convert hex to ascii

[p0n3g]

Greetings,

I am looking for direction.

I have some xml files that contain a couple fields data that are in HEX format.

I was hoping that AWK would allow me to convert the HEX fields to ascii.

The end product would hopefully be the a new xml file with only the hex having been converted to ascii and nothing else modified.

Am I in the right place?

TIA

 

[Annihilannic]

If GNU awk is available on your system you can use strtonum to make the hex strings numeric, and then printf "%c",... to convert them into characters.

Annihilannic.

 

[Annihilannic]

I meant to include this example:

[tt]$ echo 0x41 | gawk '{printf "%c\n",strtonum($0)}'
A
$[/tt]

Annihilannic.

 

[PHV]

You may use a function like this:

function hex2dec(h      ,i,x,v){
  h=tolower(h);sub(/^0x/,"",h)
  for(i=1;i<=length(h);++i){
    x=index("0123456789abcdef",substr(h,i,1))
    if(!x)return "NaN"
    v=(16*v)+x-1
  }
  return v
}

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[p0n3g]

PHV

What is this script?
How would I use it and what does it do?

 

[Annihilannic]

It is an awk function. Include it at the beginning of your awk script, and call it using hex2dec(value), e.g.

[tt]hexval="0x34"
dec=hex2dec(hexval)[/tt]

Annihilannic.