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https://github.com/jakcron/nstool
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47 lines
No EOL
1.5 KiB
C++
47 lines
No EOL
1.5 KiB
C++
#pragma once
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#include <sstream>
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#include <fnd/IFile.h>
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#include <fnd/SharedPtr.h>
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#include <fnd/Vec.h>
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#include <fnd/List.h>
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#include <fnd/LayeredIntegrityMetadata.h>
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namespace fnd
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{
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class LayeredIntegrityWrappedIFile : public fnd::IFile
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{
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public:
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LayeredIntegrityWrappedIFile(const fnd::SharedPtr<fnd::IFile>& file, const LayeredIntegrityMetadata& hdr);
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size_t size();
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void seek(size_t offset);
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void read(byte_t* out, size_t len);
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void read(byte_t* out, size_t offset, size_t len);
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void write(const byte_t* out, size_t len);
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void write(const byte_t* out, size_t offset, size_t len);
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private:
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const std::string kModuleName = "LayeredIntegrityWrappedIFile";
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static const size_t kDefaultCacheSize = 0x10000;
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std::stringstream mErrorSs;
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fnd::SharedPtr<fnd::IFile> mFile;
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// data file
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fnd::SharedPtr<fnd::IFile> mData;
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size_t mDataOffset;
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size_t mDataBlockSize;
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fnd::List<fnd::sha::sSha256Hash> mDataHashLayer;
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bool mAlignHashCalcToBlock;
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fnd::Vec<byte_t> mCache;
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size_t mCacheBlockNum;
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inline size_t getOffsetBlock(size_t offset) const { return offset / mDataBlockSize; }
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inline size_t getOffsetInBlock(size_t offset) const { return offset % mDataBlockSize; }
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inline size_t getRemanderBlockReadSize(size_t total_size) const { return total_size % mDataBlockSize; }
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inline size_t getBlockNum(size_t total_size) const { return (total_size / mDataBlockSize) + (getRemanderBlockReadSize(total_size) > 0); }
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void initialiseDataLayer(const LayeredIntegrityMetadata& hdr);
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void readData(size_t block_offset, size_t block_num);
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};
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} |