mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
synced 2025-10-31 11:36:02 +01:00
419 lines
19 KiB
C++
419 lines
19 KiB
C++
/*
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* Copyright (c) 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 fs::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 *m_parent;
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s64 m_start;
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s64 m_end;
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private:
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s64 GetSize() const {
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return m_end - m_start;
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}
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public:
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RomFsFile(RomFsFileSystem *p, s64 s, s64 e) : m_parent(p), m_start(s), m_end(e) { /* ... */ }
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virtual ~RomFsFile() { /* ... */ }
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public:
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virtual Result DoRead(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(m_parent->GetBaseStorage()->Read(offset + m_start, buffer, read_size));
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*out = read_size;
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R_SUCCEED();
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}, AMS_CURRENT_FUNCTION_NAME));
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R_SUCCEED();
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}
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virtual Result DoGetSize(s64 *out) override {
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*out = this->GetSize();
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R_SUCCEED();
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}
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virtual Result DoFlush() override {
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R_SUCCEED();
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}
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virtual Result DoWrite(s64 offset, const void *buffer, size_t size, const fs::WriteOption &option) override {
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AMS_UNUSED(buffer);
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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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R_THROW(fs::ResultUnsupportedWriteForRomFsFile());
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}
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virtual Result DoSetSize(s64 size) override {
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R_TRY(this->DrySetSize(size, fs::OpenMode_Read));
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R_THROW(fs::ResultUnsupportedWriteForRomFsFile());
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}
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virtual Result DoOperateRange(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::Invalidate:
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{
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R_RETURN(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_RETURN(m_parent->GetBaseStorage()->OperateRange(fs::OperationId::Invalidate, 0, std::numeric_limits<s64>::max()));
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}, AMS_CURRENT_FUNCTION_NAME));
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}
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case fs::OperationId::QueryRange:
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{
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R_UNLESS(offset >= 0, fs::ResultInvalidOffset());
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R_UNLESS(this->GetSize() >= offset, 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_RETURN(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_RETURN(m_parent->GetBaseStorage()->OperateRange(dst, dst_size, op_id, m_start + offset, operate_size, src, src_size));
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}, AMS_CURRENT_FUNCTION_NAME));
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}
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default:
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R_THROW(fs::ResultUnsupportedOperateRangeForRomFsFile());
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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 *m_parent;
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FindPosition m_current_find;
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FindPosition m_first_find;
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fs::OpenDirectoryMode m_mode;
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public:
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RomFsDirectory(RomFsFileSystem *p, const FindPosition &f, fs::OpenDirectoryMode m) : m_parent(p), m_current_find(f), m_first_find(f), m_mode(m) { /* ... */ }
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virtual ~RomFsDirectory() override { /* ... */ }
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public:
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virtual Result DoRead(s64 *out_count, fs::DirectoryEntry *out_entries, s64 max_entries) override {
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_RETURN(this->ReadInternal(out_count, std::addressof(m_current_find), out_entries, max_entries));
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}, AMS_CURRENT_FUNCTION_NAME));
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R_SUCCEED();
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}
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virtual Result DoGetEntryCount(s64 *out) override {
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FindPosition find = m_first_find;
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_TRY(this->ReadInternal(out, std::addressof(find), nullptr, 0));
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R_SUCCEED();
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}, AMS_CURRENT_FUNCTION_NAME));
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R_SUCCEED();
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}
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private:
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Result ReadInternal(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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fs::RomPathChar name[NameBufferSize];
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s32 i = 0;
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if (m_mode & fs::OpenDirectoryMode_Directory) {
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while (i < max_entries || out_entries == nullptr) {
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R_TRY_CATCH(m_parent->GetRomFileTable()->FindNextDirectory(name, find, NameBufferSize)) {
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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 (m_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(m_parent->GetRomFileTable()->FindNextFile(name, find, NameBufferSize)) {
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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(m_parent->GetRomFileTable()->OpenFile(std::addressof(file_info), m_parent->GetRomFileTable()->PositionToFileId(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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R_SUCCEED();
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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() : m_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 m_base_storage;
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}
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RomFsFileSystem::RomFileTable *RomFsFileSystem::GetRomFileTable() {
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return std::addressof(m_rom_file_table);
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}
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Result RomFsFileSystem::GetRequiredWorkingMemorySize(size_t *out, fs::IStorage *storage) {
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fs::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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R_SUCCEED();
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}, AMS_CURRENT_FUNCTION_NAME));
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*out = CalculateRequiredWorkingMemorySize(header);
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R_SUCCEED();
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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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fs::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::ResultAllocationMemoryFailedInRomFsFileSystemA());
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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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m_dir_bucket_storage.reset(new fs::MemoryStorage(dir_bucket_buf, header.directory_bucket_size));
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m_dir_entry_storage.reset(new fs::MemoryStorage(dir_entry_buf, header.directory_entry_size));
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m_file_bucket_storage.reset(new fs::MemoryStorage(file_bucket_buf, header.file_bucket_size));
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m_file_entry_storage.reset(new fs::MemoryStorage(file_entry_buf, header.file_entry_size));
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} else {
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m_dir_bucket_storage.reset(new fs::SubStorage(base, header.directory_bucket_offset, header.directory_bucket_size));
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m_dir_entry_storage.reset(new fs::SubStorage(base, header.directory_entry_offset, header.directory_entry_size));
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m_file_bucket_storage.reset(new fs::SubStorage(base, header.file_bucket_offset, header.file_bucket_size));
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m_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(m_dir_bucket_storage != nullptr, fs::ResultAllocationMemoryFailedInRomFsFileSystemB());
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R_UNLESS(m_dir_entry_storage != nullptr, fs::ResultAllocationMemoryFailedInRomFsFileSystemB());
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R_UNLESS(m_file_bucket_storage != nullptr, fs::ResultAllocationMemoryFailedInRomFsFileSystemB());
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R_UNLESS(m_file_entry_storage != nullptr, fs::ResultAllocationMemoryFailedInRomFsFileSystemB());
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/* Initialize the rom table. */
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R_TRY(m_rom_file_table.Initialize(fs::SubStorage(m_dir_bucket_storage.get(), 0, static_cast<u32>(header.directory_bucket_size)),
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fs::SubStorage(m_dir_entry_storage.get(), 0, static_cast<u32>(header.directory_entry_size)),
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fs::SubStorage(m_file_bucket_storage.get(), 0, static_cast<u32>(header.file_bucket_size)),
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fs::SubStorage(m_file_entry_storage.get(), 0, static_cast<u32>(header.file_entry_size))));
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/* Set members. */
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m_entry_size = header.body_offset;
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m_base_storage = base;
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R_SUCCEED();
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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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m_shared_storage = std::move(base);
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R_RETURN(this->Initialize(m_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(m_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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R_SUCCEED();
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}, AMS_CURRENT_FUNCTION_NAME));
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R_SUCCEED();
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}
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Result RomFsFileSystem::GetFileBaseOffset(s64 *out, const fs::Path &path) {
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R_TRY(this->CheckPathFormat(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 = m_entry_size + info.offset.Get();
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoCreateFile(const fs::Path &path, s64 size, int flags) {
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AMS_UNUSED(path, size, flags);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoDeleteFile(const fs::Path &path) {
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AMS_UNUSED(path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoCreateDirectory(const fs::Path &path) {
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AMS_UNUSED(path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoDeleteDirectory(const fs::Path &path) {
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AMS_UNUSED(path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoDeleteDirectoryRecursively(const fs::Path &path) {
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AMS_UNUSED(path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoRenameFile(const fs::Path &old_path, const fs::Path &new_path) {
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AMS_UNUSED(old_path, new_path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoRenameDirectory(const fs::Path &old_path, const fs::Path &new_path) {
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AMS_UNUSED(old_path, new_path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoGetEntryType(fs::DirectoryEntryType *out, const fs::Path &path) {
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R_TRY(this->CheckPathFormat(path));
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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fs::HierarchicalRomFileTable::FindPosition find_pos;
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R_TRY_CATCH(m_rom_file_table.FindOpen(std::addressof(find_pos), path.GetString())) {
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R_CONVERT(fs::ResultDbmNotFound, fs::ResultPathNotFound())
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R_CATCH(fs::ResultDbmInvalidOperation) {
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*out = fs::DirectoryEntryType_File;
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R_SUCCEED();
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}
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} R_END_TRY_CATCH;
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*out = fs::DirectoryEntryType_Directory;
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R_SUCCEED();
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}, AMS_CURRENT_FUNCTION_NAME));
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoOpenFile(std::unique_ptr<fs::fsa::IFile> *out_file, const fs::Path &path, fs::OpenMode mode) {
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R_UNLESS(mode == fs::OpenMode_Read, fs::ResultInvalidOpenMode());
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R_TRY(this->CheckPathFormat(path));
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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, m_entry_size + file_info.offset.Get(), m_entry_size + file_info.offset.Get() + file_info.size.Get());
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R_UNLESS(file != nullptr, fs::ResultAllocationMemoryFailedInRomFsFileSystemC());
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*out_file = std::move(file);
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoOpenDirectory(std::unique_ptr<fs::fsa::IDirectory> *out_dir, const fs::Path &path, fs::OpenDirectoryMode mode) {
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R_TRY(this->CheckPathFormat(path));
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RomFileTable::FindPosition find;
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R_TRY(buffers::DoContinuouslyUntilBufferIsAllocated([&]() -> Result {
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R_TRY_CATCH(m_rom_file_table.FindOpen(std::addressof(find), path.GetString())) {
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R_CONVERT(fs::ResultDbmNotFound, fs::ResultPathNotFound())
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} R_END_TRY_CATCH;
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R_SUCCEED();
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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::ResultAllocationMemoryFailedInRomFsFileSystemD());
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*out_dir = std::move(dir);
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoCommit() {
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoGetFreeSpaceSize(s64 *out, const fs::Path &path) {
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AMS_UNUSED(path);
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*out = 0;
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R_SUCCEED();
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}
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Result RomFsFileSystem::DoCleanDirectoryRecursively(const fs::Path &path) {
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AMS_UNUSED(path);
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R_THROW(fs::ResultUnsupportedWriteForRomFsFileSystem());
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}
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Result RomFsFileSystem::DoCommitProvisionally(s64 counter) {
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AMS_UNUSED(counter);
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R_THROW(fs::ResultUnsupportedCommitProvisionallyForRomFsFileSystem());
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}
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}
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