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/rand_util.h"
   8 #include "base/stringprintf.h"
   9
  10 namespace base {
  11
  12 bool 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