94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
|
// Copyright 2018 yuzu emulator team
|
||
|
|
// Licensed under GPLv2 or any later version
|
||
|
|
// Refer to the license.txt file included.
|
||
|
|
|
||
|
|
#include <algorithm>
|
||
|
|
#include <utility>
|
||
|
|
|
||
|
|
#include "core/file_sys/vfs_concat.h"
|
||
|
|
|
||
|
|
namespace FileSys {
|
||
|
|
|
||
|
|
VirtualFile ConcatenateFiles(std::vector<VirtualFile> files, std::string_view name) {
|
||
|
|
if (files.empty())
|
||
|
|
return nullptr;
|
||
|
|
if (files.size() == 1)
|
||
|
|
return files[0];
|
||
|
|
|
||
|
|
return std::shared_ptr<VfsFile>(new ConcatenatedVfsFile(std::move(files), name));
|
||
|
|
}
|
||
|
|
|
||
|
|
ConcatenatedVfsFile::ConcatenatedVfsFile(std::vector<VirtualFile> files_, std::string_view name)
|
||
|
|
: name(name) {
|
||
|
|
size_t next_offset = 0;
|
||
|
|
for (const auto& file : files_) {
|
||
|
|
files[next_offset] = file;
|
||
|
|
next_offset += file->GetSize();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string ConcatenatedVfsFile::GetName() const {
|
||
|
|
if (files.empty())
|
||
|
|
return "";
|
||
|
|
if (!name.empty())
|
||
|
|
return name;
|
||
|
|
return files.begin()->second->GetName();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t ConcatenatedVfsFile::GetSize() const {
|
||
|
|
if (files.empty())
|
||
|
|
return 0;
|
||
|
|
return files.rbegin()->first + files.rbegin()->second->GetSize();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ConcatenatedVfsFile::Resize(size_t new_size) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::shared_ptr<VfsDirectory> ConcatenatedVfsFile::GetContainingDirectory() const {
|
||
|
|
if (files.empty())
|
||
|
|
return nullptr;
|
||
|
|
return files.begin()->second->GetContainingDirectory();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ConcatenatedVfsFile::IsWritable() const {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ConcatenatedVfsFile::IsReadable() const {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t ConcatenatedVfsFile::Read(u8* data, size_t length, size_t offset) const {
|
||
|
|
auto entry = files.end();
|
||
|
|
for (auto iter = files.begin(); iter != files.end(); ++iter) {
|
||
|
|
if (iter->first > offset) {
|
||
|
|
entry = --iter;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (entry == files.end() && offset < files.rbegin()->first + files.rbegin()->second->GetSize())
|
||
|
|
--entry;
|
||
|
|
|
||
|
|
if (entry == files.end())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
const auto remaining = entry->second->GetSize() + offset - entry->first;
|
||
|
|
if (length > remaining) {
|
||
|
|
return entry->second->Read(data, remaining, offset - entry->first) +
|
||
|
|
Read(data + remaining, length - remaining, offset + remaining);
|
||
|
|
}
|
||
|
|
|
||
|
|
return entry->second->Read(data, length, offset - entry->first);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t ConcatenatedVfsFile::Write(const u8* data, size_t length, size_t offset) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ConcatenatedVfsFile::Rename(std::string_view name) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
} // namespace FileSys
|