[PD] re: state saving

Frank Barknecht fbar at footils.org
Fri Nov 28 22:05:07 CET 2003

Josh Steiner hat gesagt: // Josh Steiner wrote:

> incidentally i am also pretty deep in the process of building a modular 
> sequencer that saves the state of all the objects in a song using 
> [maphash] which suffers from the same "saves the textfile releatve to 
> the pd dir, not the patch dir" problem.  how can you share a little more 
> detail on how your solved this issue?  also, what advantages does the 
> [pool] object have over [maphash]?

I never used maphash, so I can't be to deep about that, but some of
the cool pool features are: 

 * shared storage pool possible: just give a name as first argument,
   and all pool's with the same name share all data and actions. With
   this the state-file location in the filesystem becomes rather
   irrelevant, because loading just one file with the full path is no
   PITA anymore.
 * saves and loads xml data, too.
 * Hierarchical data structure.

Pool hierarchies in XML look like this (indentation by me):

  <?xml version="1.0" encoding="ISO-8859-1"?>
  <!DOCTYPE pool SYSTEM "pool.dtd">
	<value key="1">60</value>
	<value key="2">51</value>
	<dir key="bla">
	  <value key="2">66</value>
	  <value key="1">44</value>
	<dir key="check">
	  <value key="2">69</value>
	  <value key="1">41</value>
	<dir key="bass">
	  <value key="2">8</value>
	  <value key="1">96</value>
	<dir key="1">
	  <value key="a_symbol">0</value>
	  <value key="b_symbol">89</value>
	  <dir key="subfolder">
	     <value key="subkey">with a list inside</value>

Maybe there's even more inside...

 Frank Barknecht                               _ ______footils.org__

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