You can get rid of all that pipeline, a better approach would be:
Code:
awk '
...
Your solution is more efficient, but in the special case of very large numbers, bc's arbitrary precision would be better.
AWK stores all numbers (integers included) as doubles, so, assuming IEEE 754 64-bit floating point representation, very large is somewhere around 2^53 (on the order of 9 x 10^15, short scale quadrillion). Beyond that most integers cannot be represented without loss of precision.
I realize that it's unlikely that numbers of this magnitude will arise, given that the OP's solution only handles 5 values and none are very large. I simply mention the possibility for completeness' sake.
A simpler pipeline which doesn't hardcode operands:
Code:
sed 's/m/*1024/; s/g/*1048576/' | paste -sd+ - | bc
Regards,
Alister
Last edited by alister; 07-04-2013 at 09:54 PM..
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LEARN ABOUT POSIX
vdltodmx
vdltodmx(1) General Commands Manual vdltodmx(1)NAME
vdltodmx - dmx configuration file parser and printer
SYNOPSIS
vdltodmx infile outfile
DESCRIPTION
vdltodmx reads the input file, which should be in VDL configuration file format. After a successful parse, a file in Xdmx configuration
file format is written to the output file.
The VDL file format is used with xmovie, which is available from http://www.llnl.gov/icc/lc/img/xmovie/xmovie.html
EXAMPLE
Given the following VDL-format file:
0
2
#
#
2560 2048 Left two-thirds [restrict=*:2]
2
:2.1 1280 2048 0 0 0 0
:2.2 1280 2048 1280 0 0 0
4
1280 1024 0 0
1280 1024 0 1024
1280 1024 1280 0
1280 1024 1280 1024
#
2560 2048 Right two-thirds [restrict=*:2]
2
:2.2 1280 2048 0 0 0 0
:2.3 1280 2048 1280 0 0 0
4
1280 1024 1280 0
1280 1024 1280 1024
1280 1024 2560 0
1280 1024 2560 1024
the following DMX-format file will be produced:
#
#
virtual "Left two-thirds" 2560x2048 {
display :2.1 1280x2048;
display :2.2 1280x2048 @1280x0;
}
#
virtual "Right two-thirds" 2560x2048 {
display :2.2 1280x2048;
display :2.3 1280x2048 @1280x0;
}
BUGS
If the VDL file is not in the expected format, the program will probably dump core.
SEE ALSO Xdmx(1), xdmxconfig(1), vdl(3), xmovie(1)X Version 11 xorg-server 1.12.4 vdltodmx(1)