Shell Programming and Scripting

$
$ cat xverter
#! /usr/bin/bash

# convert from hex to ascii
sample=" 38 30 30 30"
sample=${sample// /\\x}
sample="$sample\\n"
printf "$sample"

#
# convert from base 16 to base 10

hex=76
((dec=0X$hex))
echo $dec

exit 0
$
$
$ ./xverter
8000
118
$

#!/usr/bin/env ruby 
File.open("file").each do|line|
    if line =~ /^(SW|Hardware)|Error|Test|Full/i
        toconv = line.scan(/\[(.*?)\]/)[0][0]
        if line =~ /SW|Hardware/
            toconv = toconv.split.map{|x|x.hex.chr}.join
        else
            toconv = toconv.split.map{|x|x.hex}.join
        end
        line.gsub!( /(.*\[)(.*)(\].*)/ , "\\1#{toconv}\\3" )
    end
    puts line
end

$ ruby myconvert.rb
------------
ip = 10.2.3.4
------------
Hardware= [8000]
Errors= [0161]
Full= [99]
SW Version= [1.8.1.109]
Test= [118]
------------
ip = 10.2.3.8
------------
Hardware= [4000]
Errors= [0161]
Full= [69]
SW Version= [1.8.1.109]
Test= [118]

BEGIN {
  FS="([[]|[]])"
}
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))
    v=(16*v)+x-1
  }
  return v
}

function hex2str(h) {
  printf("%c", hex2dec(h))
}
/^(--|ip)/ {print; next}

/^(Hardware|SW Version)=/ {
  printf("%s",$1 "[")
  n=split($2, vA,OFS)
  for(i=1;i<=n;i++)
     printf("%c%s", hex2str(vA[i]), (i==n)? "]"ORS:"")
  next
}
{
  printf("%s",$1 "[")
  n=split($2, vA,OFS)
  for(i=1;i<=n;i++)
     printf("%d%s", hex2dec(vA[i]), (i==n)? "]"ORS:"")
}