1 /*
2 * Copyright 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 #include "config.h"
17
18 #include <android-base/file.h>
19 #include <android-base/logging.h>
20 #include <android-base/parseint.h>
21 #include <android-base/strings.h>
22
23 using namespace ::std;
24 using namespace ::android::base;
25
26 namespace {
27
parseBytesString(std::string in,std::vector<uint8_t> & out)28 bool parseBytesString(std::string in, std::vector<uint8_t>& out) {
29 vector<string> values = Split(in, ":");
30 if (values.size() == 0) return false;
31 for (string value : values) {
32 if (value.length() != 2) return false;
33 uint8_t tmp = 0;
34 string hexified = "0x";
35 hexified.append(value);
36 if (!ParseUint(hexified.c_str(), &tmp)) return false;
37 out.push_back(tmp);
38 }
39 return true;
40 }
41
42 } // namespace
43
getType() const44 ConfigValue::Type ConfigValue::getType() const { return type_; }
45
getString() const46 std::string ConfigValue::getString() const {
47 CHECK(type_ == STRING);
48 return value_string_;
49 };
50
getUnsigned() const51 unsigned ConfigValue::getUnsigned() const {
52 CHECK(type_ == UNSIGNED);
53 return value_unsigned_;
54 };
55
getBytes() const56 std::vector<uint8_t> ConfigValue::getBytes() const {
57 CHECK(type_ == BYTES);
58 return value_bytes_;
59 };
60
parseFromString(std::string in)61 bool ConfigValue::parseFromString(std::string in) {
62 if (in.length() > 1 && in[0] == '"' && in[in.length() - 1] == '"') {
63 CHECK(in.length() > 2); // Don't allow empty strings
64 type_ = STRING;
65 value_string_ = in.substr(1, in.length() - 2);
66 return true;
67 }
68
69 if (in.length() > 1 && in[0] == '{' && in[in.length() - 1] == '}') {
70 CHECK(in.length() >= 4); // Needs at least one byte
71 type_ = BYTES;
72 return parseBytesString(in.substr(1, in.length() - 2), value_bytes_);
73 }
74
75 unsigned tmp = 0;
76 if (ParseUint(in.c_str(), &tmp)) {
77 type_ = UNSIGNED;
78 value_unsigned_ = tmp;
79 return true;
80 }
81
82 return false;
83 }
84
parseFromFile(const std::string & file_name)85 void ConfigFile::parseFromFile(const std::string& file_name) {
86 string config;
87 bool config_read = ReadFileToString(file_name, &config);
88 CHECK(config_read);
89 LOG(INFO) << "ConfigFile - Parsing file '" << file_name << "'";
90 parseFromString(config);
91 }
92
parseFromString(const std::string & config)93 void ConfigFile::parseFromString(const std::string& config) {
94 stringstream ss(config);
95 string line;
96 while (getline(ss, line)) {
97 line = Trim(line);
98 if (line.empty()) continue;
99 if (line.at(0) == '#') continue;
100 if (line.at(0) == 0) continue;
101
102 auto search = line.find('=');
103 CHECK(search != string::npos);
104
105 string key(Trim(line.substr(0, search)));
106 string value_string(Trim(line.substr(search + 1, string::npos)));
107
108 ConfigValue value;
109 bool value_parsed = value.parseFromString(value_string);
110 CHECK(value_parsed);
111 CHECK(!hasKey(key));
112 values_.emplace(key, value);
113
114 LOG(INFO) << "ConfigFile - [" << key << "] = " << value_string;
115 }
116 }
117
hasKey(const std::string & key)118 bool ConfigFile::hasKey(const std::string& key) {
119 return values_.count(key) != 0;
120 }
121
getValue(const std::string & key)122 ConfigValue& ConfigFile::getValue(const std::string& key) {
123 auto search = values_.find(key);
124 CHECK(search != values_.end());
125 return search->second;
126 }
127
getString(const std::string & key)128 std::string ConfigFile::getString(const std::string& key) {
129 return getValue(key).getString();
130 }
131
getUnsigned(const std::string & key)132 unsigned ConfigFile::getUnsigned(const std::string& key) {
133 return getValue(key).getUnsigned();
134 }
135
getBytes(const std::string & key)136 std::vector<uint8_t> ConfigFile::getBytes(const std::string& key) {
137 return getValue(key).getBytes();
138 }
139
clear()140 void ConfigFile::clear() { values_.clear(); }
141