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Full Discussion: NAWK conversion of hexadecimal input to decimal output via printf, I am close I can feel it
Top Forums Shell Programming and Scripting NAWK conversion of hexadecimal input to decimal output via printf, I am close I can feel it Post 302618185 by PCGameGuy on Tuesday 3rd of April 2012 05:31:55 PM
Old 04-03-2012
NAWK conversion of hexadecimal input to decimal output via printf, I am close I can feel it
I have searched and the answers I have found thus far have led me to this point, so I feel I am just about there.

I am trying to convert a column of hexadecimal to decimal values so that I can filter out via grep just the data I want. I was able to pull my original 3 character hex value and append 0x to the front but the printf statement seems not to work to convert it to decimal. I dumped my output to a file and have been trying to get it to convert so I can proceed on.

Here are the last lines snipped from my file, as it it large:


Code:
0x0C0,###0,33,6291
0x011,###1,59,0
0x009,###0,59,362147
0x011,###2,59,260
0x00E,###2,59,1051
0x008,###1,33,0
0x034,###2,59,0
0x001,###3,59,208
0x00E,###2,33,52
0x034,###2,33,0
0x00F,###1,59,0
0x009,###0,33,33022

From the shell prompt I tried:

Code:
printf  "%d\n" 0x03E

and get the proper output:

62

If I type:

Code:
cat <file>|nawk -F, '{printf "%d\n" , $1}'

I get nothing but zeroes as output:


Code:
0
0
0
0
0
0
0
0
0


I tested via:

Code:
cat <file>|nawk -F, '{$1,"     ""%d\n",$1}'

and my output has the correct output from $1, but "%d\n" won't output the decimal equivalent:


Code:
0x0C0     0
0x011     0
0x009     0
0x011     0
0x00E     0
0x008     0
0x034     0
0x001     0
0x00E     0
0x034     0
0x00F     0
0x009     0



So what am I missing? I have had it suggested that printf is different in awk than in the shell but that seemed wrong from what I read.
Last edited by PCGameGuy; 04-03-2012 at 07:20 PM.. Reason: Edited for clarity
 

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LEARN ABOUT DEBIAN

ppmcolormask

ppmcolormask(1) 					      General Commands Manual						   ppmcolormask(1)

NAME

       ppmcolormask - produce mask of areas of a certain color in a PPM file

SYNOPSIS

       ppmcolormask color [ppmfile]

DESCRIPTION

       Reads  a PPM file as input.  Produces a PBM (bitmap) file as output.  The output file is the same dimensions as the input file and is black
       in all places where the input file is the color color, and white everywhere else.

       The output of ppmcolormask is useful as an alpha mask input to pnmcomp.	Note that you can generate such an alpha mask automatically as you
       convert to PNG format with pnmtopng(1).	Use its -transparent option.

       ppmfile is the input file.  If you don't specify ppmfile, the input is from Standard Input.

       The output goes to Standard Output.

       You can specify color five ways:

       o      An X11-style color name (e.g.  black).

       o      An X11-style hexadecimal specifier: rgb:r/g/b, where r g and b are each 1- to 4-digit hexadecimal numbers.

       o      An X11-style decimal specifier: rgbi:r/g/b, where r g and b are floating point numbers between 0 and 1.

       o      For backwards compatibility, an old-X11-style hexadecimal number: #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.

       o      For  backwards  compatibility, a triplet of numbers separated by commas: r,g,b, where r g and b are floating point numbers between 0
	      and 1.  (This style was added before MIT came up with the similar rgbi style.)

SEE ALSO

       pgmtoppm(1), pnmcomp(1), pbmmask(1), ppm(5)

AUTHOR

       Bryan Henderson (bryanh@giraffe-data.com)

								   14 April 2000						   ppmcolormask(1)
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