88 lines
2.3 KiB
Ada
88 lines
2.3 KiB
Ada
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package body Stream is
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------------------------------------------------------------------
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procedure Open (Stream: in out String_Input_Stream_Record) is
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begin
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Ada.Text_IO.Put_Line ("OPEN STRING STREAM");
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Stream.Pos := 0;
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end Open;
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procedure Close (Stream: in out String_Input_Stream_Record) is
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begin
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Ada.Text_IO.Put_Line ("CLOSE STRING STREAM");
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Stream.Pos := Stream.Str'Last;
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end Close;
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procedure Read (Stream: in out String_Input_Stream_Record;
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Data: out S.Object_String;
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Last: out Standard.Natural) is
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Avail: Standard.Natural;
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begin
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Avail := Stream.Str'Last - Stream.Pos;
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if Avail <= 0 then
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-- EOF
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Last := Data'First - 1;
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else
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if Avail > Data'Length then
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Avail := Data'Length;
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end if;
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Data(Data'First .. Avail) := Stream.Str(Stream.Pos + 1..Stream.Pos + Avail);
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Stream.Pos := Stream.Pos + Avail;
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Last := Data'First + Avail - 1;
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end if;
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end Read;
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procedure Write (Stream: in out String_Input_Stream_Record;
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Data: out S.Object_String;
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Last: out Standard.Natural) is
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begin
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--raise S.Stream_Error;
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Last := Data'First - 1;
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end Write;
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------------------------------------------------------------------
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procedure Open (Stream: in out File_Stream_Record) is
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begin
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Ada.Text_IO.Put_Line ("OPEN File STREAM");
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Ada.Text_IO.Open (Stream.Handle, Ada.Text_IO.In_File, Stream.Name.all);
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end Open;
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procedure Close (Stream: in out File_Stream_Record) is
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begin
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Ada.Text_IO.Put_Line ("CLOSE File STREAM");
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Ada.Text_IO.Close (Stream.Handle);
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end Close;
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procedure Read (Stream: in out File_Stream_Record;
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Data: out S.Object_String;
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Last: out Standard.Natural) is
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begin
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for I in Data'First .. Data'Last loop
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begin
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Ada.Text_IO.Get_Immediate (Stream.Handle, Data(I));
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exception
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when Ada.Text_IO.End_Error =>
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Last := I - 1;
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return;
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-- other exceptions must be just raised to indicate errors
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end;
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end loop;
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Last := Data'Last;
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end Read;
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procedure Write (Stream: in out File_Stream_Record;
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Data: out S.Object_String;
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Last: out Standard.Natural) is
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begin
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--raise S.Stream_Error;
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Last := Data'First - 1;
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end Write;
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------------------------------------------------------------------
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end Stream;
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