changing case in sed

phoenix7 · 08-28-2005, 04:55 AM

Hi
I have some sources with this member fileds style

Code:

m[A-Z].*

I want to convert them to

Code:

[a-z].*

for example if a field named "mTime" I want to change it to "time".
how can I do this with sed utility?

-- Mohammad

Optimistic · 08-28-2005, 07:28 AM

You could try the y switch.

Something like:

Code:

sed y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/

phoenix7 · 08-28-2005, 07:50 AM

how can I do this completely?
"m[A-Z].*" ---> "[a-z].*"

Optimistic · 08-28-2005, 08:17 AM

Instead of using sed why not use rename?

This will make all the filename lowercase:

Code:

 rename 'y/A-Z/a-z/' *

To get rid of the m, you could try (not so sure about this one):

Code:

rename 's/^m*/*/' *

phoenix7 · 08-28-2005, 09:18 AM

Oh no I want to change variables names in c++ sources and header not change file names?!!

eddiebaby1023 · 08-28-2005, 02:49 PM

Quote:

Originally posted by Optimistic
You could try the y switch.

Something like:

Code:

sed y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/

Code:

sed 's/.*/\L&/'

is less to type! Vary the first pattern to match specifics rather than the whole line. \U to uppercase everything. Lowercase L or U will set the case of the first character matched.

phoenix7 · 08-30-2005, 05:52 AM

I think I found my answer

Code:

sed 's/\<m\([A-Z]\)/\l\1/'

but I don't know why this does wrong.
When I run it on this file:

Code:

    float mFieldLength;
    float mFieldWidth;
    float mFieldHeight;
    float mGoalWidth;
    float mGoalDepth;
    float mGoalHeight;
    float mBorderSize;

    float mAgentMass;
    float mAgentRadius;
    float mAgentMaxSpeed;

I got this as result:

Code:

 
    float fieldLength;
    float fieldWidth;
    float fieldHeight;
    float goalWidth;
    float goalDepth;
    float goalHeight;
    float borderSize;

    float agentMass;
    float agentRadius;
    float agentMaxSpeed;

It is right, but when I try to change this file

Code:

    while (msgRead < msgLen)
    {
        if (! SelectInput())
        {
            return false;
        }

        msgRead += read(mReadFd, offset, sizeof(mBuffer) - msgRead);
        offset += msgRead;
    }

I got this as result

Code:

    while (sgRead < msgLen)
    {
        if (! SelectInput())
        {
            return false;
        }

         sgRead += read(mReadFd, offset, sizeof(mBuffer) - msgRead);
        offset += sgRead;
    }

mistakes are made in red colored variables.
how can I fix it?

homey · 08-30-2005, 06:56 AM

Why you don't use the example eddiebaby1023 gave?

Code:

This will change everything to lower case
cat file.txt | sed -e 's/.*/\L&/g'

And this will change all words that start with m
cat file.txt | sed -e 's/m.*/\L&/g'

phoenix7 · 08-30-2005, 07:18 AM

I don't want to change case of all chars after m
I want to change

Code:

mFirstSecondThird

to

Code:

firstSecondThird