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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <array>
#include <cstddef>
#include <cstring>
#include <limits>
#include <span>
#include <zlib.h>
#include "common/settings.h"
#include "common/settings_enums.h"
#include "common/string_util.h"
#include "common/swap.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/vfs/vfs.h"
namespace FileSys {
const std::array<const char*, size_t(Language::Count)> LANGUAGE_NAMES{{
"AmericanEnglish",
"BritishEnglish",
"Japanese",
"French",
"German",
"LatinAmericanSpanish",
"Spanish",
"Italian",
"Dutch",
"CanadianFrench",
"Portuguese",
"Russian",
"Korean",
"TraditionalChinese",
"SimplifiedChinese",
"BrazilianPortuguese",
"Polish",
"Thai",
}};
namespace
{
constexpr std::size_t MAX_EXPANDED_LANG_SIZE = sizeof(LanguageEntry) * 32;
bool InflateRawDeflate(std::span<const u8> compressed, std::vector<u8>& out)
{
if (compressed.empty()) return false;
z_stream stream{};
stream.next_in = const_cast<Bytef*>(reinterpret_cast<const Bytef*>(compressed.data()));
stream.avail_in = static_cast<uInt>(compressed.size());
if (inflateInit2(&stream, -MAX_WBITS) != Z_OK) {
return false;
}
out.resize(MAX_EXPANDED_LANG_SIZE);
stream.next_out = reinterpret_cast<Bytef*>(out.data());
stream.avail_out = static_cast<uInt>(out.size());
int ret = inflate(&stream, Z_FINISH);
inflateEnd(&stream);
if (ret != Z_STREAM_END && ret != Z_OK) {
return false;
}
// Shrink to actual decompressed size
out.resize(stream.total_out);
return true;
}
} // namespace
std::string LanguageEntry::GetApplicationName() const {
return Common::StringFromFixedZeroTerminatedBuffer(application_name.data(), application_name.size());
}
std::string LanguageEntry::GetDeveloperName() const {
return Common::StringFromFixedZeroTerminatedBuffer(developer_name.data(), developer_name.size());
}
NACP::NACP() = default;
NACP::NACP(VirtualFile file)
{
file->ReadObject(&raw);
if (raw.titles_data_format == TitleDataFormat::Compressed) {
const u16 compressed_size = raw.language_entries.compressed_data.buffer_size;
std::span<const u8> compressed_payload{raw.language_entries.compressed_data.buffer,
compressed_size};
std::vector<u8> decompressed;
if (InflateRawDeflate(compressed_payload, decompressed)) {
const size_t entry_count = decompressed.size() / sizeof(LanguageEntry);
language_entries.resize(entry_count);
std::memcpy(language_entries.data(), decompressed.data(), decompressed.size());
}
} else {
language_entries.resize(16);
std::memcpy(language_entries.data(), raw.language_entries.language_entries.data(),
sizeof(raw.language_entries.language_entries));
}
}
NACP::~NACP() = default;
const LanguageEntry& NACP::GetLanguageEntry() const {
u32 index = static_cast<u32>(Settings::values.language_index.GetValue());
if (index < language_entries.size() && !language_entries[index].GetApplicationName().empty()) {
return language_entries[index];
}
for (const auto& entry : language_entries) {
if (!entry.GetApplicationName().empty())
return entry;
}
return language_entries.at(static_cast<u8>(Language::AmericanEnglish));
}
std::vector<std::string> NACP::GetApplicationNames() const {
std::vector<std::string> names;
names.reserve(language_entries.size());
for (const auto& entry : language_entries) {
names.push_back(entry.GetApplicationName());
}
return names;
}
std::string NACP::GetApplicationName() const {
return GetLanguageEntry().GetApplicationName();
}
std::string NACP::GetDeveloperName() const {
return GetLanguageEntry().GetDeveloperName();
}
u64 NACP::GetTitleId() const {
return raw.save_data_owner_id;
}
u64 NACP::GetDLCBaseTitleId() const {
return raw.dlc_base_title_id;
}
std::string NACP::GetVersionString() const {
return Common::StringFromFixedZeroTerminatedBuffer(raw.version_string.data(),
raw.version_string.size());
}
u64 NACP::GetDefaultNormalSaveSize() const {
return raw.user_account_save_data_size;
}
u64 NACP::GetDefaultJournalSaveSize() const {
return raw.user_account_save_data_journal_size;
}
bool NACP::GetUserAccountSwitchLock() const {
return raw.user_account_switch_lock != 0;
}
u32 NACP::GetSupportedLanguages() const {
return u32(raw.supported_languages);
}
u64 NACP::GetDeviceSaveDataSize() const {
return raw.device_save_data_size;
}
u32 NACP::GetParentalControlFlag() const {
return raw.parental_control;
}
const std::array<u8, 0x20>& NACP::GetRatingAge() const {
return raw.rating_age;
}
std::vector<u8> NACP::GetRawBytes() const {
std::vector<u8> out(sizeof(RawNACP));
std::memcpy(out.data(), &raw, sizeof(RawNACP));
return out;
}
} // namespace FileSys
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