1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBZIPARCHIVE_ZIPARCHIVE_PRIVATE_H_ 18 #define LIBZIPARCHIVE_ZIPARCHIVE_PRIVATE_H_ 19 20 #include <stdint.h> 21 #include <stdlib.h> 22 #include <unistd.h> 23 24 #include <utils/FileMap.h> 25 #include <ziparchive/zip_archive.h> 26 27 struct ZipArchive { 28 // open Zip archive 29 const int fd; 30 const bool close_file; 31 32 // mapped central directory area 33 off64_t directory_offset; 34 android::FileMap directory_map; 35 36 // number of entries in the Zip archive 37 uint16_t num_entries; 38 39 // We know how many entries are in the Zip archive, so we can have a 40 // fixed-size hash table. We define a load factor of 0.75 and over 41 // allocate so the maximum number entries can never be higher than 42 // ((4 * UINT16_MAX) / 3 + 1) which can safely fit into a uint32_t. 43 uint32_t hash_table_size; 44 ZipString* hash_table; 45 ZipArchiveZipArchive46 ZipArchive(const int fd, bool assume_ownership) : 47 fd(fd), 48 close_file(assume_ownership), 49 directory_offset(0), 50 num_entries(0), 51 hash_table_size(0), 52 hash_table(NULL) {} 53 ~ZipArchiveZipArchive54 ~ZipArchive() { 55 if (close_file && fd >= 0) { 56 close(fd); 57 } 58 59 free(hash_table); 60 } 61 }; 62 63 #endif // LIBZIPARCHIVE_ZIPARCHIVE_PRIVATE_H_ 64