[PD-dev] parsing pd patch files (in php)

[Andre Schmidt]

hi,

im now trying two days to find a way how to parse pd patch files, today
i found about "recursive functions" and think that would be the
solution...

but as im not a good coder i cant really modify the "recursive directory
listing" code examples that i found through google....

http://www.zend.com/zend/art/recursion.php
$delim = strstr(PHP_OS, "WIN") ? "\\" : "/";
function retrieveTree($path)  {
  global $delim;
  if ($dir=@opendir($path)) {
    while (($element=readdir($dir))!== false) {
      if(is_dir($path.$delim.$element) && $element!= "." && $element!=
"..") {
        $array[$element] = retrieveTree($path.$delim.$element);
      }elseif ($element!= "." && $element!= "..") {
        $array[] = $element;
      }
    }
    closedir($dir);
  }
  return (isset($array) ? $array : false);
} 

but i think i found out how the array should look like:

this is the pd patch file: (line numbers are used for better
visualisation)
01#N canvas 667 88 332 225 10;
02#X text 21 13 cid0;
03#N canvas 408 254 450 300 cid1 0;
04#N canvas 0 0 450 300 cid1 0;
05#X text 9 6 cid0;
06#X restore 18 30 pd cid1;
07#X text 17 8 cid0;
08#X restore 22 31 pd cid1;
09#N canvas 473 157 450 300 cid2 0;
10#X text 16 16 cid0;
11#X restore 116 31 pd cid2;
12#N canvas 0 0 450 300 cid3 0;
13#X text 14 11 cid0;
14#X restore 203 30 pd cid3;

and this would be the array:
Array(
    [canvas0] => Array(
        [0] => 01#N canvas 667 88 332 225 10;
        [1] => 02#X text 21 13 cid0;
        [canvas1] => Array(
            [0] => 03#N canvas 408 254 450 300 cid1 0;
            [canvas2] => Array(
                [0] => 04#N canvas 0 0 450 300 cid1 0;
                [1] => 05#X text 9 6 cid0;
            )
            [1] => 06#X restore 18 30 pd cid1;
            [2] => 07#X text 17 8 cid0;
        )
        [2] => 08#X restore 22 31 pd cid1;
        [canvas3] => Array(
            [0] => 09#N canvas 473 157 450 300 cid2 0;
            [1] => 10#X text 16 16 cid0;
        )
        [3] => 11#X restore 116 31 pd cid2;
        [canvas4] => Array(
            [0] => 12#N canvas 0 0 450 300 cid3 0;
            [1] => 13#X text 14 11 cid0;
        )
        [4] => 14#X restore 203 30 pd cid3;
    )
)

well, im not sure if that array is correct. i did it manually :)
and i havent even tested if i can then use that array the way i like,
but as im stuck on this parsing problem i desided not to test further
until i get this to work....

and maybe my array "design" is not so good anyway...

so, i wanted to ask you what would be the best way to parse pd files ?

im pretty sure i can do all other things (object drawing, connections)
alone, just this parsing thing gives me headache...

cheers
andre

ps. why i do this ? i wanted to display pd patches using "canvas" in
firefox 1.5...