webrtc/system_wrappers/source/field_trial.cc
Yves Gerey 988cc0870b [Cleanup] Add missing #include. Remove useless ones.
This CL is the result of running include-what-you-use tool on part
of the code base (audio target and dependencies) plus manual fixes.

bug: webrtc:8311
Change-Id: I277d281ce943c3ecc1bd45fd8d83055931743604
Reviewed-on: https://webrtc-review.googlesource.com/c/106280
Commit-Queue: Yves Gerey <yvesg@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25311}
2018-10-23 11:32:56 +00:00

67 lines
2.2 KiB
C++

// Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
//
#include "system_wrappers/include/field_trial.h"
#include <stddef.h>
#include <string>
// Simple field trial implementation, which allows client to
// specify desired flags in InitFieldTrialsFromString.
namespace webrtc {
namespace field_trial {
static const char* trials_init_string = NULL;
#ifndef WEBRTC_EXCLUDE_FIELD_TRIAL_DEFAULT
std::string FindFullName(const std::string& name) {
if (trials_init_string == NULL)
return std::string();
std::string trials_string(trials_init_string);
if (trials_string.empty())
return std::string();
static const char kPersistentStringSeparator = '/';
size_t next_item = 0;
while (next_item < trials_string.length()) {
// Find next name/value pair in field trial configuration string.
size_t field_name_end =
trials_string.find(kPersistentStringSeparator, next_item);
if (field_name_end == trials_string.npos || field_name_end == next_item)
break;
size_t field_value_end =
trials_string.find(kPersistentStringSeparator, field_name_end + 1);
if (field_value_end == trials_string.npos ||
field_value_end == field_name_end + 1)
break;
std::string field_name(trials_string, next_item,
field_name_end - next_item);
std::string field_value(trials_string, field_name_end + 1,
field_value_end - field_name_end - 1);
next_item = field_value_end + 1;
if (name == field_name)
return field_value;
}
return std::string();
}
#endif // WEBRTC_EXCLUDE_FIELD_TRIAL_DEFAULT
// Optionally initialize field trial from a string.
void InitFieldTrialsFromString(const char* trials_string) {
trials_init_string = trials_string;
}
const char* GetFieldTrialString() {
return trials_init_string;
}
} // namespace field_trial
} // namespace webrtc