Add Utils.pm

Add Utils.pm for test utilities. This currently just contains one function:
disabled which checks if a feature is disabled based on the output of
openssl list -disabled
Reviewed-by: NRichard Levitte <levitte@openssl.org>

test/testlib/OpenSSL/Test/Utils.pm

+package OpenSSL::Test::Utils;
+
+use strict;
+use warnings;
+
+use Exporter;
+use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
+$VERSION = "0.1";
+@ISA = qw(Exporter);
+@EXPORT = qw(disabled);
+
+=head1 NAME
+
+OpenSSL::Test::Utils - test utility functions
+
+=head1 SYNOPSIS
+
+  use OpenSSL::Test::Utils;
+
+  disabled("dh");
+
+=head1 DESCRIPTION
+
+This module provides utility functions for the testing framework.
+
+=cut
+
+use OpenSSL::Test;
+
+=over 4
+
+=item B<disabled ARRAY>
+
+In a scalar context returns 1 if any of the features in ARRAY is disabled.
+
+In an array context returns an array with each element set to 1 if the
+corresponding feature is disabled and 0 otherwise.
+
+=back
+
+=cut
+
+our %disabled;
+my $disabled_set = 0;
+
+sub check_disabled {
+#print STDERR "Running check_disabled\n";
+    foreach (run(app(["openssl", "list", "-disabled"]), capture => 1)) {
+        chomp;
+        next if /:/;    # skip header
+        $disabled{lc $_} = 1;
+    }
+    $disabled_set = 1;
+}
+
+# args:
+#  list of features to check
+sub disabled {
+    check_disabled() unless $disabled_set;
+    if (wantarray) {
+        my @ret;
+        foreach (@_) {
+            push @ret, exists $disabled{lc $_} ? 1 : 0;
+        }
+        return @ret;
+    }
+    foreach (@_) {
+        return 1 if exists $disabled{lc $_};
+    }
+    return 0;
+}
+
+=head1 SEE ALSO
+
+L<OpenSSL::Test>
+
+=head1 AUTHORS
+
+Stephen Henson E<lt>steve@openssl.orgE<gt> with inspiration
+from Richard Levitte E<lt>levitte@openssl.orgE<gt>
+
+=cut
+
+1;