Copying an std.stdio.File into another one
rikki cattermole
rikki at cattermole.co.nz
Mon May 21 11:53:31 UTC 2018
On 21/05/2018 11:50 PM, 0xEAB wrote:
> What's the correct way to copy a `File` into another one in D?
>
> If `LockingTextReader` wasn't undocumented, I'd have gone for that
> approach:
>
>> import std.algorithm.mutation : copy;
>> import std.stdio : File, LockingTextReader;
>>
>> void main()
>> {
>> auto a = File("a.txt", "r");
>> auto b = File("b.txt", "w");
>>
>> a.LockingTextReader.copy(b.lockingTextWriter);
>> }
>
>
> Side-note:
> Although the example code suggest otherwise, I'm not talking about
> copying actual files on disk. In such a case I'd just use
> `std.file.copy` ;)
> So, just imagine `a` were `stdout` of process pipe.
>
>
> Kind regards,
> Elias
I would probably start by reading it byChunk and writing it out as a
rawWrite or something along those lines. That way its using a nice
buffer (to limit memory usage).
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