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1// Copyright 2012 The Chromium Authors
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 "partition_alloc/partition_alloc_base/ios/ios_util.h"
6
7#include <array>
8
9#include "partition_alloc/partition_alloc_base/system/sys_info.h"
10
11namespace partition_alloc::internal::base::ios {
12
13bool IsRunningOnIOS12OrLater() {
14  static const bool is_running_on_or_later = IsRunningOnOrLater(12, 0, 0);
15  return is_running_on_or_later;
16}
17
18bool IsRunningOnIOS13OrLater() {
19  static const bool is_running_on_or_later = IsRunningOnOrLater(13, 0, 0);
20  return is_running_on_or_later;
21}
22
23bool IsRunningOnIOS14OrLater() {
24  static const bool is_running_on_or_later = IsRunningOnOrLater(14, 0, 0);
25  return is_running_on_or_later;
26}
27
28bool IsRunningOnIOS15OrLater() {
29  static const bool is_running_on_or_later = IsRunningOnOrLater(15, 0, 0);
30  return is_running_on_or_later;
31}
32
33bool IsRunningOnOrLater(int32_t major, int32_t minor, int32_t bug_fix) {
34  static const class OSVersion {
35   public:
36    OSVersion() {
37      SysInfo::OperatingSystemVersionNumbers(
38          &current_version_[0], &current_version_[1], &current_version_[2]);
39    }
40
41    bool IsRunningOnOrLater(int32_t version[3]) const {
42      for (size_t i = 0; i < std::size(current_version_); ++i) {
43        if (current_version_[i] != version[i]) {
44          return current_version_[i] > version[i];
45        }
46      }
47      return true;
48    }
49
50   private:
51    int32_t current_version_[3];
52  } kOSVersion;
53
54  int32_t version[3] = {major, minor, bug_fix};
55  return kOSVersion.IsRunningOnOrLater(version);
56}
57
58}  // namespace partition_alloc::internal::base::ios
59