // 0x0001                  2 bytes    Tag for this "extra" block type
+    zeiefBuffer.writeUInt16LE(0x0001, 0);
+    // Size                    2 bytes    Size of this "extra" block
+    zeiefBuffer.writeUInt16LE(ZIP64_EXTENDED_INFORMATION_EXTRA_FIELD_SIZE - 4, 2);
+    // Original Size           8 bytes    Original uncompressed file size
+    writeUInt64LE(zeiefBuffer, this.uncompressedSize, 4);
+    // Compressed Size         8 bytes    Size of compressed data
+    writeUInt64LE(zeiefBuffer, this.compressedSize, 12);
+    // Relative Header Offset  8 bytes    Offset of local header record
+    writeUInt64LE(zeiefBuffer, this.relativeOffsetOfLocalHeader, 20);
+    // Disk Start Number       4 bytes    Number of the disk on which this file starts
+    // (omit)
+  } else {
+    versionNeededToExtract = VERSION_NEEDED_TO_EXTRACT_UTF8;
+    zeiefBuffer = new Buffer(0);
+  }
+
+  // central file header signature   4 bytes  (0x02014b50)
+  fixedSizeStuff.writeUInt32LE(0x02014b50, 0);
+  // version made by                 2 bytes
+  fixedSizeStuff.writeUInt16LE(VERSION_MADE_BY, 4);
+  // version needed to extract       2 bytes
+  fixedSizeStuff.writeUInt16LE(versionNeededToExtract, 6);
+  // general purpose bit flag        2 bytes
+  fixedSizeStuff.writeUInt16LE(generalPurposeBitFlag, 8);
+  // compression method              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.getCompressionMethod(), 10);
+  // last mod file time              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.lastModFileTime, 12);
+  // last mod file date              2 bytes
+  fixedSizeStuff.writeUInt16LE(this.lastModFileDate, 14);
+  // crc-32                          4 bytes
+  fixedSizeStuff.writeUInt32LE(this.crc32, 16);
+  // compressed size                 4 bytes
+  fixedSizeStuff.writeUInt32LE(normalCompressedSize, 20);
+  // uncompressed size               4 bytes
+  fixedSizeStuff.writeUInt32LE(normalUncompressedSize, 24);
+  // file name length                2 bytes
+  fixedSizeStuff.writeUInt16LE(this.utf8FileName.length, 28);
+  // extra field length              2 bytes
+  fixedSizeStuff.writeUInt16LE(zeiefBuffer.length, 30);
+  // file comment length             2 bytes
+  fixedSizeStuff.writeUInt16LE(0, 32);
+  // disk number start               2 bytes
+  fixedSizeStuff.writeUInt16LE(0, 34);
+  // internal file attributes        2 bytes
+  fixedSizeStuff.writeUInt16LE(0, 36);
+  // external file attributes        4 bytes
+  fixedSizeStuff.writeUInt32LE(this.externalFileAttributes, 38);
+  // relative offset of local header 4 bytes
+  fixedSizeStuff.writeUInt32LE(normalRelativeOffsetOfLocalHeader, 42);
+
+  return Buffer.concat([
+    fixedSizeStuff,
+    // file name (variable size)
+    this.utf8FileName,
+    // extra field (variable size)
+    zeiefBuffer,
+    // file comment (variable size)
+    // empty comment
+  ]);
+};
+Entry.prototype.getCompressionMethod = function() {
+  var NO_COMPRESSION = 0;
+  var DEFLATE_COMPRESSION = 8;
+  return this.compress ? DEFLATE_COMPRESSION : NO_COMPRESSION;
+};
+
+function dateToDosDateTime(jsDate) {
+  var date = 0;
+  date |= jsDate.getDate() & 0x1f; // 1-31
+  date |= ((jsDate.getMonth() + 1) & 0xf) << 5; // 0-11, 1-12
+  date |= ((jsDate.getFullYear() - 1980) & 0x7f) << 9; // 0-128, 1980-2108
+
+  var time = 0;
+  time |= Math.floor(jsDate.getSeconds() / 2); // 0-59, 0-29 (lose odd numbers)
+  time |= (jsDate.getMinutes() & 0x3f) << 5; // 0-59
+  time |= (jsDate.getHours() & 0x1f) << 11; // 0-23
+
+  return {date: date, time: time};
+}
+
+function writeUInt64LE(buffer, n, offset) {
+  // can't use bitshift here, because JavaScript only allows bitshiting on 32-bit integers.
+  var high = Math.floor(n / 0x100000000);
+  var low = n % 0x100000000;
+  buffer.writeUInt32LE(low, offset);
+  buffer.writeUInt32LE(high, offset + 4);
+}
+
+function defaultCallback(err) {
+  if (err) throw err;
+}
+
+util.inherits(ByteCounter, Transform);
+function ByteCounter(options) {
+  Transform.call(this, options);
+  this.byteCount = 0;
+}
+ByteCounter.prototype._transform = function(chunk, encoding, cb) {
+  this.byteCount += chunk.length;
+  cb(null, chunk);
+};
+
+util.inherits(Crc32Watcher, Transform);
+function Crc32Watcher(options) {
+  Transform.call(this, options);
+  this.crc32 = 0;
+}
+Crc32Watcher.prototype._transform = function(chunk, encoding, cb) {
+  this.crc32 = crc32.unsigned(chunk, this.crc32);
+  cb(null, chunk);
+};