RE: gawk always prints 0 for a hexadecimal number printed using printf %d

[Mahendra Ladhe]

That's great.

Thanks Sharuzzaman.

Now I can run my script on non-Ubuntu machines as well.

 

Thanks again,

Mahendra

________________________________

From: Sharuzzaman Ahmat Raslan [mailto:address@hidden 
Sent: Friday, November 07, 2008 11:49 AM
To: Mahendra Ladhe
Cc: address@hidden
Subject: Re: gawk always prints 0 for a hexadecimal number printed using
printf %d

 

Hi Mahendra,

I found some info regarding hex manipulation here:

http://osr507doc.sco.com/cgi-bin/info2html?(gawk.info.gz)Nondecimal%2520
Data&lang=en

The possible solution is to use the option --non-decimal-data

Example:

bash-3.00$ gawk --version
GNU Awk 3.1.3
Copyright (C) 1989, 1991-2003 Free Software Foundation.

bash-3.00$ cat file.txt
0xf

bash-3.00$ gawk --non-decimal-data '{ printf "%d\n",$1 }' file.txt
15




On Thu, Nov 6, 2008 at 5:50 PM, Mahendra Ladhe
<address@hidden> wrote:

Hi,

  when a field on a line which is a hexadecimal number(preceded by 0x)
is printed

using printf with %d format specifier, gawk always prints 0 instead of
the value of the

field in the decimal format.



 Kindly see below the interactions at two different Linux machines.



On Fedora-7 Linux:

==============

address@hidden:~] gawk --version

GNU Awk 3.1.6

Copyright (C) 1989, 1991-2007 Free Software Foundation.

[snip]



address@hidden:~] cat /proc/version

Linux version 2.6.21-1.3194.fc7
(address@hidden) (gcc version 4.1.2
20070502 (Red Hat 4.1.2-12)) #1 SMP Wed May 23 22:35:01 EDT 2007

address@hidden:~] cat file.txt

0xf

address@hidden:~] gawk '{printf("%d\n", $1)}' file.txt

0

address@hidden:~] gawk '{printf("%d\n", 0xf)}' file.txt

15



As seen above, if some field is specified($1, $2 etc), it prints 0
always, but if a hard coded value like 0xf is

used, the correct value is printed in decimal.





On Ubuntu Linux:

============

>From 'man awk' command



AUTHOR

      Mike Brennan (address@hidden).



Version 1.2                       Dec 22 1994
MAWK(1)



address@hidden:~] cat /proc/version

Linux version 2.6.24-19-generic (address@hidden) (gcc version 4.2.3
(Ubuntu 4.2.3-2ubuntu7)) #1 SMP Wed Aug 20 22:56:21 UTC 2008



address@hidden:~] cat file.txt

0xf

address@hidden:~] awk '{printf("%d\n", $1)}' file.txt

15





So on a Ubuntu Linux with a very old version of (m)wk it's working
correctly.





Thanks,

Mahendra Ladhe









-- 
Sharuzzaman Ahmat Raslan