From: Farrel Lifson <farrel.lifson@...>
Date: 2006-12-07T19:04:28+09:00
Subject: Re: How to unpack unusual binary structure?

On 07/12/06, Leo -- <leopardus.vulgaris@gmail.com> wrote:
> Hello everyone
>
> I try to read binary file and it has section in following format:
> (I suspect this comes from .h file)
>
> ...
> then the bars array (one-byte justification) follows
>
> pragma pack(push,1)
>   //---- Standard representation of a quote in the base
>   struct RateInfo {
>     time_t            ctm;    // current time in seconds
>     double            open;
>     double            low;
>     double            high;
>     double            close;
>     double            vol;
>   };
> pragma pack(pop)
> ...
>
> I don't know what to do with pragma pack. I googled and found that this
> is some weird bit-level alignment for records. But I can't figure out,
> how do I read and .unpack such records.
>
> Can I just do .read(4 + 5 * 8) and get a record?
> How do I decode it if its packed with this pragma pack?
>
> Need help...
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

Have you looked at String#unpack ?

Farrel