#!/usr/local/bin/perl

use strict;
use warnings;
use Data::Dumper;
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;


$/ = "\nnet '";
while (my $record = <DATA>){
  my %db_record = process_record($record);
  # write_record(%db_record);
  print Dumper \%db_record;
}

sub process_record {
  
  my ($record) = @_;
  my @parts = split /Connections for net/, $record;
  
  my ($net_id, $part_one_details) = split /\s*:\s*/, $parts[0], 2;
  my (undef,   $part_two_details) = split /\s*:\s*/, $parts[1], 2;;

  my $part_one = process_part_one($part_one_details);
  my $part_two = process_part_two($part_two_details);
  
  my %db;
  $db{$net_id}{part_one} = $part_one;
  $db{$net_id}{part_two} = $part_two;
  return %db;
}

sub process_part_one {
  my ($part) = @_;
  $part =~ s/(total wire length:.*?)\n/$1/;
  my %flds = trim(split(/:|\n/, $part));
  return {%flds};
}

sub process_part_two {
  my ($part) = @_;
  #my (undef, $data) = split /:/, $part;
  my @lines = split /\n/, $part;
  my ($spec_line, $id, $pin, %rec);
  for my $line (@lines){
    next unless $line;
    next if $line =~ /------/;
    last if $line =~ /net '/; #'
    if ($line =~ /(Driver|Load)/){
      $spec_line = 1;
      $pin = $1;
      next;
    }
    my @flds = grep{$_} split /\s{2,}/, $line;
    if ($spec_line == 1){
      $spec_line++;
      $id = trim($flds[0]);
      push @{$rec{$pin}{$id}}, trim($flds[1]);
    }
    else{
      push @{$rec{$pin}{$id}}, trim(@flds);
      $spec_line = 1;
    }
      
      
  }
  return \%rec;
}
    
sub write_record{
  my (%db_record) = @_;
  # do something with data in %db_record
  return;
}

sub trim {
  my @copy = @_;
  for (@copy){
    s/^\s+//;
    s/\s+$//;
    s/\s+/ /g;
  }
  return wantarray ? @copy : pop @copy;
}



__DATA__
net 'IR_REG_INST_INT[20]':
    dont_touch:         FALSE
    pin capacitance:    0.00458335
    wire capacitance:   0.00103955
    total capacitance:  0.0056229
    wire resistance:    0.0663061
    number of drivers:  1
    number of loads:    2
    number of pins:     3
    total wire length:   9.20 (Routed)
          X_length = 0.96, Y_length = 8.24
    number of vias:     6

Connections for net 'IR_REG_INST_INT[20]':

    Driver Pins         Type                Pin Cap        Pin Loc
    ------------        ----------------    --------       --------
    U195/o              Output Pin (invx20)
                                            0.00162106     [1.12 409.88]

    Load Pins           Type                Pin Cap        Pin Loc
    ------------        ----------------    --------       --------
    U196/c              Input Pin (and3x10)
                                            0.00161077     [1.131 401.15]
    U1460/a             Input Pin (or2x05)
                                            0.00135152     [1.68 409.22]

net 'IR_REG_INST_INT[30]':
    dont_touch:         FALSE
    pin capacitance:    0.00458335
    wire capacitance:   0.00103955
    total capacitance:  0.0056229
    wire resistance:    0.0663061
    number of drivers:  1
    number of loads:    2
    number of pins:     3
    total wire length:   9.20 (Routed)
          X_length = 0.96, Y_length = 8.24
    number of vias:     6

Connections for net 'IR_REG_INST_INT[30]':

    Driver Pins         Type                Pin Cap        Pin Loc
    ------------        ----------------    --------       --------
    U195/o              Output Pin (invx20)
                                            0.00162106     [1.12 409.88]

    Load Pins           Type                Pin Cap        Pin Loc
    ------------        ----------------    --------       --------
    U196/c              Input Pin (and3x10)
                                            0.00161077     [1.131 401.15]
    U1460/a             Input Pin (or2x05)
                                            0.00135152     [1.68 409.22]