From: Gautier write-only <gautier_niouzes@hotmail.com>
Subject: Re: Performance of the Streams 'Read and 'Write
Date: Tue, 17 Nov 2009 04:57:26 -0800 (PST)
Date: 2009-11-17T04:57:26-08:00 [thread overview]
Message-ID: <e11d679a-d4a5-4660-9a66-75276224e168@k17g2000yqh.googlegroups.com> (raw)
In-Reply-To: e93ea909-9b8e-44c6-a537-fd68ed47cbc4@z41g2000yqz.googlegroups.com
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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next prev parent reply other threads:[~2009-11-17 12:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-29 23:29 Performance of the Streams 'Read and 'Write Gautier write-only
2009-10-30 0:39 ` Jeffrey R. Carter
2009-10-30 8:58 ` Gautier write-only
2009-10-30 19:12 ` Jeffrey R. Carter
2009-10-31 23:46 ` Gautier write-only
2009-11-01 21:38 ` Gautier write-only
2009-11-02 21:32 ` Randy Brukardt
2009-10-30 3:36 ` Georg Bauhaus
2009-10-30 9:13 ` Gautier write-only
2009-11-02 21:37 ` Randy Brukardt
2009-11-02 22:16 ` Gautier write-only
2009-10-30 13:40 ` Gautier write-only
2009-11-02 22:19 ` Gautier write-only
2009-11-17 12:57 ` Gautier write-only [this message]
2009-11-17 13:26 ` Ludovic Brenta
2009-11-17 20:19 ` Building GNAT on Windows (Was: Re: Performance of the Streams 'Read and 'Write) Tero Koskinen
2009-11-18 10:55 ` Gautier write-only
2009-11-26 13:23 ` Performance of the Streams 'Read and 'Write Gautier write-only
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