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Side by Side Diff: sync/internal_api/public/base/node_ordinal.h

Issue 11624037: [sync] Componentize sync: Part 6: Add more SYNC_EXPORTs to files in src/sync/ (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Rebase (no code changes) Created 7 years, 11 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright 2012 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 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_ 5 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_
6 #define SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_ 6 #define SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "sync/base/sync_export.h"
9 #include "sync/internal_api/public/base/ordinal.h" 10 #include "sync/internal_api/public/base/ordinal.h"
10 11
11 namespace syncer { 12 namespace syncer {
12 13
13 // A NodeOrdinal is an Ordinal whose internal value comes from the 14 // A NodeOrdinal is an Ordinal whose internal value comes from the
14 // ordinal_in_parent field of SyncEntity (see sync.proto). It uses 15 // ordinal_in_parent field of SyncEntity (see sync.proto). It uses
15 // the entire uint8 range for backwards compatibility with the old 16 // the entire uint8 range for backwards compatibility with the old
16 // int64-based positioning. 17 // int64-based positioning.
17 18
18 struct NodeOrdinalTraits { 19 struct NodeOrdinalTraits {
(...skipping 16 matching lines...) Expand all
35 NodeOrdinalHasCorrectMidDigitValue); 36 NodeOrdinalHasCorrectMidDigitValue);
36 COMPILE_ASSERT(NodeOrdinal::kMaxDigitValue == 255, 37 COMPILE_ASSERT(NodeOrdinal::kMaxDigitValue == 255,
37 NodeOrdinalHasCorrectMaxDigitValue); 38 NodeOrdinalHasCorrectMaxDigitValue);
38 COMPILE_ASSERT(NodeOrdinal::kRadix == 256, 39 COMPILE_ASSERT(NodeOrdinal::kRadix == 256,
39 NodeOrdinalHasCorrectRadix); 40 NodeOrdinalHasCorrectRadix);
40 41
41 // Converts an int64 position (usually from the position_in_parent 42 // Converts an int64 position (usually from the position_in_parent
42 // field of SyncEntity) to a NodeOrdinal. This transformation 43 // field of SyncEntity) to a NodeOrdinal. This transformation
43 // preserves the ordering relation: a < b under integer ordering if 44 // preserves the ordering relation: a < b under integer ordering if
44 // and only if Int64ToNodeOrdinal(a) < Int64ToNodeOrdinal(b). 45 // and only if Int64ToNodeOrdinal(a) < Int64ToNodeOrdinal(b).
45 NodeOrdinal Int64ToNodeOrdinal(int64 x); 46 SYNC_EXPORT_PRIVATE NodeOrdinal Int64ToNodeOrdinal(int64 x);
46 47
47 // The inverse of Int64ToNodeOrdinal. This conversion is, in general, 48 // The inverse of Int64ToNodeOrdinal. This conversion is, in general,
48 // lossy: NodeOrdinals can have arbitrary fidelity, while numeric 49 // lossy: NodeOrdinals can have arbitrary fidelity, while numeric
49 // positions contain only 64 bits of information (in fact, this is the 50 // positions contain only 64 bits of information (in fact, this is the
50 // reason we've moved away from them). 51 // reason we've moved away from them).
51 int64 NodeOrdinalToInt64(const NodeOrdinal& ordinal); 52 SYNC_EXPORT_PRIVATE int64 NodeOrdinalToInt64(const NodeOrdinal& ordinal);
52 53
53 } // namespace syncer 54 } // namespace syncer
54 55
55 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_ 56 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_NODE_ORDINAL_H_
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