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#!/usr/bin/perl
use strict;
use warnings;
use utf8;
my ($file, $site) = @ARGV;
defined($site) or die "USAGE: $0 file site\n";
my %data = readData($file);
plotData(\%data, $site);
sub readData
{
my ($file) = @_;
open(FILE, "<", $file) or die "$0: Cannot open file : $!\n";
my $n;
my %data;
while (<FILE>) {
chomp;
my @temp = split; # omega, n
my $x = scalar(@temp);
die "$0: FATAL: $file : $. : Expecting 2 items, got $n instead\n" if ($x != 2);
my $omega = $temp[0];
if (!defined($n)) {
$n = $temp[1];
} else {
die "$0: FATAL: $file : $., expecting second number to be $n, got ".$temp[1]."\n" if ($n != $temp[1]);
}
my @values;
for (my $i = 0; $i < $n; ++$i) {
$_ = <FILE>;
chomp;
my @temp = split; # site, real, imag
my $x = scalar(@temp);
die "$0: FATAL: $file : $. : Expecting 3 items, got $x instead\n" if ($x != 3);
push @values, \@temp;
}
$data{"$omega"} = \@values;
}
close(FILE);
return %data;
}
sub plotData
{
my ($h, $site) = @_;
my $hasParens = 0;
foreach my $omega (sort {$a <=> $b} keys %$h) {
my $ptr = $h->{$omega};
my $n = scalar(@$ptr);
die "FATAL: $site >= $n\n" if ($site >= $n);
my $ptr2 = $ptr->[$site];
die "$0: Internal error, expecting 3 elements\n" if (scalar(@$ptr2) != 3);
my $x = $ptr2->[0];
die "$0: Internal error, expecting 1st element to be $site, got $x\n" if ($x != $site);
my $value1 = $ptr2->[1];
my $value2 = $ptr2->[2];
$hasParens = checkParens($value1, $value2);
if ($hasParens) {
($value1, $value2) = reIm($value2);
}
print "$omega $value1 $value2\n";
}
}
sub checkParens
{
my ($val1, $val2) = @_;
my $flag = hasParens($val1);
die "$0: INTERNAL error (parens)\n" if ($flag && !hasParens($val2));
return $flag;
}
sub hasParens
{
my ($val) = @_;
return ($val =~ /\(/);
}
sub reIm
{
my ($val) = @_;
my @temp = split/,/, $val;
scalar(@temp) == 2 or die "$0: Not a complex value $val\n";
my $re = $temp[0];
$re =~ s/\(//;
my $im = $temp[1];
$im =~ s/\)//;
return ($re, $im);
}
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