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changing c comments to c++ style with sed

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# 1  
Old 06-21-2010
changing c comments to c++ style with sed
Hi everyone,

I've got a problem with converting C comments ( /* */ ) into C++ style ( // ) in some source file with sed. So far I've dealt with comments on one line, but I don't know how to convert when it is over multiple lines ...

So I already have something like this:

comments.sed
Code:
s/\/\*/\/\//g
s/\*\//&\n/g
/\/\/.*[^*\/\n]$/a\something

I actually pick first /* and substitute it for // and then after */ put newlines. After then I would remove the */ ones, but before that I've thought about putting // before every line in /* */ multiple comment, but I don't know how (so the 3rd line in the code is only some idea). Do you have any idea? I would be really glad.

Thanks for every reply.
# 2  
Old 06-21-2010
Why are you doing this? C style comments are acceptable in C++ , and in my view may be a better way of commenting multiple lines anyway
# 3  
Old 06-21-2010
Well I need them each on one line because I will be processing them later ...
# 4  
Old 06-21-2010
Quote:
Originally Posted by kolage
Well I need them each on one line because I will be processing them later ...
Why not process the comments blockwise, instead of this intermediate step to process them linewise ?

tyler_durden
# 5  
Old 06-22-2010
I don't know how to do that... I just want to change comment like this:

Code:
/* Some comments1
   some comments2
   some comments3 */

to this:

Code:
// Some comments1
// some comments2
// some comments3



---------- Post updated 06-22-10 at 10:56 AM ---------- Previous update was 06-21-10 at 10:26 PM ----------

please anyone ??? Smilie
# 6  
Old 06-22-2010
Code:
cat file.c

code code
code code

/* Some comments1
   some comments2
   some comments3 */
code code
code code
/* Some comments1
   some comments2
   some comments3 */

Code:
sed -e '/\/\*/,/\*\//s/^/\/\//g' -e '/\/\*/,/\*\//s/\/\*\|\*\///g' file.c

code code
code code

// Some comments1
//   some comments2
//   some comments3 
code code
code code
// Some comments1
//   some comments2
//   some comments3


but take care, this may damage your code, if you use \* or */ for other purposes
This User Gave Thanks to funksen For This Post:
kolage
# 7  
Old 06-22-2010
Bumping up posts or double posting is not permitted in these forums.
Please read the rules, which you agreed to when you registered, if you have not already done so.

Thank You.

Maybe you can try something like this:
Code:
awk '
/\/\*/{sub("\/\*","  ");f=1}
/\*\/$/{sub("\*\/","");print "//" $0;f=0;next}
f{print "//" $0;next}
1' file

This User Gave Thanks to Franklin52 For This Post:
kolage
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