"use strict";Object.defineProperty(exports, "__esModule", { value: true });exports.Signature = exports.LocalFileHeaderToken = exports.FileHeader = exports.EndOfCentralDirectoryRecordToken = exports.DataDescriptor = void 0;


var _tokenTypes = require("token-types"); /**
 * Ref https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
 */const Signature = exports.Signature = { LocalFileHeader: 0x04034b50,
  DataDescriptor: 0x08074b50,
  CentralFileHeader: 0x02014b50,
  EndOfCentralDirectory: 0x06054b50
};
const DataDescriptor = exports.DataDescriptor = {
  get(array) {
    return {
      signature: _tokenTypes.UINT32_LE.get(array, 0),
      compressedSize: _tokenTypes.UINT32_LE.get(array, 8),
      uncompressedSize: _tokenTypes.UINT32_LE.get(array, 12)
    };
  }, len: 16
};
/**
 * First part of the ZIP Local File Header
 * Offset | Bytes| Description
 * -------|------+-------------------------------------------------------------------
 *      0 |    4 | Signature (0x04034b50)
 *      4 |    2 | Minimum version needed to extract
 *      6 |    2 | Bit flag
 *      8 |    2 | Compression method
 *     10 |    2 | File last modification time (MS-DOS format)
 *     12 |    2 | File last modification date (MS-DOS format)
 *     14 |    4 | CRC-32 of uncompressed data
 *     18 |    4 | Compressed size
 *     22 |    4 | Uncompressed size
 *     26 |    2 | File name length (n)
 *     28 |    2 | Extra field length (m)
 *     30 |    n | File name
 * 30 + n |    m | Extra field
 */
const LocalFileHeaderToken = exports.LocalFileHeaderToken = {
  get(array) {
    const flags = _tokenTypes.UINT16_LE.get(array, 6);
    return {
      signature: _tokenTypes.UINT32_LE.get(array, 0),
      minVersion: _tokenTypes.UINT16_LE.get(array, 4),
      dataDescriptor: !!(flags & 0x0008),
      compressedMethod: _tokenTypes.UINT16_LE.get(array, 8),
      compressedSize: _tokenTypes.UINT32_LE.get(array, 18),
      uncompressedSize: _tokenTypes.UINT32_LE.get(array, 22),
      filenameLength: _tokenTypes.UINT16_LE.get(array, 26),
      extraFieldLength: _tokenTypes.UINT16_LE.get(array, 28),
      filename: null
    };
  }, len: 30
};
/**
 * 4.3.16  End of central directory record:
 *  end of central dir signature (0x06064b50)                                      4 bytes
 *  number of this disk                                                            2 bytes
 *  number of the disk with the start of the central directory                     2 bytes
 *  total number of entries in the central directory on this disk                  2 bytes
 *  total number of entries in the size of the central directory                   2 bytes
 *  sizeOfTheCentralDirectory                                                      4 bytes
 *  offset of start of central directory with respect to the starting disk number  4 bytes
 *  .ZIP file comment length                                                       2 bytes
 *  .ZIP file comment       (variable size)
 */
const EndOfCentralDirectoryRecordToken = exports.EndOfCentralDirectoryRecordToken = {
  get(array) {
    return {
      signature: _tokenTypes.UINT32_LE.get(array, 0),
      nrOfThisDisk: _tokenTypes.UINT16_LE.get(array, 4),
      nrOfThisDiskWithTheStart: _tokenTypes.UINT16_LE.get(array, 6),
      nrOfEntriesOnThisDisk: _tokenTypes.UINT16_LE.get(array, 8),
      nrOfEntriesOfSize: _tokenTypes.UINT16_LE.get(array, 10),
      sizeOfCd: _tokenTypes.UINT32_LE.get(array, 12),
      offsetOfStartOfCd: _tokenTypes.UINT32_LE.get(array, 16),
      zipFileCommentLength: _tokenTypes.UINT16_LE.get(array, 20)
    };
  }, len: 22
};
/**
 * File header:
 *    central file header signature   4 bytes   0 (0x02014b50)
 *    version made by                 2 bytes   4
 *    version needed to extract       2 bytes   6
 *    general purpose bit flag        2 bytes   8
 *    compression method              2 bytes  10
 *    last mod file time              2 bytes  12
 *    last mod file date              2 bytes  14
 *    crc-32                          4 bytes  16
 *    compressed size                 4 bytes  20
 *    uncompressed size               4 bytes  24
 *    file name length                2 bytes  28
 *    extra field length              2 bytes  30
 *    file comment length             2 bytes  32
 *    disk number start               2 bytes  34
 *    internal file attributes        2 bytes  36
 *    external file attributes        4 bytes  38
 *    relative offset of local header 4 bytes  42
 */
const FileHeader = exports.FileHeader = {
  get(array) {
    const flags = _tokenTypes.UINT16_LE.get(array, 8);
    return {
      signature: _tokenTypes.UINT32_LE.get(array, 0),
      minVersion: _tokenTypes.UINT16_LE.get(array, 6),
      dataDescriptor: !!(flags & 0x0008),
      compressedMethod: _tokenTypes.UINT16_LE.get(array, 10),
      compressedSize: _tokenTypes.UINT32_LE.get(array, 20),
      uncompressedSize: _tokenTypes.UINT32_LE.get(array, 24),
      filenameLength: _tokenTypes.UINT16_LE.get(array, 28),
      extraFieldLength: _tokenTypes.UINT16_LE.get(array, 30),
      fileCommentLength: _tokenTypes.UINT16_LE.get(array, 32),
      relativeOffsetOfLocalHeader: _tokenTypes.UINT32_LE.get(array, 42),
      filename: null
    };
  }, len: 46
}; /* v9-e76d57dda44e31d0 */