sed......the stream editing....or awk maybe

estumator · #1 (**permalink**) 02-23-04, 12:24

encounter problem again -_-b
i want to insert some character into specific position in a line, for example
insert a char after the 4th char, or insert a char in front of the 2nd field.etc.........
how can these be done then......
thanks for ur attention.......

aigles · #2 (**permalink**) 02-23-04, 12:53

Code:

Line="Txt: for test"

#
# Insert string after the 4th char
#

echo "$Line" | \
sed 's/^\(.\{4\}\)/\1(sed after 4th char)/'

echo "$Line" | \
awk '{print substr($0,1,4) "(awk after 4th char)" substr($0,5)}'

#
# Insert string before field 2
#

echo "$Line" | \
awk '{$2 = "(awk before field2)" $2;print $0}'

and the result

Quote:

Txt:(sed after 4th char) for test
Txt:(awk after 4th char) for test
Txt: (awk before field2)for test

estumator · #3 (**permalink**) 02-23-04, 13:25

thanks

julytli01 · #4 (**permalink**) 02-24-04, 15:13

I have a bunch of codes (like 80), every code has several subroutines. The task I was posed is to add C preprocessing to each subroutine (add #ifdef before each subroutine). I think this can be done using awk script. Could anybody help me on this? Please send email to julytli01@yahoo.com, thanks a lot!

Quote:

Originally posted by aigles

Code:

Line="Txt: for test"

#
# Insert string after the 4th char
#

echo "$Line" | \
sed 's/^\(.\{4\}\)/\1(sed after 4th char)/'

echo "$Line" | \
awk '{print substr($0,1,4) "(awk after 4th char)" substr($0,5)}'

#
# Insert string before field 2
#

echo "$Line" | \
awk '{$2 = "(awk before field2)" $2;print $0}'

and the result

aigles · #5 (**permalink**) 02-24-04, 15:19

Do you want to add and '#ifdef' statement only ?
You do you identify a subroutine ?

Give us an example of input code and requested result.

Internet Services

Web Development

Digital Marketing

Consumer Tech