Simplify tests whether to run header checks

Turn lists into hashes and check for existence of an element using key
lookup. This leads to simpler testing code and is potentially faster.

Change-Id: Ibbf4f03ec64d6c295cc5e1664dfa73cd0ce8c272
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

bin/syncqt.pl

@@ -81,6 +81,8 @@ our @qpa_headers = ();
 
 # will be derived from sync.profile
 our %reverse_classnames = ();
+my %ignore_for_include_check = ();
+my %ignore_for_qt_begin_namespace_check = ();
 
 # global variables (modified by options)
 my $isunix = 0;
@@ -801,6 +803,8 @@ loadSyncProfile(\$basedir, \$out_basedir);
 @modules_to_sync = keys(%modules) if($#modules_to_sync == -1);
 
 my %allmoduleheadersprivate = map { $_ => 1 } @allmoduleheadersprivate;
+%ignore_for_include_check = map { $_ => 1 } @ignore_for_include_check;
+%ignore_for_qt_begin_namespace_check = map { $_ => 1 } @ignore_for_qt_begin_namespace_check;
 
 $isunix = checkUnix; #cache checkUnix
 
@@ -1157,12 +1161,8 @@ if($check_includes) {
                                 $public_header = 0 if($header eq $_);
                             }
                             if($public_header) {
-                                foreach (@ignore_for_include_check) {
-                                    $public_header = 0 if($header eq $_);
-                                }
-                                foreach(@ignore_for_qt_begin_namespace_check) {
-                                    $header_skip_qt_begin_namespace_test = 1 if ($header eq $_);
-                                }
+                                $public_header = 0 if ($ignore_for_include_check{$header});
+                                $header_skip_qt_begin_namespace_test = 1 if ($ignore_for_qt_begin_namespace_check{$header});
                             }
                         }