<div>Hi John,</div><div><br></div><div>You are reading the entire file into an array of lines, then processing that array using a C-style for loop and interpolating the index var into the search string... and that is the LEAST crazy thing. :) It works, of course, because it turns out that there are infinitely many ways to do it.<br>
<br></div><div>For your immediate problem of the search-and-replace, I recommend reading the whole file into a single string, newlines and all, then using the /gc modifiers in the regex. Maybe put your colorChange stuff into an array that you loop through, checking the regex for the nth match:</div>
<div><br></div><div>@changes = ($change1, $change2, $change3);</div><div><br></div><div>foreach $change (@changes) {</div><div> $wholefile =~ s|08\s00\s00\s1C\s\d\d\s\d\d\s\d\d\s\d\d|08\s00\s00\s1C\s$change|gc;</div><div>
}</div><div><br></div><div>see <a href="http://perldoc.perl.org/perlre.html">http://perldoc.perl.org/perlre.html</a> and <a href="http://perldoc.perl.org/perlretut.html#Using-regular-expressions-in-Perl">http://perldoc.perl.org/perlretut.htm</a> for lots of details, but the upshot of the modifiers is: g makes it keep looking for matches; c tells it to remember where it last matched, and start from there on the next match. You don't have to care what n is, because you are matching your search string exactly as many times as you have changes to make.</div>
<div><br></div><div>...but this project sounds ripe for refactoring, if I may be so bold. Could it be that what you really need is a templating system?</div><div><br></div><div>Thanks for bringing some much-needed questions to this list!</div>
<div><br></div><div>Matt</div><div><br><div class="gmail_quote">On Tue, Feb 22, 2011 at 8:31 PM, John Ricker <span dir="ltr"><<a href="mailto:sephtin%2Bpm-talk@gmail.com">sephtin+pm-talk@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Received so much help with the last question (which seems to be functioning great, btw.. thanks all)... thought I'd try again. ;)<div>
<br></div><div>Have a script that was recently migrated to Perl from shell/bash, and am wondering if there's an easy way in Perl to do the following-</div>
<div><br></div><div>File(s) being modified are hex, and look something like:</div><div>---x---</div><div>...</div><div>08 00 00 00 FF FF FF FF FF FF FF FF 1B 00 00 00 02 01 10 00 28 01 00 00 09 00 00 00 FF FF FF FF FF FF FF FF 1C 00 00 00 14 00 14 00 0D 00 00 00 00 00 0D 00 18 00 00 00 11 00 00 00 FF FF FF FF 08 00 00 05 02 0E 00 00 18 00 00 00 0E 00 00 00 FF FF FF FF 08 00 00 1C 00 00 00 FF 18 00 00 00 09 00 00 00 FF FF FF FF 08 00 00 11 10 00 00 00 18 00 00 00 0F 00 00 00 FF FF FF FF 08 00 00 01 11 02 02 01 18 00 00 00 03 00 00 00 FF FF FF FF 08 00 00 01 05 00 08 01 18 00 00 00 10 00 00 00 FF FF FF FF 08 00 00 05 01 0F 00 00 18 00 00 00 05 00 00 00 FF FF FF FF 08 00 00 05 01 0F 00 00 18 00 00 </div>
<div>...</div><div>---x---</div><div>File(s) contain several occurrences of "08 00 00 1c ## ## ## ##" or more appropriately for this list: "08\s00\s00\s1C\s\d\d\s\d\d\s\d\d\s\d\d"</div><div><br></div>
<div>
Now on to the good stuff... I would like to replace the ## ## ## ## with my chosen colors, that are being provided by vars... Example:</div><div>colorChange1="FF 00 00 FF"</div><div>colorChange2="FF FF 00 FF"</div>
<div>colorChange3="FF 00 FF FF"</div><div>...</div><div><br></div><div>I'm wondering how it might be possible, to replace the FIRST occurrence (in the file, NOT in a line) of "08 00 00 1C ## ## ## ##" with "08 00 00 1C $colorChange1", the second with "08 00 00 1C $colorChange2", etc.</div>
<div><br></div><div>More info:</div><div>--Script modifies files to theme them, in this case, I'm taking a BINARY (compiled XML) file, converting it to HEX via xxd, and then changing the text color for a theme via substitution.</div>
<div>--I originally thought it could be done similar to what sed does... with s|(08\s00\s00\s1C)\s\d\d\s\d\d\s\d\d\s\d\d|$1$colorChange1|1 (note last digit...), but testing has shown that this doesn't work as expected.</div>
<div>--Not really related, but in the binary, the colors are actually backwards, so color - FF AB CD EF becomes binary - EF CD AB FF, but that's an easy change.</div><div>--CURRENTLY in my script, I'm doing this via a sub, passing an array of the colors, the file, and the file location (directory), and pulling the file, making the changes, and saving it back out via loop... BUT, because I couldn't figure out how to just do the multiple replaces... I cheated and made template files that contain "08 00 00 1C 11 11 11 11" and "08 00 00 1C 22 22 22 22", so when I iterate through the loop, I just change like so:</div>
<div>for ( $i = 1 ; $i <= $COUNT ; $i++ ) {</div><div>...</div><div> $line =~ s|08\s00\s00\s1c\s$i$i\s$i$i\s$i$i\s$i$i\s|08 00 00 1c $array_ref[$i]|;</div><div>...</div><div>}</div><div><br></div><div>Code works, but I'd much rather be able to pull native files straight out of the .zip, and change them that way... :P</div>
<div><br></div><div>Anyway, again, if there are specifics I missed, happy to provide them. </div><div>I keep thinking there should be an easy way to do this... but my google-fu is failing me.. </div><div><br></div><div>
Thanks again for the help with the previous problem, and in advance for any assistance on this one. :)</div>
<div>At the very least, I guess I can provide some chatter to the group.</div><div><br></div><div>-John (sephtin @gmail)</div>
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<br></blockquote></div><br></div>