release/src/router/www/remcoms2.sh

   1 #! /bin/sh
   2 # Strip C comments
   3 # by Stewart Ravenhall <stewart.ravenhall@ukonline.co.uk> -- 4 October 2000
   4 # Un-Korn-ized by Paolo Bonzini <bonzini@gnu.org> -- 24 November 2000
   5
   6 # Strip everything between /* and */ inclusive
   7
   8 # Copes with multi-line comments,
   9 # disassociated end comment symbols,
  10 # disassociated start comment symbols,
  11 # multiple comments per line
  12
  13 # Check given file exists
  14 program=`echo $0|sed -e 's:.*/::'`
  15 if [ "$#" != 3 ] && [ "$1" != "-" ] && [ ! -f "$1" ]; then
  16         print "$program: $1 does not exist"
  17         exit 2
  18 fi
  19
  20 # Create shell variables for ASCII 1 (control-a)
  21 # and ASCII 2 (control-b)
  22 a="`echo | tr '\012' '\001'`"
  23 b="`echo | tr '\012' '\002'`"
  24
  25 # The script is updated to strip both c and html comments
  26 # The original was taken here: http://sed.sourceforge.net/grabbag/scripts/remccoms2.sh.txt
  27 if [ $2 = "c" ] ; then
  28         p1="\/\*"
  29         p2="/\*"
  30         p3="\*/"
  31         p4="/*"
  32         p5="*/"
  33 else
  34         p1="<!--"
  35         p2="<!--"
  36         p3="-->"
  37         p4="<!--"
  38         p5="-->"
  39 fi
  40
  41 sed -ri '
  42         # If no start comment then go to end of script
  43         /'"$p1"'/!b
  44         :a
  45         s:'"$p2"':'"$a"':g
  46         s:'"$p3"':'"$b"':g
  47
  48         # If no end comment
  49         /'"$b"'/!{
  50                 :b
  51
  52                 # If not last line then read in next one
  53                 $!{
  54                         N
  55                         ba
  56                 }
  57
  58                 # If last line then remove from start
  59                 # comment to end of line
  60                 # then go to end of script
  61                 s:'"$a[^$b]"'*$::
  62                 bc
  63         }
  64
  65         # Remove comments
  66         '"s:$a[^$b]*$b"'::g
  67         /'"$a"'/ bb
  68
  69         :c
  70         s:'"$a"':'"$p4"':g
  71         s:'"$b"':'"$p5"':g
  72 ' $1
  73
  74 sed -i $1 -e "/^$/d"