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package Enum;
use strict;
use warnings;
BEGIN {
use Exporter ();
our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
# set the version for version checking
$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = ( );
%EXPORT_TAGS = ( );
# your exported package globals go here,
# as well as any optionally exported functions
@EXPORT_OK = ( );
}
our @EXPORT_OK;
# class Enum
# {
# bool flags;
# string type;
# string module;
# string c_type;
#
# string array elem_names;
# string array elem_values;
#
# bool mark;
# }
sub new
{
my ($def) = @_;
my $self = {};
bless $self;
$def =~ s/^\(//;
$def =~ s/\)$//;
$$self{mark} = 0;
$$self{flags} = 0;
$$self{elem_names} = [];
$$self{elem_values} = [];
# snarf down the fields
if($def =~ s/^define-(enum|flags)-extended (\S+)//)
{
$$self{type} = $2;
$$self{flags} = 1 if($1 eq "flags");
}
$$self{module} = $1 if($def =~ s/\(in-module "(\S+)"\)//);
$$self{c_type} = $1 if($def =~ s/\(c-name "(\S+)"\)//);
# values are compound lisp statement
if($def =~ s/\(values((?: '\("\S+" "\S+" "[^"]+"\))*) \)//)
{
$self->parse_values($1);
}
if($def !~ /^\s*$/)
{
GtkDefs::error("Unhandled enum def ($def) in $$self{module}\::$$self{type}\n")
}
# this should never happen
warn if(scalar(@{$$self{elem_names}}) != scalar(@{$$self{elem_values}}));
return $self;
}
sub parse_values($$)
{
my ($self, $value) = @_;
# break up the value statements
foreach(split(/\s*'*[()]\s*/, $value))
{
next if($_ eq "");
if(/^"\S+" "(\S+)" "([^"]+)"$/)
{
my ($name, $value) = ($1, $2);
# cut off the module prefix, e.g. GTK_
$name =~ s/^[^_]+_//;
push(@{$$self{elem_names}}, $name);
push(@{$$self{elem_values}}, $value);
}
else
{
GtkDefs::error("Unknown value statement ($_) in $$self{c_type}\n");
}
}
}
sub beautify_values($)
{
my ($self) = @_;
return if($$self{flags});
my $elem_names = $$self{elem_names};
my $elem_values = $$self{elem_values};
my $num_elements = scalar(@$elem_values);
return if($num_elements == 0);
my $first = $$elem_values[0];
return if($first !~ /^-?[0-9]+$/);
my $prev = $first;
# Continuous? (Aliases to prior enum values are allowed.)
foreach my $value (@$elem_values)
{
return if(($value < $first) || ($value > $prev + 1));
$prev = $value;
}
# This point is reached only if the values are a continuous range.
# 1) Let's kill all the superfluous values, for better readability.
# 2) Substitute aliases to prior enum values.
my %aliases = ();
for(my $i = 0; $i < $num_elements; ++$i)
{
my $value = \$$elem_values[$i];
my $alias = \$aliases{$$value};
if(defined($$alias))
{
$$value = $$alias;
}
else
{
$$alias = $$elem_names[$i];
$$value = "" unless($first != 0 && $$value == $first);
}
}
}
sub build_element_list($$$$)
{
my ($self, $ref_flags, $ref_no_gtype, $indent) = @_;
my @subst_in = [];
my @subst_out = [];
# Build a list of custom substitutions, and recognize some flags too.
foreach(@$ref_flags)
{
if(/^\s*(NO_GTYPE)\s*$/)
{
$$ref_no_gtype = $1;
}
elsif(/^\s*(get_type_func=)(\s*)\s*$/)
{
my $part1 = $1;
my $part2 = $2;
}
elsif(/^\s*s#([^#]+)#([^#]*)#\s*$/)
{
push(@subst_in, $1);
push(@subst_out, $2);
}
elsif($_ !~ /^\s*$/)
{
return undef;
}
}
my $elem_names = $$self{elem_names};
my $elem_values = $$self{elem_values};
my $num_elements = scalar(@$elem_names);
my $elements = "";
for(my $i = 0; $i < $num_elements; ++$i)
{
my $name = $$elem_names[$i];
my $value = $$elem_values[$i];
for(my $ii = 0; $ii < scalar(@subst_in); ++$ii)
{
$name =~ s/${subst_in[$ii]}/${subst_out[$ii]}/;
$value =~ s/${subst_in[$ii]}/${subst_out[$ii]}/;
}
$elements .= "${indent}${name}";
$elements .= " = ${value}" if($value ne "");
$elements .= ",\n" if($i < $num_elements - 1);
}
return $elements;
}
sub dump($)
{
my ($self) = @_;
print "<enum module=\"$$self{module}\" type=\"$$self{type}\" flags=$$self{flags}>\n";
my $elem_names = $$self{elem_names};
my $elem_values = $$self{elem_values};
for(my $i = 0; $i < scalar(@$elem_names); ++$i)
{
print " <element name=\"$$elem_names[$i]\" value=\"$$elem_values[$i]\"/>\n";
}
print "</enum>\n\n";
}
1; # indicate proper module load.
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