How do I use std.zlib to write a struct of data to a binary file with compression?

[Justin Whear]

On Tue, 25 Sep 2012 03:25:37 +0200, TJB wrote:

>> Since you're already set up with the Stream interface, try creating a
>> MemoryStream instead of a BufferedFile.  Write to the stream just as
>> you are now, then use the .data() property (on MemoryStream's
>> superclass,
>> TArrayStream) to get an array of raw bytes.  You can feed this array
>> into the compress function in std.zlib to produce a new (hopefully
>> shorter)
>> array of bytes that contains the compressed data.  Simply write this
>> compressed data to a file with `fout.writeExact(compressed.ptr,
>> compressed.length)` and you're done.
>>
>> Since uncompress works better if you know the exact size of the
>> uncompressed data, you might also consider writing the uncompressed
>> size of the data to your output file before the compressed data.
>>
>> Justin
> 
> Ok, I think I get it.  Can you help me set up the first part,
> writing to the MemoryStream?
> 
> TJB

I wrote up a quick example program and pasted it here:  
  http://dpaste.dzfl.pl/f1699d07

Hope that helps you out.