[SOLVED] Question in Vi editor

Ajit Gunge · 02-01-2010, 09:10 AM

Hi,
I have been usign for quite a while now.I have a requirement I want to align few lines of code so is there any easy command for this one.Let me expalin you my problem in detail.

Suppose if I have a piece of code in C like this one

int funct()
{
some code
if(x==y)
{
........
........
}
}

this is a properly aligned code now due to some reason I have to change some condition and the alignment is to be changed accoordingly suppose above the if case is removed than is there any way to align the ..... with that some code.Please help?

Thanks,
Ajit

worm5252 · 02-01-2010, 09:45 AM

Well everything appears aligned to me because you did not put it in [ code ][ /code ] tags. Alignment is easy to modify using nano as it supports tabs. I would say use nano instead of vi to adjust.

jschiwal · 02-01-2010, 10:06 AM

I can never remember some of the options when I need them and use the substitute command.
For example:
:.,+8s/^/\t/
will insert a tab from the current position plus 8 lines at the beginning of the line.
You could instead:
:12,17s/^ //
to remove 4 spaces in lines 12-17.

You can use
:nu or :.,+15nu
to print line numbers before the lines. This can allow you to learn which line number range to use.

You can also use patterns.
/open(/,/close(/s/^/\t/
Will insert a tab in the lines from one matching "open(" and one matching "close("

This will remove a tab between the lines matching "funt(" and "b=c" inclusively.
/funt(/,/b=c/s/\t//

If you have a blank line between blocks of code, you can use:
.,/^$/
to match from the current line to the blank line.

---
Also look at the "indent" program. It will re-indent C code.

carbonfiber · 02-01-2010, 10:22 AM

Perhaps the == command will help. Example usage:

Phase 1: write bad program

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
        if (-1 < argc)
                printf("Hello, world!\n")
}

Phase 2: D'oh!
Phase 3: delete if

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
                printf("Hello, world!\n")
}

Phase 4: (whilst in command mode) for example: press 6 (we have 6 lines), then press =, then press =, result:

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
        printf("Hello, world!\n")
}

carbonfiber · 02-01-2010, 10:22 AM

Ajit Gunge · 02-01-2010, 12:09 PM

Quote:

Originally Posted by carbonfiber

Perhaps the == command will help. Example usage:

Phase 1: write bad program

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
        if (-1 < argc)
                printf("Hello, world!\n")
}

Phase 2: D'oh!
Phase 3: delete if

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
                printf("Hello, world!\n")
}

Phase 4: (whilst in command mode) for example: press 6 (we have 6 lines), then press =, then press =, result:

Code:

#include <stdio.h>

int main(int argc, char *argv[])
{
        printf("Hello, world!\n")
}

Carbonfiber do I have to run :== in the vi editor and it will to the alignment is it what you are saying.

carbonfiber · 02-01-2010, 12:21 PM

:-/ No. For example, move to the line you wish to indent. Make sure you are in command mode (not insert mode). Press =, then.. press = again. No :.