OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_DELTA_DIFF_GENERATOR_H__ |
| 6 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_DELTA_DIFF_GENERATOR_H__ |
| 7 |
| 8 #include <sys/types.h> |
| 9 #include <sys/stat.h> |
| 10 #include <string> |
| 11 #include <vector> |
| 12 #include "base/basictypes.h" |
| 13 #include "update_engine/file_writer.h" |
| 14 #include "update_engine/update_metadata.pb.h" |
| 15 |
| 16 namespace chromeos_update_engine { |
| 17 |
| 18 class DeltaDiffGenerator { |
| 19 public: |
| 20 // Encodes the metadata at new_path recursively into a DeltaArchiveManifest |
| 21 // protobuf object. This will only read the filesystem. Children will |
| 22 // be recorded recursively iff they are on the same device as their |
| 23 // parent. |
| 24 // This will set all fields in the DeltaArchiveManifest except for |
| 25 // DeltaArchiveManifest_File_data_* as those are set only when writing |
| 26 // the actual delta file to disk. |
| 27 // Caller is responsible for freeing the returned value. |
| 28 // Returns NULL on failure. |
| 29 static DeltaArchiveManifest* EncodeMetadataToProtoBuffer( |
| 30 const char* new_path); |
| 31 |
| 32 // Takes a DeltaArchiveManifest as given from EncodeMetadataToProtoBuffer(), |
| 33 // fill in the missing fields (DeltaArchiveManifest_File_data_*), and |
| 34 // write the full delta out to the output file. |
| 35 // Returns true on success. |
| 36 static bool EncodeDataToDeltaFile(DeltaArchiveManifest* archive, |
| 37 const std::string& old_path, |
| 38 const std::string& new_path, |
| 39 const std::string& out_file); |
| 40 private: |
| 41 // These functions encode all the data about a file that's not already |
| 42 // stored in the DeltaArchiveManifest message into the vector 'out'. |
| 43 // They all return true on success. |
| 44 |
| 45 // EncodeLink stores the path the symlink points to. |
| 46 static bool EncodeLink(const std::string& path, std::vector<char>* out); |
| 47 // EncodeDev stores the major and minor device numbers. |
| 48 // Specifically it writes a LinuxDevice message. |
| 49 static bool EncodeDev(const struct stat& stbuf, std::vector<char>* out); |
| 50 // EncodeFile stores the full data, gzipped data, or a binary diff from |
| 51 // the old data. out_data_format will be set to the method used. |
| 52 static bool EncodeFile(const std::string& old_dir, |
| 53 const std::string& new_dir, |
| 54 const std::string& file_name, |
| 55 DeltaArchiveManifest_File_DataFormat* out_data_format, |
| 56 std::vector<char>* out); |
| 57 |
| 58 static bool WriteFileDiffsToDeltaFile(DeltaArchiveManifest* archive, |
| 59 DeltaArchiveManifest_File* file, |
| 60 const std::string& file_name, |
| 61 const std::string& old_path, |
| 62 const std::string& new_path, |
| 63 FileWriter* out_file_writer, |
| 64 int* out_file_length); |
| 65 |
| 66 // This should never be constructed |
| 67 DISALLOW_IMPLICIT_CONSTRUCTORS(DeltaDiffGenerator); |
| 68 }; |
| 69 |
| 70 }; // namespace chromeos_update_engine |
| 71 |
| 72 #endif // CHROMEOS_PLATFORM_UPDATE_ENGINE_DELTA_DIFF_GENERATOR_H__ |
OLD | NEW |