Bug 680722: added invalid character checks to WebGL functions r=bjacob

content/canvas/src/WebGLValidateStrings.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2011 Apple Inc. All rights reserved.
+ * Copyright (C) 2011 Mozilla Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * 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.
+ */
+
+#ifndef WEBGLVALIDATESTRINGS_H_
+#define WEBGLVALIDATESTRINGS_H_
+
+#include "WebGLContext.h"
+
+namespace mozilla {
+
+// The following function was taken from the WebKit WebGL implementation,
+// which can be found here:
+// http://trac.webkit.org/browser/trunk/Source/WebCore/html/canvas/WebGLRenderingContext.cpp#L123
+/****** BEGIN CODE TAKEN FROM WEBKIT ******/
+bool WebGLContext::ValidateGLSLCharacter(PRUnichar c)
+{
+    // Printing characters are valid except " $ ` @ \ ' DEL.
+    if (c >= 32 && c <= 126 &&
+        c != '"' && c != '$' && c != '`' && c != '@' && c != '\\' && c != '\'')
+    {
+        return true;
+    }
+
+    // Horizontal tab, line feed, vertical tab, form feed, carriage return are also valid.
+    if (c >= 9 && c <= 13) {
+        return true;
+    }
+
+    return false;
+}
+/****** END CODE TAKEN FROM WEBKIT ******/
+
+} // end namespace mozilla
+
+#endif // WEBGLVALIDATESTRINGS_H_