How do you specify a 0xff in a PDL

This topic has 5 replies, 3 voices, and was last updated 16 years, 2 months ago by Kevan Riley.

Creator

Topic
October 21, 2008 at 12:11 am #50397
Kevan Riley
Participant
I am looking at data that starts with an (0x02) and ends in 6 0xFF’s

“7eff ffffffff ff” (the 7e uis a ‘~’). I would like to use the same structure as the MLP PDL but substituting the for and teh with something like <0xff><0xff><0xff><0xff><0xff><0xff>.

Something like this:

define phrase basic-msg;

;

field data = variable-array( not( <0xff> ) );

<0xff>; <0xff>;

<0xff>; <0xff>;

<0xff>; <0xff>;

end phrase;

But the 0xff syntax is not allowed, and there is no character name for a 0xFF.

Kevan Riley

AHS-IS
Creator

Topic

Viewing 4 reply threads

Author

Replies
- October 21, 2008 at 4:26 pm #65954
  Michael Hertel
  Participant
  Try xff or \ff but are you really sure that’s what you want to use?
  
  0xff is usually filler. (whitespace)
- October 22, 2008 at 12:49 pm #65955
  Kevan Riley
  Participant
  I am still stuck with this.
  
  I tried all combinations of single quotes, <>, slashes with and with and with out a leading x or 0x (ie. ff, xff, xff, , , , ‘ff’, ‘xff’, ‘xff’, ‘\ff’, etc).
  
  The issue is that I can’t figure out how to specify the phrase definition. It has different, none-tcl, rules and syntax.
  
  the message is X12 and begins like this (first 4 columns are the Hex values):
  
  02564030 30303031 4953412a 30302a20 .V@00001ISA*00*
  
  which is great, the leading x02 is an . But here is the end of the message:
  
  37327e49 45412a31 2a303139 39333136 72~IEA*1*0199316
  
  37327eff ffffffff ff 72~……
  
  All I have to work with here are the FF’s. The 7e is the “~” for the seg terminator. These are specified in the current source system as three <255>‘s. I have to emulate this in Cloverleaf (both reading and writing) which would be a piece of cake if I could just specify the ff’s in the PDL phrase definition. According to all of the example PDL’s I have see they all have a variable-array of the form variable-array( not()). which, again, would be great if I could just specify the hex xff here.
  
  Kevan Riley
  
  AHS-IS
- October 22, 2008 at 1:35 pm #65956
  Russ Ross
  Participant
  I would be like you trying everything I could think of that makes since and asking for help.
  
  Perhaps you can try the FF character striaght by generating it and copy/paste it straight into your PDL script and see if that works.
  
  I was able to generate the base 16 FF character ( which is 255 in base 10 and 377 in base 8 ) for copy/paste in an xterm on my AIX box as follows
  
  echo ‘377’
  
  which resulted in displaying the following character
  
  Russ Ross
  RussRoss318@gmail.com
- October 22, 2008 at 1:57 pm #65957
  Russ Ross
  Participant
  I looked at some of the other PDLs laying around to see if I could find one example of specifying a character outright and I ran across this:
  
  field data = variable-array( not( ‘}’ ) );
  
  using that example you might try this
  
  define phrase basic-msg;
  
  ;
  
  field data = variable-array( not( ‘
  
  Russ Ross
  RussRoss318@gmail.com
- October 22, 2008 at 2:26 pm #65958
  Kevan Riley
  Participant
  Russ, you da’ man! That worked. It did not even occur to me to try and produce the “none-printable” character and use that, and I really had my doubts it would actually work in the pdl. But it does! the message looks great coming coming in and going out. Thanks a bunch!
  
  Here is my code for the phrase definition:
  
  define phrase basic-msg;
  
  ;
  
  field data = variable-array( not(‘
Author

Replies

Viewing 4 reply threads

The forum ‘Cloverleaf’ is closed to new topics and replies.