blob: ca8749b4e1f48e23a8bb90f14d07a257fc28e688 [file] [log] [blame]
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "update_engine/prefs.h"
#include <base/files/file_util.h>
#include <base/logging.h>
#include <base/strings/string_number_conversions.h>
#include <base/strings/string_util.h>
#include "update_engine/utils.h"
using std::string;
namespace chromeos_update_engine {
bool Prefs::Init(const base::FilePath& prefs_dir) {
prefs_dir_ = prefs_dir;
return true;
}
bool Prefs::GetString(const string& key, string* value) {
base::FilePath filename;
TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
if (!base::ReadFileToString(filename, value)) {
LOG(INFO) << key << " not present in " << prefs_dir_.value();
return false;
}
return true;
}
bool Prefs::SetString(const std::string& key, const std::string& value) {
base::FilePath filename;
TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
TEST_AND_RETURN_FALSE(base::CreateDirectory(filename.DirName()));
TEST_AND_RETURN_FALSE(base::WriteFile(filename, value.data(), value.size()) ==
static_cast<int>(value.size()));
return true;
}
bool Prefs::GetInt64(const string& key, int64_t* value) {
string str_value;
if (!GetString(key, &str_value))
return false;
base::TrimWhitespaceASCII(str_value, base::TRIM_ALL, &str_value);
TEST_AND_RETURN_FALSE(base::StringToInt64(str_value, value));
return true;
}
bool Prefs::SetInt64(const string& key, const int64_t value) {
return SetString(key, base::Int64ToString(value));
}
bool Prefs::GetBoolean(const std::string& key, bool* value) {
string str_value;
if (!GetString(key, &str_value))
return false;
base::TrimWhitespaceASCII(str_value, base::TRIM_ALL, &str_value);
if (str_value == "false") {
*value = false;
return true;
}
if (str_value == "true") {
*value = true;
return true;
}
return false;
}
bool Prefs::SetBoolean(const std::string& key, const bool value) {
return SetString(key, value ? "true" : "false");
}
bool Prefs::Exists(const string& key) {
base::FilePath filename;
TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
return base::PathExists(filename);
}
bool Prefs::Delete(const string& key) {
base::FilePath filename;
TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
return base::DeleteFile(filename, false);
}
bool Prefs::GetFileNameForKey(const std::string& key,
base::FilePath* filename) {
// Allows only non-empty keys containing [A-Za-z0-9_-].
TEST_AND_RETURN_FALSE(!key.empty());
for (size_t i = 0; i < key.size(); ++i) {
char c = key.at(i);
TEST_AND_RETURN_FALSE(IsAsciiAlpha(c) || IsAsciiDigit(c) ||
c == '_' || c == '-');
}
*filename = prefs_dir_.Append(key);
return true;
}
} // namespace chromeos_update_engine