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--- CXAA016.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 the type File_Access is available in Ada.Text_IO, and that
--- objects of this type designate File_Type objects.
--- Check that function Set_Error will set the current default error file.
--- Check that versions of Ada.Text_IO functions Standard_Input,
--- Standard_Output, Standard_Error return File_Access values designating
--- the standard system input, output, and error files.
--- Check that versions of Ada.Text_IO functions Current_Input,
--- Current_Output, Current_Error return File_Access values designating
--- the current system input, output, and error files.
---
--- TEST DESCRIPTION:
--- This test tests the use of File_Access objects in referring
--- to File_Type objects, as well as several new functions that return
--- File_Access objects as results.
--- Four user-defined files are created. These files will be set to
--- function as current system input, output, and error files.
--- Data will be read from and written to these files during the
--- time at which they function as the current system files.
--- An array of File_Access objects will be defined. It will be
--- initialized using functions that return File_Access objects
--- referencing the Standard and Current Input, Output, and Error files.
--- This "saves" the initial system environment, which will be modified
--- to use the user-defined files as the current default Input, Output,
--- and Error files. At the end of the test, the data in this array
--- will be used to restore the initial system environment.
---
--- APPLICABILITY CRITERIA:
--- This test is applicable to implementations capable of supporting
--- external Text_IO files.
---
---
--- CHANGE HISTORY:
--- 25 May 95 SAIC Initial prerelease version.
--- 22 Apr 96 SAIC Incorporated reviewer comments for ACVC 2.1.
--- 26 Feb 97 PWB.CTA Allowed for non-support of some IO operations.
--- 18 Jan 99 RLB Repaired to allow Not_Applicable systems to
--- fail delete.
---!
-
-with Ada.Text_IO;
-package CXAA016_0 is
- New_Input_File,
- New_Output_File,
- New_Error_File_1,
- New_Error_File_2 : aliased Ada.Text_IO.File_Type;
-end CXAA016_0;
-
-
-with Report;
-with Ada.Exceptions;
-with Ada.Text_IO; use Ada.Text_IO;
-with CXAA016_0; use CXAA016_0;
-
-procedure CXAA016 is
-
- Non_Applicable_System : exception;
- No_Reset : exception;
- Not_Applicable_System : Boolean := False;
-
- procedure Delete_File ( A_File : in out Ada.Text_IO.File_Type;
- ID_Num : in Integer ) is
- begin
- if not Ada.Text_IO.Is_Open ( A_File ) then
- Ada.Text_IO.Open ( A_File,
- Ada.Text_IO.In_File,
- Report.Legal_File_Name ( ID_Num ) );
- end if;
- Ada.Text_IO.Delete ( A_File );
- exception
- when Ada.Text_IO.Name_Error =>
- if Not_Applicable_System then
- null; -- File probably wasn't created.
- else
- Report.Failed ( "Can't open file for Text_IO" );
- end if;
- when Ada.Text_IO.Use_Error =>
- if Not_Applicable_System then
- null; -- File probably wasn't created.
- else
- Report.Failed ( "Delete not properly implemented for Text_IO" );
- end if;
- when others =>
- Report.Failed ( "Unexpected exception in Delete_File" );
- end Delete_File;
-
-begin
-
- Report.Test ("CXAA016", "Check that the type File_Access is available " &
- "in Ada.Text_IO, and that objects of this " &
- "type designate File_Type objects");
- Test_Block:
- declare
-
- use Ada.Exceptions;
-
- type System_File_Array_Type is
- array (Integer range <>) of File_Access;
-
- -- Fill the following array with the File_Access results of six
- -- functions.
-
- Initial_Environment : System_File_Array_Type(1..6) :=
- ( Standard_Input,
- Standard_Output,
- Standard_Error,
- Current_Input,
- Current_Output,
- Current_Error );
-
- New_Input_Ptr : File_Access := New_Input_File'Access;
- New_Output_Ptr : File_Access := New_Output_File'Access;
- New_Error_Ptr : File_Access := New_Error_File_1'Access;
-
- Line : String(1..80);
- Length : Natural := 0;
-
- Line_1 : constant String := "This is the first line in the Output file";
- Line_2 : constant String := "This is the next line in the Output file";
- Line_3 : constant String := "This is the first line in Error file 1";
- Line_4 : constant String := "This is the next line in Error file 1";
- Line_5 : constant String := "This is the first line in Error file 2";
- Line_6 : constant String := "This is the next line in Error file 2";
-
-
-
- procedure New_File (The_File : in out File_Type;
- Mode : in File_Mode;
- Next : in Integer) is
- begin
- Create (The_File, Mode, Report.Legal_File_Name(Next));
- exception
- -- The following two exceptions may be raised if a system is not
- -- capable of supporting external Text_IO files. The handler will
- -- raise a user-defined exception which will result in a
- -- Not_Applicable result for the test.
- when Use_Error | Name_Error => raise Non_Applicable_System;
- end New_File;
-
-
-
- procedure Check_Initial_Environment (Env : System_File_Array_Type) is
- begin
- -- Check that the system has defined the following sources/
- -- destinations for input/output/error, and that the six functions
- -- returning File_Access values are available.
- if not (Env(1) = Standard_Input and
- Env(2) = Standard_Output and
- Env(3) = Standard_Error and
- Env(4) = Current_Input and
- Env(5) = Current_Output and
- Env(6) = Current_Error)
- then
- Report.Failed("At the start of the test, the Standard and " &
- "Current File_Access values associated with " &
- "system Input, Output, and Error files do " &
- "not correspond");
- end if;
- end Check_Initial_Environment;
-
-
-
- procedure Load_Input_File (Input_Ptr : in File_Access) is
- begin
- -- Load data into the file that will function as the user-defined
- -- system input file.
- Put_Line(Input_Ptr.all, Line_1);
- Put_Line(Input_Ptr.all, Line_2);
- Put_Line(Input_Ptr.all, Line_3);
- Put_Line(Input_Ptr.all, Line_4);
- Put_Line(Input_Ptr.all, Line_5);
- Put_Line(Input_Ptr.all, Line_6);
- end Load_Input_File;
-
-
-
- procedure Restore_Initial_Environment
- (Initial_Env : System_File_Array_Type) is
- begin
- -- Restore the Current Input, Output, and Error files to their
- -- original states.
-
- Set_Input (Initial_Env(4).all);
- Set_Output(Initial_Env(5).all);
- Set_Error (Initial_Env(6).all);
-
- -- At this point, the user-defined files that were functioning as
- -- the Current Input, Output, and Error files have been replaced in
- -- that capacity by the state of the original environment.
-
- declare
-
- -- Capture the state of the current environment.
-
- Current_Env : System_File_Array_Type (1..6) :=
- (Standard_Input, Standard_Output, Standard_Error,
- Current_Input, Current_Output, Current_Error);
- begin
-
- -- Compare the current environment with that of the saved
- -- initial environment.
-
- if Current_Env /= Initial_Env then
- Report.Failed("Restored file environment was not the same " &
- "as the initial file environment");
- end if;
- end;
- end Restore_Initial_Environment;
-
-
-
- procedure Verify_Files (O_File, E_File_1, E_File_2 : in File_Type) is
- Str_1, Str_2, Str_3, Str_4, Str_5, Str_6 : String (1..80);
- Len_1, Len_2, Len_3, Len_4, Len_5, Len_6 : Natural;
- begin
-
- -- Get the lines that are contained in all the files, and verify
- -- them against the expected results.
-
- Get_Line(O_File, Str_1, Len_1); -- The user defined output file
- Get_Line(O_File, Str_2, Len_2); -- should contain two lines of data.
-
- if Str_1(1..Len_1) /= Line_1 or
- Str_2(1..Len_2) /= Line_2
- then
- Report.Failed("Incorrect results from Current_Output file");
- end if;
-
- Get_Line(E_File_1, Str_3, Len_3); -- The first error file received
- Get_Line(E_File_1, Str_4, Len_4); -- two lines of data originally,
- Get_Line(E_File_1, Str_5, Len_5); -- then had two additional lines
- Get_Line(E_File_1, Str_6, Len_6); -- appended from the second error
- -- file.
- if Str_3(1..Len_3) /= Line_3 or
- Str_4(1..Len_4) /= Line_4 or
- Str_5(1..Len_5) /= Line_5 or
- Str_6(1..Len_6) /= Line_6
- then
- Report.Failed("Incorrect results from first Error file");
- end if;
-
- Get_Line(E_File_2, Str_5, Len_5); -- The second error file
- Get_Line(E_File_2, Str_6, Len_6); -- received two lines of data.
-
- if Str_5(1..Len_5) /= Line_5 or
- Str_6(1..Len_6) /= Line_6
- then
- Report.Failed("Incorrect results from second Error file");
- end if;
-
- end Verify_Files;
-
-
-
- begin
-
- Check_Initial_Environment (Initial_Environment);
-
- -- Create user-defined text files that will be set to serve as current
- -- system input, output, and error files.
-
- New_File (New_Input_File, Out_File, 1); -- Will be reset prior to use.
- New_File (New_Output_File, Out_File, 2);
- New_File (New_Error_File_1, Out_File, 3);
- New_File (New_Error_File_2, Out_File, 4);
-
- -- Enter several lines of text into the new input file. This file will
- -- be reset to mode In_File to function as the current system input file.
- -- Note: File_Access value used as parameter to this procedure.
-
- Load_Input_File (New_Input_Ptr);
-
- -- Reset the New_Input_File to mode In_File, to allow it to act as the
- -- current system input file.
-
- Reset1:
- begin
- Reset (New_Input_File, In_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to In_File not supported for Text_IO - 1" );
- raise No_Reset;
- end Reset1;
-
- -- Establish new files that will function as the current system Input,
- -- Output, and Error files.
-
- Set_Input (New_Input_File);
- Set_Output(New_Output_Ptr.all);
- Set_Error (New_Error_Ptr.all);
-
- -- Perform various file processing tasks, exercising specific new
- -- Text_IO functionality.
- --
- -- Read two lines from Current_Input and write them to Current_Output.
-
- for i in 1..2 loop
- Get_Line(Current_Input, Line, Length);
- Put_Line(Current_Output, Line(1..Length));
- end loop;
-
- -- Read two lines from Current_Input and write them to Current_Error.
-
- for i in 1..2 loop
- Get_Line(Current_Input, Line, Length);
- Put_Line(Current_Error, Line(1..Length));
- end loop;
-
- -- Reset the Current system error file.
-
- Set_Error (New_Error_File_2);
-
- -- Read two lines from Current_Input and write them to Current_Error.
-
- for i in 1..2 loop
- Get_Line(Current_Input, Line, Length);
- Put_Line(Current_Error, Line(1..Length));
- end loop;
-
- -- At this point in the processing, the new Output file, and each of
- -- the two Error files, contain two lines of data.
- -- Note that New_Error_File_1 has been replaced by New_Error_File_2
- -- as the current system error file, allowing New_Error_File_1 to be
- -- reset (Mode_Error raised otherwise).
- --
- -- Reset the first Error file to Append_File mode, and then set it to
- -- function as the current system error file.
-
- Reset2:
- begin
- Reset (New_Error_File_1, Append_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to Append_File not supported for Text_IO - 2" );
- raise No_Reset;
- end Reset2;
-
- Set_Error (New_Error_File_1);
-
- -- Reset the second Error file to In_File mode, then set it to become
- -- the current system input file.
-
- Reset3:
- begin
- Reset (New_Error_File_2, In_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to In_File not supported for Text_IO - 3" );
- raise No_Reset;
- end Reset3;
-
- New_Error_Ptr := New_Error_File_2'Access;
- Set_Input (New_Error_Ptr.all);
-
- -- Append all of the text lines (2) in the new current system input
- -- file onto the current system error file.
-
- while not End_Of_File(Current_Input) loop
- Get_Line(Current_Input, Line, Length);
- Put_Line(Current_Error, Line(1..Length));
- end loop;
-
- -- Restore the original system file environment, based upon the values
- -- stored at the start of this test.
- -- Check that the original environment has been restored.
-
- Restore_Initial_Environment (Initial_Environment);
-
- -- Reset all three files to In_File_Mode prior to verification.
- -- Note: If these three files had still been the designated Current
- -- Input, Output, or Error files for the system, a Reset
- -- operation at this point would raise Mode_Error.
- -- However, at this point, the environment has been restored to
- -- its original state, and these user-defined files are no longer
- -- designated as current system files, allowing a Reset.
-
- Reset4:
- begin
- Reset(New_Error_File_1, In_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to In_File not supported for Text_IO - 4" );
- raise No_Reset;
- end Reset4;
-
- Reset5:
- begin
- Reset(New_Error_File_2, In_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to In_File not supported for Text_IO - 5" );
- raise No_Reset;
- end Reset5;
-
- Reset6:
- begin
- Reset(New_Output_File, In_File);
- exception
- when Ada.Text_IO.Use_Error =>
- Report.Not_Applicable
- ( "Reset to In_File not supported for Text_IO - 6" );
- raise No_Reset;
- end Reset6;
-
- -- Check that all the files contain the appropriate data.
-
- Verify_Files (New_Output_File, New_Error_File_1, New_Error_File_2);
-
- exception
- when No_Reset =>
- null;
- when Non_Applicable_System =>
- Report.Not_Applicable("System not capable of supporting external " &
- "text files -- Name_Error/Use_Error raised " &
- "during text file creation");
- Not_Applicable_System := True;
- when The_Error : others =>
- Report.Failed ("The following exception was raised in the " &
- "Test_Block: " & Exception_Name(The_Error));
- end Test_Block;
-
- Delete_Block:
- begin
- Delete_File ( New_Input_File, 1 );
- Delete_File ( New_Output_File, 2 );
- Delete_File ( New_Error_File_1, 3 );
- Delete_File ( New_Error_File_2, 4 );
- end Delete_Block;
-
- Report.Result;
-
-end CXAA016;