1 /*
2  * Copyright (C) 2015, 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 #include "import_resolver.h"
18 
19 #include <unistd.h>
20 
21 #ifdef _WIN32
22 #include <io.h>
23 #endif
24 
25 #include "os.h"
26 
27 using std::string;
28 using std::vector;
29 
30 namespace android {
31 namespace aidl {
32 
ImportResolver(const IoDelegate & io_delegate,const vector<string> & import_paths)33 ImportResolver::ImportResolver(const IoDelegate& io_delegate,
34                                const vector<string>& import_paths)
35     : io_delegate_(io_delegate) {
36   for (string path : import_paths) {
37     if (path.empty()) {
38       path = ".";
39     }
40     if (path[path.size() - 1] != OS_PATH_SEPARATOR) {
41       path += OS_PATH_SEPARATOR;
42     }
43     import_paths_.push_back(std::move(path));
44   }
45 }
46 
47 
FindImportFile(const string & canonical_name) const48 string ImportResolver::FindImportFile(const string& canonical_name) const {
49   // Convert the canonical name to a relative file path.
50   string relative_path = canonical_name;
51   for (char& c : relative_path) {
52     if (c == '.') {
53       c = OS_PATH_SEPARATOR;
54     }
55   }
56   relative_path += ".aidl";
57 
58   // Look for that relative path at each of our import roots.
59   for (string path : import_paths_) {
60     path = path + relative_path;
61     if (io_delegate_.FileIsReadable(path)) {
62       return path;
63     }
64   }
65 
66   return "";
67 }
68 
69 }  // namespace android
70 }  // namespace aidl
71