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1 // Copyright 2016 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 STORAGE_BROWSER_BLOB_BLOB_SLICE_H_ | |
6 #define STORAGE_BROWSER_BLOB_BLOB_SLICE_H_ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include <string> | |
11 #include <vector> | |
12 | |
13 #include "base/macros.h" | |
14 #include "storage/browser/blob/internal_blob_data.h" | |
15 #include "storage/browser/blob/shareable_blob_data_item.h" | |
16 | |
17 namespace storage { | |
18 | |
19 class BlobSlice { | |
20 public: | |
21 BlobSlice(); | |
22 BlobSlice(const InternalBlobData& source, | |
23 uint64_t offset, | |
24 uint64_t size, | |
25 bool done_building); | |
26 BlobSlice(BlobSlice&&); | |
27 ~BlobSlice(); | |
28 | |
29 bool done_building() { return done_building_; } | |
30 | |
31 size_t copying_memory_size() { return copying_memory_size_; } | |
32 | |
33 // If our first item is a new memory item, where we are a slice of the item | |
34 // in the original blob. See first_item_slice_offset() and first_item_index(). | |
35 bool has_sliced_first_memory_item() { return has_sliced_first_memory_item_; } | |
michaeln
2016/07/07 20:05:21
the names of these members confused me at first, t
| |
36 // If our last item is a new memory item, where we are a slice of the item | |
37 // in the original blob. | |
38 bool has_sliced_last_memory_item() { return has_sliced_last_memory_item_; } | |
39 | |
40 size_t first_item_slice_offset() { return first_item_slice_offset_; } | |
41 size_t first_item_index() { return first_item_index_; } | |
42 size_t last_item_index() { return last_item_index_; } | |
43 | |
44 const std::vector<scoped_refptr<ShareableBlobDataItem>>& items() { | |
45 return items_; | |
46 } | |
47 | |
48 private: | |
49 void BinarySearch(const InternalBlobData& source_blob, | |
50 uint64_t blob_offset, | |
51 size_t* item_index, | |
52 uint64_t* offset_in_item); | |
53 | |
54 size_t copying_memory_size_ = 0; | |
55 bool done_building_ = true; | |
56 | |
57 bool has_sliced_first_memory_item_ = false; | |
58 bool has_sliced_last_memory_item_ = false; | |
59 size_t first_item_slice_offset_ = 0; | |
60 size_t first_item_index_ = 0; | |
61 size_t last_item_index_ = 0; | |
62 | |
63 std::vector<scoped_refptr<ShareableBlobDataItem>> items_; | |
64 | |
65 DISALLOW_COPY_AND_ASSIGN(BlobSlice); | |
66 }; | |
67 | |
68 } // namespace storage | |
69 #endif // STORAGE_BROWSER_BLOB_BLOB_SLICE_H_ | |
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