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 ANDROID_VINTF_UTILS_H
18 #define ANDROID_VINTF_UTILS_H
19
20 #include <fstream>
21 #include <iostream>
22 #include <sstream>
23
24 #include <android-base/logging.h>
25 #include <utils/Errors.h>
26
27 #include "parse_xml.h"
28
29 namespace android {
30 namespace vintf {
31 namespace details {
32
33 // Return the file from the given location as a string.
34 //
35 // This class can be used to create a mock for overriding.
36 class FileFetcher {
37 public:
~FileFetcher()38 virtual ~FileFetcher() {}
fetch(const std::string & path,std::string & fetched)39 virtual status_t fetch(const std::string& path, std::string& fetched) {
40 std::ifstream in;
41
42 in.open(path);
43 if (!in.is_open()) {
44 LOG(WARNING) << "Cannot open " << path;
45 return INVALID_OPERATION;
46 }
47
48 std::stringstream ss;
49 ss << in.rdbuf();
50 fetched = ss.str();
51
52 return OK;
53 }
54 };
55
56 extern FileFetcher* gFetcher;
57
58 class PartitionMounter {
59 public:
~PartitionMounter()60 virtual ~PartitionMounter() {}
mountSystem()61 virtual status_t mountSystem() const { return OK; }
mountVendor()62 virtual status_t mountVendor() const { return OK; }
umountSystem()63 virtual status_t umountSystem() const { return OK; }
umountVendor()64 virtual status_t umountVendor() const { return OK; }
65 };
66
67 extern PartitionMounter* gPartitionMounter;
68
69 template <typename T>
fetchAllInformation(const std::string & path,const XmlConverter<T> & converter,T * outObject)70 status_t fetchAllInformation(const std::string& path, const XmlConverter<T>& converter,
71 T* outObject) {
72 std::string info;
73
74 if (gFetcher == nullptr) {
75 // Should never happen.
76 return NO_INIT;
77 }
78
79 status_t result = gFetcher->fetch(path, info);
80
81 if (result != OK) {
82 return result;
83 }
84
85 bool success = converter(outObject, info);
86 if (!success) {
87 LOG(ERROR) << "Illformed file: " << path << ": "
88 << converter.lastError();
89 return BAD_VALUE;
90 }
91 return OK;
92 }
93
94 } // namespace details
95 } // namespace vintf
96 } // namespace android
97
98
99
100 #endif
101