use strict;
use warnings;

use Carp;


use Dumpvalue;
my $d = new Dumpvalue; $d->compactDump(1);

my($h) = {};
my(@lines) = <DATA>;

parse_var_spec($h, \@lines);

$d->dumpValue($h);


# This is used recursively.

sub parse_var_spec {
	my($hash, $lines, $in_sub_parse) = @_;

	# This is probably very ineffective, so rewrite to send an offset
	# along, instead. :-)
	while(scalar(@$lines)) {
		my $l = shift @$lines;

		next		if $l =~ m"^\s*#";	# Comment.
		next		if $l =~ /^\s*$/;	# Empty line.

		# Handle return if parsed a subdef:
		if ($in_sub_parse && $l =~ s/^\s*>//) {
			# Value will come directly after this.
			unshift @$lines, $l;
			return;
		}

		if ($l =~ s/^\s*(float|string)\s+([a-zA-Z][a-zA-Z0-9_]*)//) {
			# Got type and var name.
			my($type)		= $1;
			my($var)		= $2;
			$hash->{$var}->{type} = $type;

			# Are there subdata?
			if ($l =~ /^\s*$/) {
				$l			= $lines->[0];
				croak "Bad def of $type '$var'"	if !($l =~ s/^\s*<\s*//);
				$lines->[0] = $l;		# Put back without '<'.

				my(%subs);
				# Recursive call that parse a bit different:
				parse_var_spec(\%subs, $lines, 1);

				# Setup sub-values:
				# Will it always be a 'UI' prefix? Should you look at the
				# start of the variables?
				# Ah, do the details as an exercise.

				$hash->{$var}->{ui} = \%subs;
				$l			= shift @$lines;
			}

			# Now, is it just a value?
			if ($l =~ /^\s*=\s*(.*)\s*;\s*$/) {
				my($val)	= $1;
				if ($type eq 'string') {
					if ($val =~ /^"(.*)"$/) {
						# XXXX Extra parsing of string here for \n, etc.
						$hash->{$var}->{value} = $1;
					} else {
						croak "Bad value '$val' for string '$var'";
					}
				} elsif ($type eq 'float') {
					# XXXXX Parse out float value from $val better
					# than this :-)
					$val =~ s/f$//;
					$hash->{$var}->{value} = $val + 0.0;
				} else {
					# XXXXX etc.
					croak "Unknown type $type for var '$var'";
				}
			} else {
				croak "Couldn't parse value from '$var', value '$l'";
			}
		}
	}
}

__DATA__
string UIWidget = "slider";
float  foohoo   = 0.4532;
string bahoo
<
  string SUBtjo   = "gznk";

  string SUBhej   = "sassa rassa";
  float SUBba
  <
    float  XXfoo  = 4711f;
    string XXallan= "trutt trutt";
  > = -122.22f;

  float  SUBbaa   = 23.23f;
> = "hejsvjs";

string foo      = "barf";


float myVarA
<
float UIMin = 1;
float UIMax = 0;
float UIStep = .001;
string UIWidget = "slider";
> =  0.5f;

float myVarB = 1.0;

float4 myVarC = {1,0,0,1};

##</code><code>##

'UIWidget' => HASH(0x8148b44)
   'type' => 'string', 'value' => 'slider'
'bahoo' => HASH(0x81c994c)
   'type' => 'string'
   'ui' => HASH(0x81c96ac)
      'SUBba' => HASH(0x81c9e44)
         'type' => 'float'
         'ui' => HASH(0x81c9ce8)
            'XXallan' => HASH(0x81ca0fc)
               'type' => 'string', 'value' => 'trutt trutt'
            'XXfoo' => HASH(0x81c9b8c)
               'type' => 'float', 'value' => 4711
         'value' => '-122.22'
      'SUBbaa' => HASH(0x81c9bbc)
         'type' => 'float', 'value' => 23.23
      'SUBhej' => HASH(0x81c9b68)
         'type' => 'string', 'value' => 'sassa rassa'
      'SUBtjo' => HASH(0x81c9b50)
         'type' => 'string', 'value' => 'gznk'
   'value' => 'hejsvjs'
'foo' => HASH(0x81c9be0)
   'type' => 'string', 'value' => 'barf'
'foohoo' => HASH(0x81c9640)
   'type' => 'float', 'value' => 0.4532
'myVarA' => HASH(0x81c9c04)
   'type' => 'float'
   'ui' => HASH(0x81c9964)
      'UIMax' => HASH(0x81cee38)
         'type' => 'float', 'value' => 0
      'UIMin' => HASH(0x81c9c1c)
         'type' => 'float', 'value' => 1
      'UIStep' => HASH(0x81cee5c)
         'type' => 'float', 'value' => 0.001
      'UIWidget' => HASH(0x81cee80)
         'type' => 'string', 'value' => 'slider'
   'value' => 0.5
'myVarB' => HASH(0x81c9c64)
   'type' => 'float', 'value' => 1