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|
-- CXA8003.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
-- Check that Append_File mode has not been added to package Direct_IO.
--
-- TEST DESCRIPTION:
-- This test uses a procedure to change the mode of an existing Direct_IO
-- file. The file descriptor is passed as a parameter, along with a
-- numeric indicator for the new mode. Based on the numeric parameter,
-- a Direct_IO.Reset is performed using a File_Mode'Value transformation
-- of a string constant into a File_Mode value. An attempt to reset a
-- Direct_IO file to mode Append_File should cause an Constraint_Error
-- to be raised, as Append_File mode has not been added to Direct_IO in
-- Ada 9X.
--
-- APPLICABILITY CRITERIA:
-- This test is applicable to all implementations supporting Direct_IO
-- files.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
-- 19 Feb 97 PWB.CTA Allowed for non-support of Reset for certain
-- modes.
--!
with Direct_IO;
with Report;
procedure CXA8003 is
Incomplete : exception;
begin
Report.Test ("CXA8003", "Check that Append_File mode has not " &
"been added to package Direct_IO");
Test_for_Direct_IO_Support:
declare
subtype String_Data_Type is String (1 .. 20);
type Numeric_Data_Type is range 1 .. 512;
type Composite_Data_Type is array (1 .. 3) of String_Data_Type;
type File_Data_Type is record
Data_Field_1 : String_Data_Type;
Data_Field_2 : Numeric_Data_Type;
Data_Field_3 : Composite_Data_Type;
end record;
package Dir_IO is new Direct_IO (File_Data_Type);
Data_File : Dir_IO.File_Type;
Dir_Filename : constant String := Report.Legal_File_Name;
begin
-- An application creates a text file with mode Out_File.
-- Use_Error will be raised if Direct_IO operations or external
-- files are not supported.
Dir_IO.Create (Data_File,
Dir_IO.Out_File,
Dir_Filename);
Change_File_Mode:
declare
TC_Append_Test_Executed : Boolean := False;
type Mode_Selection_Type is ( A, I, IO, O );
procedure Change_Mode (File : in out Dir_IO.File_Type;
To : in Mode_Selection_Type) is
begin
case To is
when A =>
TC_Append_Test_Executed := True;
Dir_IO.Reset
(File, Dir_IO.File_Mode'Value("Append_File"));
when I =>
begin
Dir_IO.Reset
(File, Dir_IO.File_Mode'Value("In_File"));
exception
when Dir_IO.Use_Error =>
Report.Not_Applicable
("Reset to In_File not supported: Direct_IO");
raise Incomplete;
end;
when IO =>
begin
Dir_IO.Reset
(File, Dir_IO.File_Mode'Value("Inout_File"));
exception
when Dir_IO.Use_Error =>
Report.Not_Applicable
("Reset to InOut_File not supported: Direct_IO");
raise Incomplete;
end;
when O =>
begin
Dir_IO.Reset
(File, Dir_IO.File_Mode'Value("Out_File"));
exception
when Dir_IO.Use_Error =>
Report.Not_Applicable
("Reset to Out_File not supported: Direct_IO");
raise Incomplete;
end;
end case;
end Change_Mode;
begin
-- At some point in the processing, the application may call a
-- procedure to change the mode of the file (perhaps for
-- additional data entry, data verification, etc.). It is at
-- this point that a use of Append_File mode for a Direct_IO
-- file would cause an exception.
for I in reverse Mode_Selection_Type loop
Change_Mode (Data_File, I);
Report.Comment
("Mode changed to " &
Dir_IO.File_Mode'Image (Dir_IO.Mode (Data_File)));
end loop;
Report.Failed("No error raised on change to Append_File mode");
exception
-- A handler has been provided in the application, which
-- handles the constraint error, allowing processing to
-- continue.
when Constraint_Error =>
if TC_Append_Test_Executed then
Report.Comment ("Constraint_Error correctly raised on " &
"attempted Append_File mode selection " &
"for a Direct_IO file");
else
Report.Failed ("Append test was not executed");
end if;
when Incomplete => raise;
when others => Report.Failed ("Unexpected exception raised");
end Change_File_Mode;
Final_Block:
begin
if Dir_IO.Is_Open (Data_File) then
Dir_IO.Delete (Data_File);
else
Dir_IO.Open (Data_File, Dir_IO.In_File, Dir_Filename);
Dir_IO.Delete (Data_File);
end if;
exception
when others =>
Report.Failed ("Delete not properly supported: Direct_IO");
end Final_Block;
exception
-- Since Use_Error or Name_Error can be raised if, for the
-- specified mode, the environment does not support Direct_IO
-- operations, the following handlers are included:
when Dir_IO.Name_Error =>
Report.Not_Applicable("Name_Error raised on Direct IO Create");
when Dir_IO.Use_Error =>
Report.Not_Applicable("Use_Error raised on Direct IO Create");
when others =>
Report.Failed
("Unexpected exception raised on Direct IO Create");
end Test_for_Direct_IO_Support;
Report.Result;
exception
when Incomplete =>
Report.Result;
end CXA8003;
|
