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#! /usr/bin/perl -sw
#
# Blame Ian Hawke for not checking that Scott had already written a C
# program to do this add so writing a perl version instead
#
# Given an output file in CarpetIOASCII 1d format, strip to ygraph format.
# The arguments should be direction (x=0,y=1,z=2) and filename.
# Output is to a file. Only the base name should be given.
# The base will be appended with _<level>.xg
#
# Example:
#
# Carpet2ygraph.pl 0 alp.xl alp_x
#
# produces alp_x_<d>.xg where <d> is the refinement level.
#
# The headers of the Carpet files are just copied with the addition of
# the correct time for ygraph, and the different comment marker.
#
# This script is a much altered version of Tom Goodale's convergence
# testing scripts.
#
use FileHandle;
if(@ARGV != 3 or $ARGV[0] !~ /^0|1|2$/)
{
print "Usage: $0 direction <Inputfile> <Outputfile>\n";
print " where direction is either 0, 1, 2\n";
exit;
}
open(CARPETFILE, "<$ARGV[1]") || die "Unable to find file \"$ARGV[1]\".";
my $direction = $ARGV[0]+9;
my $flag = 0;
my $refinementlevel = 0;
my %componentflag = ();
$componentflag{$refinementlevel} = 0;
my @outputdata = ("\n");
#
# Open the output file for the base grid.
#
my $file = $ARGV[2]."_$refinementlevel.xg";
my %outputfilelist = ();
$outputfilelist{$refinementlevel} =
new FileHandle(">$file") || die "Unable to open file \"$file\".";
#
# Find the correct column for the spatial coordinate; requires a magic number
#
while (<CARPETFILE>)
{
# skip empty lines
next if (/^(\s)*$/);
$line = $_;
if(/^\#/) # The line is a header comment
{
if ($flag==1) # It's a new level and there is data to output
{
my $fh = $outputfilelist{$refinementlevel};
print $fh @outputdata;
@outputdata=("\n");
$flag = 0;
}
if ($line =~ /refinement level ([0-9])/) # Line gives ref. level
{
$refinementlevel = $1;
$line =~ /component ([0-9+])/;
$componentflag{$refinementlevel} = $1; # Which component?
# If no file exists for this refinement level,
# open and add filehandle to list
if (not defined $outputfilelist{$refinementlevel})
{
$file = $ARGV[2] . "_$refinementlevel.xg";
$outputfilelist{$refinementlevel} =
new FileHandle(">$file") || die "Unable to open file \"$file\".";
}
}
# Only output the headers if this is the zero component
# FIXME: what happens if component 0 isn't output first?
if (0 == $componentflag{$refinementlevel})
{
push(@outputdata, ("\"",$line)); # Add ygraph comment marker
}
else
{
$flag = 1;
@outputdata=("");
}
}
else # The line contains real data
{
@data = split(/[ \t]+/,$line);
if ($flag== 0) # This is the first line of data
{
$flag = 1;
my $timeset = $data[8]; # Magic number gives the Cactus time
@outputdata = ("\n\"Time = $timeset",@outputdata);
}
chomp ($data[12]);
push(@outputdata, "$data[$direction] $data[12]\n");
}
}
#
# At end of file, so output final data set.
#
my $fh = $outputfilelist{$refinementlevel};
print $fh @outputdata;
foreach $refinementlevel (keys %outputfilelist)
{
close($outputfilelist{$refinementlevel});
}
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