File: metrics_util.cc

package info (click to toggle)
chromium-browser 41.0.2272.118-1
  • links: PTS, VCS
  • area: main
  • in suites: jessie-kfreebsd
  • size: 2,189,132 kB
  • sloc: cpp: 9,691,462; ansic: 3,341,451; python: 712,689; asm: 518,779; xml: 208,926; java: 169,820; sh: 119,353; perl: 68,907; makefile: 28,311; yacc: 13,305; objc: 11,385; tcl: 3,186; cs: 2,225; sql: 2,217; lex: 2,215; lisp: 1,349; pascal: 1,256; awk: 407; ruby: 155; sed: 53; php: 14; exp: 11
file content (27 lines) | stat: -rw-r--r-- 846 bytes parent folder | download 
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
 
// 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.

#include "components/variations/metrics_util.h"

#include "base/sha1.h"
#include "base/sys_byteorder.h"

namespace metrics {

uint32 HashName(const std::string& name) {
  // SHA-1 is designed to produce a uniformly random spread in its output space,
  // even for nearly-identical inputs.
  unsigned char sha1_hash[base::kSHA1Length];
  base::SHA1HashBytes(reinterpret_cast<const unsigned char*>(name.c_str()),
                      name.size(),
                      sha1_hash);

  uint32 bits;
  static_assert(sizeof(bits) < sizeof(sha1_hash), "more data required");
  memcpy(&bits, sha1_hash, sizeof(bits));

  return base::ByteSwapToLE32(bits);
}

}  // namespace metrics