diff options
Diffstat (limited to 'src/core/file_sys/vfs/vfs_offset.cpp')
-rw-r--r-- | src/core/file_sys/vfs/vfs_offset.cpp | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/core/file_sys/vfs/vfs_offset.cpp b/src/core/file_sys/vfs/vfs_offset.cpp new file mode 100644 index 000000000..1a37d2670 --- /dev/null +++ b/src/core/file_sys/vfs/vfs_offset.cpp @@ -0,0 +1,98 @@ +// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <algorithm> +#include <utility> + +#include "core/file_sys/vfs/vfs_offset.h" + +namespace FileSys { + +OffsetVfsFile::OffsetVfsFile(VirtualFile file_, std::size_t size_, std::size_t offset_, + std::string name_, VirtualDir parent_) + : file(file_), offset(offset_), size(size_), name(std::move(name_)), + parent(parent_ == nullptr ? file->GetContainingDirectory() : std::move(parent_)) {} + +OffsetVfsFile::~OffsetVfsFile() = default; + +std::string OffsetVfsFile::GetName() const { + return name.empty() ? file->GetName() : name; +} + +std::size_t OffsetVfsFile::GetSize() const { + return size; +} + +bool OffsetVfsFile::Resize(std::size_t new_size) { + if (offset + new_size < file->GetSize()) { + size = new_size; + } else { + auto res = file->Resize(offset + new_size); + if (!res) + return false; + size = new_size; + } + + return true; +} + +VirtualDir OffsetVfsFile::GetContainingDirectory() const { + return parent; +} + +bool OffsetVfsFile::IsWritable() const { + return file->IsWritable(); +} + +bool OffsetVfsFile::IsReadable() const { + return file->IsReadable(); +} + +std::size_t OffsetVfsFile::Read(u8* data, std::size_t length, std::size_t r_offset) const { + return file->Read(data, TrimToFit(length, r_offset), offset + r_offset); +} + +std::size_t OffsetVfsFile::Write(const u8* data, std::size_t length, std::size_t r_offset) { + return file->Write(data, TrimToFit(length, r_offset), offset + r_offset); +} + +std::optional<u8> OffsetVfsFile::ReadByte(std::size_t r_offset) const { + if (r_offset >= size) { + return std::nullopt; + } + + return file->ReadByte(offset + r_offset); +} + +std::vector<u8> OffsetVfsFile::ReadBytes(std::size_t r_size, std::size_t r_offset) const { + return file->ReadBytes(TrimToFit(r_size, r_offset), offset + r_offset); +} + +std::vector<u8> OffsetVfsFile::ReadAllBytes() const { + return file->ReadBytes(size, offset); +} + +bool OffsetVfsFile::WriteByte(u8 data, std::size_t r_offset) { + if (r_offset < size) + return file->WriteByte(data, offset + r_offset); + + return false; +} + +std::size_t OffsetVfsFile::WriteBytes(const std::vector<u8>& data, std::size_t r_offset) { + return file->Write(data.data(), TrimToFit(data.size(), r_offset), offset + r_offset); +} + +bool OffsetVfsFile::Rename(std::string_view new_name) { + return file->Rename(new_name); +} + +std::size_t OffsetVfsFile::GetOffset() const { + return offset; +} + +std::size_t OffsetVfsFile::TrimToFit(std::size_t r_size, std::size_t r_offset) const { + return std::clamp(r_size, std::size_t{0}, size - r_offset); +} + +} // namespace FileSys |