I've had a module in the works for some time that I just haven't quite finished. It's currently called File::ComplexFormat and can be found at shoebox.net. I will release it some day, probably as Parse::BinGen (binary parser generator), mostly because Parse::Binary has been taken.

The module is technically usable, but there is no documentation, and the only real example is File::Format::Diablo::d2s, which parses the Diablo 2 .d2s character file format.

The approach I took was to read in a chunk of data, unpack it into bits (1's and 0's), then pop off the number of bits required, pack them, then translate as necessary. The solution is probably slow, but it was clearest in terms of design. I expect I'll move to a selectable XS backend whenever I actually get to hacking on it again.

The functions that accomplish that are read(), _read(), and write() in File::ComplexFormat.

In reply to Re: Binary File Manipulation across Byte boundaries by Somni
in thread Binary File Manipulation across Byte boundaries by tperdue

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.