summaryrefslogtreecommitdiffstatshomepage
path: root/src/lib/util/tape_file_interface.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/util/tape_file_interface.h')
-rw-r--r--src/lib/util/tape_file_interface.h58
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