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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
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top - downloadIndex: ┃ T V ┃
Length: 6539 (0x198b)
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 System;
with Action;
with Directory;
with Io_Exceptions;
package Device_Independent_Io is
-- Device_Independent_IO is designed to provide a uniform method of
-- accessing sequential devices, including files, terminals, windows,
-- printers, and tape drives. Its clients are expected to be Text_IO and
-- Sequential_IO, though there may be others.
-- The assumption is made that devices deal in bytes or characters rather
-- than elemental types.
pragma Subsystem (Input_Output);
pragma Module_Name (4, 3208);
type File_Type is private;
type File_Mode is (In_File, Out_File);
subtype Class is Directory.Class;
subtype Subclass is Directory.Subclass;
subtype Version is Directory.Version;
subtype Byte is System.Byte;
subtype Byte_String is System.Byte_String;
procedure Open (File : in out File_Type;
Mode : File_Mode;
Name : String;
Form : String := "";
With_Class : Directory.Class := Directory.Nil;
Action_Id : Action.Id := Action.Null_Id);
procedure Open (File : in out File_Type;
Mode : File_Mode;
Object : Version;
Form : String := "";
With_Class : Directory.Class := Directory.Nil;
Action_Id : Action.Id := Action.Null_Id);
procedure Append (File : in out File_Type;
Name : String;
Form : String := "";
With_Class : Directory.Class := Directory.Nil;
Action_Id : Action.Id := Action.Null_Id);
procedure Append (File : in out File_Type;
Object : Version;
Form : String := "";
With_Class : Directory.Class := Directory.Nil;
Action_Id : Action.Id := Action.Null_Id);
-- open the object for output and position at end of file
procedure Create (File : in out File_Type;
Mode : File_Mode := Out_File;
Name : String := "";
Form : String := "";
With_Class : Class := Directory.Nil;
With_Subclass : Subclass := Directory.Nil;
Action_Id : Action.Id := Action.Null_Id);
-- creates the named object, if it currently does not exist
-- declaration of a new version is dependent on the class of the object
-- if object does not exists, and class is nil, file is assumed.
procedure Close (File : in out File_Type);
procedure Delete (File : in out File_Type);
procedure Reset (File : in out File_Type; Mode : File_Mode);
procedure Reset (File : in out File_Type);
procedure Save (File : File_Type; Immediate_Effect : Boolean := True);
-- Save the current contents of the file, but leave it open
-- Immediate_Effect => don't wait until the action is committed
function Mode (File : File_Type) return File_Mode;
function Name (File : File_Type) return String;
function Form (File : File_Type) return String;
function Get_Class (File : File_Type) return Class;
function Get_Subclass (File : File_Type) return Subclass;
function Get_Version (File : File_Type) return Version;
function Get_Action (File : File_Type) return Action.Id;
function Is_Open (File : File_Type) return Boolean;
function End_Of_File (File : File_Type) return Boolean;
procedure Read (File : File_Type;
Item : out Byte_String;
Count : out Natural);
procedure Read (File : File_Type; Item : out Byte);
procedure Read (File : File_Type; Item : out String; Count : out Natural);
procedure Read (File : File_Type; Item : out Character);
procedure Write (File : File_Type; Item : Byte_String);
procedure Write (File : File_Type; Item : Byte);
procedure Write (File : File_Type; Item : String);
procedure Write (File : File_Type; Item : Character);
function Is_Interactive (File : File_Type) return Boolean;
-- The user-visible function that determines whether or not a file
-- is interactive.
function Is_Empty (File : File_Type) return Boolean;
-- Determine if the file has any contents
generic
type Derived_File_Type is limited private;
-- Only works for types derived from Device_Independent_IO.File_Type
pragma Must_Be_Constrained (Derived_File_Type);
package File_Type_Conversions is
function From_Standard (File : File_Type) return Derived_File_Type;
function To_Standard (File : Derived_File_Type) return File_Type;
end File_Type_Conversions;
-- Ability to convert between Device_Independent_IO File_Type and those
-- used by its clients.
-- Provided principally to allow setting of options for device_specific
-- packages that may be used in conjunction with Text_IO, etc.
-- Specific clients may buffer data in ways not visible to
-- Device_Independent_IO, so this is a generally dangerous operation for
-- Input/Output operations.
generic
type Element_Type is private;
package Type_Specific_Operations is
function Read (File : File_Type) return Element_Type;
procedure Read (File : File_Type; Item : out Element_Type);
procedure Write (File : File_Type; Item : Element_Type);
end Type_Specific_Operations;
-- Type_Specific_Operations make it possible to implement the equivalent
-- of Sequential_IO or Polymorphic_Sequential_IO.
-- Exceptions
Status_Error : exception renames Io_Exceptions.Status_Error;
Mode_Error : exception renames Io_Exceptions.Mode_Error;
Name_Error : exception renames Io_Exceptions.Name_Error;
Use_Error : exception renames Io_Exceptions.Use_Error;
Device_Error : exception renames Io_Exceptions.Device_Error;
End_Error : exception renames Io_Exceptions.End_Error;
Data_Error : exception renames Io_Exceptions.Data_Error;
end Device_Independent_Io;