1 /*
2 * Copyright (C) 2019 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 ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_
18 #define ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_
19
20 #include <string_view>
21
22 namespace art {
23
24 // When this code is only compiled on C++20+, these wrappers can be removed and
25 // calling code changed to call the string_view methods directly.
26
StartsWith(std::string_view sv,std::string_view prefix)27 inline bool StartsWith(std::string_view sv, std::string_view prefix) {
28 #if !defined(__cpp_lib_starts_ends_with) || __cpp_lib_starts_ends_with < 201711L
29 return sv.substr(0u, prefix.size()) == prefix;
30 #else
31 return sv.starts_with(prefix);
32 #endif
33 }
34
EndsWith(std::string_view sv,std::string_view suffix)35 inline bool EndsWith(std::string_view sv, std::string_view suffix) {
36 #if !defined(__cpp_lib_starts_ends_with) || __cpp_lib_starts_ends_with < 201711L
37 return sv.size() >= suffix.size() && sv.substr(sv.size() - suffix.size()) == suffix;
38 #else
39 return sv.ends_with(suffix);
40 #endif
41 }
42
43 } // namespace art
44
45 #endif // ART_LIBARTBASE_BASE_STRING_VIEW_CPP20_H_
46