base/guid.cc

   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 "base/guid.h"
   6
   7 #include "base/strings/string_util.h"
   8
   9 namespace base {
  10
  11 bool IsValidGUID(const std::string& guid) {
  12   const size_t kGUIDLength = 36U;
  13   if (guid.length() != kGUIDLength)
  14     return false;
  15
  16   for (size_t i = 0; i < guid.length(); ++i) {
  17     char current = guid[i];
  18     if (i == 8 || i == 13 || i == 18 || i == 23) {
  19       if (current != '-')
  20         return false;
  21     } else {
  22       if (!IsHexDigit(current))
  23         return false;
  24     }
  25   }
  26
  27   return true;
  28 }
  29
  30 }  // namespace base