Reading bytes and converting to int

[Jonathan M Davis]

On Saturday, August 25, 2012 22:18:50 joao wrote:
> It's not hard, sorry, it's because I'm a begginner.
> So, all I wanted to do was to open a file and read the first 4
> bytes and then return the int value. The last part I managed to
> do.
> But the first I'm trying.
> 
> In Python it is something like this:
> f = open('filename')
> s = f.read(4)
> ...
> In D I don't know yet. I'm trying to do:
> File f = File('filename')
> Then I want to read just 4 bytes. I still don't know what method
> is :P

I believe that this will work;

import std.stdio;

auto file = File("filename");
auto buffer = ubyte[](4);
buffer = file.rawRead(buffer);

rawRead will read in the type given, and it will read up to the number of 
elements given (less if the file is shorter). If the elements are ubyte, then 
the length of the array before passing it in will be the number of bytes to 
read, and the length of the result is the number of bytes read.

- Jonathan M Davis