From: "Olivier Andrieu" <oandrieu@nerim.net>
To: "Dário Abdulrehman" <drehman31@gmail.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] reading/writing binary data
Date: Tue, 21 Nov 2006 14:15:14 +0100 (CET) [thread overview]
Message-ID: <32511.213.30.139.86.1164114914.squirrel@webmail.nerim.net> (raw)
In-Reply-To: <6aeedf580611210334p41d2ba00jcceb00da3af0e3d2@mail.gmail.com>
> I am writing a program that encodes data in 32 bit ints. Ideally I would
> like to have 32 bit unsigned ints, but OCaml only has 31 bit signed ints.
It also has 32 bits signed ints (and 64 bits).
> I have a large binary file with the data that I will mmap with the
> Bigarray.Array1.map_file function.
>
> When I test the following code I am puzzled by the fact that Ocaml doesn't
> give me back the int in the same format as I wrote it.
>
> Why doesn't OCaml read back data in the same format?
because `output_binary_int' uses a big-endian encoding (cf. the reference
manual) whereas Bigarray.map_file uses the native endianess (probably
little-endian in your case).
Don't use different methods to write your data and read it back !
--
Olivier
next prev parent reply other threads:[~2006-11-21 13:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-21 11:34 Dário Abdulrehman
2006-11-21 13:15 ` Olivier Andrieu [this message]
2006-11-21 13:29 ` [Caml-list] " Dário Abdulrehman
2006-11-21 13:56 ` Dmitry Bely
2006-11-21 14:10 ` Jon Harrop
2006-11-21 19:57 ` Florian Hars
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=32511.213.30.139.86.1164114914.squirrel@webmail.nerim.net \
--to=oandrieu@nerim.net \
--cc=caml-list@inria.fr \
--cc=drehman31@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).