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--- CXAC005.A
---
--- Grant of Unlimited Rights
---
--- The Ada Conformity Assessment Authority (ACAA) holds unlimited
--- rights in the software and documentation contained herein. Unlimited
--- rights are the same as those granted by the U.S. Government for older
--- parts of the Ada Conformity Assessment Test Suite, and are defined
--- in DFAR 252.227-7013(a)(19). By making this public release, the ACAA
--- intends to confer upon all recipients unlimited rights equal to those
--- held by the ACAA. 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 stream file positioning work as specified. (Defect Report
--- 8652/0055).
---
--- CHANGE HISTORY:
--- 12 FEB 2001 PHL Initial version.
--- 14 MAR 2001 RLB Readied for release; fixed Not_Applicable check
--- to terminate test gracefully.
---
---!
-with Ada.Streams.Stream_Io;
-use Ada.Streams;
-with Ada.Exceptions;
-use Ada.Exceptions;
-with Report;
-use Report;
-procedure CXAC005 is
-
- Incomplete : exception;
-
- procedure TC_Assert (Condition : Boolean; Message : String) is
- begin
- if not Condition then
- Failed (Message);
- end if;
- end TC_Assert;
-
- package Checked_Stream_Io is
-
- type File_Type (Max_Size : Stream_Element_Count) is limited private;
- function Stream_Io_File (File : File_Type) return Stream_Io.File_Type;
-
- procedure Create (File : in out File_Type;
- Mode : in Stream_Io.File_Mode := Stream_Io.Out_File;
- Name : in String := "";
- Form : in String := "");
-
- procedure Open (File : in out File_Type;
- Mode : in Stream_Io.File_Mode;
- Name : in String;
- Form : in String := "");
-
- procedure Close (File : in out File_Type);
- procedure Delete (File : in out File_Type);
-
- procedure Reset (File : in out File_Type;
- Mode : in Stream_Io.File_Mode);
- procedure Reset (File : in out File_Type);
-
- procedure Read (File : in out File_Type;
- Item : out Stream_Element_Array;
- Last : out Stream_Element_Offset;
- From : in Stream_Io.Positive_Count);
-
- procedure Read (File : in out File_Type;
- Item : out Stream_Element_Array;
- Last : out Stream_Element_Offset);
-
- procedure Write (File : in out File_Type;
- Item : in Stream_Element_Array;
- To : in Stream_Io.Positive_Count);
-
- procedure Write (File : in out File_Type;
- Item : in Stream_Element_Array);
-
- procedure Set_Index (File : in out File_Type;
- To : in Stream_Io.Positive_Count);
-
- function Index (File : in File_Type) return Stream_Io.Positive_Count;
-
- procedure Set_Mode (File : in out File_Type;
- Mode : in Stream_Io.File_Mode);
-
- private
- type File_Type (Max_Size : Stream_Element_Count) is
- record
- File : Stream_Io.File_Type;
- Index : Stream_Io.Positive_Count;
- Contents :
- Stream_Element_Array
- (Stream_Element_Offset (Ident_Int (1)) .. Max_Size);
- end record;
- end Checked_Stream_Io;
-
- package body Checked_Stream_Io is
-
- use Stream_Io;
-
- function Stream_Io_File (File : File_Type) return Stream_Io.File_Type is
- begin
- return File.File;
- end Stream_Io_File;
-
- procedure Create (File : in out File_Type;
- Mode : in Stream_Io.File_Mode := Stream_Io.Out_File;
- Name : in String := "";
- Form : in String := "") is
- begin
- Stream_Io.Create (File.File, Mode, Name, Form);
- File.Index := Stream_Io.Index (File.File);
- if Mode = Append_File then
- TC_Assert (File.Index = Stream_Io.Size (File.File) + 1,
- "Index /= Size + 1 -- Create - Append_File");
- else
- TC_Assert (File.Index = 1, "Index /= 1 -- Create - " &
- File_Mode'Image (Mode));
- end if;
- end Create;
-
- procedure Open (File : in out File_Type;
- Mode : in Stream_Io.File_Mode;
- Name : in String;
- Form : in String := "") is
- begin
- Stream_Io.Open (File.File, Mode, Name, Form);
- File.Index := Stream_Io.Index (File.File);
- if Mode = Append_File then
- TC_Assert (File.Index = Stream_Io.Size (File.File) + 1,
- "Index /= Size + 1 -- Open - Append_File");
- else
- TC_Assert (File.Index = 1, "Index /= 1 -- Open - " &
- File_Mode'Image (Mode));
- end if;
- end Open;
-
- procedure Close (File : in out File_Type) is
- begin
- Stream_Io.Close (File.File);
- end Close;
-
- procedure Delete (File : in out File_Type) is
- begin
- Stream_Io.Delete (File.File);
- end Delete;
-
- procedure Reset (File : in out File_Type;
- Mode : in Stream_Io.File_Mode) is
- begin
- Stream_Io.Reset (File.File, Mode);
- File.Index := Stream_Io.Index (File.File);
- if Mode = Append_File then
- TC_Assert (File.Index = Stream_Io.Size (File.File) + 1,
- "Index /= Size + 1 -- Reset - Append_File");
- else
- TC_Assert (File.Index = 1, "Index /= 1 -- Reset - " &
- File_Mode'Image (Mode));
- end if;
- end Reset;
-
- procedure Reset (File : in out File_Type) is
- begin
- Reset (File, Stream_Io.Mode (File.File));
- end Reset;
-
-
- procedure Read (File : in out File_Type;
- Item : out Stream_Element_Array;
- Last : out Stream_Element_Offset;
- From : in Stream_Io.Positive_Count) is
- begin
- Set_Index (File, From);
- Read (File, Item, Last);
- end Read;
-
- procedure Read (File : in out File_Type;
- Item : out Stream_Element_Array;
- Last : out Stream_Element_Offset) is
- Index : constant Stream_Element_Offset :=
- Stream_Element_Offset (File.Index);
- begin
- Stream_Io.Read (File.File, Item, Last);
- if Last < Item'Last then
- TC_Assert (Item (Item'First .. Last) =
- File.Contents (Index .. Index + Last - Item'First),
- "Incorrect data read from file - 1");
- TC_Assert (Count (Index + Last - Item'First) =
- Stream_Io.Size (File.File),
- "Read stopped before end of file");
- File.Index := Count (Index + Last - Item'First) + 1;
- else
- TC_Assert (Item = File.Contents (Index .. Index + Item'Length - 1),
- "Incorrect data read from file - 2");
- File.Index := File.Index + Item'Length;
- end if;
- end Read;
-
- procedure Write (File : in out File_Type;
- Item : in Stream_Element_Array;
- To : in Stream_Io.Positive_Count) is
- begin
- Set_Index (File, To);
- Write (File, Item);
- end Write;
-
- procedure Write (File : in out File_Type;
- Item : in Stream_Element_Array) is
- Index : constant Stream_Element_Offset :=
- Stream_Element_Offset (File.Index);
- begin
- Stream_Io.Write (File.File, Item);
- File.Contents (Index .. Index + Item'Length - 1) := Item;
- File.Index := File.Index + Item'Length;
- TC_Assert (File.Index = Stream_Io.Index (File.File),
- "Write failed to move the index");
- end Write;
-
- procedure Set_Index (File : in out File_Type;
- To : in Stream_Io.Positive_Count) is
- begin
- Stream_Io.Set_Index (File.File, To);
- File.Index := Stream_Io.Index (File.File);
- TC_Assert (File.Index = To, "Set_Index failed");
- end Set_Index;
-
- function Index (File : in File_Type) return Stream_Io.Positive_Count is
- New_Index : constant Count := Stream_Io.Index (File.File);
- begin
- TC_Assert (New_Index = File.Index, "Index changed unexpectedly");
- return New_Index;
- end Index;
-
- procedure Set_Mode (File : in out File_Type;
- Mode : in Stream_Io.File_Mode) is
- Old_Index : constant Count := File.Index;
- begin
- Stream_Io.Set_Mode (File.File, Mode);
- File.Index := Stream_Io.Index (File.File);
- if Mode = Append_File then
- TC_Assert (File.Index = Stream_Io.Size (File.File) + 1,
- "Index /= Size + 1 -- Set_Mode - Append_File");
- else
- TC_Assert (File.Index = Old_Index, "Set_Mode changed the index");
- end if;
- end Set_Mode;
-
- end Checked_Stream_Io;
-
- package Csio renames Checked_Stream_Io;
-
- F : Csio.File_Type (100);
- S : Stream_Element_Array (1 .. 10);
- Last : Stream_Element_Offset;
-
-begin
-
- Test ("CXAC005", "Check that stream file positioning work as specified");
-
- declare
- Name : constant String := Legal_File_Name;
- begin
- begin
- Csio.Create (F, Name => Name);
- exception
- when others =>
- Not_Applicable ("Files not supported - Creation with Out_File for Stream_IO");
- raise Incomplete;
- end;
-
- for I in Stream_Element range 1 .. 10 loop
- Csio.Write (F, ((1 => I + 2)));
- end loop;
- Csio.Write (F, (1 .. 15 => 11));
- Csio.Write (F, (1 .. 15 => 12), To => 15);
-
- Csio.Reset (F);
-
- for I in Stream_Element range 1 .. 10 loop
- Csio.Write (F, (1 => I));
- end loop;
- Csio.Write (F, (1 .. 15 => 13));
- Csio.Write (F, (1 .. 15 => 14), To => 15);
- Csio.Write (F, (1 => 90));
-
- Csio.Set_Mode (F, Stream_Io.In_File);
-
- Csio.Read (F, S, Last);
- Csio.Read (F, S, Last, From => 3);
- Csio.Read (F, S, Last, From => 28);
-
- Csio.Set_Mode (F, Stream_Io.Append_File);
- Csio.Write (F, (1 .. 5 => 88));
-
- Csio.Close (F);
-
- Csio.Open (F, Name => Name, Mode => Stream_Io.Append_File);
- Csio.Write (F, (1 .. 3 => 33));
-
- Csio.Set_Mode (F, Stream_Io.In_File);
- Csio.Read (F, S, Last, From => 20);
- Csio.Read (F, S, Last);
- Csio.Reset (F, Stream_Io.Out_File);
-
- Csio.Write (F, (1 .. 9 => 99));
-
- -- Check the contents of the entire file.
- declare
- S : Stream_Element_Array
- (1 .. Stream_Element_Offset
- (Stream_Io.Size (Csio.Stream_Io_File (F))));
- begin
- Csio.Reset (F, Stream_Io.In_File);
- Csio.Read (F, S, Last);
- end;
-
- Csio.Delete (F);
- end;
-
- Result;
-exception
- when Incomplete =>
- Report.Result;
- when E:others =>
- Report.Failed ("Unexpected exception raised - " & Exception_Name (E) &
- " - " & Exception_Message (E));
- Report.Result;
-
-end CXAC005;
-
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