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Diffstat (limited to 'src/lib/util/tape_file_interface.h')
-rw-r--r-- | src/lib/util/tape_file_interface.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/lib/util/tape_file_interface.h b/src/lib/util/tape_file_interface.h new file mode 100644 index 00000000000..8003c05777f --- /dev/null +++ b/src/lib/util/tape_file_interface.h @@ -0,0 +1,58 @@ +// license:BSD-3-Clause +// copyright-holders:Mietek Bak +#ifndef MAME_UTIL_TAPE_FILE_INTERFACE_H +#define MAME_UTIL_TAPE_FILE_INTERFACE_H + +#pragma once + +#include <cstdint> +#include <utility> + +////////////////////////////////////////////////////////////////////////////// + +enum class tape_status : std::uint8_t { + 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 bool is_read_only() const = 0; + virtual bool is_ew() const = 0; + virtual std::uint8_t get_density_code() const = 0; + virtual std::pair<tape_status, std::uint32_t> read_position() const = 0; + + // non-destructive operations + virtual void rewind(bool eom) = 0; + virtual tape_status locate_block(std::uint32_t req_block_addr) = 0; + virtual tape_status space_eod() = 0; + virtual std::pair<tape_status, std::uint32_t> space_blocks(std::uint32_t req_blocks_num) = 0; + virtual std::pair<tape_status, std::uint32_t> space_filemarks(std::uint32_t req_marks_num, bool setmarks = false, bool sequential = false) = 0; + virtual std::pair<tape_status, std::uint32_t> space_blocks_reverse(std::uint32_t req_blocks_num) = 0; + virtual std::pair<tape_status, std::uint32_t> space_filemarks_reverse(std::uint32_t req_marks_num, bool setmarks = false, bool sequential = false) = 0; + virtual std::pair<tape_status, std::uint32_t> read_block(std::uint8_t *buf, std::uint32_t buf_size) = 0; + + // destructive operations + virtual void erase(bool eom) = 0; + virtual tape_status write_block(const std::uint8_t *buf, std::uint32_t len) = 0; + virtual tape_status write_filemarks(std::uint32_t req_marks_num, bool setmarks = false) = 0; +}; + +////////////////////////////////////////////////////////////////////////////// + +#endif // MAME_UTIL_TAPE_FILE_INTERFACE_H |