all the functions/methods i've come across so far deal with either streams or just file names (like std.file.read) and there doesn't seem to be a way to wrap a std.stdio.File in a stream (or is there?). i need a function that takes a std.stdio.File and returns a string or byte array.

On Tuesday, 16 September 2014 at 14:37:06 UTC, Jay wrote:
> all the functions/methods i've come across so far deal with either streams or just file names (like std.file.read) and there doesn't seem to be a way to wrap a std.stdio.File in a stream (or is there?). i need a function that takes a std.stdio.File and returns a string or byte array.

You could try `std.mmfile.MmFile`, it has a constructor that takes a `File`, but only on Linux:

http://dlang.org/phobos/std_mmfile.html
https://github.com/D-Programming-Language/phobos/blob/master/std/mmfile.d#L77-L79

V Tue, 16 Sep 2014 14:37:05 +0000
Jay via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com> napsáno:

> all the functions/methods i've come across so far deal with either streams or just file names (like std.file.read) and there doesn't seem to be a way to wrap a std.stdio.File in a stream (or is there?). i need a function that takes a std.stdio.File and returns a string or byte array.


You can use rawRead: http://dlang.org/phobos/std_stdio.html#.File.rawRead

On Tuesday, 16 September 2014 at 14:43:10 UTC, Marc Schütz wrote:
> You could try `std.mmfile.MmFile`, it has a constructor that takes a `File`, but only on Linux:
>
> http://dlang.org/phobos/std_mmfile.html
> https://github.com/D-Programming-Language/phobos/blob/master/std/mmfile.d#L77-L79

does it work with pipes/sockets? it seems to call fstat() to get the size of the contents. but anyway this is quite useful, thanks.

On Tuesday, 16 September 2014 at 14:49:08 UTC, Daniel Kozak via Digitalmars-d-learn wrote:
> You can use rawRead:
> http://dlang.org/phobos/std_stdio.html#.File.rawRead

for that i need to know the size of the contents. is there a function that does that for me? i'm looking for something like someFile.readAll(). and it shouldn't matter whether the File instance represents a regular file or a pipe/stream.

On Tuesday, 16 September 2014 at 15:03:05 UTC, Jay wrote:
> and it shouldn't matter whether the File instance represents a regular file or a pipe/stream.

i meant pipe/socket.

On Tuesday, 16 September 2014 at 14:59:45 UTC, Jay wrote:
> On Tuesday, 16 September 2014 at 14:43:10 UTC, Marc Schütz wrote:
>> You could try `std.mmfile.MmFile`, it has a constructor that takes a `File`, but only on Linux:
>>
>> http://dlang.org/phobos/std_mmfile.html
>> https://github.com/D-Programming-Language/phobos/blob/master/std/mmfile.d#L77-L79
>
> does it work with pipes/sockets? it seems to call fstat() to get the size of the contents. but anyway this is quite useful, thanks.

mmap(2) says it fails with EACCES when the fd isn't a regular file, so unfortunately it won't work.

On 09/16/2014 07:37 AM, Jay wrote:
> all the functions/methods i've come across so far deal with either
> streams or just file names (like std.file.read) and there doesn't seem
> to be a way to wrap a std.stdio.File in a stream (or is there?). i need
> a function that takes a std.stdio.File and returns a string or byte array.

std.file.read (and readText):

  http://dlang.org/phobos/std_file.html#.read

Ali

On Tuesday, 16 September 2014 at 16:54:17 UTC, Ali Çehreli wrote:
> On 09/16/2014 07:37 AM, Jay wrote:
>> all the functions/methods i've come across so far deal with either
>> streams or just file names (like std.file.read) and there doesn't seem
>> to be a way to wrap a std.stdio.File in a stream (or is there?). i need
>> a function that takes a std.stdio.File and returns a string or byte array.
>
> std.file.read (and readText):
>
>   http://dlang.org/phobos/std_file.html#.read
>
> Ali

wait, std.file.read doesn't accept a File instance. i've got a File instance generated by another function and now i need to read the entire contents of whatever it represents (a regular file/pipe/etc).

On Tue, 16 Sep 2014 14:37:05 +0000, Jay wrote:

> all the functions/methods i've come across so far deal with either streams or just file names (like std.file.read) and there doesn't seem to be a way to wrap a std.stdio.File in a stream (or is there?). i need a function that takes a std.stdio.File and returns a string or byte array.

The short answer is no.  I usually use something like this:

    // Lazy
    auto stream = stdin.byChunk(4096).joiner();

You can make it eager by tacking a `.array` on the end.  Functions used are from std.stdio, std.algorithm, std.array.