1 files changed, 103 insertions, 0 deletions
diff --git a/Tools/Scripts/webkitperl/features.pm b/Tools/Scripts/webkitperl/features.pm
new file mode 100644
index 000000000..1df56405b
--- /dev/null
+++ b/Tools/Scripts/webkitperl/features.pm
@@ -0,0 +1,103 @@
+# Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved
+# Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
+# Copyright (C) 2010 Andras Becsi (abecsi@inf.u-szeged.hu), University of Szeged
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1.  Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# 2.  Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+# 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+#     its contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Module to share code to detect the existance of features in built binaries.
+
+use strict;
+use warnings;
+
+BEGIN {
+   use Exporter   ();
+   our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
+   $VERSION     = 1.00;
+   @ISA         = qw(Exporter);
+   @EXPORT      = qw(&checkWebCoreFeatureSupport
+                     &removeLibraryDependingOnFeature);
+   %EXPORT_TAGS = ( );
+   @EXPORT_OK   = ();
+}
+
+sub libraryContainsSymbol($$)
+{
+    my ($path, $symbol) = @_;
+
+    if (isCygwin() or isWindows()) {
+        # FIXME: Implement this for Windows.
+        return 0;
+    }
+
+    my $foundSymbol = 0;
+    if (-e $path) {
+        open NM, "-|", "nm", $path or die;
+        while (<NM>) {
+            $foundSymbol = 1 if /$symbol/; # FIXME: This should probably check for word boundaries before/after the symbol name.
+        }
+        close NM;
+    }
+    return $foundSymbol;
+}
+
+sub hasFeature($$)
+{
+    my ($featureName, $path) = @_;
+    my %symbolForFeature = (
+        "MathML" => "MathMLElement",
+        "SVG" => "SVGDefsElement", # We used to look for SVGElement but isSVGElement exists (and would match) in --no-svg builds.
+        "Accelerated Compositing" => "GraphicsLayer",
+        "3D Rendering" => "WebCoreHas3DRendering",
+        "3D Canvas" => "WebGLShader",
+        "MHTML" => "MHTMLArchive"
+    );
+    my $symbolName = $symbolForFeature{$featureName};
+    die "Unknown feature: $featureName" unless $symbolName;
+    return libraryContainsSymbol($path, $symbolName);
+}
+
+sub checkWebCoreFeatureSupport($$)
+{
+    my ($feature, $required) = @_;
+    my $libraryName = "WebCore";
+    my $path = builtDylibPathForName($libraryName);
+    my $hasFeature = hasFeature($feature, $path);
+    if ($required && !$hasFeature) {
+        die "$libraryName at \"$path\" does not include $hasFeature support.  See build-webkit --help\n";
+    }
+    return $hasFeature;
+}
+
+sub removeLibraryDependingOnFeature($$$)
+{
+    my ($libraryName, $featureName, $shouldHaveFeature) = @_;
+    my $path = builtDylibPathForName($libraryName);
+    return unless -x $path;
+
+    my $hasFeature = hasFeature($featureName, $path);
+    system "rm -f $path" if ($shouldHaveFeature xor $hasFeature);
+}
+
+1;