Wise monks, I ask your help for my unpack/pack ignorance. I need to present data in the same format as a Windows registry file (.reg, ascii not unicode)
Using the perl debugger, the hex data read from the registry looks like this: 
 DB<2> x $value
0  "\cA\cB\cC\cD\cE\cF\cG\cH\cI\cJ\cK\cL\cM\cN\cO\cZ\cP\cQ\cR\cS\cT\cU
+\cV\cW\cX\cY\cZ\e\c\\c]\c^\c_ !\"#\$%&'()*+,-./0123456789:;<=>?\@ABCD
+EFGHIJKLMNOPQRSTUVWXYZ[\\]^_"

[download]
and after doing ( $value ) = unpack("H*", $value); it looks like this: 
  DB<3> x $value
0  '0102030405060708090a0b0c0d0e0f1a101112131415161718191a1b1c1d1e1f20
+2122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f4041424
+34445464748494a4b4c4d4e4f505152535455565758595a5b5c5d5e5f'

[download]

What I need is comma-separated two-digit numbers, like this: 

01,02,03,04,05,06,07,08,09,0a,0b,0c,0d,0e,0f,1a,10,11,12,13,14,15,16,1
+7,18,19,1a,1b,1c,1d,1e,1f,20,21,22,23,24,25,26,27,28,29,2a,2b,2c,2d,2
+e,2f,30,31,32,33,34,35,36,37,38,39,3a,3b,3c,3d,3e,3f,40,41,42,43,44,4
+5,46,47,48,49,4a,4b,4c,4d,4e,4f,50,51,52,53,54,55,56,57,58,59,5a,5b,5
+c,5d,5e,5f

[download]
And I also need to be able to go in the opposite direction, from the comma-delimited numbers to hex data. How is this done? I'd really appreciate a code fragment rather than pointers to docs, as my mind seems unable to grasp this particular issue at present! Grateful thanks in hope.

In reply to unpack and pack by anadem

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