Current File : //usr/share/perl5/vendor_perl/ExtUtils/Typemaps/Cmd.pm
package ExtUtils::Typemaps::Cmd;
use 5.006001;
use strict;
use warnings;
our $VERSION = '3.18';
use ExtUtils::Typemaps;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(embeddable_typemap);
our %EXPORT_TAGS = (all => \@EXPORT);
sub embeddable_typemap {
my @tms = @_;
# Get typemap objects
my @tm_objs = map [$_, _intuit_typemap_source($_)], @tms;
# merge or short-circuit
my $final_tm;
if (@tm_objs == 1) {
# just one, merge would be pointless
$final_tm = shift(@tm_objs)->[1];
}
else {
# multiple, need merge
$final_tm = ExtUtils::Typemaps->new;
foreach my $other_tm (@tm_objs) {
my ($tm_ident, $tm_obj) = @$other_tm;
eval {
$final_tm->merge(typemap => $tm_obj);
1
} or do {
my $err = $@ || 'Zombie error';
die "Failed to merge typ";
}
}
}
# stringify for embedding
return $final_tm->as_embedded_typemap();
}
sub _load_module {
my $name = shift;
return eval "require $name; 1";
}
SCOPE: {
my %sources = (
module => sub {
my $ident = shift;
my $tm;
if (/::/) { # looks like FQ module name, try that first
foreach my $module ($ident, "ExtUtils::Typemaps::$ident") {
if (_load_module($module)) {
eval { $tm = $module->new }
and return $tm;
}
}
}
else {
foreach my $module ("ExtUtils::Typemaps::$ident", "$ident") {
if (_load_module($module)) {
eval { $tm = $module->new }
and return $tm;
}
}
}
return();
},
file => sub {
my $ident = shift;
return unless -e $ident and -r _;
return ExtUtils::Typemaps->new(file => $ident);
},
);
# Try to find typemap either from module or file
sub _intuit_typemap_source {
my $identifier = shift;
my @locate_attempts;
if ($identifier =~ /::/ || $identifier !~ /[^\w_]/) {
@locate_attempts = qw(module file);
}
else {
@locate_attempts = qw(file module);
}
foreach my $source (@locate_attempts) {
my $tm = $sources{$source}->($identifier);
return $tm if defined $tm;
}
die "Unable to find typemap for '$identifier': "
. "Tried to load both as file or module and failed.\n";
}
} # end SCOPE
=head1 NAME
ExtUtils::Typemaps::Cmd - Quick commands for handling typemaps
=head1 SYNOPSIS
From XS:
INCLUDE_COMMAND: $^X -MExtUtils::Typemaps::Cmd \
-e "print embeddable_typemap(q{Excommunicated})"
Loads C<ExtUtils::Typemaps::Excommunicated>, instantiates an object,
and dumps it as an embeddable typemap for use directly in your XS file.
=head1 DESCRIPTION
This is a helper module for L<ExtUtils::Typemaps> for quick
one-liners, specifically for inclusion of shared typemaps
that live on CPAN into an XS file (see SYNOPSIS).
For this reason, the following functions are exported by default:
=head1 EXPORTED FUNCTIONS
=head2 embeddable_typemap
Given a list of identifiers, C<embeddable_typemap>
tries to load typemaps from a file of the given name(s),
or from a module that is an C<ExtUtils::Typemaps> subclass.
Returns a string representation of the merged typemaps that can
be included verbatim into XS. Example:
print embeddable_typemap(
"Excommunicated", "ExtUtils::Typemaps::Basic", "./typemap"
);
This will try to load a module C<ExtUtils::Typemaps::Excommunicated>
and use it as an C<ExtUtils::Typemaps> subclass. If that fails, it'll
try loading C<Excommunicated> as a module, if that fails, it'll try to
read a file called F<Excommunicated>. It'll work similarly for the
second argument, but the third will be loaded as a file first.
After loading all typemap files or modules, it will merge them in the
specified order and dump the result as an embeddable typemap.
=head1 SEE ALSO
L<ExtUtils::Typemaps>
L<perlxs>
=head1 AUTHOR
Steffen Mueller C<<smueller@cpan.org>>
=head1 COPYRIGHT & LICENSE
Copyright 2012 Steffen Mueller
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
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