1// Copyright (c) 2010 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 "chrome/common/guid.h"
6
7#include "base/rand_util.h"
8#include "base/stringprintf.h"
9
10namespace guid {
11
12bool IsValidGUID(const std::string& guid) {
13  const size_t kGUIDLength = 36U;
14  if (guid.length() != kGUIDLength)
15    return false;
16
17  std::string hexchars = "0123456789ABCDEF";
18  for (uint32 i = 0; i < guid.length(); ++i) {
19    char current = guid[i];
20    if (i == 8 || i == 13 || i == 18 || i == 23) {
21      if (current != '-')
22        return false;
23    } else {
24      if (hexchars.find(current) == std::string::npos)
25        return false;
26    }
27  }
28
29  return true;
30}
31
32}  // namespace guid
33