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// license:BSD-3-Clause
// copyright-holders:Mietek Bak
#ifndef MAME_LIB_UTIL_TAPE_FILE_INTERFACE_H
#define MAME_LIB_UTIL_TAPE_FILE_INTERFACE_H
#pragma once
#include <utility>
//////////////////////////////////////////////////////////////////////////////
enum class tape_status : u8 {
OK, // oll korrekt
BOM, // beginning of medium
EW, // early warning
FILEMARK, // filemark
FILEMARK_EW, // filemark and early warning
SETMARK, // setmark
SETMARK_EW, // setmark and early warning
EOD, // end of data
EOD_EW, // end of data and early warning
UNKNOWN, // unknown
UNKNOWN_EW, // unknown and early warning
EOM // end of medium
};
class tape_file_interface
{
public:
// construction
virtual ~tape_file_interface() {}
// position-preserving operations
virtual const bool is_read_only() const = 0;
virtual const bool is_ew() const = 0;
virtual const u8 get_density_code() const = 0;
virtual const std::pair<const tape_status, const u32> read_position() const = 0;
// non-destructive operations
virtual void rewind(const bool eom) = 0;
virtual const tape_status locate_block(const u32 req_block_addr) = 0;
virtual const tape_status space_eod() = 0;
virtual const std::pair<const tape_status, const u32> space_blocks(const u32 req_blocks_num) = 0;
virtual const std::pair<const tape_status, const u32> space_filemarks(const u32 req_marks_num, const bool setmarks = false, const bool sequential = false) = 0;
virtual const std::pair<const tape_status, const u32> space_blocks_reverse(const u32 req_blocks_num) = 0;
virtual const std::pair<const tape_status, const u32> space_filemarks_reverse(const u32 req_marks_num, const bool setmarks = false, const bool sequential = false) = 0;
virtual const std::pair<const tape_status, const u32> read_block(u8 *const buf, const u32 buf_size) = 0;
// destructive operations
virtual void erase(const bool eom) = 0;
virtual const tape_status write_block(const u8 *const buf, const u32 len) = 0;
virtual const tape_status write_filemarks(const u32 req_marks_num, const bool setmarks = false) = 0;
};
//////////////////////////////////////////////////////////////////////////////
#endif // MAME_LIB_UTIL_TAPE_FILE_INTERFACE_H
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