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/*
* libjingle
* Copyright 2008, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/base/optionsfile.h"
#include <ctype.h>
#include "talk/base/logging.h"
#include "talk/base/stream.h"
#include "talk/base/stringencode.h"
namespace talk_base {
OptionsFile::OptionsFile(const std::string &path) : path_(path) {
}
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 talk_base
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