1 /*
2  * Copyright (C) 2022 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 package com.android.server.permission.access.collection
18 
19 inline fun <T> List<T>.allIndexed(predicate: (Int, T) -> Boolean): Boolean {
20     forEachIndexed { index, element ->
21         if (!predicate(index, element)) {
22             return false
23         }
24     }
25     return true
26 }
27 
28 inline fun <T> List<T>.anyIndexed(predicate: (Int, T) -> Boolean): Boolean {
29     forEachIndexed { index, element ->
30         if (predicate(index, element)) {
31             return true
32         }
33     }
34     return false
35 }
36 
37 inline fun <T> List<T>.forEachIndexed(action: (Int, T) -> Unit) {
38     for (index in indices) {
39         action(index, this[index])
40     }
41 }
42 
43 inline fun <T> List<T>.forEachReversedIndexed(action: (Int, T) -> Unit) {
44     for (index in lastIndex downTo 0) {
45         action(index, this[index])
46     }
47 }
48 
49 inline fun <T> List<T>.noneIndexed(predicate: (Int, T) -> Boolean): Boolean {
50     forEachIndexed { index, element ->
51         if (predicate(index, element)) {
52             return false
53         }
54     }
55     return true
56 }
57 
58 inline fun <T> MutableList<T>.removeAllIndexed(predicate: (Int, T) -> Boolean): Boolean {
59     var isChanged = false
60     forEachReversedIndexed { index, element ->
61         if (predicate(index, element)) {
62             removeAt(index)
63             isChanged = true
64         }
65     }
66     return isChanged
67 }
68 
69 inline fun <T> MutableList<T>.retainAllIndexed(predicate: (Int, T) -> Boolean): Boolean {
70     var isChanged = false
71     forEachReversedIndexed { index, element ->
72         if (!predicate(index, element)) {
73             removeAt(index)
74             isChanged = true
75         }
76     }
77     return isChanged
78 }
79