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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/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*, 16> LANGUAGE_NAMES{{
"AmericanEnglish",
"BritishEnglish",
"Japanese",
"French",
"German",
"LatinAmericanSpanish",
"Spanish",
"Italian",
"Dutch",
"CanadianFrench",
"Portuguese",
"Russian",
"Korean",
"TraditionalChinese",
"SimplifiedChinese",
"BrazilianPortuguese",
}};
namespace {
constexpr std::size_t LEGACY_LANGUAGE_REGION_SIZE = sizeof(std::array<LanguageEntry, 16>);
constexpr std::size_t PACKED_LANGUAGE_REGION_MAX_SIZE = sizeof(LanguageEntry) * 32;
bool InflateRawDeflate(std::span<const u8> compressed, std::vector<u8>& out) {
if (compressed.empty() || compressed.size() > std::numeric_limits<uInt>::max()) {
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;
}
std::array<u8, 0x1000> chunk{};
int ret = Z_OK;
while (ret == Z_OK) {
stream.next_out = reinterpret_cast<Bytef*>(chunk.data());
stream.avail_out = static_cast<uInt>(chunk.size());
ret = inflate(&stream, Z_NO_FLUSH);
if (ret != Z_OK && ret != Z_STREAM_END) {
inflateEnd(&stream);
return false;
}
const auto produced = chunk.size() - static_cast<std::size_t>(stream.avail_out);
if (produced != 0) {
if (out.size() + produced > PACKED_LANGUAGE_REGION_MAX_SIZE) {
inflateEnd(&stream);
return false;
}
out.insert(out.end(), chunk.begin(),
chunk.begin() + static_cast<std::ptrdiff_t>(produced));
}
}
inflateEnd(&stream);
return ret == Z_STREAM_END;
}
void DecodePackedLanguageEntries(RawNACP& raw) {
auto* packed_region = reinterpret_cast<u8*>(raw.language_entries.data());
u16_le compressed_size_le{};
std::memcpy(&compressed_size_le, packed_region, sizeof(compressed_size_le));
const auto compressed_size = static_cast<std::size_t>(compressed_size_le);
if (compressed_size == 0 || compressed_size > LEGACY_LANGUAGE_REGION_SIZE - sizeof(u16_le)) {
return;
}
std::vector<u8> decompressed;
if (!InflateRawDeflate(
std::span<const u8>(packed_region + sizeof(u16_le), compressed_size), decompressed)) {
return;
}
if (decompressed.size() < LEGACY_LANGUAGE_REGION_SIZE ||
decompressed.size() % sizeof(LanguageEntry) != 0) {
return;
}
std::memcpy(raw.language_entries.data(), decompressed.data(), LEGACY_LANGUAGE_REGION_SIZE);
}
} // 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());
}
constexpr std::array<Language, 18> language_to_codes = {{
Language::Japanese,
Language::AmericanEnglish,
Language::French,
Language::German,
Language::Italian,
Language::Spanish,
Language::SimplifiedChinese,
Language::Korean,
Language::Dutch,
Language::Portuguese,
Language::Russian,
Language::TraditionalChinese,
Language::BritishEnglish,
Language::CanadianFrench,
Language::LatinAmericanSpanish,
Language::SimplifiedChinese,
Language::TraditionalChinese,
Language::BrazilianPortuguese,
}};
NACP::NACP() = default;
NACP::NACP(VirtualFile file) {
file->ReadObject(&raw);
DecodePackedLanguageEntries(raw);
}
NACP::~NACP() = default;
const LanguageEntry& NACP::GetLanguageEntry() const {
Language language =
language_to_codes[static_cast<s32>(Settings::values.language_index.GetValue())];
{
const auto& language_entry = raw.language_entries.at(static_cast<u8>(language));
if (!language_entry.GetApplicationName().empty())
return language_entry;
}
for (const auto& language_entry : raw.language_entries) {
if (!language_entry.GetApplicationName().empty())
return language_entry;
}
return raw.language_entries.at(static_cast<u8>(Language::AmericanEnglish));
}
std::array<std::string, 16> NACP::GetApplicationNames() const {
std::array<std::string, 16> names{};
for (size_t i = 0; i < raw.language_entries.size(); ++i) {
names[i] = raw.language_entries[i].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 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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