1 /*
2  *
3  * Copyright 2017 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef GRPC_CORE_LIB_GPRPP_MAP_H
20 #define GRPC_CORE_LIB_GPRPP_MAP_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include <string.h>
25 
26 #include <map>
27 
28 #include "absl/strings/string_view.h"
29 
30 #include "src/core/lib/gprpp/memory.h"
31 
32 namespace grpc_core {
33 
34 struct StringLess {
operatorStringLess35   bool operator()(const char* a, const char* b) const {
36     return strcmp(a, b) < 0;
37   }
operatorStringLess38   bool operator()(const grpc_core::UniquePtr<char>& a,
39                   const grpc_core::UniquePtr<char>& b) const {
40     return strcmp(a.get(), b.get()) < 0;
41   }
operatorStringLess42   bool operator()(const absl::string_view& a,
43                   const absl::string_view& b) const {
44     const size_t min_size = std::min(a.size(), b.size());
45     int c = strncmp(a.data(), b.data(), min_size);
46     if (c != 0) return c < 0;
47     return a.size() < b.size();
48   }
49 };
50 
51 }  // namespace grpc_core
52 
53 #endif /* GRPC_CORE_LIB_GPRPP_MAP_H */
54