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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..13c3f559b66 --- /dev/null +++ b/src/lib/util/tape_file_interface.h @@ -0,0 +1,58 @@ +// 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 |