package Image::EXIF;

use 5.006;
use strict;
use warnings;
use Carp;

require Exporter;
require DynaLoader;
use AutoLoader;

use Data::Dumper;

our @ISA = qw(Exporter DynaLoader);

sub get_image_info($);

# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.

# This allows declaration	use Image::EXIF ':all';
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK
# will save memory.
our %EXPORT_TAGS = ( 'all' => [ qw() ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw();
our $VERSION = '1.00.4';

sub AUTOLOAD {
    # This AUTOLOAD is used to 'autoload' constants from the constant()
    # XS function.  If a constant is not found then control is passed
    # to the AUTOLOAD in AutoLoader.

    my $constname;
    our $AUTOLOAD;
    ($constname = $AUTOLOAD) =~ s/.*:://;
    croak "& not defined" if $constname eq 'constant';
    my $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
	if ($! =~ /Invalid/ || $!{EINVAL}) {
	    $AutoLoader::AUTOLOAD = $AUTOLOAD;
	    goto &AutoLoader::AUTOLOAD;
	}
	else {
	    croak "Your vendor has not defined Image::EXIF macro $constname";
	}
    }
    {
	no strict 'refs';
	# Fixed between 5.005_53 and 5.005_61
	if ($] >= 5.00561) {
	    *$AUTOLOAD = sub () { $val };
	}
	else {
	    *$AUTOLOAD = sub { $val };
	}
    }
    goto &$AUTOLOAD;
}

bootstrap Image::EXIF $VERSION;

# Preloaded methods go here.

# Autoload methods go after =cut, and are processed by the autosplit program.

sub new
{
	my ($class, $file_name) = @_;

	my $self = {};
	bless $self, $class;

	$self->file_name($file_name) if ($file_name && $file_name ne '');
	$self->{errstr} = [()];

	$self;
}

sub file_name($;$)
{
	my $self = shift;

	if (@_){
		my $tmp = shift || '';
		$self->{file_name} = $tmp if ($tmp ne '');
	}

	if ($self->{file_name} && $self->{file_name} ne '' ){
		c_read_file($self->{file_name});
	} else {
		push @{$self->{errstr}}, 'Please set file_name';
	}

	$self->{file_name};
}

sub error($)
{
	my $self = shift;

	@{$self->{errstr}};
}

sub errstr($)
{
	my $self = shift;

	shift @{$self->{errstr}};
}

sub get_camera_info($)
{
	my $self = shift;

	my $hash;

	if (c_errstr()){
		push @{$self->{errstr}}, c_errstr();
	} else {
		c_get_camera_info();
		while(my ($fld, $val) = c_fetch()){
			$val =~ s/\s*$//g;
			$fld eq '' && next;
	                $hash->{$fld} = $val;
        	}
	}
	$hash;
}

sub get_image_info($)
{
	my $self = shift;

	my $hash;

	if (c_errstr()){
		push @{$self->{errstr}}, c_errstr();
	} else {
		c_get_image_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{$fld} = $val;
        	}
	}
	$hash;
}

sub get_other_info($)
{
	my $self = shift;

	my $hash;

	if (c_errstr()){
		push @{$self->{errstr}}, c_errstr();
	} else {
		c_get_other_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{$fld} = $val;
        	}
	}
	$hash;
}

sub get_unknown_info($)
{
	my $self = shift;

	my $hash;

	if (c_errstr()){
		push @{$self->{errstr}}, c_errstr();
	} else {
		c_get_unknown_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{$fld} = $val;
        	}
	}
	$hash;
}

sub get_all_info($)
{
	my $self = shift;

	my $hash;

	if (c_errstr()){
		push @{$self->{errstr}}, c_errstr();
		return;
	} else {
		c_get_camera_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{camera}->{$fld} = $val;
        	}

		c_get_image_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{image}->{$fld} = $val;
        	}

		c_get_other_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{other}->{$fld} = $val;
        	}

		c_get_unknown_info();
		while(my ($fld, $val) = c_fetch()){
			$fld eq '' && next;
			$val =~ s/\s*$//g;
	                $hash->{unknown}->{$fld} = $val;
        	}
	}

	$hash;
}

sub DESTROY
{
	c_close_all();
}

1;
__END__

=head1 NAME

Image::EXIF - Perl extension for exif library

=head1 SYNOPSIS

  use Image::EXIF;
  use Data::Dumper;

   my $exif = new Image::EXIF($file_name);

      or

   my $exif = new Image::EXIF;
   $exif->file_name($file_name);

   my $image_info = $exif->get_image_info(); # hash reference
   my $camera_info = $exif->get_camera_info(); # hash reference
   my $other_info = $exif->get_other_info(); # hash reference
   my $point_shoot_info = $exif->get_point_shoot_info(); # hash reference
   my $unknown_info = $exif->get_unknown_info(); # hash reference
   my $all_info = $exif->get_all_info(); # hash reference

   print $exif->error ?
	$exif->errstr : Dumper($all_info);

=head1 DESCRIPTION

Perl Package Image::EXIF based on utility exiftags v0.99.1
by Eric M. Johnston, emj@postal.net, http://johnst.org/sw/exiftags/.
Actually it's just a wrapper. Weak PHP's support of EXIF
made me write it.
If you wanna improve it - go ahead. I did this module only
because nobody did it before.

=head2 EXPORT

Nothing.


=head1 AUTHOR

sergey s prozhogin<lt>ccpro@rrelaxo.org.ru<gt>

=head1 SEE ALSO

L<exiftags>.

=cut