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Full Discussion: Removing Multiple Line comments
Top Forums Shell Programming and Scripting Removing Multiple Line comments Post 302498538 by Chubler_XL on Monday 21st of February 2011 06:29:07 PM
Old 02-21-2011
You didn't say what you wanted to do with nested comments, what should the output of the following be?

Code:
/* This is the outer comment 
    /* And the inner comment */  
  Some more of the outer */Done!

This awk script allows nested comments (output is "Done!"), but no support for escaped comments (eg quoted text or backslash support):

It calls function p with each char and a lookahead char (n)
Code:
awk 'function p(c,n) {
  if(j) return j=0;
  if(c=="/" && n=="*") {m++; return j=1}
  if(m && c=="*" && n=="/") {m--; return j=1}
  if(!m) printf c; }
{ for(i=1;i<=length($0);i++) p(substr($0,i,1), substr($0,i+1,1)); if(!m) printf "\n"}' infile

Last edited by Chubler_XL; 02-22-2011 at 01:12 AM..
This User Gave Thanks to Chubler_XL For This Post:
Jackuar
 

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LEARN ABOUT DEBIAN

oggz-comment

oggz-comment(1) 					      General Commands Manual						   oggz-comment(1)

NAME

       oggz-comment -- List or edit comments in an Ogg file.

SYNOPSIS

       oggz-comment [-l  | --list ]

       oggz-comment  [-o  filename   | --output filename ]  [-d  | --delete ]  [-a  | --all ]  [-s serialno  | --serialno serialno ]  [-c content-
       type  | --content-type content-type ] filename

       oggz-comment [-h  | --help ]  [-v  | --version ]

Description
       oggz-comment lists or edits the comments of an Ogg file.

Options
       oggz-comment accepts the following options:

   Listing options
       -l, --list
		 List the comments in the given file.

   Editing options
       -o filename, --output filename
		 Write output to the specified filename.

       -d, --delete
		 Delete comments before editing.

       -a, --all Edit comments for all logical bitstreams.

       -c content-type, --content-type content-type
		 Edit comments of the logical bitstreams with specified content-type.  Run oggz-known-codecs(1) for a full list of codecs known by
		 the installed version of oggz.

       -s serialno, --serialno serialno
		 Edit comments of the logical bitstream with specified serialno.

   Miscellaneous options
       -h, --help
		 Display usage information and exit.

       -v, --version
		 Output version information and exit.

EXAMPLES

       List all comments in file.ogg:

	      oggz comment -l file.ogg

       List only the comments in the Theora bitstream in file.ogv:

	      oggz comment -l -c theora file.ogv

       Add the comment "GENRE=Rock" to the Vorbis bitstream of file.ogv, writing output to output.ogv:

	      oggz comment -c vorbis -o output.ogv file.ogg GENRE=Rock

AUTHOR

       Kangyuan Niu	   August  5, 2007;

COPYRIGHT

       Copyright (C) 2007 Annodex Association

SEE ALSO

       vorbiscomment(1), ogginfo(1), oggz-info(1), hogg(1)

																   oggz-comment(1)
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