Parse Sky entities according to the spec

sky/engine/core/html/parser/HTMLEntityParser.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2010 Google, Inc. 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
@@ skipping 13 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLEntityParser_h
 #define HTMLEntityParser_h
 
 #include "platform/text/SegmentedString.h"
 
 namespace blink {
 
-class DecodedHTMLEntity {
+class HTMLEntityParser {
+public:
+    typedef Vector<UChar, 32> OutputBuffer;
+
+    HTMLEntityParser();
+    ~HTMLEntityParser();
+
+    void reset();
+    bool parse(SegmentedString&);
+
+    const OutputBuffer& result() const { return m_buffer; }
+
 private:
-    // HTML entities contain at most four UTF-16 code units.
-    static const unsigned kMaxLength = 4;
+    enum EntityState {
+        Initial,
+        Numeric,
+        PossiblyHex,
+        Hex,
+        Decimal,
+        Named
+    };
 
-public:
-    DecodedHTMLEntity() : length(0) { }
+    void finalizeNumericEntity();
+    void finalizeNamedEntity();
 
-    bool isEmpty() const { return !length; }
-
-    void append(UChar c)
-    {
-        RELEASE_ASSERT(length < kMaxLength);
-        data[length++] = c;
-    }
-
-    void append(UChar32 c)
-    {
-        if (U_IS_BMP(c)) {
-            append(static_cast<UChar>(c));
-            return;
-        }
-        append(U16_LEAD(c));
-        append(U16_TRAIL(c));
-    }
-
-    unsigned length;
-    UChar data[kMaxLength];
+    EntityState m_state;
+    UChar32 m_result;
+    OutputBuffer m_buffer;
 };
 
-bool consumeHTMLEntity(SegmentedString&, DecodedHTMLEntity& decodedEntity, bool& notEnoughCharacters, UChar additionalAllowedCharacter = '\0');
-
-// Used by the XML parser.  Not suitable for use in HTML parsing.  Use consumeHTMLEntity instead.
-size_t decodeNamedEntityToUCharArray(const char*, UChar result[4]);
-
 }
 
 #endif