diff options
Diffstat (limited to 'src/core/file_sys/disk_archive.cpp')
-rw-r--r-- | src/core/file_sys/disk_archive.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/core/file_sys/disk_archive.cpp b/src/core/file_sys/disk_archive.cpp new file mode 100644 index 000000000..eabf58057 --- /dev/null +++ b/src/core/file_sys/disk_archive.cpp @@ -0,0 +1,167 @@ +// Copyright 2014 Citra Emulator Project +// Licensed under GPLv2 +// Refer to the license.txt file included. + +#include <sys/stat.h> + +#include "common/common_types.h" +#include "common/file_util.h" + +#include "core/file_sys/disk_archive.h" +#include "core/settings.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// FileSys namespace + +namespace FileSys { + +std::unique_ptr<FileBackend> DiskArchive::OpenFile(const Path& path, const Mode mode) const { + LOG_DEBUG(Service_FS, "called path=%s mode=%01X", path.DebugStr().c_str(), mode.hex); + DiskFile* file = new DiskFile(this, path, mode); + if (!file->Open()) + return nullptr; + return std::unique_ptr<FileBackend>(file); +} + +bool DiskArchive::DeleteFile(const FileSys::Path& path) const { + return FileUtil::Delete(GetMountPoint() + path.AsString()); +} + +bool DiskArchive::RenameFile(const FileSys::Path& src_path, const FileSys::Path& dest_path) const { + return FileUtil::Rename(GetMountPoint() + src_path.AsString(), GetMountPoint() + dest_path.AsString()); +} + +bool DiskArchive::DeleteDirectory(const FileSys::Path& path) const { + return FileUtil::DeleteDir(GetMountPoint() + path.AsString()); +} + +bool DiskArchive::CreateDirectory(const Path& path) const { + return FileUtil::CreateDir(GetMountPoint() + path.AsString()); +} + +bool DiskArchive::RenameDirectory(const FileSys::Path& src_path, const FileSys::Path& dest_path) const { + return FileUtil::Rename(GetMountPoint() + src_path.AsString(), GetMountPoint() + dest_path.AsString()); +} + +std::unique_ptr<DirectoryBackend> DiskArchive::OpenDirectory(const Path& path) const { + LOG_DEBUG(Service_FS, "called path=%s", path.DebugStr().c_str()); + DiskDirectory* directory = new DiskDirectory(this, path); + if (!directory->Open()) + return nullptr; + return std::unique_ptr<DirectoryBackend>(directory); +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// + +DiskFile::DiskFile(const DiskArchive* archive, const Path& path, const Mode mode) { + // TODO(Link Mauve): normalize path into an absolute path without "..", it can currently bypass + // the root directory we set while opening the archive. + // For example, opening /../../etc/passwd can give the emulated program your users list. + this->path = archive->GetMountPoint() + path.AsString(); + this->mode.hex = mode.hex; + this->archive = archive; +} + +bool DiskFile::Open() { + if (!mode.create_flag && !FileUtil::Exists(path)) { + LOG_ERROR(Service_FS, "Non-existing file %s can’t be open without mode create.", path.c_str()); + return false; + } + + std::string mode_string; + if (mode.create_flag) + mode_string = "w+"; + else if (mode.write_flag) + mode_string = "r+"; // Files opened with Write access can be read from + else if (mode.read_flag) + mode_string = "r"; + + // Open the file in binary mode, to avoid problems with CR/LF on Windows systems + mode_string += "b"; + + file = new FileUtil::IOFile(path, mode_string.c_str()); + return true; +} + +size_t DiskFile::Read(const u64 offset, const u32 length, u8* buffer) const { + file->Seek(offset, SEEK_SET); + return file->ReadBytes(buffer, length); +} + +size_t DiskFile::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const { + file->Seek(offset, SEEK_SET); + size_t written = file->WriteBytes(buffer, length); + if (flush) + file->Flush(); + return written; +} + +size_t DiskFile::GetSize() const { + return static_cast<size_t>(file->GetSize()); +} + +bool DiskFile::SetSize(const u64 size) const { + file->Resize(size); + file->Flush(); + return true; +} + +bool DiskFile::Close() const { + return file->Close(); +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// + +DiskDirectory::DiskDirectory(const DiskArchive* archive, const Path& path) { + // TODO(Link Mauve): normalize path into an absolute path without "..", it can currently bypass + // the root directory we set while opening the archive. + // For example, opening /../../usr/bin can give the emulated program your installed programs. + this->path = archive->GetMountPoint() + path.AsString(); + this->archive = archive; +} + +bool DiskDirectory::Open() { + if (!FileUtil::IsDirectory(path)) + return false; + FileUtil::ScanDirectoryTree(path, directory); + children_iterator = directory.children.begin(); + return true; +} + +u32 DiskDirectory::Read(const u32 count, Entry* entries) { + u32 entries_read = 0; + + while (entries_read < count && children_iterator != directory.children.cend()) { + const FileUtil::FSTEntry& file = *children_iterator; + const std::string& filename = file.virtualName; + Entry& entry = entries[entries_read]; + + LOG_TRACE(Service_FS, "File %s: size=%llu dir=%d", filename.c_str(), file.size, file.isDirectory); + + // TODO(Link Mauve): use a proper conversion to UTF-16. + for (size_t j = 0; j < FILENAME_LENGTH; ++j) { + entry.filename[j] = filename[j]; + if (!filename[j]) + break; + } + + FileUtil::SplitFilename83(filename, entry.short_name, entry.extension); + + entry.is_directory = file.isDirectory; + entry.is_hidden = (filename[0] == '.'); + entry.is_read_only = 0; + entry.file_size = file.size; + + // We emulate a SD card where the archive bit has never been cleared, as it would be on + // most user SD cards. + // Some homebrews (blargSNES for instance) are known to mistakenly use the archive bit as a + // file bit. + entry.is_archive = !file.isDirectory; + + ++entries_read; + ++children_iterator; + } + return entries_read; +} + +} // namespace FileSys |