rhubarb-lip-sync/lib/webrtc-8d2248ff/webrtc/base/optionsfile.cc

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2016-06-21 20:13:05 +00:00
/*
* Copyright 2008 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 "webrtc/base/optionsfile.h"
#include <ctype.h>
#include "webrtc/base/logging.h"
#include "webrtc/base/stream.h"
#include "webrtc/base/stringencode.h"
namespace rtc {
OptionsFile::OptionsFile(const std::string &path) : path_(path) {
}
OptionsFile::~OptionsFile() = default;
bool OptionsFile::Load() {
options_.clear();
// Open file.
FileStream stream;
int err;
if (!stream.Open(path_, "r", &err)) {
LOG_F(LS_WARNING) << "Could not open file, err=" << err;
// We do not consider this an error because we expect there to be no file
// until the user saves a setting.
return true;
}
// Read in all its data.
std::string line;
StreamResult res;
for (;;) {
res = stream.ReadLine(&line);
if (res != SR_SUCCESS) {
break;
}
size_t equals_pos = line.find('=');
if (equals_pos == std::string::npos) {
// We do not consider this an error. Instead we ignore the line and
// keep going.
LOG_F(LS_WARNING) << "Ignoring malformed line in " << path_;
continue;
}
std::string key(line, 0, equals_pos);
std::string value(line, equals_pos + 1, line.length() - (equals_pos + 1));
options_[key] = value;
}
if (res != SR_EOS) {
LOG_F(LS_ERROR) << "Error when reading from file";
return false;
} else {
return true;
}
}
bool OptionsFile::Save() {
// Open file.
FileStream stream;
int err;
if (!stream.Open(path_, "w", &err)) {
LOG_F(LS_ERROR) << "Could not open file, err=" << err;
return false;
}
// Write out all the data.
StreamResult res = SR_SUCCESS;
size_t written;
int error;
for (OptionsMap::const_iterator i = options_.begin(); i != options_.end();
++i) {
res = stream.WriteAll(i->first.c_str(), i->first.length(), &written,
&error);
if (res != SR_SUCCESS) {
break;
}
res = stream.WriteAll("=", 1, &written, &error);
if (res != SR_SUCCESS) {
break;
}
res = stream.WriteAll(i->second.c_str(), i->second.length(), &written,
&error);
if (res != SR_SUCCESS) {
break;
}
res = stream.WriteAll("\n", 1, &written, &error);
if (res != SR_SUCCESS) {
break;
}
}
if (res != SR_SUCCESS) {
LOG_F(LS_ERROR) << "Unable to write to file";
return false;
} else {
return true;
}
}
bool OptionsFile::IsLegalName(const std::string &name) {
for (size_t pos = 0; pos < name.length(); ++pos) {
if (name[pos] == '\n' || name[pos] == '\\' || name[pos] == '=') {
// Illegal character.
LOG(LS_WARNING) << "Ignoring operation for illegal option " << name;
return false;
}
}
return true;
}
bool OptionsFile::IsLegalValue(const std::string &value) {
for (size_t pos = 0; pos < value.length(); ++pos) {
if (value[pos] == '\n' || value[pos] == '\\') {
// Illegal character.
LOG(LS_WARNING) << "Ignoring operation for illegal value " << value;
return false;
}
}
return true;
}
bool OptionsFile::GetStringValue(const std::string& option,
std::string *out_val) const {
LOG(LS_VERBOSE) << "OptionsFile::GetStringValue "
<< option;
if (!IsLegalName(option)) {
return false;
}
OptionsMap::const_iterator i = options_.find(option);
if (i == options_.end()) {
return false;
}
*out_val = i->second;
return true;
}
bool OptionsFile::GetIntValue(const std::string& option,
int *out_val) const {
LOG(LS_VERBOSE) << "OptionsFile::GetIntValue "
<< option;
if (!IsLegalName(option)) {
return false;
}
OptionsMap::const_iterator i = options_.find(option);
if (i == options_.end()) {
return false;
}
return FromString(i->second, out_val);
}
bool OptionsFile::SetStringValue(const std::string& option,
const std::string& value) {
LOG(LS_VERBOSE) << "OptionsFile::SetStringValue "
<< option << ":" << value;
if (!IsLegalName(option) || !IsLegalValue(value)) {
return false;
}
options_[option] = value;
return true;
}
bool OptionsFile::SetIntValue(const std::string& option,
int value) {
LOG(LS_VERBOSE) << "OptionsFile::SetIntValue "
<< option << ":" << value;
if (!IsLegalName(option)) {
return false;
}
return ToString(value, &options_[option]);
}
bool OptionsFile::RemoveValue(const std::string& option) {
LOG(LS_VERBOSE) << "OptionsFile::RemoveValue " << option;
if (!IsLegalName(option)) {
return false;
}
options_.erase(option);
return true;
}
} // namespace rtc