Using sed/awk to port multiple line in clause to a line?

Question

I have a code clause in a multiple line and want port it to one line for example:

int j =7;
int k =17;
int p =17;
myFunc(j,
k,
p);
j++;

port it to

int j =7;
int k =17;
int p =17;
myFunc(j, k, p);
j++;

I have a expression that close to what that I need but result is

 sed -e '/my/,/;\a/{:a; N; s/\n/ /g; ta}' my file 

int j =7;
int k =17;
int p =17;
myFunc(j, k, p); j++;

any idea How to do that?

use clang format or any other auto format tool, nothing else :) — perreal, Aug 18 '15 at 10:23
You _could_ use `sed` or `awk`, but you'll get better results from a more targeted tool - I recommend GNU `indent`. — Toby Speight, Aug 18 '15 at 12:36
You cannot reliably manipulate the text of a programming language without a parser for that language. As @TobySpeight says get a beautifier like `indent`, or `cb` or `uncrustify`, or anything mentioned at http://stackoverflow.com/questions/841075/best-c-code-formatter-beautifier or just google `C beautifier`. — Ed Morton, Aug 18 '15 at 12:42
I haven't parser and I haven't permission to install it on my workstation I only want to do a small manipulation — herzl shemuelian, Aug 18 '15 at 12:58
regular expression tool can't not guarantee to deal with a context free grammar without producing any issues. it's better to use a specific tool — Jason Hu, Aug 18 '15 at 13:20

score 1 · Answer 1 · answered Aug 18 '15 at 13:18

If you want one statement per line and statements are delimited by ;, you can use this trick: remove all new lines and replace delimiters with delimiter+newline.

One solution using awk

 tr -d '\n' <code | awk -v RS=";" -v ORS=";\n" '1'

Obviously, this won't work if you have multi-line statements.

score 1 · Accepted Answer · answered Aug 18 '15 at 19:44

1

This might work for you (GNU sed):

sed '/^my/{:a;/;$/!{N;ba};s/\n/ /g}' file

answered Aug 18 '15 at 19:44

potong

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Using sed/awk to port multiple line in clause to a line?

2 Answers2