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      1 // Copyright 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/ios/ios_util.h"
      6 
      7 #include "base/sys_info.h"
      8 
      9 namespace {
     10 // Return a 3 elements array containing the major, minor and bug fix version of
     11 // the OS.
     12 const int32* OSVersionAsArray() {
     13   int32* digits = new int32[3];
     14   base::SysInfo::OperatingSystemVersionNumbers(
     15       &digits[0], &digits[1], &digits[2]);
     16   return digits;
     17 }
     18 }  // namespace
     19 
     20 namespace base {
     21 namespace ios {
     22 
     23 bool IsRunningOnIOS7OrLater() {
     24   return IsRunningOnOrLater(7, 0, 0);
     25 }
     26 
     27 bool IsRunningOnOrLater(int32 major, int32 minor, int32 bug_fix) {
     28   static const int32* current_version = OSVersionAsArray();
     29   int32 version[] = { major, minor, bug_fix };
     30   for (size_t i = 0; i < arraysize(version); i++) {
     31     if (current_version[i] != version[i])
     32       return current_version[i] > version[i];
     33   }
     34   return true;
     35 }
     36 
     37 }  // namespace ios
     38 }  // namespace base
     39