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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/core.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/nca_metadata.h"
#include "core/file_sys/registered_cache.h"
#include "core/file_sys/romfs.h"
#include "core/file_sys/system_archive/system_archive.h"
#include "core/file_sys/vfs/vfs.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/hle/service/glue/time/time_zone_binary.h"
namespace Service::Glue::Time {
namespace {
constexpr u64 TimeZoneBinaryId = 0x10000000000080E;
static FileSys::VirtualDir g_time_zone_binary_romfs{};
static Result g_time_zone_binary_mount_result{ResultUnknown};
static std::vector<u8> g_time_zone_scratch_space(0x2800, 0);
Result TimeZoneReadBinary(size_t& out_read_size, std::span<u8> out_buffer, size_t out_buffer_size,
std::string_view path) {
R_UNLESS(g_time_zone_binary_mount_result == ResultSuccess, g_time_zone_binary_mount_result);
auto vfs_file{g_time_zone_binary_romfs->GetFileRelative(path)};
R_UNLESS(vfs_file, ResultUnknown);
auto file_size{vfs_file->GetSize()};
R_UNLESS(file_size > 0, ResultUnknown);
R_UNLESS(file_size <= out_buffer_size, Service::PSC::Time::ResultFailed);
out_read_size = vfs_file->Read(out_buffer.data(), file_size);
R_UNLESS(out_read_size > 0, ResultUnknown);
R_SUCCEED();
}
} // namespace
void ResetTimeZoneBinary() {
g_time_zone_binary_romfs = {};
g_time_zone_binary_mount_result = ResultUnknown;
g_time_zone_scratch_space.clear();
g_time_zone_scratch_space.resize(0x2800, 0);
}
Result MountTimeZoneBinary(Core::System& system) {
ResetTimeZoneBinary();
auto& fsc{system.GetFileSystemController()};
std::unique_ptr<FileSys::NCA> nca{};
auto* bis_system = fsc.GetSystemNANDContents();
R_UNLESS(bis_system, ResultUnknown);
nca = bis_system->GetEntry(TimeZoneBinaryId, FileSys::ContentRecordType::Data);
if (nca) {
g_time_zone_binary_romfs = FileSys::ExtractRomFS(nca->GetRomFS());
}
if (g_time_zone_binary_romfs) {
// Validate that the romfs is readable, using invalid firmware keys can cause this to get
// set but the files to be garbage. In that case, we want to hit the next path and
// synthesise them instead.
Service::PSC::Time::LocationName name{"Etc/GMT"};
if (!IsTimeZoneBinaryValid(name)) {
ResetTimeZoneBinary();
}
}
if (!g_time_zone_binary_romfs) {
g_time_zone_binary_romfs = FileSys::ExtractRomFS(
FileSys::SystemArchive::SynthesizeSystemArchive(TimeZoneBinaryId));
}
R_UNLESS(g_time_zone_binary_romfs, ResultUnknown);
g_time_zone_binary_mount_result = ResultSuccess;
R_SUCCEED();
}
void GetTimeZoneBinaryListPath(std::string& out_path) {
if (g_time_zone_binary_mount_result != ResultSuccess) {
return;
}
// out_path = fmt::format("{}:/binaryList.txt", "TimeZoneBinary");
out_path = "/binaryList.txt";
}
void GetTimeZoneBinaryVersionPath(std::string& out_path) {
if (g_time_zone_binary_mount_result != ResultSuccess) {
return;
}
// out_path = fmt::format("{}:/version.txt", "TimeZoneBinary");
out_path = "/version.txt";
}
void GetTimeZoneZonePath(std::string& out_path, const Service::PSC::Time::LocationName& name) {
if (g_time_zone_binary_mount_result != ResultSuccess) {
return;
}
// out_path = fmt::format("{}:/zoneinfo/{}", "TimeZoneBinary", name);
out_path = fmt::format("/zoneinfo/{}", name.data());
}
bool IsTimeZoneBinaryValid(const Service::PSC::Time::LocationName& name) {
std::string path{};
GetTimeZoneZonePath(path, name);
auto vfs_file{g_time_zone_binary_romfs->GetFileRelative(path)};
if (!vfs_file) {
LOG_INFO(Service_Time, "Could not find timezone file {}", path);
return false;
}
return vfs_file->GetSize() != 0;
}
u32 GetTimeZoneCount() {
std::string path{};
GetTimeZoneBinaryListPath(path);
size_t bytes_read{};
if (TimeZoneReadBinary(bytes_read, g_time_zone_scratch_space, 0x2800, path) != ResultSuccess) {
return 0;
}
if (bytes_read == 0) {
return 0;
}
auto chars = std::span(reinterpret_cast<char*>(g_time_zone_scratch_space.data()), bytes_read);
u32 count{};
for (auto chr : chars) {
if (chr == '\n') {
count++;
}
}
return count;
}
Result GetTimeZoneVersion(Service::PSC::Time::RuleVersion& out_rule_version) {
std::string path{};
GetTimeZoneBinaryVersionPath(path);
auto rule_version_buffer{std::span(reinterpret_cast<u8*>(&out_rule_version),
sizeof(Service::PSC::Time::RuleVersion))};
size_t bytes_read{};
R_TRY(TimeZoneReadBinary(bytes_read, rule_version_buffer, rule_version_buffer.size_bytes(),
path));
rule_version_buffer[bytes_read] = 0;
R_SUCCEED();
}
Result GetTimeZoneRule(std::span<const u8>& out_rule, size_t& out_rule_size,
const Service::PSC::Time::LocationName& name) {
std::string path{};
GetTimeZoneZonePath(path, name);
size_t bytes_read{};
R_TRY(TimeZoneReadBinary(bytes_read, g_time_zone_scratch_space,
g_time_zone_scratch_space.size(), path));
out_rule = std::span(g_time_zone_scratch_space.data(), bytes_read);
out_rule_size = bytes_read;
R_SUCCEED();
}
Result GetTimeZoneLocationList(u32& out_count,
std::span<Service::PSC::Time::LocationName> out_names,
size_t max_names, u32 index) {
std::string path{};
GetTimeZoneBinaryListPath(path);
size_t bytes_read{};
R_TRY(TimeZoneReadBinary(bytes_read, g_time_zone_scratch_space,
g_time_zone_scratch_space.size(), path));
out_count = 0;
R_SUCCEED_IF(bytes_read == 0);
Service::PSC::Time::LocationName current_name{};
size_t current_name_len{};
std::span<const u8> chars{g_time_zone_scratch_space};
u32 name_count{};
for (auto chr : chars) {
if (chr == '\r') {
continue;
}
if (chr == '\n') {
if (name_count >= index) {
out_names[out_count] = current_name;
out_count++;
if (out_count >= max_names) {
break;
}
}
name_count++;
current_name_len = 0;
current_name = {};
continue;
}
if (chr == '\0') {
break;
}
R_UNLESS(current_name_len <= current_name.size() - 2, Service::PSC::Time::ResultFailed);
current_name[current_name_len++] = chr;
}
R_SUCCEED();
}
} // namespace Service::Glue::Time
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