puterboy,
Assuming this data is in a string, I would do something like:
my $skip = 0;
while ($skip < length($str)) {
my ($f1_len, $f2_len, $f3_len) = unpack("x${skip}aaa", $str);
$skip += 3;
my $field1 = unpack("x${skip}a$f1_len", $str);
$skip += $f1_len;
# etc
}
This is like using seek which is exactly what you were trying to avoid (iteratively calling pack) but if wrapped in the proper abstraction can be very clean.
Update: After reading BrowserUk's response and re-reading your post, I realize I incorrectly assumed you had multiple records in the string - each one with variable length fields. Please ignore me.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
