Re: Advanced file manipulation (multiple question)

[Jeffrey Carter <spam@spam.com>]

Steve wrote:

> If you use Ada.Direct_Io, there is a nice way to read the file in one read, 
> but it takes two steps.
>   First create an instance of Ada.Direct_Io of bytes.
>   Open the file as bytes.

System.Storage_Elements.Storage_Element.

>   Use the size function to get the size of the file.
>   Close the file
>   Create an instance of Ada.Direct_IO with an element that is the size of 
> the file (an array of bytes maybe?).

System.Storage_Elements.Storage_Array.

>   Read the file (a single read)
>   Close the file.
> 
> This approach tends to be quite fast since there is no iteration involved 
> over the bytes of the file.

Right, but this is limited to files that will fit in memory. The streams 
approach I described using varying-size chunks will work for all files, 
and is equivalent to this approach for smaller files. In addition, it 
does not require opening the file twice.

-- 
Jeff Carter
"What I wouldn't give for a large sock with horse manure in it."
Annie Hall
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