1 /*
2 * Copyright 2025 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /**
18 * Compatibility wrapper for [android.sysprop.BackportedFixesProperties].
19 */
20 @file:JvmName("BackportedFixesPropertiesCompat")
21
22 package com.android.cts.backportedfixes.support
23
24 private const val ALIAS_BITSET_PROP_NAME = "ro.build.backported_fixes.alias_bitset.long_list"
25
26 // TODO: b/308461809 use androidx library when available
27
28 /**
29 *
30 * BitSet where the index of the bits are aliases for known issues that are backported and fixed on
31 * the device.
32 *
33 * Encoded as a long array containing a little-endian representation of a sequence of bits
34 * as defined by [java.util.BitSet.valueOf].
35 *
36 * The list 10,9 means alias 1,4,64 and 67 are fixed on this device.
37 */
38 @get:JvmName("alias_bitset")
39 val alias_bitset: List<Long>
40 get() {
41 // TODO: b/308461809 - use BackportedFixesProperties.alias_bitset() when available.
42 return aliasBitset()
43 }
44
aliasBitsetnull45 private fun aliasBitset(): List<Long> {
46 return parseLongListString(getAliasBitsetString())
47 }
48
parseLongListStringnull49 private fun parseLongListString(s: String): List<Long> {
50 val list = buildList {
51 for (x in s.split(',')) {
52 try {
53 val l = x.toLong()
54 add(l)
55 } catch (_: NumberFormatException) {
56 // Since the order matters, stop and just return what we have.
57 break
58 }
59 }
60 }
61 return list
62 }
63
getAliasBitsetStringnull64 private fun getAliasBitsetString(): String {
65 try {
66 val c = Class.forName("android.os.SystemProperties")
67 val get = c.getMethod("get", String::class.java, String::class.java)
68
69 return get.invoke(c, ALIAS_BITSET_PROP_NAME, "") as String
70 } catch (e: Exception) {
71 return ""
72 }
73 }
74