1 /*
2 * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "test/explicit_key_value_config.h"
12
13 #include "api/transport/webrtc_key_value_config.h"
14 #include "rtc_base/checks.h"
15 #include "system_wrappers/include/field_trial.h"
16
17 namespace webrtc {
18 namespace test {
19
ExplicitKeyValueConfig(const std::string & s)20 ExplicitKeyValueConfig::ExplicitKeyValueConfig(const std::string& s) {
21 std::string::size_type field_start = 0;
22 while (field_start < s.size()) {
23 std::string::size_type separator_pos = s.find('/', field_start);
24 RTC_CHECK_NE(separator_pos, std::string::npos)
25 << "Missing separator '/' after field trial key.";
26 RTC_CHECK_GT(separator_pos, field_start)
27 << "Field trial key cannot be empty.";
28 std::string key = s.substr(field_start, separator_pos - field_start);
29 field_start = separator_pos + 1;
30
31 RTC_CHECK_LT(field_start, s.size())
32 << "Missing value after field trial key. String ended.";
33 separator_pos = s.find('/', field_start);
34 RTC_CHECK_NE(separator_pos, std::string::npos)
35 << "Missing terminating '/' in field trial string.";
36 RTC_CHECK_GT(separator_pos, field_start)
37 << "Field trial value cannot be empty.";
38 std::string value = s.substr(field_start, separator_pos - field_start);
39 field_start = separator_pos + 1;
40
41 key_value_map_[key] = value;
42 }
43 // This check is technically redundant due to earlier checks.
44 // We nevertheless keep the check to make it clear that the entire
45 // string has been processed, and without indexing past the end.
46 RTC_CHECK_EQ(field_start, s.size());
47 }
48
Lookup(absl::string_view key) const49 std::string ExplicitKeyValueConfig::Lookup(absl::string_view key) const {
50 auto it = key_value_map_.find(std::string(key));
51 if (it != key_value_map_.end())
52 return it->second;
53 return "";
54 }
55
56 } // namespace test
57 } // namespace webrtc
58