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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <utility>
#include "core/file_sys/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
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