Need help in script; [ script to control a sentence & its words ]

frozensmilz · #1 (**permalink**) 01-22-2009

Hello friends,

I am looking for any sed/awk/python script that can identify the position of a character or word in a file. Well, I prefer sed. <space> is a tab space since I actually dont know how to make the forum editor display a space as such.

Sample text
-----------
<space><space><space><space>BAA BAA
<space><space><space>ABC 222 555
<space><space><space><space>XYZ 123
<space><space><space><space>BAA BAA

I would like to manipulate the above two sentences as following.

Result 1 [ backspace 1 (value taken from a variable) ]
--------------------------------------------------
<space><space><space><space>BAA BAA
<space><space><space>ABC 222 555
<space><space><space>XYZ 123
<space><space><space><space>BAA BAA

Result 2 [ space 1 (value taken from variable) ]
---------------------------------------------
<space><space><space><space>BAA BAA
<space><space><space>ABC 222 555
<space><space><space><space><space>XYZ 123
<space><space><space><space>BAA BAA

Result 3 [ copy XYZ from line 2 to line 1 beginning ]
------------------------------------------------
<space><space><space><space>BAA BAA
<space><space><space>ABC 222 555 XYZ
<space><space><space><space>123
<space><space><space><space>BAA BAA

Result 4 [ copy 555 from line 1 to line 2 beginning ]
------------------------------------------------
<space><space><space><space>BAA BAA
<space><space><space>ABC 222
<space><space><space>555 XYZ 123
<space><space><space><space>BAA BAA

Kindly help me or give me a start to achieve this script. Thanks in advance.

manas_ranjan · #2 (**permalink**) 01-22-2009

couldn't able to understand your variable and space riddle...

cfajohnson · #3 (**permalink**) 01-22-2009

Quote:

Originally Posted by frozensmilz

I am looking for any sed/awk/python script that can identify the position of a character or word in a file.

That's easy:

Code:

FILE=${1?You must have a filename}
STR=${2?You need string to index}

_index() #@ Store position of $2 in $1 in $_INDEX
{
    case $1 in
        "")  _INDEX=0; return 1 ;;
        *"$2"*) ## extract up to beginning of the matching portion
              idx=${1%%"$2"*}
              ## the starting position is one more than the length
              _INDEX=$(( ${#idx} + 1 )) ;;
        *) _INDEX=0; return 1 ;;
    esac
}

file=$( cat "$FILE" )

_index "$file" "$STR"

printf 'The position of "%s" is %d\n' "$STR" "$_INDEX"

frozensmilz · #4 (**permalink**) 01-22-2009

Hello friends,

Thanks very much for the support. Sorry for the confusion.

Explaining the situation with a sample case

Input is a sample text containing a if block as follows

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 

1             statements .......                             
2                          if ( condition 
3                          ) 
4                         { 
5                                           Statement 1;
6                              Statement 2;
7                                           Statement 3;
8            }
9  statements ..............
10

            10          20          30           40
1           *            *            *            *           50 Columns- just assume

I would like to do the following with the help of a script

1. Bring the Closing bracket of if statement from LINE 3 to to end of LINE 2
as follows

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 

1             statements .......                             
2                             if ( condition )
3                                 
            10          20          30           40
1           *            *            *            *           50 Columns- just assume

2. In LINE 7 move the closing brace of if block from column 10 to say column 20 as follows (updated line numbers since the last operation removed a line) such that the "if" & "{" starts from same column.

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 

5                              Statement 2;
6                                           Statement 3;
7                          }
8  statements ..............
            10          20          30           40
1           *            *            *            *           50 Columns- just assume

3. In LINE 3 move the opening brace of if block from say column 20 to end of LINE 2 as follows. (Note that the statements below should move upwards as the LINE 3 & 4 got removed.)

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 

1             statements .......                             
2                          if ( condition ) {
3                                          Statement 1;

            10          20          30           40
1           *            *            *            *           50 Columns- just assume

4. From LINE 3 to LINE 7. The Statement 1 & Statement 3 should align according to position (say, column 23) of Statement 2 as follows. And Add a new line after Statement 3 & before Statement 1.

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 
3
4                              Statement 1;
5                              Statement 2;
6                              Statement 3;
7
            10          20          30           40
1           *            *            *            *           50 Columns- just assume

After all the above operation the final if block should look like this (properly aligned & spaced)

HTML Code:

            10          20          30           40
1           *            *            *            *           50 Columns- just assume 

1             statements .......                             
2                          if ( condition ) { 
3
4                              Statement 1;
5                              Statement 2;
6                              Statement 3;
7
8                          }
9  statements ..............
10

            10          20          30           40
1           *            *            *            *           50 Columns- just assume

I need a script that is just not meant for a if loop but for any situation which is why i used samples containing AAA, BAA.

<space> meant tab space, i am a beginner & just got comfortable with sed & awk...well, i am ready to have keys to the new doors..so please do provide any new or better methods to solve the problem.

Summary
If possible it will be nice if i can get a script, that can do the following. so that i can have a start.

1. finds the position of the first word in a line.
>for example the script should be able to tell me the position of A in A11 BBB CC1
2. finds the position of the last word in a line (calculating 1st character position of the first word of a line)
> for example the script should be able to tell me the position of '2' in B11 DDD ZZ2 (calculating last character position of the last word of a line)
3. A script that can move any word say B11 to a position after CC1 (line to line movement)
4. A script that can move any word say RRR such that the A11 & RRR should start from same column (column to column movement)

HTML Code:

Before
                     A11 BBB CC1
                           B11 DDD ZZ2
              RRR FFF

After
                     A11 BBB CC1 B11
                           DDD ZZ2
                     RRR FFF

Awaiting for support. Thanks

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