RASCSI/cpp/disk_image/disk_image_handle.h

//---------------------------------------------------------------------------
//
//	SCSI Target Emulator RaSCSI (*^..^*)
//	for Raspberry Pi
//
//	Copyright (C) 2022-2023 akuker
//
//  	Base class for interfacing with disk images.
//
//	[ DiskImageHandle ]
//
//---------------------------------------------------------------------------

#pragma once

#include <string>
#include <cstdint>
#include <vector>
#include <string_view>

using namespace std;

class DiskImageHandle
{
public:
	DiskImageHandle(string_view path, int size, uint32_t blocks, off_t imgoff = 0);
	virtual ~DiskImageHandle() = default;

	void SetRawMode(bool raw) { cd_raw = raw; }; // CD-ROM raw mode setting
	bool GetRawMode() const {return cd_raw;}

	// Access
	virtual bool Save() = 0;											   // Save and release all
	virtual bool ReadSector(vector<uint8_t>& buf, int block) = 0;					   // Sector Read
	virtual bool WriteSector(const vector<uint8_t>& buf, int block) = 0;			   // Sector Write
	virtual bool GetCache(int index, int &track, uint32_t &serial) const = 0; // Get cache information

protected:
	int GetSectorSize() const {return sec_size;}
	int GetBlocksPerSector() const { return sec_blocks;}
	string GetPath() const {return sec_path;}
	off_t GetImgOffset() const {return imgoffset;}

	off_t GetTrackOffset(int block) const;
	off_t GetSectorOffset(int block) const;

private:
	bool cd_raw = false;
	string sec_path; // Path

	int sec_size;	 // Sector Size (8=256, 9=512, 10=1024, 11=2048, 12=4096)
	int sec_blocks;	 // Blocks per sector
	off_t imgoffset; // Offset to actual data
};