OLD | NEW |
---|---|
(Empty) | |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
Ilya Sherman
2014/02/14 05:23:10
nit: Ditto.
Steven Holte
2014/02/14 23:01:08
Done.
| |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "components/metrics/metrics_util.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "base/md5.h" | |
9 #include "base/sys_byteorder.h" | |
10 | |
11 namespace metrics { | |
12 | |
13 namespace { | |
14 | |
15 // Converts the 8-byte prefix of an MD5 hash into a uint64 value. | |
16 inline uint64 HashToUInt64(const std::string& hash) { | |
17 uint64 value; | |
18 DCHECK_GE(hash.size(), sizeof(value)); | |
19 memcpy(&value, hash.data(), sizeof(value)); | |
20 return base::HostToNet64(value); | |
21 } | |
22 | |
23 } // namespace | |
24 | |
25 uint64 HashMetricName(const std::string& name) { | |
26 // Create an MD5 hash of the given |name|, represented as a byte buffer | |
27 // encoded as an std::string. | |
28 base::MD5Context context; | |
29 base::MD5Init(&context); | |
30 base::MD5Update(&context, name); | |
31 | |
32 base::MD5Digest digest; | |
33 base::MD5Final(&digest, &context); | |
34 | |
35 std::string hash_str(reinterpret_cast<char*>(digest.a), arraysize(digest.a)); | |
36 return HashToUInt64(hash_str); | |
37 } | |
38 | |
39 } // namespace metrics | |
OLD | NEW |