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Date: Mon, 24 Apr 2006 16:33:03 +0200
From: Gautier <gautier@fakeaddress.nil>
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Subject: Re: Q: Index value in case of Ada.Streams.Stream_IO.End_Error
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Date: 2006-04-24T16:33:03+02:00
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Jean-Pierre Rosen:

>> Is there a RM-documented way to know the Index of a 
>> Ada.Streams.Stream_IO.File_Type
>> when it knocks the end of a file at reading it ?

> out parameter Last in function Read...
> 
> This gives you the number of bytes actually read.

You mean the _procedure_ Read, from Stream_IO ?

   procedure Read (File : in File_Type;
                   Item : out Stream_Element_Array;
                   Last : out Stream_Element_Offset);

Nice, but for my buffer I need to use the Read _attribute_ (13.13.2).

procedure S'Read( Stream : access Ada.Streams.Root_Stream_Type'Class;
                   Item : out T)

No "Last" there... If I try:

         IO_buf'Read( Ada.Streams.Stream_IO.Stream(infile), inbuf, last );

a compiler says as expected:
unz_io.adb:55:67: unexpected argument for "Read" attribute

Hence my question.
Mmmh, unless I redefine my buffer as a Stream_Element_Array.
Are you assuming that ?
_______________________________________________________________
Gautier         -- http://www.mysunrise.ch/users/gdm/index.htm
Ada programming -- http://www.mysunrise.ch/users/gdm/gsoft.htm

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