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// Copyright 2012 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
// Thanks to Treeki for writing the original class - 29/01/2012
#include "Common/SettingsHandler.h"
#include <cstddef>
#include <ctime>
#include <iomanip>
#include <string>
#include <fmt/chrono.h>
#include "Common/CommonTypes.h"
namespace Common
{
SettingsHandler::SettingsHandler()
{
Reset();
}
SettingsHandler::SettingsHandler(Buffer&& buffer)
{
SetBytes(std::move(buffer));
}
const SettingsHandler::Buffer& SettingsHandler::GetBytes() const
{
return m_buffer;
}
void SettingsHandler::SetBytes(Buffer&& buffer)
{
Reset();
m_buffer = std::move(buffer);
Decrypt();
}
std::string SettingsHandler::GetValue(std::string_view key) const
{
constexpr char delim[] = "\r\n";
std::string toFind = std::string(delim).append(key).append("=");
size_t found = decoded.find(toFind);
if (found != std::string_view::npos)
{
size_t delimFound = decoded.find(delim, found + toFind.length());
if (delimFound == std::string_view::npos)
delimFound = decoded.length() - 1;
return decoded.substr(found + toFind.length(), delimFound - (found + toFind.length()));
}
else
{
toFind = std::string(key).append("=");
found = decoded.find(toFind);
if (found == 0)
{
size_t delimFound = decoded.find(delim, found + toFind.length());
if (delimFound == std::string_view::npos)
delimFound = decoded.length() - 1;
return decoded.substr(found + toFind.length(), delimFound - (found + toFind.length()));
}
}
return "";
}
void SettingsHandler::Decrypt()
{
const u8* str = m_buffer.data();
while (*str != 0)
{
if (m_position >= m_buffer.size())
return;
decoded.push_back((u8)(m_buffer[m_position] ^ m_key));
m_position++;
str++;
m_key = (m_key >> 31) | (m_key << 1);
}
}
void SettingsHandler::Reset()
{
decoded = "";
m_position = 0;
m_key = INITIAL_SEED;
m_buffer = {};
}
void SettingsHandler::AddSetting(std::string_view key, std::string_view value)
{
for (const char& c : key)
{
WriteByte(c);
}
WriteByte('=');
for (const char& c : value)
{
WriteByte(c);
}
WriteByte(13);
WriteByte(10);
}
void SettingsHandler::WriteByte(u8 b)
{
if (m_position >= m_buffer.size())
return;
m_buffer[m_position] = b ^ m_key;
m_position++;
m_key = (m_key >> 31) | (m_key << 1);
}
std::string SettingsHandler::GenerateSerialNumber()
{
const std::time_t t = std::time(nullptr);
// Must be 9 characters at most; otherwise the serial number will be rejected by SDK libraries,
// as there is a check to ensure the string length is strictly lower than 10.
// 3 for %j, 2 for %H, 2 for %M, 2 for %S.
return fmt::format("{:%j%H%M%S}", *std::localtime(&t));
}
} // namespace Common
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