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 ART_RUNTIME_ZIP_ARCHIVE_H_ 18 #define ART_RUNTIME_ZIP_ARCHIVE_H_ 19 20 #include <stdint.h> 21 #include <memory> 22 #include <string> 23 24 #include <android-base/logging.h> 25 26 #include "base/os.h" 27 #include "base/safe_map.h" 28 #include "base/unix_file/random_access_file.h" 29 #include "globals.h" 30 #include "mem_map.h" 31 32 // system/core/zip_archive definitions. 33 struct ZipEntry; 34 typedef void* ZipArchiveHandle; 35 36 namespace art { 37 38 class ZipArchive; 39 class MemMap; 40 41 class ZipEntry { 42 public: 43 bool ExtractToFile(File& file, std::string* error_msg); 44 // Extract this entry to anonymous memory (R/W). 45 // Returns null on failure and sets error_msg. 46 MemMap* ExtractToMemMap(const char* zip_filename, const char* entry_filename, 47 std::string* error_msg); 48 // Create a file-backed private (clean, R/W) memory mapping to this entry. 49 // 'zip_filename' is used for diagnostics only, 50 // the original file that the ZipArchive was open with is used 51 // for the mapping. 52 // 53 // Will only succeed if the entry is stored uncompressed. 54 // Returns null on failure and sets error_msg. 55 MemMap* MapDirectlyFromFile(const char* zip_filename, /*out*/std::string* error_msg); 56 virtual ~ZipEntry(); 57 58 MemMap* MapDirectlyOrExtract(const char* zip_filename, 59 const char* entry_filename, 60 std::string* error_msg); 61 62 uint32_t GetUncompressedLength(); 63 uint32_t GetCrc32(); 64 65 bool IsUncompressed(); 66 bool IsAlignedTo(size_t alignment) const; 67 bool IsAlignedToDexHeader() const; 68 69 private: 70 ZipEntry(ZipArchiveHandle handle, 71 ::ZipEntry* zip_entry, 72 const std::string& entry_name) 73 : handle_(handle), zip_entry_(zip_entry), entry_name_(entry_name) {} 74 75 ZipArchiveHandle handle_; 76 ::ZipEntry* const zip_entry_; 77 std::string const entry_name_; 78 79 friend class ZipArchive; 80 DISALLOW_COPY_AND_ASSIGN(ZipEntry); 81 }; 82 83 class ZipArchive { 84 public: 85 // return new ZipArchive instance on success, null on error. 86 static ZipArchive* Open(const char* filename, std::string* error_msg); 87 static ZipArchive* OpenFromFd(int fd, const char* filename, std::string* error_msg); 88 89 ZipEntry* Find(const char* name, std::string* error_msg) const; 90 91 ~ZipArchive(); 92 93 private: 94 explicit ZipArchive(ZipArchiveHandle handle) : handle_(handle) {} 95 96 friend class ZipEntry; 97 98 ZipArchiveHandle handle_; 99 100 DISALLOW_COPY_AND_ASSIGN(ZipArchive); 101 }; 102 103 } // namespace art 104 105 #endif // ART_RUNTIME_ZIP_ARCHIVE_H_ 106
