Hello All, I am a PERL newbie, and come from a hardware background. My question is with regards concatenating binary data in PERL. I am reading a 32-bit value (4 bytes) from a binary file. I would like to concatenate one bit in front of the value (new value will be 33 bits!) I have tried different variations of using pack, but either I don't think I understand pack command correctly, or B, PERL doesn't like my use of a 33 bit data. How should I fix this? Here is sample of what I am doing
open (PARSER_FILE, $inputfile)
or die "Couldn't open $inputfile for reading";
open (OUT_FILE, ">", $outputfile)
or die "Couldn't open $outputfile for writing";
read(PARSER_FILE, $buff, 4)
print OUT_FILE pack(b33, 1, $buff);
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||