question about using sed command

feetyouwell · 12-12-2004, 07:33 PM

sed usage is like

Code:

 s/find/replace/

how can you put in there so sed only replace the WHOLE regular expression <find>

here is the problem i ran into

my sed file is like

Code:

s/_P0/.L0/
s/_P2/.L0/
s/_P0/.L1/
s/_P2/.L1/
s/_P1/.L2/
s/_P3/.L2/
s/_P4/.L3/
s/_P5/.L4/
s/_P5/.L5/
s/_P7/.L5/
s/_P6/.L6/
s/_P8/.L6/
s/_P9/.L7/
s/_P10/.L9/
s/_P10/.L10/
s/_P12/.L10/
s/_P11/.L11/
s/_P13/.L11/

therefore, the it sees _P12, it replaces _P1 with .L2 so i ended up having .L22 which is not what i want, how to fix those!!!

winsnomore · 12-12-2004, 07:48 PM

not sure if your last three enteries are correct...
you don't need to replace the numerals .. just do s/_P/.L/
and that will be fine for all entries ..

feetyouwell · 12-12-2004, 07:52 PM

the sed file i showed is a code generated file, it's a backpatching method used in creating a compiler, so i can't just delete the number out the _P, do you have any idea how to do s/<fix regexp>/replace here? thanks

feetyouwell · 12-12-2004, 08:17 PM

nevermind, i fixed, i added a '_' at the end of each find_string, so sed has to find a _ in order to complete searching, that worked like a charm

zulfilee · 12-13-2004, 08:47 AM

The easiest way could have been if you changed the order :-)

(i.e) P12 first and P1 next. Nevermind you had somethin else in mind.

Cheers
Z