1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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/variations/metrics_util.h"
6
7#include "base/sha1.h"
8#include "base/sys_byteorder.h"
9
10namespace metrics {
11
12uint32 HashName(const std::string& name) {
13  // SHA-1 is designed to produce a uniformly random spread in its output space,
14  // even for nearly-identical inputs.
15  unsigned char sha1_hash[base::kSHA1Length];
16  base::SHA1HashBytes(reinterpret_cast<const unsigned char*>(name.c_str()),
17                      name.size(),
18                      sha1_hash);
19
20  uint32 bits;
21  COMPILE_ASSERT(sizeof(bits) < sizeof(sha1_hash), need_more_data);
22  memcpy(&bits, sha1_hash, sizeof(bits));
23
24  return base::ByteSwapToLE32(bits);
25}
26
27}  // namespace metrics
28