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1 // Copyright (c) 2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2008 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 | 4 |
5 // DataPack represents a read-only view onto an on-disk file that contains | 5 // DataPack represents a read-only view onto an on-disk file that contains |
6 // (key, value) pairs of data. It's used to store static resources like | 6 // (key, value) pairs of data. It's used to store static resources like |
7 // translation strings and images. | 7 // translation strings and images. |
8 | 8 |
9 #ifndef BASE_DATA_PACK_H_ | 9 #ifndef BASE_DATA_PACK_H_ |
10 #define BASE_DATA_PACK_H_ | 10 #define BASE_DATA_PACK_H_ |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
13 #include "base/scoped_ptr.h" | 13 #include "base/scoped_ptr.h" |
14 | 14 |
15 namespace file_util { | 15 namespace file_util { |
16 class MemoryMappedFile; | 16 class MemoryMappedFile; |
17 } | 17 } |
18 class FilePath; | 18 class FilePath; |
19 class StringPiece; | |
20 | 19 |
21 namespace base { | 20 namespace base { |
22 | 21 |
| 22 class StringPiece; |
| 23 |
23 class DataPack { | 24 class DataPack { |
24 public: | 25 public: |
25 DataPack(); | 26 DataPack(); |
26 ~DataPack(); | 27 ~DataPack(); |
27 | 28 |
28 // Load a pack file from |path|, returning false on error. | 29 // Load a pack file from |path|, returning false on error. |
29 bool Load(const FilePath& path); | 30 bool Load(const FilePath& path); |
30 | 31 |
31 // Get resource by id |resource_id|, filling in |data|. | 32 // Get resource by id |resource_id|, filling in |data|. |
32 // The data is owned by the DataPack object and should not be modified. | 33 // The data is owned by the DataPack object and should not be modified. |
33 // Returns false if the resource id isn't found. | 34 // Returns false if the resource id isn't found. |
34 bool Get(uint32_t resource_id, StringPiece* data); | 35 bool Get(uint32_t resource_id, StringPiece* data); |
35 | 36 |
36 private: | 37 private: |
37 // The memory-mapped data. | 38 // The memory-mapped data. |
38 scoped_ptr<file_util::MemoryMappedFile> mmap_; | 39 scoped_ptr<file_util::MemoryMappedFile> mmap_; |
39 | 40 |
40 // Number of resources in the data. | 41 // Number of resources in the data. |
41 size_t resource_count_; | 42 size_t resource_count_; |
42 | 43 |
43 DISALLOW_COPY_AND_ASSIGN(DataPack); | 44 DISALLOW_COPY_AND_ASSIGN(DataPack); |
44 }; | 45 }; |
45 | 46 |
46 } // namespace base | 47 } // namespace base |
47 | 48 |
48 #endif // BASE_DATA_PACK_H_ | 49 #endif // BASE_DATA_PACK_H_ |
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