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|
#! /usr/bin/perl -s
#
# 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)
{
print "Usage: $0 direction <Inputfile> <Outputfile> \n";
exit;
}
open(CARPETFILE, "<$ARGV[1]") || die "Unable to find file \"$ARGV[1]\".";
#
# Open the output file for the base grid.
#
$file = $ARGV[2]."_0.xg";
my $fh = new FileHandle(">$file") || die "Unable to open file \"$file\".";
push(@outputfilelist,$fh);
#
# Find the correct column for the spatial coordinate; requires a magic number
#
$direction = $ARGV[0]+9;
$flag = 0;
$timeset = 0;
$refinementlevel = 0;
$componentflag[0] = 0;
while (<CARPETFILE>)
{
$line = $_;
if(/^\#/) # The line is a header comment
{
if ($flag==1) # It's a new level and there is data to output
{
$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] = $1; # Which component?
#
# If no file exists for this refinement level,
# open and add filehandle to array
#
if ($refinementlevel > $#outputfilelist)
{
for ($i = $#outputfileflist+1; $i < $refinementlevel+1; $i++)
{
$file = $ARGV[2]."_".$i.".xg";
my $fh = new FileHandle(">$file") || die "Unable to open file \"$file\".";
$outputfilelist[$i]=$fh;
}
}
}
# 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;
$timeset = $data[8]; # Magic number gives the Cactus time
@outputdata = ("\n\"Time = ",$timeset,@outputdata);
}
push(@outputdata, $data[$direction], " ", $data[12]);
}
}
#
# At end of file, so output final data set.
#
$fh = $outputfilelist[$refinementlevel];
print $fh @outputdata;
foreach $fh (@outputfilelist)
{
close($fh);
}
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