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100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <utility>
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#include "core/file_sys/vfs_offset.h"
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namespace FileSys {
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OffsetVfsFile::OffsetVfsFile(VirtualFile file_, std::size_t size_, std::size_t offset_,
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std::string name_, VirtualDir parent_)
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: file(file_), offset(offset_), size(size_), name(std::move(name_)),
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parent(parent_ == nullptr ? file->GetContainingDirectory() : std::move(parent_)) {}
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OffsetVfsFile::~OffsetVfsFile() = default;
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std::string OffsetVfsFile::GetName() const {
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return name.empty() ? file->GetName() : name;
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}
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std::size_t OffsetVfsFile::GetSize() const {
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return size;
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}
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bool OffsetVfsFile::Resize(std::size_t new_size) {
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if (offset + new_size < file->GetSize()) {
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size = new_size;
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} else {
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auto res = file->Resize(offset + new_size);
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if (!res)
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return false;
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size = new_size;
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}
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return true;
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}
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VirtualDir OffsetVfsFile::GetContainingDirectory() const {
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return parent;
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}
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bool OffsetVfsFile::IsWritable() const {
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return file->IsWritable();
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}
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bool OffsetVfsFile::IsReadable() const {
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return file->IsReadable();
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}
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std::size_t OffsetVfsFile::Read(u8* data, std::size_t length, std::size_t r_offset) const {
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return file->Read(data, TrimToFit(length, r_offset), offset + r_offset);
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}
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std::size_t OffsetVfsFile::Write(const u8* data, std::size_t length, std::size_t r_offset) {
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return file->Write(data, TrimToFit(length, r_offset), offset + r_offset);
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}
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std::optional<u8> OffsetVfsFile::ReadByte(std::size_t r_offset) const {
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if (r_offset >= size) {
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return std::nullopt;
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}
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return file->ReadByte(offset + r_offset);
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}
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std::vector<u8> OffsetVfsFile::ReadBytes(std::size_t r_size, std::size_t r_offset) const {
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return file->ReadBytes(TrimToFit(r_size, r_offset), offset + r_offset);
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}
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std::vector<u8> OffsetVfsFile::ReadAllBytes() const {
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return file->ReadBytes(size, offset);
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}
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bool OffsetVfsFile::WriteByte(u8 data, std::size_t r_offset) {
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if (r_offset < size)
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return file->WriteByte(data, offset + r_offset);
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return false;
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}
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std::size_t OffsetVfsFile::WriteBytes(const std::vector<u8>& data, std::size_t r_offset) {
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return file->Write(data.data(), TrimToFit(data.size(), r_offset), offset + r_offset);
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}
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bool OffsetVfsFile::Rename(std::string_view new_name) {
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return file->Rename(new_name);
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}
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std::size_t OffsetVfsFile::GetOffset() const {
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return offset;
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}
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std::size_t OffsetVfsFile::TrimToFit(std::size_t r_size, std::size_t r_offset) const {
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return std::clamp(r_size, std::size_t{0}, size - r_offset);
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}
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} // namespace FileSys
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