mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-23 20:32:10 +00:00
396 lines
18 KiB
C++
396 lines
18 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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namespace ams::fssystem {
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namespace {
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constexpr size_t CalculateRequiredWorkingMemorySize(const RomFileSystemInformation &header) {
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return header.directory_bucket_size + header.directory_entry_size + header.file_bucket_size + header.file_entry_size;
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}
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class RomFsFile : public ams::fs::fsa::IFile, public ams::fs::impl::Newable {
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private:
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RomFsFileSystem *parent;
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s64 start;
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s64 end;
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private:
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s64 GetSize() const {
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return this->end - this->start;
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}
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public:
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RomFsFile(RomFsFileSystem *p, s64 s, s64 e) : parent(p), start(s), end(e) { /* ... */ }
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virtual ~RomFsFile() { /* ... */ }
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public:
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virtual Result ReadImpl(size_t *out, s64 offset, void *buffer, size_t size, const fs::ReadOption &option) override {
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([=]() -> Result {
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size_t read_size = 0;
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R_TRY(this->DryRead(std::addressof(read_size), offset, size, option, fs::OpenMode_Read));
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R_TRY(this->parent->GetBaseStorage()->Read(offset + this->start, buffer, read_size));
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*out = read_size;
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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virtual Result GetSizeImpl(s64 *out) override {
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*out = this->GetSize();
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return ResultSuccess();
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}
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virtual Result FlushImpl() override {
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return ResultSuccess();
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}
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virtual Result WriteImpl(s64 offset, const void *buffer, size_t size, const fs::WriteOption &option) override {
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bool needs_append;
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R_TRY(this->DryWrite(std::addressof(needs_append), offset, size, option, fs::OpenMode_Read));
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AMS_ASSERT(needs_append == false);
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return fs::ResultUnsupportedOperationInRomFsFileA();
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}
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virtual Result SetSizeImpl(s64 size) override {
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R_TRY(this->DrySetSize(size, fs::OpenMode_Read));
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return fs::ResultUnsupportedOperationInRomFsFileA();
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}
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virtual Result OperateRangeImpl(void *dst, size_t dst_size, fs::OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) override {
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switch (op_id) {
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case fs::OperationId::InvalidateCache:
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case fs::OperationId::QueryRange:
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{
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R_UNLESS(offset >= 0, fs::ResultOutOfRange());
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R_UNLESS(this->GetSize() >= 0, fs::ResultOutOfRange());
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auto operate_size = size;
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if (offset + operate_size > this->GetSize() || offset + operate_size < offset) {
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operate_size = this->GetSize() - offset;
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}
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([=]() -> Result {
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R_TRY(this->parent->GetBaseStorage()->OperateRange(dst, dst_size, op_id, this->start + offset, operate_size, src, src_size));
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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default:
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return fs::ResultUnsupportedOperationInRomFsFileB();
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}
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}
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public:
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virtual sf::cmif::DomainObjectId GetDomainObjectId() const override {
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AMS_ABORT();
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}
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};
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class RomFsDirectory : public ams::fs::fsa::IDirectory, public ams::fs::impl::Newable {
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private:
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using FindPosition = RomFsFileSystem::RomFileTable::FindPosition;
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private:
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RomFsFileSystem *parent;
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FindPosition current_find;
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FindPosition first_find;
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fs::OpenDirectoryMode mode;
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public:
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RomFsDirectory(RomFsFileSystem *p, const FindPosition &f, fs::OpenDirectoryMode m) : parent(p), current_find(f), first_find(f), mode(m) { /* ... */ }
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virtual ~RomFsDirectory() override { /* ... */ }
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public:
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virtual Result ReadImpl(s64 *out_count, fs::DirectoryEntry *out_entries, s64 max_entries) {
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([=]() -> Result {
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return this->ReadImpl(out_count, std::addressof(this->current_find), out_entries, max_entries);
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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virtual Result GetEntryCountImpl(s64 *out) {
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FindPosition find = this->first_find;
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_TRY(this->ReadImpl(out, std::addressof(find), nullptr, 0));
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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private:
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Result ReadImpl(s64 *out_count, FindPosition *find, fs::DirectoryEntry *out_entries, s64 max_entries) {
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constexpr size_t NameBufferSize = fs::EntryNameLengthMax + 1;
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RomPathChar name[NameBufferSize];
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s32 i = 0;
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if (this->mode & fs::OpenDirectoryMode_Directory) {
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while (i < max_entries || out_entries == nullptr) {
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R_TRY_CATCH(this->parent->GetRomFileTable()->FindNextDirectory(name, find)) {
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R_CATCH(fs::ResultDbmFindFinished) { break; }
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} R_END_TRY_CATCH;
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if (out_entries) {
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R_UNLESS(strnlen(name, NameBufferSize) < NameBufferSize, fs::ResultTooLongPath());
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strncpy(out_entries[i].name, name, fs::EntryNameLengthMax);
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out_entries[i].name[fs::EntryNameLengthMax] = '\x00';
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out_entries[i].type = fs::DirectoryEntryType_Directory;
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out_entries[i].file_size = 0;
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}
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i++;
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}
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}
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if (this->mode & fs::OpenDirectoryMode_File) {
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while (i < max_entries || out_entries == nullptr) {
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auto file_pos = find->next_file;
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R_TRY_CATCH(this->parent->GetRomFileTable()->FindNextFile(name, find)) {
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R_CATCH(fs::ResultDbmFindFinished) { break; }
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} R_END_TRY_CATCH;
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if (out_entries) {
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R_UNLESS(strnlen(name, NameBufferSize) < NameBufferSize, fs::ResultTooLongPath());
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strncpy(out_entries[i].name, name, fs::EntryNameLengthMax);
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out_entries[i].name[fs::EntryNameLengthMax] = '\x00';
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out_entries[i].type = fs::DirectoryEntryType_File;
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RomFsFileSystem::RomFileTable::FileInfo file_info;
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R_TRY(this->parent->GetRomFileTable()->OpenFile(std::addressof(file_info), this->parent->GetRomFileTable()->ConvertToFileId(file_pos)));
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out_entries[i].file_size = file_info.size.Get();
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}
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i++;
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}
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}
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*out_count = i;
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return ResultSuccess();
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}
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public:
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virtual sf::cmif::DomainObjectId GetDomainObjectId() const override {
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AMS_ABORT();
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}
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};
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}
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RomFsFileSystem::RomFsFileSystem() : base_storage() {
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/* ... */
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}
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RomFsFileSystem::~RomFsFileSystem() {
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/* ... */
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}
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fs::IStorage *RomFsFileSystem::GetBaseStorage() {
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return this->base_storage;
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}
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RomFsFileSystem::RomFileTable *RomFsFileSystem::GetRomFileTable() {
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return std::addressof(this->rom_file_table);
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}
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Result RomFsFileSystem::GetRequiredWorkingMemorySize(size_t *out, fs::IStorage *storage) {
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RomFileSystemInformation header;
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_TRY(storage->Read(0, std::addressof(header), sizeof(header)));
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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*out = CalculateRequiredWorkingMemorySize(header);
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return ResultSuccess();
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}
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Result RomFsFileSystem::Initialize(fs::IStorage *base, void *work, size_t work_size, bool use_cache) {
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AMS_ABORT_UNLESS(!use_cache || work != nullptr);
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AMS_ABORT_UNLESS(base != nullptr);
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/* Register blocking context for the scope. */
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buffers::ScopedBufferManagerContextRegistration _sr;
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buffers::EnableBlockingBufferManagerAllocation();
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/* Read the header. */
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RomFileSystemInformation header;
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R_TRY(base->Read(0, std::addressof(header), sizeof(header)));
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/* Set up our storages. */
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if (use_cache) {
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const size_t needed_size = CalculateRequiredWorkingMemorySize(header);
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R_UNLESS(work_size >= needed_size, fs::ResultAllocationFailureInRomFsFileSystemA());
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u8 *buf = static_cast<u8 *>(work);
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auto dir_bucket_buf = buf; buf += header.directory_bucket_size;
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auto dir_entry_buf = buf; buf += header.directory_entry_size;
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auto file_bucket_buf = buf; buf += header.file_bucket_size;
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auto file_entry_buf = buf; buf += header.file_entry_size;
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R_TRY(base->Read(header.directory_bucket_offset, dir_bucket_buf, static_cast<size_t>(header.directory_bucket_size)));
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R_TRY(base->Read(header.directory_entry_offset, dir_entry_buf, static_cast<size_t>(header.directory_entry_size)));
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R_TRY(base->Read(header.file_bucket_offset, file_bucket_buf, static_cast<size_t>(header.file_bucket_size)));
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R_TRY(base->Read(header.file_entry_offset, file_entry_buf, static_cast<size_t>(header.file_entry_size)));
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this->dir_bucket_storage.reset(new fs::MemoryStorage(dir_bucket_buf, header.directory_bucket_size));
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this->dir_entry_storage.reset(new fs::MemoryStorage(dir_entry_buf, header.directory_entry_size));
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this->file_bucket_storage.reset(new fs::MemoryStorage(file_bucket_buf, header.file_bucket_size));
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this->file_entry_storage.reset(new fs::MemoryStorage(file_entry_buf, header.file_entry_size));
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} else {
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this->dir_bucket_storage.reset(new fs::SubStorage(base, header.directory_bucket_offset, header.directory_bucket_size));
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this->dir_entry_storage.reset(new fs::SubStorage(base, header.directory_entry_offset, header.directory_entry_size));
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this->file_bucket_storage.reset(new fs::SubStorage(base, header.file_bucket_offset, header.file_bucket_size));
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this->file_entry_storage.reset(new fs::SubStorage(base, header.file_entry_offset, header.file_entry_size));
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}
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/* Ensure we allocated storages successfully. */
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R_UNLESS(this->dir_bucket_storage != nullptr, fs::ResultAllocationFailureInRomFsFileSystemB());
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R_UNLESS(this->dir_entry_storage != nullptr, fs::ResultAllocationFailureInRomFsFileSystemB());
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R_UNLESS(this->file_bucket_storage != nullptr, fs::ResultAllocationFailureInRomFsFileSystemB());
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R_UNLESS(this->file_entry_storage != nullptr, fs::ResultAllocationFailureInRomFsFileSystemB());
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/* Initialize the rom table. */
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R_TRY(this->rom_file_table.Initialize(this->dir_bucket_storage.get(), 0, static_cast<u32>(header.directory_bucket_size),
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this->dir_entry_storage.get(), 0, static_cast<u32>(header.directory_entry_size),
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this->file_bucket_storage.get(), 0, static_cast<u32>(header.file_bucket_size),
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this->file_entry_storage.get(), 0, static_cast<u32>(header.file_entry_size)));
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/* Set members. */
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this->entry_size = header.body_offset;
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this->base_storage = base;
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return ResultSuccess();
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}
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Result RomFsFileSystem::Initialize(std::shared_ptr<fs::IStorage> base, void *work, size_t work_size, bool use_cache) {
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this->shared_storage = std::move(base);
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return this->Initialize(this->shared_storage.get(), work, work_size, use_cache);
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}
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Result RomFsFileSystem::GetFileInfo(RomFileTable::FileInfo *out, const char *path) {
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([=]() -> Result {
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R_TRY_CATCH(this->rom_file_table.OpenFile(out, path)) {
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R_CONVERT(fs::ResultDbmNotFound, fs::ResultPathNotFound());
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} R_END_TRY_CATCH;
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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Result RomFsFileSystem::GetFileBaseOffset(s64 *out, const char *path) {
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RomFileTable::FileInfo info;
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R_TRY(this->GetFileInfo(std::addressof(info), path));
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*out = this->entry_size + info.offset.Get();
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return ResultSuccess();
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}
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Result RomFsFileSystem::CreateFileImpl(const char *path, s64 size, int flags) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::DeleteFileImpl(const char *path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::CreateDirectoryImpl(const char *path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::DeleteDirectoryImpl(const char *path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::DeleteDirectoryRecursivelyImpl(const char *path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::RenameFileImpl(const char *old_path, const char *new_path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::RenameDirectoryImpl(const char *old_path, const char *new_path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::GetEntryTypeImpl(fs::DirectoryEntryType *out, const char *path) {
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([=]() -> Result {
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RomDirectoryInfo dir_info;
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R_TRY_CATCH(this->rom_file_table.GetDirectoryInformation(std::addressof(dir_info), path)) {
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R_CONVERT(fs::ResultDbmNotFound, fs::ResultPathNotFound())
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R_CATCH(fs::ResultDbmInvalidOperation) {
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RomFileTable::FileInfo file_info;
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R_TRY(this->GetFileInfo(std::addressof(file_info), path));
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*out = fs::DirectoryEntryType_File;
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return ResultSuccess();
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}
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} R_END_TRY_CATCH;
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*out = fs::DirectoryEntryType_Directory;
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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return ResultSuccess();
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}
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Result RomFsFileSystem::OpenFileImpl(std::unique_ptr<fs::fsa::IFile> *out_file, const char *path, fs::OpenMode mode) {
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R_UNLESS(mode == fs::OpenMode_Read, fs::ResultInvalidOpenMode());
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RomFileTable::FileInfo file_info;
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R_TRY(this->GetFileInfo(std::addressof(file_info), path));
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auto file = std::make_unique<RomFsFile>(this, this->entry_size + file_info.offset.Get(), this->entry_size + file_info.offset.Get() + file_info.size.Get());
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R_UNLESS(file != nullptr, fs::ResultAllocationFailureInRomFsFileSystemC());
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*out_file = std::move(file);
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return ResultSuccess();
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}
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Result RomFsFileSystem::OpenDirectoryImpl(std::unique_ptr<fs::fsa::IDirectory> *out_dir, const char *path, fs::OpenDirectoryMode mode) {
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RomFileTable::FindPosition find;
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_TRY_CATCH(this->rom_file_table.FindOpen(std::addressof(find), path)) {
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R_CONVERT(fs::ResultDbmNotFound, fs::ResultPathNotFound())
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} R_END_TRY_CATCH;
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return ResultSuccess();
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}, AMS_CURRENT_FUNCTION_NAME));
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auto dir = std::make_unique<RomFsDirectory>(this, find, mode);
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R_UNLESS(dir != nullptr, fs::ResultAllocationFailureInRomFsFileSystemD());
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*out_dir = std::move(dir);
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return ResultSuccess();
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}
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Result RomFsFileSystem::CommitImpl() {
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return ResultSuccess();
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}
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Result RomFsFileSystem::GetFreeSpaceSizeImpl(s64 *out, const char *path) {
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*out = 0;
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return ResultSuccess();
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}
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Result RomFsFileSystem::CleanDirectoryRecursivelyImpl(const char *path) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemA();
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}
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Result RomFsFileSystem::CommitProvisionallyImpl(s64 counter) {
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return fs::ResultUnsupportedOperationInRomFsFileSystemB();
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}
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}
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