Re: Ada.Streams.Stream_IO.Stream_Access

[Martin Krischik <martin@krischik.com>]

tmoran@acm.org wrote:

>>> > Ok, now I try to read from the huge file....and bang I am getting a
>>> > Constraint error. Is this a case that I just can't use ADA Streams on
>>> > files bigger then 2*31 bytes??
>   Works fine for me.  I read a 7GB file in 449,000 16K chunks.  What size
> chunks are you using?
> 
>>Not ADA related, but as a side issue, I am new to 64 bit
>>representation.
>>I understand it is split into High/Low (high-order 32 bits and low
>>order 32 bits
>>representations of the value). At the moment for files 3Gb in size,
>>High
>>is always zero, however, what happens if both High and Low have value?

>   The value is High*2**32+Low

And need to be stored in

type File_Position is range -2**32 .. +2*32-1;
for File_Integer'Size use 64;

or prehaps:

type File_Position is mod 2**64;
for File_Integer'Size use 64;

With Regards

Martin

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