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author | FearlessTobi <thm.frey@gmail.com> | 2024-01-16 06:23:01 +0100 |
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committer | Liam <byteslice@airmail.cc> | 2024-01-25 22:40:42 +0100 |
commit | 0f9288e38d80c6c63a545934557501fae40d3d83 (patch) | |
tree | 0643100d2471a1545dbfb447319b6ea26fdd6b63 /src/core/file_sys/vfs/vfs_offset.h | |
parent | fs: Move fsp_srv subclasses to separate files (diff) | |
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Diffstat (limited to 'src/core/file_sys/vfs/vfs_offset.h')
-rw-r--r-- | src/core/file_sys/vfs/vfs_offset.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/core/file_sys/vfs/vfs_offset.h b/src/core/file_sys/vfs/vfs_offset.h new file mode 100644 index 000000000..4abe41d8e --- /dev/null +++ b/src/core/file_sys/vfs/vfs_offset.h @@ -0,0 +1,50 @@ +// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <memory> + +#include "core/file_sys/vfs/vfs.h" + +namespace FileSys { + +// An implementation of VfsFile that wraps around another VfsFile at a certain offset. +// Similar to seeking to an offset. +// If the file is writable, operations that would write past the end of the offset file will expand +// the size of this wrapper. +class OffsetVfsFile : public VfsFile { +public: + OffsetVfsFile(VirtualFile file, std::size_t size, std::size_t offset = 0, + std::string new_name = "", VirtualDir new_parent = nullptr); + ~OffsetVfsFile() override; + + std::string GetName() const override; + std::size_t GetSize() const override; + bool Resize(std::size_t new_size) override; + VirtualDir GetContainingDirectory() const override; + bool IsWritable() const override; + bool IsReadable() const override; + std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override; + std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override; + std::optional<u8> ReadByte(std::size_t offset) const override; + std::vector<u8> ReadBytes(std::size_t size, std::size_t offset) const override; + std::vector<u8> ReadAllBytes() const override; + bool WriteByte(u8 data, std::size_t offset) override; + std::size_t WriteBytes(const std::vector<u8>& data, std::size_t offset) override; + + bool Rename(std::string_view new_name) override; + + std::size_t GetOffset() const; + +private: + std::size_t TrimToFit(std::size_t r_size, std::size_t r_offset) const; + + VirtualFile file; + std::size_t offset; + std::size_t size; + std::string name; + VirtualDir parent; +}; + +} // namespace FileSys |