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Diffstat (limited to 'src/core/file_sys/vfs_offset.h')
-rw-r--r-- | src/core/file_sys/vfs_offset.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/core/file_sys/vfs_offset.h b/src/core/file_sys/vfs_offset.h new file mode 100644 index 000000000..adc615b38 --- /dev/null +++ b/src/core/file_sys/vfs_offset.h @@ -0,0 +1,46 @@ +// Copyright 2018 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include "core/file_sys/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. +struct OffsetVfsFile : public VfsFile { + OffsetVfsFile(std::shared_ptr<VfsFile> file, size_t size, size_t offset = 0, + const std::string& new_name = ""); + + std::string GetName() const override; + size_t GetSize() const override; + bool Resize(size_t new_size) override; + std::shared_ptr<VfsDirectory> GetContainingDirectory() const override; + bool IsWritable() const override; + bool IsReadable() const override; + size_t Read(u8* data, size_t length, size_t offset) const override; + size_t Write(const u8* data, size_t length, size_t offset) override; + boost::optional<u8> ReadByte(size_t offset) const override; + std::vector<u8> ReadBytes(size_t size, size_t offset) const override; + std::vector<u8> ReadAllBytes() const override; + bool WriteByte(u8 data, size_t offset) override; + size_t WriteBytes(std::vector<u8> data, size_t offset) override; + + bool Rename(const std::string& name) override; + + size_t GetOffset() const; + +private: + size_t TrimToFit(size_t r_size, size_t r_offset) const; + + std::shared_ptr<VfsFile> file; + size_t offset; + size_t size; + std::string name; +}; + +} // namespace FileSys |