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// Copyright 2014 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_API_ATTACHMENTS_ATTACHMENT_ID_H_
#define SYNC_API_ATTACHMENTS_ATTACHMENT_ID_H_
#include <set>
#include <string>
#include <vector>
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/util/immutable.h"
namespace sync_pb {
class AttachmentIdProto;
} // namespace sync_pb
namespace syncer {
// Uniquely identifies an attachment.
//
// Two attachments with equal (operator==) AttachmentIds are considered
// equivalent.
class SYNC_EXPORT AttachmentId {
public:
~AttachmentId();
// Default copy and assignment are welcome.
bool operator==(const AttachmentId& other) const;
bool operator!=(const AttachmentId& other) const;
// Needed for using AttachmentId as key in std::map.
bool operator<(const AttachmentId& other) const;
// Creates a unique id for an attachment.
//
// |size| is the attachment's size in bytes.
//
// |crc32c| is the attachment's crc32c.
static AttachmentId Create(size_t size, uint32_t crc32c);
// Creates an attachment id from an initialized proto.
static AttachmentId CreateFromProto(const sync_pb::AttachmentIdProto& proto);
const sync_pb::AttachmentIdProto& GetProto() const;
// Returns the size (in bytes) the attachment.
size_t GetSize() const;
// Returns the crc32c the attachment.
uint32_t GetCrc32c() const;
private:
// Necessary since we forward-declare sync_pb::AttachmentIdProto; see comments
// in immutable.h.
struct SYNC_EXPORT ImmutableAttachmentIdProtoTraits {
typedef sync_pb::AttachmentIdProto* Wrapper;
static void InitializeWrapper(Wrapper* wrapper);
static void DestroyWrapper(Wrapper* wrapper);
static const sync_pb::AttachmentIdProto& Unwrap(const Wrapper& wrapper);
static sync_pb::AttachmentIdProto* UnwrapMutable(Wrapper* wrapper);
static void Swap(sync_pb::AttachmentIdProto* t1,
sync_pb::AttachmentIdProto* t2);
};
typedef Immutable<sync_pb::AttachmentIdProto,
ImmutableAttachmentIdProtoTraits>
ImmutableAttachmentIdProto;
ImmutableAttachmentIdProto proto_;
AttachmentId(sync_pb::AttachmentIdProto* proto);
};
typedef std::vector<AttachmentId> AttachmentIdList;
typedef std::set<AttachmentId> AttachmentIdSet;
} // namespace syncer
#endif // SYNC_API_ATTACHMENTS_ATTACHMENT_ID_H_
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