diff --git a/include/utils/AndroidUnicode.h b/include/utils/AndroidUnicode.h
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+++ b/include/utils/AndroidUnicode.h
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+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+
+#ifndef ANDROID_UNICODE_H
+#define ANDROID_UNICODE_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#define REPLACEMENT_CHAR (0xFFFD)
+
+// this part of code is copied from umachine.h under ICU
+/**
+ * Define UChar32 as a type for single Unicode code points.
+ * UChar32 is a signed 32-bit integer (same as int32_t).
+ *
+ * The Unicode code point range is 0..0x10ffff.
+ * All other values (negative or >=0x110000) are illegal as Unicode code points.
+ * They may be used as sentinel values to indicate "done", "error"
+ * or similar non-code point conditions.
+ *
+ * @stable ICU 2.4
+ */
+typedef int32_t UChar32;
+
+namespace android {
+
+    class Encoding;
+    /**
+     * \class Unicode
+     *
+     * Helper class for getting properties of Unicode characters. Characters
+     * can have one of the types listed in CharType and each character can have the
+     * directionality of Direction.
+     */
+    class Unicode
+    {
+    public:
+        /**
+         * Directions specified in the Unicode standard. These directions map directly
+         * to java.lang.Character.
+         */
+        enum Direction {
+            DIRECTIONALITY_UNDEFINED = -1,
+            DIRECTIONALITY_LEFT_TO_RIGHT,
+            DIRECTIONALITY_RIGHT_TO_LEFT,
+            DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC,
+            DIRECTIONALITY_EUROPEAN_NUMBER,
+            DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR,
+            DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR,
+            DIRECTIONALITY_ARABIC_NUMBER,
+            DIRECTIONALITY_COMMON_NUMBER_SEPARATOR,
+            DIRECTIONALITY_NONSPACING_MARK,
+            DIRECTIONALITY_BOUNDARY_NEUTRAL,
+            DIRECTIONALITY_PARAGRAPH_SEPARATOR,
+            DIRECTIONALITY_SEGMENT_SEPARATOR,
+            DIRECTIONALITY_WHITESPACE,
+            DIRECTIONALITY_OTHER_NEUTRALS,
+            DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING,
+            DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE,
+            DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING,
+            DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE,
+            DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
+        };
+
+        /**
+         * Character types as specified in the Unicode standard. These map directly to
+         * java.lang.Character.
+         */
+        enum CharType {
+            CHARTYPE_UNASSIGNED = 0,
+            CHARTYPE_UPPERCASE_LETTER,
+            CHARTYPE_LOWERCASE_LETTER,
+            CHARTYPE_TITLECASE_LETTER,
+            CHARTYPE_MODIFIER_LETTER,
+            CHARTYPE_OTHER_LETTER,
+            CHARTYPE_NON_SPACING_MARK,
+            CHARTYPE_ENCLOSING_MARK,
+            CHARTYPE_COMBINING_SPACING_MARK,
+            CHARTYPE_DECIMAL_DIGIT_NUMBER,
+            CHARTYPE_LETTER_NUMBER,
+            CHARTYPE_OTHER_NUMBER,
+            CHARTYPE_SPACE_SEPARATOR,
+            CHARTYPE_LINE_SEPARATOR,
+            CHARTYPE_PARAGRAPH_SEPARATOR,
+            CHARTYPE_CONTROL,
+            CHARTYPE_FORMAT,
+            CHARTYPE_MISSING_VALUE_FOR_JAVA,    /* This is the mysterious missing 17 value from the java constants */
+            CHARTYPE_PRIVATE_USE,
+            CHARTYPE_SURROGATE,
+            CHARTYPE_DASH_PUNCTUATION,
+            CHARTYPE_START_PUNCTUATION,
+            CHARTYPE_END_PUNCTUATION,
+            CHARTYPE_CONNECTOR_PUNCTUATION,
+            CHARTYPE_OTHER_PUNCTUATION,
+            CHARTYPE_MATH_SYMBOL,
+            CHARTYPE_CURRENCY_SYMBOL,
+            CHARTYPE_MODIFIER_SYMBOL,
+            CHARTYPE_OTHER_SYMBOL,
+            CHARTYPE_INITIAL_QUOTE_PUNCTUATION,
+            CHARTYPE_FINAL_QUOTE_PUNCTUATION
+        };
+
+        /**
+         * Decomposition types as described by the unicode standard. These values map to
+         * the same values in uchar.h in ICU.
+         */
+        enum DecompositionType {
+            DECOMPOSITION_NONE = 0,
+            DECOMPOSITION_CANONICAL,
+            DECOMPOSITION_COMPAT,
+            DECOMPOSITION_CIRCLE,
+            DECOMPOSITION_FINAL,
+            DECOMPOSITION_FONT,
+            DECOMPOSITION_FRACTION,
+            DECOMPOSITION_INITIAL,
+            DECOMPOSITION_ISOLATED,
+            DECOMPOSITION_MEDIAL,
+            DECOMPOSITION_NARROW,
+            DECOMPOSITION_NOBREAK,
+            DECOMPOSITION_SMALL,
+            DECOMPOSITION_SQUARE,
+            DECOMPOSITION_SUB,
+            DECOMPOSITION_SUPER,
+            DECOMPOSITION_VERTICAL,
+            DECOMPOSITION_WIDE
+        };
+
+        /**
+         * Returns the packed data for java calls
+         * @param c The unicode character.
+         * @return The packed data for the character.
+         *
+         * Copied from java.lang.Character implementation:
+         * 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
+         * F E D C B A 9 8 7 6 5 4 3 2 1 0 F E D C B A 9 8 7 6 5 4 3 2 1 0
+         * 
+         *                              31 types                 ---------
+         *                   18 directionalities       ---------
+         *                   2 mirroreds             -
+         *                               -----------      56  toupper diffs
+         *                   -----------                  48  tolower diffs
+         *               ---                              4 totitlecase diffs
+         * -------------                                 84 numeric values
+         *     ---------                                 24 mirror char diffs
+         */
+        static uint32_t getPackedData(UChar32 c);
+        
+        /**
+         * Get the Character type.
+         * @param c The unicode character.
+         * @return The character's type or CHARTYPE_UNASSIGNED if the character is invalid
+         *         or has an unassigned class.
+         */
+        static CharType getType(UChar32 c);    
+
+        /**
+         * Get the Character's decomposition type.
+         * @param c The unicode character.
+         * @return The character's decomposition type or DECOMPOSITION_NONE is there 
+         *         is no decomposition.
+         */
+        static DecompositionType getDecompositionType(UChar32 c);
+        
+        /**
+         * Returns the digit value of a character or -1 if the character
+         * is not within the specified radix.
+         *
+         * The digit value is computed for integer characters and letters
+         * within the given radix. This function does not handle Roman Numerals,
+         * fractions, or any other characters that may represent numbers.
+         * 
+         * @param c The unicode character
+         * @param radix The intended radix.
+         * @return The digit value or -1 if there is no digit value or if the value is outside the radix.
+         */
+        static int getDigitValue(UChar32 c, int radix = 10);
+
+        /**
+         * Return the numeric value of a character
+         *
+         * @param c The unicode character.
+         * @return The numeric value of the character. -1 if the character has no numeric value, 
+         *         -2 if the character has a numeric value that is not representable by an integer.
+         */
+        static int getNumericValue(UChar32 c);
+
+        /**
+         * Convert the character to lowercase
+         * @param c The unicode character.
+         * @return The lowercase character equivalent of c. If c does not have a lowercase equivalent,
+         *         the original character is returned.
+         */
+        static UChar32 toLower(UChar32 c);
+            
+        /**
+         * Convert the character to uppercase
+         * @param c The unicode character.
+         * @return The uppercase character equivalent of c. If c does not have an uppercase equivalent,
+         *         the original character is returned.
+         */
+        static UChar32 toUpper(UChar32 c);
+    
+        /**
+         * Get the directionality of the character.
+         * @param c The unicode character.
+         * @return The direction of the character or DIRECTIONALITY_UNDEFINED.
+         */
+        static Direction getDirectionality(UChar32 c);
+            
+        /**
+         * Check if the character is a mirrored character. This means that the character
+         * has an equivalent character that is the mirror image of itself.
+         * @param c The unicode character.
+         * @return True iff c has a mirror equivalent.
+         */
+        static bool isMirrored(UChar32 c);
+         
+        /**
+         * Return the mirror of the given character.
+         * @param c The unicode character.
+         * @return The mirror equivalent of c. If c does not have a mirror equivalent,
+         *         the original character is returned.
+         * @see isMirrored
+         */
+        static UChar32 toMirror(UChar32 c);
+        
+        /**
+         * Convert the character to title case.
+         * @param c The unicode character.
+         * @return The titlecase equivalent of c. If c does not have a titlecase equivalent,
+         *         the original character is returned.
+         */
+        static UChar32 toTitle(UChar32 c);
+
+   };
+
+}
+
+#endif