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SED - output not desired

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# 1  
Old 12-07-2010
[SOLVED]SED - output not desired
Code:
echo '0x3f 0xfa ae 0xeA' | sed '/0x[0-9a-fA-F][0-9a-fA-F]/ y/abcdef/ABCDEF/'
output:
0x3F 0xFA AE 0xEA

echo '0x3f 0xfa ae 0xeA' | sed -r '/0x[0-9a-fA-F]{2}/ y/abcdefg/ABCDEFG/'
output:
0x3F 0xFA AE 0xEA

my expected output:
0x3F 0xFA ae 0xEA

What I want to achieve is change all hexadecimals to UPPER case(only those that start with 0x), ae shouldn't be changed since it does not starts with 0x.

Why my scripts don't work?
P.S. I only want to achieve this using SED.
Last edited by kevintse; 12-07-2010 at 09:26 PM..
# 2  
Old 12-07-2010
That will not work because the pattern will select lines, not words. If you have GNU sed, you can do this:
Code:
$ echo '0x3f 0xfa ae 0xeA' | sed 's/0x\([0-9a-fA-F][0-9a-fA-F]\)/0x\U\1/g'
0x3F 0xFA ae 0xEA

# 3  
Old 12-07-2010
Hi, Scrutinizer
what does "\U" mean in the script?

Quote:
Originally Posted by Scrutinizer
That will not work because the pattern will select lines, not words. If you have GNU sed, you can do this:
Code:
$ echo '0x3f 0xfa ae 0xeA' | sed 's/0x\([0-9a-fA-F][0-9a-fA-F]\)/0x\U\1/g'
0x3F 0xFA ae 0xEA

# 4  
Old 12-07-2010
Uppercase
# 5  
Old 12-07-2010
shouldn't we \E if they are some further occurrence of " 'ae'-like " within the same line ?

...ooops forget it ... apply to matching pattern only right
# 6  
Old 12-07-2010
Code:
echo '0x3f 0xfa ae 0xeA' |awk '{for (i=1;i<=NF;i++) if ($i~/^0x/) $i="0x" toupper(substr($i,3))}1'

# 7  
Old 12-08-2010
yet another sed solution..
Code:
echo '0x3f 0xfa ae 0xeA' |sed 's/0x\(..\)/0x\U\1/g'

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