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From: Gautier write-only <gautier_niouzes@hotmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Performance of the Streams 'Read and 'Write
Date: Tue, 17 Nov 2009 04:57:26 -0800 (PST)
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Date: 2009-11-17T04:57:26-08:00
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Hello,
I have an idea about how to patch GNAT on this.
Indeed, there is already a fast Stream exchangein GNAT, only for the
{Wide_}String types.
So, at the end of Find_Stream_Subprogram, exp_attr.adb, I would add
something like

if Is_Array_Type(Typ) and then
  Is_Bit_Packed_Array (Typ) and then
  Component_Size (Typ) = 8 and then
then
  Comp_Typ:= Component_Type (Typ);
  if Is_Modular_Integer_Type(Comp_Typ) and then
    [modulus ??] (Comp_Typ) = 2**8
  then
    [ go ahead with some unchecked conversion to String ]
    return [the right thing];
  end if;
end if;

Now, I have no experience with building GNAT, from the GCC tree.
Would someone like to help ?
Or is it easy to on Windows (currently, no Linux available on my
side) ?
TIA
_________________________________________________________
Gautier's Ada programming -- http://sf.net/users/gdemont/
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