From: Tom Ridge <tom.j.ridge+caml@googlemail.com>
To: caml-list <caml-list@inria.fr>
Subject: [Caml-list] String, Array, Bigarray.char
Date: Thu, 9 May 2013 14:32:20 +0100 [thread overview]
Message-ID: <CABooLwO=eYqxFQNJHUKFV_u-11R9b0U=BjH0OaGf--Uai457zQ@mail.gmail.com> (raw)
Dear caml-list,
Quick question: I am working a lot with arrays of byte, which at
various points I want to view as strings, and at various points I want
to view as arrays. The exact types involved should be discernible from
the code below.
I have some conversion functions e.g.:
type myfusebuffer = (char, Bigarray.int8_unsigned_elt,
Bigarray.c_layout) Bigarray.Array1.t
module A = Bigarray.Array1
(* convenience only; don't use in production code *)
let array_of_string bs = (
let arr = (Array.init (String.length bs) (String.get bs)) in
let contents = A.of_array Bigarray.char Bigarray.c_layout arr in
contents)
let (_:string -> myfusebuffer) = array_of_string
This presumably takes O(n) time (where n is the length of the string
bs). My question is: is there functionality to move values between
these types at cost O(1)? Basically, I'm hoping that String is
implemented as A.of_array Bigarray.char Bigarray.c_layout or
similar...
Thanks
next reply other threads:[~2013-05-09 13:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-09 13:32 Tom Ridge [this message]
2013-05-09 13:44 ` Anil Madhavapeddy
2013-05-09 14:07 ` Tom Ridge
2013-05-09 14:14 ` Tom Ridge
2013-05-09 14:21 ` Anil Madhavapeddy
2013-05-09 14:30 ` Tom Ridge
2013-05-09 16:29 ` ygrek
2013-05-09 14:29 ` Markus Mottl
2013-05-09 14:25 ` Markus Mottl
2013-05-10 23:42 ` Goswin von Brederlow
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