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DataMuseum.dkPresents historical artifacts from the history of: Rational R1000/400 Tapes |
This is an automatic "excavation" of a thematic subset of
See our Wiki for more about Rational R1000/400 Tapes Excavated with: AutoArchaeologist - Free & Open Source Software. |
top - metrics - downloadIndex: T V
Length: 9392 (0x24b0)
Types: TextFile
Names: »V«
└─⟦d10a02448⟧ Bits:30000409 8mm tape, Rational 1000, ENVIRONMENT, D_12_7_3
└─⟦fc9b38f02⟧ »DATA«
└─⟦9b46a407a⟧
└─⟦12c68c704⟧
└─⟦this⟧
└─⟦5f3412b64⟧ Bits:30000745 8mm tape, Rational 1000, ENVIRONMENT 12_6_5 TOOLS
└─⟦91c658230⟧ »DATA«
└─⟦458657fb6⟧
└─⟦220843204⟧
└─⟦this⟧
with Device_Independent_Io;
with System;
package Tape_Specific is
subtype File_Type is Device_Independent_Io.File_Type;
subtype Byte_Range is Natural range 0 .. 4096;
subtype Pipe_Range is Natural range 0 .. 8;
subtype Byte_String is System.Byte_String;
type On_Off is (On, Off);
procedure Set_Block_Size (File : File_Type; Size : Byte_Range);
-- default is Recommended_Max_Block_Length
procedure Set_Streaming_Mode (File : File_Type; Mode : On_Off);
-- on = true turns streaming mode on
-- on = false turns streaming mode off
-- default is off
procedure Set_Pipeline_Size (File : File_Type; Size : Pipe_Range);
-- pipeline size to use if in streaming mode
-- default is Recommended_Pipeline_Size
procedure Unload (File : File_Type);
-- the "file" is closed
-- the tape drive unloads the tape
procedure Rewind (File : File_Type);
-- the tape is put at beginning of tape
type Skip_Records_Obstacles is
(None, -- No obstacle encountered
Tape_Mark, -- Tape mark encountered,
Bot -- Beginning of tape was encountered while
-- while skipping backwards
);
type Skip_Marks_Obstacles is
(None, -- No obstacle encountered
Double_Tape_Mark, -- 2 consecutive tape marks were encountered
-- while skipping forward
Bot -- Beginning of tape was encountered while
-- while skipping backwards
);
type Error_Status is
(Success, -- No error encountered
Record_Length_Long, -- Record on tape was longer than parameter
Not_On_Line, -- Drive was offline
Retry_Count_Exhausted, -- Record/tape mark can't be read/written
Unexpected_Tape_Error, -- Tape position lost, rewind or unload it
Unit_Is_Bad); -- Call Field Service
-- The following procedures that do not return an error status will have
-- the exception DATA_ERROR raised if RECORD_LENGTH_LONG would have been
-- returned. DEVICE_ERROR is raised for all other non-SUCCESS statuses.
procedure Unload (File : File_Type; Status : out Error_Status);
-- the "file" is closed
-- the tape drive unloads the tape
procedure Rewind (File : File_Type; Status : out Error_Status);
-- the tape is put at beginning of tape
-- The following should NOT be intermingled with the Read and Write
-- procedures in Device_Independent_IO for the same file.
-- The READ procedures return the next record of data on the tape.
-- COUNT returns the actual size of the physical tape record in bytes.
-- Only the first COUNT elements of RECRD are valid.
-- If RECORD_LENGTH_LONG is returned as the error status, then RECRD
-- contains the first RECRD'LENGTH bytes of the physical tape record and
-- COUNT = RECRD'LENGTH. If a tape mark was read, then COUNT = 0.
procedure Read (File : File_Type;
Recrd : out Byte_String;
Count : out Natural);
procedure Read (File : File_Type;
Recrd : out Byte_String;
Count : out Natural;
Status : out Error_Status);
procedure Read (File : File_Type; Recrd : out String; Count : out Natural);
procedure Read (File : File_Type;
Recrd : out String;
Count : out Natural;
Status : out Error_Status);
-- The two IS_MARK subprograms return whether the next tape record to be
-- read is a tape mark. These subprograms should only be used while in
-- streaming mode otherwise they will raise USE_ERROR. They will raise
-- MODE_ERROR if the file is not open for input.
function Is_Mark (File : File_Type) return Boolean;
procedure Is_Mark (File : File_Type;
Result : out Boolean;
Status : out Error_Status);
-- The WRITE procedures write the contents of RECRD on the tape as a
-- physical tape record. RECRD'LENGTH must be greater than or equal to 18
-- and less than or equal to the ABSOLUTE_MAX_BLOCK_LENGTH (currently
-- 4096) otherwise USE_ERROR will be raised.
-- PAST_EOT_MARKER indicates that the area beyond the reflective EOT marker
-- on the tape is now being written. Users are cautioned that tape
-- standards specify that there is at least 25 ft. of tape from the marker
-- to the end of the reel, but only the first 10 ft. are useable. It
-- is OK to write in this 10 ft. area but writing beyond that runs the
-- risk of running the tape off its reel.
procedure Write (File : File_Type;
Recrd : Byte_String;
Past_Eot_Marker : out Boolean);
procedure Write (File : File_Type;
Recrd : Byte_String;
Past_Eot_Marker : out Boolean;
Status : out Error_Status);
procedure Write (File : File_Type;
Recrd : String;
Past_Eot_Marker : out Boolean);
procedure Write (File : File_Type;
Recrd : String;
Past_Eot_Marker : out Boolean;
Status : out Error_Status);
-- The WRITE_MARK procedures cause a tape mark to be written to the tape.
procedure Write_Mark (File : File_Type; Past_Eot_Marker : out Boolean);
procedure Write_Mark (File : File_Type;
Past_Eot_Marker : out Boolean;
Status : out Error_Status);
-- The SKIP_RECORDS procedures position the tape either forward
-- or backward until ABS (NUM_RECORDS_TO_SKIP) have been skipped or
-- an obstacle has been encountered. A positive NUM_RECORDS_TO_SKIP
-- implies skipping forward; negative implies skipping backward; zero
-- implies no movement. If a tape mark is encountered as an obstacle,
-- the position of the tape is on the "other side" of the tape mark; i.e.,
-- when skipping backward, the next item read would be that same tape mark
-- or when skipping forward, the next item read would be the record or
-- tape mark beyond the obstacle tape mark. The RECORDS_SKIPPED does
-- not include the tape mark. If the Beginning-Of-Tape reflective marker
-- is encountered while skipping backward, the position of the tape will
-- be at the beginning of the tape, ready to read the first record.
-- MODE_ERROR is raised if the file is not open for reading. USE_ERROR
-- is raised if the file is in streaming mode.
procedure Skip_Records (File : File_Type;
Num_Records_To_Skip : Integer;
Obstacle : out Skip_Records_Obstacles;
Records_Skipped : out Natural);
procedure Skip_Records (File : File_Type;
Num_Records_To_Skip : Integer;
Obstacle : out Skip_Records_Obstacles;
Records_Skipped : out Natural;
Status : out Error_Status);
-- The SKIP_TAPE_MARKS procedures position the tape either forward or
-- backward until ABS (NUM_MARKS_TO_SKIP) have been skipped or
-- an obstacle has been encountered. A positive NUM_MARKS_TO_SKIP
-- implies skipping forward; negative implies skipping backward; zero
-- implies no movement. Two consecutive tape marks (a double tape mark)
-- is only an obstacle while skipping forward; in which case neither of
-- the tape marks is counted in MARKS_SKIPPED. If two consecutive tape
-- marks are encountered while skipping backward, it is not an obstacle
-- and they are treated as individual tape marks in MARKS_SKIPPED. If
-- the Beginning-Of-Tape reflective marker is encountered while skipping
-- backward, the position of the tape will be at the beginning of the
-- tape, ready to read the first record. If no obstacle was encountered,
-- the position of the tape is on the "other side" of the last tape mark.
-- MODE_ERROR is raised if the file is not open for reading. USE_ERROR
-- is raised if the file is in streaming mode.
procedure Skip_Tape_Marks (File : File_Type;
Num_Marks_To_Skip : Integer;
Obstacle : out Skip_Marks_Obstacles;
Marks_Skipped : out Natural);
procedure Skip_Tape_Marks (File : File_Type;
Num_Marks_To_Skip : Integer;
Obstacle : out Skip_Marks_Obstacles;
Marks_Skipped : out Natural;
Status : out Error_Status);
pragma Subsystem (Input_Output);
pragma Module_Name (4, 3214);
end Tape_Specific;