blob: d18c94b8f1a84da8a30dabcfe2e5efa025592a8c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SYNC_ENGINE_BUILD_COMMIT_COMMAND_H_
#define SYNC_ENGINE_BUILD_COMMIT_COMMAND_H_
#pragma once
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "sync/engine/syncer_command.h"
#include "sync/engine/syncproto.h"
#include "sync/syncable/syncable.h"
namespace browser_sync {
class BuildCommitCommand : public SyncerCommand {
public:
BuildCommitCommand();
virtual ~BuildCommitCommand();
// SyncerCommand implementation.
virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
private:
FRIEND_TEST_ALL_PREFIXES(BuildCommitCommandTest, InterpolatePosition);
// Functions returning constants controlling range of values.
static int64 GetFirstPosition();
static int64 GetLastPosition();
static int64 GetGap();
void AddExtensionsActivityToMessage(sessions::SyncSession* session,
CommitMessage* message);
// Helper for computing position. Find the numeric position value
// of the closest already-synced entry. |direction| must be one of
// NEXT_ID or PREV_ID; this parameter controls the search direction.
// For an open range (no predecessor or successor), the return
// value will be kFirstPosition or kLastPosition.
int64 FindAnchorPosition(syncable::IdField direction,
const syncable::Entry& entry);
// Given two values of the type returned by FindAnchorPosition,
// compute a third value in between the two ranges.
int64 InterpolatePosition(int64 lo, int64 hi);
DISALLOW_COPY_AND_ASSIGN(BuildCommitCommand);
};
} // namespace browser_sync
#endif // SYNC_ENGINE_BUILD_COMMIT_COMMAND_H_
|
