node-hk-zip/build/main/lib/ZipByteMap.js

UNZIP implementation for NodeJS

"use strict";
/**
 *  @fileOverview Definition ZIP file bit/byte order
 */
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * LocalFileHeader byte/bit map
 * @constant
 *
 * @type {ILocalFileByteMap}
 */
exports.LOCAL_FILE_HEADER_MAP = {
    SIZE: 30,
    SIGNATURE: 0x04034b50,
    VERSION: 4,
    GENERAL_BIT_FLAG: 6,
    COMPRESSION_METHOD: 8,
    MODIFICATION_TIME: 10,
    MODIFICATION_DATE: 12,
    CRC: 14,
    COMPRESSED_SIZE: 18,
    UNCOMPRESSED_SIZE: 22,
    FILENAME_LENGTH: 26,
    EXTRA_FIELD_LENGTH: 28 // Extra field length
};
/**
 * DataDescriptorHeader byte/bit map
 * @constant
 *
 * @type {IDataDescriptorByteMap}
 */
exports.DATA_DESCRIPTOR_MAP = {
    SIZE: 16,
    SIGNATURE: 0x08074b50,
    CRC: 4,
    COMPRESSED_SIZE: 8,
    UNCOMPRESSED_SIZE: 12 // Uncompressed size
};
/**
 * CentralDirectoryHeader byte/bit map
 * @constant
 *
 * @type {ICentralDirByteMap}
 */
exports.CENTRAL_DIR_MAP = {
    SIZE: 46,
    SIGNATURE: 0x02014b50,
    VERSION_MADE: 4,
    VERSION_EXTRACT: 6,
    FLAGS: 8,
    METHOD: 10,
    TIME: 12,
    DATE: 14,
    CRC: 16,
    COMPRESSED_SIZE: 20,
    DECOMPRESSED_SIZE: 24,
    FILENAME_LENGTH: 28,
    EXTRA_FIELD_LENGTH: 30,
    COMMENT_LENGTH: 32,
    DISK_START: 34,
    INTERNAL_ATTRIBUTES: 36,
    EXTERNAL_ATTRIBUTES: 38,
    OFFSET: 42 // Relative offset of local header
};
/**
 * EndOfCentralDirectoryHeader byte/bit map
 * @constant
 *
 * @type {IEndOfCentralDirByteMap}
 */
exports.END_OF_CENTRAL_DIR_MAP = {
    SIZE: 22,
    SIGNATURE: 0x06054b50,
    NUMBER_OF_ENTRIES: 8,
    TOTAL_NUMBER_OF_ENTRIES: 10,
    CENTRAL_DIR_SIZE: 12,
    CENTRAL_DIR_OFFSET: 16,
    COMMENT_LENGTH: 20 // Zip file comment length
};
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