#!/usr/local/bin/perl
use strict;
use warnings;
use Data::Dumper;

sub charAt { return substr $_[0], $_[1], 1; }

my $line = "foo=1.0  bar=2.0   baz=hoge";
my @pos = grep { charAt($line, $_) eq '=' } (0 .. (length($line) - 1));
my %table;

foreach my $kv_pos (@pos) {
  my($k0, $k1, $v0, $v1);
  for ($k0 = $k1 = $kv_pos - 1; $k0 > 0 && charAt($line, $k0-1) ne ' '; --$k0) {}
  for ($v0 = $v1 = $kv_pos + 1; $v1 < length($line) && charAt($line, $v1) ne ' '; ++$v1) {}
  $table{substr($line, $k0, $k1-$k0+1)} = substr($line, $v0, $v1-$v0);
}

print Dumper @pos;
print Dumper \%table;