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 10 namespace guid { 11 IsValidGUID(const std::string & guid)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