1 /*
2 * Copyright (C) 2017 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 #ifndef ANDROIDFW_RESOURCEUTILS_H
18 #define ANDROIDFW_RESOURCEUTILS_H
19
20 #include "androidfw/StringPiece.h"
21
22 namespace android {
23
24 // Extracts the package, type, and name from a string of the format: [[package:]type/]name
25 // Validation must be performed on each extracted piece.
26 // Returns false if there was a syntax error.
27 bool ExtractResourceName(const StringPiece& str, StringPiece* out_package, StringPiece* out_type,
28 StringPiece* out_entry);
29
fix_package_id(uint32_t resid,uint8_t package_id)30 inline uint32_t fix_package_id(uint32_t resid, uint8_t package_id) {
31 return (resid & 0x00ffffffu) | (static_cast<uint32_t>(package_id) << 24);
32 }
33
get_package_id(uint32_t resid)34 inline uint8_t get_package_id(uint32_t resid) {
35 return static_cast<uint8_t>((resid >> 24) & 0x000000ffu);
36 }
37
38 // The type ID is 1-based, so if the returned value is 0 it is invalid.
get_type_id(uint32_t resid)39 inline uint8_t get_type_id(uint32_t resid) {
40 return static_cast<uint8_t>((resid >> 16) & 0x000000ffu);
41 }
42
get_entry_id(uint32_t resid)43 inline uint16_t get_entry_id(uint32_t resid) {
44 return static_cast<uint16_t>(resid & 0x0000ffffu);
45 }
46
is_internal_resid(uint32_t resid)47 inline bool is_internal_resid(uint32_t resid) {
48 return (resid & 0xffff0000u) != 0 && (resid & 0x00ff0000u) == 0;
49 }
50
is_valid_resid(uint32_t resid)51 inline bool is_valid_resid(uint32_t resid) {
52 return (resid & 0x00ff0000u) != 0 && (resid & 0xff000000u) != 0;
53 }
54
make_resid(uint8_t package_id,uint8_t type_id,uint16_t entry_id)55 inline uint32_t make_resid(uint8_t package_id, uint8_t type_id, uint16_t entry_id) {
56 return (static_cast<uint32_t>(package_id) << 24) | (static_cast<uint32_t>(type_id) << 16) |
57 entry_id;
58 }
59
60 } // namespace android
61
62 #endif /* ANDROIDFW_RESOURCEUTILS_H */
63