Proper way to work with huge binary files

Jonathan M Davis jmdavisProg at
Tue Jan 24 09:17:17 PST 2012

On Tuesday, January 24, 2012 15:53:48 C wrote:
> Hello all.
> After a quick recce on the main D site I couldn't find a how-to for large
> binary files.
> Suppose I'm using an old machine with limited memory, and I want to compute
> the MD5 hash of a 4 GB file.
> Do I need to buffer the input as in C++? And how should I check for
> exceptions? Example code much appreciated.
> Thank you for reading.

You'd probably just use std.stdio.File's byChunk with std.md5.MD5_CTX. 
Something like

MD5_CTX md5;
auto file = File(filename);

foreach(ubyte[] buffer; file.byChunk(4096))

ubyte[16] result;

I've never used std.md5 though, so I'm just going by the docs on how to use 

- Jonathan M Davis

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