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Help: convert // to /* */ in C code?

Help: convert // to /* */ in C code?# Unix - 噫吁兮，危乎高哉

R*r2005-06-13 07:06

1 楼

I have a c source code can be compiled using cc in Unix
where comments can be used by either /*---- */ or //
How to compile it with gpcc where only /*---*/ can be used to
comments lines?
Is there easy way to convert // to /* */ in C code?
Apparent I cann't just use replace.
(Don't tell me to re-write it, I cannot afford to
re-write them all)

m*c2005-06-13 07:06

2 楼

Try to see if "sed" can help:
sed -i'.bak' -e 's/^$[^\/]*$\/\{2,\}$.*$$/\1\/*\2*\//g'filename.c
Above command will repalce "//..." to "/*...*/" in filename.c (and make a
backup of "filename.c" named "filename.c.bak").
To replace all files, use "find" and "sed" together:
find -iname '*.c' -print0 | xargs -0 sed -i'.bak' -e
's/^$[^\/]*$\/\{2,\}$.*$$/\1\/*\2*\//g'

【在 R****r 的大作中提到】

: I have a c source code can be compiled using cc in Unix
: where comments can be used by either /*---- */ or //
: How to compile it with gpcc where only /*---*/ can be used to
: comments lines?
: Is there easy way to convert // to /* */ in C code?
: Apparent I cann't just use replace.
: (Don't tell me to re-write it, I cannot afford to
: re-write them all)

m*c2005-06-13 07:06

3 楼

One more thing, before executing above command(s), backup everything :-) If
you run above commands twice, it will make backup of backups (in other words,
the original files will be overwritten.)

【在 m**c 的大作中提到】

:
: Try to see if "sed" can help:
: sed -i'.bak' -e 's/^$[^\/]*$\/\{2,\}$.*$$/\1\/*\2*\//g'filename.c
: Above command will repalce "//..." to "/*...*/" in filename.c (and make a
: backup of "filename.c" named "filename.c.bak").
: To replace all files, use "find" and "sed" together:
: find -iname '*.c' -print0 | xargs -0 sed -i'.bak' -e
: 's/^$[^\/]*$\/\{2,\}$.*$$/\1\/*\2*\//g'

q*e2005-06-13 07:06

4 楼

if you only have one file, just open it with vi, then type command:
:%s/\/\/.*$/\/\* & \*\/g
then everything is fine. nOW YOU SAVE THE FILE WITH ANOTHER NAME.

【在 m**c 的大作中提到】

:
: One more thing, before executing above command(s), backup everything :-) If
: you run above commands twice, it will make backup of backups (in other words,
: the original files will be overwritten.)

X*r2005-06-13 07:06

5 楼

just to remind the original poster that there are a few cases cannot
be processed by this kind of simple match and replacement method, e.g.
"//"
/*
//
*/
that's why backup is important.

【在 q***e 的大作中提到】

: if you only have one file, just open it with vi, then type command:
: :%s/\/\/.*$/\/\* & \*\/g
: then everything is fine. nOW YOU SAVE THE FILE WITH ANOTHER NAME.