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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/ada/acats/tests/cxa/cxac003.a
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+-- CXAC003.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 correct exceptions are raised when improperly
+-- manipulating stream file objects.
+--
+-- TEST DESCRIPTION:
+-- This test is designed to focus on Stream_IO file manipulation
+-- exceptions. Several potentially common user errors are examined in
+-- the test:
+--
+-- A Status_Error should be raised whenever an attempt is made to perform
+-- an operation on a file that is closed.
+--
+-- A Status_Error should be raised when an attempt is made to open a
+-- stream file that is currently open.
+--
+-- A Mode_Error should be raised when attempting to read from (use the
+-- 'Read attribute) on an Out_File or Append_Mode file.
+--
+-- A Mode_Error should be raised when checking for End Of File on a
+-- file with mode Out_File or Append_Mode.
+--
+-- A Mode_Error should be raised when attempting to write to (use the
+-- 'Output attribute) on a file with mode In_File.
+--
+-- A Name_Error should be raised when the string provided to the Name
+-- parameter of an Open operation does not allow association of an
+-- external file.
+--
+-- APPLICABILITY CRITERIA:
+-- This test is applicable to all implementations capable of supporting
+-- external Stream_IO files.
+--
+--
+-- CHANGE HISTORY:
+-- 06 Dec 94 SAIC ACVC 2.0
+-- 25 Feb 97 PWB.CTA Allowed for non-support of some IO operations
+-- 02 Mar 01 PHL Check that Ada.Streams.Stream_IO.Stream raises
+-- Status_Error if the file is not open. (DR 8652/
+-- 0056).
+-- 15 Mar 01 RLB Readied for release.
+--!
+
+with Ada.Streams.Stream_IO;
+with Report;
+
+procedure CXAC003 is
+
+ Stream_File_Object : Ada.Streams.Stream_IO.File_Type;
+ Stream_Access_Value : Ada.Streams.Stream_IO.Stream_Access;
+ Stream_Filename : constant String :=
+ Report.Legal_File_Name ( Nam => "CXAC003" );
+ Incomplete : exception;
+
+begin
+
+ Report.Test ("CXAC003", "Check that the correct exceptions are " &
+ "raised when improperly manipulating stream " &
+ "file objects");
+
+ Test_for_Stream_IO_Support:
+ begin
+ -- If an implementation does not support Stream_IO in a particular
+ -- environment, the exception Use_Error or Name_Error will be raised on
+ -- calls to various Stream_IO operations. This block statement
+ -- encloses a call to Create, which should produce an exception in a
+ -- non-supportive environment. These exceptions will be handled to
+ -- produce a Not_Applicable result.
+
+ Ada.Streams.Stream_IO.Create (Stream_File_Object,
+ Ada.Streams.Stream_IO.Out_File,
+ Stream_Filename);
+
+ exception
+
+ when Ada.Streams.Stream_IO.Use_Error | Ada.Streams.Stream_IO.Name_Error =>
+ Report.Not_Applicable
+ ( "Files not supported - Create as Out_File for Stream_IO" );
+ raise Incomplete;
+
+ end Test_for_Stream_IO_Support;
+
+ Operational_Test_Block:
+ begin
+ -- A potentially common error in a file processing environment
+ -- is to attempt to perform an operation on a stream file that is
+ -- not currently open. Status_Error should be raised in this case.
+ Check_Status_Error:
+ begin
+ Ada.Streams.Stream_IO.Close (Stream_File_Object);
+ -- Attempt to reset a file that is closed.
+ Ada.Streams.Stream_IO.Reset (Stream_File_Object,
+ Ada.Streams.Stream_IO.Out_File);
+ Report.Failed ("Exception not raised on Reset of closed file");
+ exception
+ when Ada.Streams.Stream_IO.Status_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 1");
+ end Check_Status_Error;
+
+ -- A similar error is to use Ada.Streams.Stream_IO.Stream
+ -- to attempt to perform an operation on a stream file that is
+ -- not currently open. Status_Error should be raised in this case.
+ -- (Defect Report 8652/0046, as reflected in Technical Corrigendum 1.)
+ Check_Status_Error2:
+ begin
+ -- Ensure that the file is not open.
+ if Ada.Streams.Stream_Io.Is_Open (Stream_File_Object) then
+ Ada.Streams.Stream_Io.Close (Stream_File_Object);
+ end if;
+ Stream_Access_Value :=
+ Ada.Streams.Stream_Io.Stream (Stream_File_Object);
+ Report.Failed ("Exception not raised on Stream of closed file");
+ exception
+ when Ada.Streams.Stream_Io.Status_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 2");
+ end Check_Status_Error2;
+
+ -- Another potentially common error in a file processing environment
+ -- is to attempt to Open a stream file that is currently open.
+ -- Status_Error should be raised in this case.
+ Check_Status_Error3:
+ begin
+ -- Ensure that the file is open.
+ if not Ada.Streams.Stream_IO.Is_Open (Stream_File_Object) then
+ Ada.Streams.Stream_IO.Open (Stream_File_Object,
+ Ada.Streams.Stream_IO.In_File,
+ Stream_Filename);
+ end if;
+ Ada.Streams.Stream_IO.Open (Stream_File_Object,
+ Ada.Streams.Stream_IO.In_File,
+ Stream_Filename);
+ Report.Failed ("Exception not raised on Open of open file");
+ exception
+ when Ada.Streams.Stream_IO.Status_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 3");
+ end Check_Status_Error3;
+
+ -- Another example of a potential error occurring in a file
+ -- processing environment is to attempt to use the 'Read attribute
+ -- on a stream file that is currently in Out_File or Append_File
+ -- mode. Mode_Error should be raised in both of these cases.
+ Check_Mode_Error:
+ declare
+ Int_Var : Integer := -10;
+ begin
+
+ Reset1:
+ begin
+ Ada.Streams.Stream_IO.Reset (Stream_File_Object,
+ Ada.Streams.Stream_IO.Out_File);
+ exception
+ when Ada.Streams.Stream_IO.Use_Error =>
+ Report.Not_Applicable
+ ( "Reset to Out_File not supported for Stream_IO - 1" );
+ raise Incomplete;
+ end Reset1;
+
+ Stream_Access_Value :=
+ Ada.Streams.Stream_IO.Stream (Stream_File_Object);
+ Integer'Write (Stream_Access_Value, Int_Var);
+
+ -- File contains an integer value, but is of mode Out_File.
+ Integer'Read (Stream_Access_Value, Int_Var);
+ Report.Failed ("Exception not raised by 'Read of Out_File");
+ exception
+ when Incomplete =>
+ raise;
+ when Ada.Streams.Stream_IO.Mode_Error =>
+ null;
+ Try_Read:
+ begin
+ Reset2:
+ begin
+ Ada.Streams.Stream_IO.Reset
+ (Stream_File_Object, Ada.Streams.Stream_IO.Append_File);
+ exception
+ when Ada.Streams.Stream_IO.Use_Error =>
+ Report.Not_Applicable
+ ( "Reset to Append_File not supported " &
+ "for Stream_IO - 2" );
+ raise Incomplete;
+ end Reset2;
+
+ Integer'Write (Stream_Access_Value, Int_Var);
+ -- Attempt read from Append_File mode file.
+ Integer'Read (Stream_Access_Value, Int_Var);
+ Report.Failed
+ ("Exception not raised by 'Read of Append file");
+ exception
+ when Incomplete =>
+ null;
+ when Ada.Streams.Stream_IO.Mode_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 4b");
+ end Try_Read;
+
+ when others => Report.Failed ("Incorrect exception raised - 4a");
+ end Check_Mode_Error;
+
+ -- Another example of a this type of potential error is to attempt
+ -- to check for End Of File on a stream file that is currently in
+ -- Out_File or Append_File mode. Mode_Error should also be raised
+ -- in both of these cases.
+ Check_End_File:
+ declare
+ Test_Boolean : Boolean := False;
+ begin
+ Reset3:
+ begin
+ Ada.Streams.Stream_IO.Reset (Stream_File_Object,
+ Ada.Streams.Stream_IO.Out_File);
+ exception
+ when Ada.Streams.Stream_IO.Use_Error =>
+ Report.Not_Applicable
+ ( "Reset to Out_File not supported for Stream_IO - 3" );
+ raise Incomplete;
+ end Reset3;
+
+ Test_Boolean :=
+ Ada.Streams.Stream_IO.End_Of_File (Stream_File_Object);
+ Report.Failed ("Exception not raised by EOF on Out_File");
+ exception
+ when Incomplete =>
+ null;
+ when Ada.Streams.Stream_IO.Mode_Error =>
+ null;
+ EOF_For_Append_File:
+ begin
+ Reset4:
+ begin
+ Ada.Streams.Stream_IO.Reset
+ (Stream_File_Object, Ada.Streams.Stream_IO.Append_File);
+ exception
+ when Ada.Streams.Stream_IO.Use_Error =>
+ Report.Not_Applicable
+ ( "Reset to Append_File not supported " &
+ "for Stream_IO - 4" );
+ raise Incomplete;
+ end Reset4;
+
+ Test_Boolean :=
+ Ada.Streams.Stream_IO.End_Of_File (Stream_File_Object);
+ Report.Failed
+ ("Exception not raised by EOF of Append file");
+ exception
+ when Incomplete =>
+ raise;
+ when Ada.Streams.Stream_IO.Mode_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 5b");
+ end EOF_For_Append_File;
+
+ when others => Report.Failed ("Incorrect exception raised - 5a");
+ end Check_End_File;
+
+
+
+ -- In a similar situation to the above cases for attribute 'Read,
+ -- an attempt to use the 'Output attribute on a stream file that
+ -- is currently in In_File mode should result in Mode_Error being
+ -- raised.
+ Check_Output_Mode_Error:
+ begin
+ Reset5:
+ begin
+ Ada.Streams.Stream_IO.Reset (Stream_File_Object,
+ Ada.Streams.Stream_IO.In_File);
+ exception
+ when Ada.Streams.Stream_IO.Use_Error =>
+ Report.Not_Applicable
+ ( "Reset to In_File not supported for Stream_IO - 6" );
+ raise Incomplete;
+ end Reset5;
+
+ Stream_Access_Value :=
+ Ada.Streams.Stream_IO.Stream (Stream_File_Object);
+ String'Output (Stream_Access_Value, "User-Oriented String");
+ Report.Failed ("Exception not raised by 'Output to In_File");
+ exception
+ when Incomplete =>
+ null;
+ when Ada.Streams.Stream_IO.Mode_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 6");
+ end Check_Output_Mode_Error;
+
+ -- Any case of attempting to Open a stream file with a string for
+ -- the parameter Name that does not allow the identification of an
+ -- external file will result in the exception Name_Error being
+ -- raised.
+ Check_Illegal_File_Name:
+ begin
+ if Ada.Streams.Stream_IO.Is_Open (Stream_File_Object) then
+ Ada.Streams.Stream_IO.Close (Stream_File_Object);
+ end if;
+ -- No external file exists with this filename, allowing no
+ -- association with an internal file object, resulting in the
+ -- raising of the exception Name_Error.
+ Ada.Streams.Stream_IO.Open(File => Stream_File_Object,
+ Mode => Ada.Streams.Stream_IO.Out_File,
+ Name => Report.Legal_File_Name(2));
+ Report.Failed ("Exception not raised by bad filename on Open");
+ exception
+ when Ada.Streams.Stream_IO.Name_Error =>
+ null;
+ when others =>
+ Report.Failed ("Incorrect exception raised - 7");
+ end Check_Illegal_File_Name;
+
+ exception
+ when Incomplete =>
+ null;
+ when others =>
+ Report.Failed ("Unexpected exception in Operational Test Block");
+
+ end Operational_Test_Block;
+
+ Deletion:
+ begin
+ if Ada.Streams.Stream_IO.Is_Open (Stream_File_Object) then
+ Ada.Streams.Stream_IO.Delete (Stream_File_Object);
+ else
+ Ada.Streams.Stream_IO.Open (Stream_File_Object,
+ Ada.Streams.Stream_IO.Out_File,
+ Stream_Filename);
+ Ada.Streams.Stream_IO.Delete (Stream_File_Object);
+ end if;
+ exception
+ when others =>
+ Report.Failed
+ ( "Delete not properly implemented for Stream_IO" );
+ end Deletion;
+
+ Report.Result;
+
+exception
+ when Incomplete =>
+ Report.Result;
+ when others =>
+ Report.Failed ( "Unexpected exception" );
+ Report.Result;
+
+end CXAC003;