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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 #ifndef THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ | 4 #ifndef THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ |
5 #define THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ | 5 #define THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <memory> | 10 #include <memory> |
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152 // | 152 // |
153 // Note that there is no CloseCurrentEntryInZip(). The the current entry | 153 // Note that there is no CloseCurrentEntryInZip(). The the current entry |
154 // state is reset automatically as needed. | 154 // state is reset automatically as needed. |
155 bool OpenCurrentEntryInZip(); | 155 bool OpenCurrentEntryInZip(); |
156 | 156 |
157 // Locates an entry in the zip file and opens it. Returns true on | 157 // Locates an entry in the zip file and opens it. Returns true on |
158 // success. This function internally calls OpenCurrentEntryInZip() on | 158 // success. This function internally calls OpenCurrentEntryInZip() on |
159 // success. On failure, current_entry_info() becomes NULL. | 159 // success. On failure, current_entry_info() becomes NULL. |
160 bool LocateAndOpenEntry(const base::FilePath& path_in_zip); | 160 bool LocateAndOpenEntry(const base::FilePath& path_in_zip); |
161 | 161 |
162 // Extracts the current entry in chunks to |delegate|. | 162 // Extracts entirety of the current entry in chunks to |delegate|. |
satorux1
2017/07/21 05:27:02
While you are at it, could you add documentation a
mortonm
2017/07/21 16:29:56
Done. Didn't add an explanation here, but there ar
| |
163 bool ExtractCurrentEntry(WriterDelegate* delegate) const; | 163 bool ExtractCurrentEntry(WriterDelegate* delegate) const; |
164 | 164 |
165 // Extracts |num_bytes_to_extract| bytes of the current entry to |delegate|, | |
166 // starting from the beginning of the entry. A negative value for | |
167 // |num_bytes_to_extract| means the entire current entry will be extracted. | |
168 // Returns false if |num_bytes_to_extract| is greater than file length. | |
169 bool ExtractFromBeginningOfCurrentEntry(WriterDelegate* delegate, | |
170 int64_t num_bytes_to_extract) const; | |
171 | |
165 // Extracts the current entry to the given output file path. If the | 172 // Extracts the current entry to the given output file path. If the |
166 // current file is a directory, just creates a directory | 173 // current file is a directory, just creates a directory |
167 // instead. Returns true on success. OpenCurrentEntryInZip() must be | 174 // instead. Returns true on success. OpenCurrentEntryInZip() must be |
168 // called beforehand. | 175 // called beforehand. |
169 // | 176 // |
170 // This function preserves the timestamp of the original entry. If that | 177 // This function preserves the timestamp of the original entry. If that |
171 // timestamp is not valid, the timestamp will be set to the current time. | 178 // timestamp is not valid, the timestamp will be set to the current time. |
172 bool ExtractCurrentEntryToFilePath( | 179 bool ExtractCurrentEntryToFilePath( |
173 const base::FilePath& output_file_path) const; | 180 const base::FilePath& output_file_path) const; |
174 | 181 |
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195 // | 202 // |
196 // This function preserves the timestamp of the original entry. If that | 203 // This function preserves the timestamp of the original entry. If that |
197 // timestamp is not valid, the timestamp will be set to the current time. | 204 // timestamp is not valid, the timestamp will be set to the current time. |
198 bool ExtractCurrentEntryIntoDirectory( | 205 bool ExtractCurrentEntryIntoDirectory( |
199 const base::FilePath& output_directory_path) const; | 206 const base::FilePath& output_directory_path) const; |
200 | 207 |
201 // Extracts the current entry by writing directly to a platform file. | 208 // Extracts the current entry by writing directly to a platform file. |
202 // Does not close the file. Returns true on success. | 209 // Does not close the file. Returns true on success. |
203 bool ExtractCurrentEntryToFile(base::File* file) const; | 210 bool ExtractCurrentEntryToFile(base::File* file) const; |
204 | 211 |
205 // Extracts the current entry into memory. If the current entry is a directory | 212 // Extracts the current entry into memory. If the current entry is a |
206 // the |output| parameter is set to the empty string. If the current entry is | 213 // directory, the |output| parameter is set to the empty string. If the |
207 // a file, the |output| parameter is filled with its contents. Returns true on | 214 // current entry is a file, the |output| parameter is filled with its |
208 // success. OpenCurrentEntryInZip() must be called beforehand. | 215 // contents. Returns true on success. OpenCurrentEntryInZip() must be called |
209 // Note: the |output| parameter can be filled with a big amount of data, avoid | 216 // beforehand. Note: the |output| parameter can be filled with a big amount of |
210 // passing it around by value, but by reference or pointer. | 217 // data, avoid passing it around by value, but by reference or pointer. Note: |
211 // Note: the value returned by EntryInfo::original_size() cannot be | 218 // the value returned by EntryInfo::original_size() cannot be trusted, so the |
212 // trusted, so the real size of the uncompressed contents can be different. | 219 // real size of the uncompressed contents can be different. Use |
213 // Use max_read_bytes to limit the ammount of memory used to carry the entry. | 220 // |max_read_bytes| to limit the ammount of memory used to carry the entry. If |
214 // If the real size of the uncompressed data is bigger than max_read_bytes | 221 // the real size of the uncompressed data is bigger than |max_read_bytes| then |
215 // then false is returned. |max_read_bytes| must be non-zero. | 222 // false is returned. |max_read_bytes| must be non-zero. |
216 bool ExtractCurrentEntryToString( | 223 bool ExtractCurrentEntryToString( |
217 size_t max_read_bytes, | 224 size_t max_read_bytes, |
218 std::string* output) const; | 225 std::string* output) const; |
219 | 226 |
227 // Same as ExtractCurrentEntryToString(), except specifies the number of bytes | |
228 // to read into the string so that it is possible to only read a partial | |
229 // amount of the entry into a string. If | |
230 // |read_entire_file|, returns true only if |num_bytes_to_extract| is at least | |
231 // the size of entire file. | |
232 bool ExtractFromBeginningOfCurrentEntryToString(size_t num_bytes_to_extract, | |
233 bool read_entire_file, | |
234 std::string* output) const; | |
235 | |
220 // Returns the current entry info. Returns NULL if the current entry is | 236 // Returns the current entry info. Returns NULL if the current entry is |
221 // not yet opened. OpenCurrentEntryInZip() must be called beforehand. | 237 // not yet opened. OpenCurrentEntryInZip() must be called beforehand. |
222 EntryInfo* current_entry_info() const { | 238 EntryInfo* current_entry_info() const { |
223 return current_entry_info_.get(); | 239 return current_entry_info_.get(); |
224 } | 240 } |
225 | 241 |
226 // Returns the number of entries in the zip file. | 242 // Returns the number of entries in the zip file. |
227 // Open() must be called beforehand. | 243 // Open() must be called beforehand. |
228 int num_entries() const { return num_entries_; } | 244 int num_entries() const { return num_entries_; } |
229 | 245 |
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272 private: | 288 private: |
273 base::File* file_; | 289 base::File* file_; |
274 int64_t file_length_; | 290 int64_t file_length_; |
275 | 291 |
276 DISALLOW_COPY_AND_ASSIGN(FileWriterDelegate); | 292 DISALLOW_COPY_AND_ASSIGN(FileWriterDelegate); |
277 }; | 293 }; |
278 | 294 |
279 } // namespace zip | 295 } // namespace zip |
280 | 296 |
281 #endif // THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ | 297 #endif // THIRD_PARTY_ZLIB_GOOGLE_ZIP_READER_H_ |
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