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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 syntax = "proto2"; | 5 syntax = "proto2"; |
6 | 6 |
7 option optimize_for = LITE_RUNTIME; | 7 option optimize_for = LITE_RUNTIME; |
8 option retain_unknown_fields = true; | 8 option retain_unknown_fields = true; |
9 | 9 |
10 package attachment_store_pb; | 10 package attachment_store_pb; |
11 | 11 |
12 // Metadata for leveldb attachment store database. | 12 // Metadata for leveldb attachment store database. |
13 message StoreMetadata { | 13 message StoreMetadata { |
14 // |schema_version| indicates format in which data is written in attachment | 14 // |schema_version| indicates format in which data is written in attachment |
15 // store. Needed for upgrade and to prevent newer data from being loaded by | 15 // store. Needed for upgrade and to prevent newer data from being loaded by |
16 // older code that doesn't understand it. | 16 // older code that doesn't understand it. |
17 optional int32 schema_version = 1; | 17 optional int32 schema_version = 1; |
18 } | 18 } |
19 | 19 |
20 // Metadata for attachment in attachment store. Storing metadata in separate | 20 // Metadata for attachment in attachment store. Storing metadata in separate |
21 // record from actual data allows us to enumerate attachments in the store | 21 // record from actual data allows us to enumerate attachments in the store |
22 // without incurring cost to read actual data. It also allows us to update | 22 // without incurring cost to read actual data. It also allows us to update |
23 // attachment metadata independent of the data. | 23 // attachment metadata independent of the data. |
24 message RecordMetadata { | 24 message RecordMetadata { |
25 // Size of attachment data. Useful for attachment store space management. | 25 // Size of attachment data. Useful for attachment store space management. |
26 optional int64 attachment_size = 1; | 26 optional int64 attachment_size = 1; |
27 // Crc of attachment data. | |
maniscalco
2014/11/11 00:44:54
Crc -> crc32c
pavely
2014/11/11 22:27:15
Done.
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28 optional fixed32 crc32c = 2; | |
maniscalco
2014/11/11 00:44:54
Why use fixed32? I would have expected uint32.
pavely
2014/11/11 22:27:15
Protobuf language guide says that fixed32 "Always
maniscalco
2014/11/11 23:05:32
Wow, so many integral types! Looks like uint32 is
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27 } | 29 } |
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