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 // © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
 /*
  ********************************************************************
  * COPYRIGHT:
  * Copyright (c) 1996-2015, International Business Machines Corporation and
  * others. All Rights Reserved.
  ********************************************************************
  */
 
 #ifndef NORMLZR_H
 #define NORMLZR_H
 
 #include "unicode/utypes.h"
 
 #if U_SHOW_CPLUSPLUS_API
 
 /**
  * \file 
  * \brief C++ API: Unicode Normalization
  */
  
 #if !UCONFIG_NO_NORMALIZATION
 
 #include "unicode/chariter.h"
 #include "unicode/normalizer2.h"
 #include "unicode/unistr.h"
 #include "unicode/unorm.h"
 #include "unicode/uobject.h"
 
 U_NAMESPACE_BEGIN
 /**
  * Old Unicode normalization API.
  *
  * This API has been replaced by the Normalizer2 class and is only available
  * for backward compatibility. This class simply delegates to the Normalizer2 class.
  * There is one exception: The new API does not provide a replacement for Normalizer::compare().
  *
  * The Normalizer class supports the standard normalization forms described in
  * <a href="http://www.unicode.org/unicode/reports/tr15/" target="unicode">
  * Unicode Standard Annex #15: Unicode Normalization Forms</a>.
  *
  * The Normalizer class consists of two parts:
  * - static functions that normalize strings or test if strings are normalized
  * - a Normalizer object is an iterator that takes any kind of text and
  *   provides iteration over its normalized form
  *
  * The Normalizer class is not suitable for subclassing.
  *
  * For basic information about normalization forms and details about the C API
  * please see the documentation in unorm.h.
  *
  * The iterator API with the Normalizer constructors and the non-static functions
  * use a CharacterIterator as input. It is possible to pass a string which
  * is then internally wrapped in a CharacterIterator.
  * The input text is not normalized all at once, but incrementally where needed
  * (providing efficient random access).
  * This allows to pass in a large text but spend only a small amount of time
  * normalizing a small part of that text.
  * However, if the entire text is normalized, then the iterator will be
  * slower than normalizing the entire text at once and iterating over the result.
  * A possible use of the Normalizer iterator is also to report an index into the
  * original text that is close to where the normalized characters come from.
  *
  * <em>Important:</em> The iterator API was cleaned up significantly for ICU 2.0.
  * The earlier implementation reported the getIndex() inconsistently,
  * and previous() could not be used after setIndex(), next(), first(), and current().
  *
  * Normalizer allows to start normalizing from anywhere in the input text by
  * calling setIndexOnly(), first(), or last().
  * Without calling any of these, the iterator will start at the beginning of the text.
  *
  * At any time, next() returns the next normalized code point (UChar32),
  * with post-increment semantics (like CharacterIterator::next32PostInc()).
  * previous() returns the previous normalized code point (UChar32),
  * with pre-decrement semantics (like CharacterIterator::previous32()).
  *
  * current() returns the current code point
  * (respectively the one at the newly set index) without moving
  * the getIndex(). Note that if the text at the current position
  * needs to be normalized, then these functions will do that.
  * (This is why current() is not const.)
  * It is more efficient to call setIndexOnly() instead, which does not
  * normalize.
  *
  * getIndex() always refers to the position in the input text where the normalized
  * code points are returned from. It does not always change with each returned
  * code point.
  * The code point that is returned from any of the functions
  * corresponds to text at or after getIndex(), according to the
  * function's iteration semantics (post-increment or pre-decrement).
  *
  * next() returns a code point from at or after the getIndex()
  * from before the next() call. After the next() call, the getIndex()
  * might have moved to where the next code point will be returned from
  * (from a next() or current() call).
  * This is semantically equivalent to array access with array[index++]
  * (post-increment semantics).
  *
  * previous() returns a code point from at or after the getIndex()
  * from after the previous() call.
  * This is semantically equivalent to array access with array[--index]
  * (pre-decrement semantics).
  *
  * Internally, the Normalizer iterator normalizes a small piece of text
  * starting at the getIndex() and ending at a following "safe" index.
  * The normalized results is stored in an internal string buffer, and
  * the code points are iterated from there.
  * With multiple iteration calls, this is repeated until the next piece
  * of text needs to be normalized, and the getIndex() needs to be moved.
  *
  * The following "safe" index, the internal buffer, and the secondary
  * iteration index into that buffer are not exposed on the API.
  * This also means that it is currently not practical to return to
  * a particular, arbitrary position in the text because one would need to
  * know, and be able to set, in addition to the getIndex(), at least also the
  * current index into the internal buffer.
  * It is currently only possible to observe when getIndex() changes
  * (with careful consideration of the iteration semantics),
  * at which time the internal index will be 0.
  * For example, if getIndex() is different after next() than before it,
  * then the internal index is 0 and one can return to this getIndex()
  * later with setIndexOnly().
  *
  * Note: While the setIndex() and getIndex() refer to indices in the
  * underlying Unicode input text, the next() and previous() methods
  * iterate through characters in the normalized output.
  * This means that there is not necessarily a one-to-one correspondence
  * between characters returned by next() and previous() and the indices
  * passed to and returned from setIndex() and getIndex().
  * It is for this reason that Normalizer does not implement the CharacterIterator interface.
  *
  * @author Laura Werner, Mark Davis, Markus Scherer
  * @stable ICU 2.0
  */
 class U_COMMON_API Normalizer : public UObject {
 public:
 #ifndef U_HIDE_DEPRECATED_API
   /**
    * If DONE is returned from an iteration function that returns a code point,
    * then there are no more normalization results available.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   enum {
       DONE=0xffff
   };
 
   // Constructors
 
   /**
    * Creates a new <code>Normalizer</code> object for iterating over the
    * normalized form of a given string.
    * <p>
    * @param str   The string to be normalized.  The normalization
    *              will start at the beginning of the string.
    *
    * @param mode  The normalization mode.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   Normalizer(const UnicodeString& str, UNormalizationMode mode);
 
   /**
    * Creates a new <code>Normalizer</code> object for iterating over the
    * normalized form of a given string.
    * <p>
    * @param str   The string to be normalized.  The normalization
    *              will start at the beginning of the string.
    *
    * @param length Length of the string, or -1 if NUL-terminated.
    * @param mode  The normalization mode.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   Normalizer(ConstChar16Ptr str, int32_t length, UNormalizationMode mode);
 
   /**
    * Creates a new <code>Normalizer</code> object for iterating over the
    * normalized form of the given text.
    * <p>
    * @param iter  The input text to be normalized.  The normalization
    *              will start at the beginning of the string.
    *
    * @param mode  The normalization mode.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   Normalizer(const CharacterIterator& iter, UNormalizationMode mode);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 #ifndef U_FORCE_HIDE_DEPRECATED_API
   /**
    * Copy constructor.
    * @param copy The object to be copied.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   Normalizer(const Normalizer& copy);
 
   /**
    * Destructor
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   virtual ~Normalizer();
 #endif  // U_FORCE_HIDE_DEPRECATED_API
 
   //-------------------------------------------------------------------------
   // Static utility methods
   //-------------------------------------------------------------------------
 
 #ifndef U_HIDE_DEPRECATED_API
   /**
    * Normalizes a <code>UnicodeString</code> according to the specified normalization mode.
    * This is a wrapper for unorm_normalize(), using UnicodeString's.
    *
    * The <code>options</code> parameter specifies which optional
    * <code>Normalizer</code> features are to be enabled for this operation.
    *
    * @param source    the input string to be normalized.
    * @param mode      the normalization mode
    * @param options   the optional features to be enabled (0 for no options)
    * @param result    The normalized string (on output).
    * @param status    The error code.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static void U_EXPORT2 normalize(const UnicodeString& source,
                         UNormalizationMode mode, int32_t options,
                         UnicodeString& result,
                         UErrorCode &status);
 
   /**
    * Compose a <code>UnicodeString</code>.
    * This is equivalent to normalize() with mode UNORM_NFC or UNORM_NFKC.
    * This is a wrapper for unorm_normalize(), using UnicodeString's.
    *
    * The <code>options</code> parameter specifies which optional
    * <code>Normalizer</code> features are to be enabled for this operation.
    *
    * @param source    the string to be composed.
    * @param compat    Perform compatibility decomposition before composition.
    *                  If this argument is <code>false</code>, only canonical
    *                  decomposition will be performed.
    * @param options   the optional features to be enabled (0 for no options)
    * @param result    The composed string (on output).
    * @param status    The error code.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static void U_EXPORT2 compose(const UnicodeString& source,
                       UBool compat, int32_t options,
                       UnicodeString& result,
                       UErrorCode &status);
 
   /**
    * Static method to decompose a <code>UnicodeString</code>.
    * This is equivalent to normalize() with mode UNORM_NFD or UNORM_NFKD.
    * This is a wrapper for unorm_normalize(), using UnicodeString's.
    *
    * The <code>options</code> parameter specifies which optional
    * <code>Normalizer</code> features are to be enabled for this operation.
    *
    * @param source    the string to be decomposed.
    * @param compat    Perform compatibility decomposition.
    *                  If this argument is <code>false</code>, only canonical
    *                  decomposition will be performed.
    * @param options   the optional features to be enabled (0 for no options)
    * @param result    The decomposed string (on output).
    * @param status    The error code.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static void U_EXPORT2 decompose(const UnicodeString& source,
                         UBool compat, int32_t options,
                         UnicodeString& result,
                         UErrorCode &status);
 
   /**
    * Performing quick check on a string, to quickly determine if the string is
    * in a particular normalization format.
    * This is a wrapper for unorm_quickCheck(), using a UnicodeString.
    *
    * Three types of result can be returned UNORM_YES, UNORM_NO or
    * UNORM_MAYBE. Result UNORM_YES indicates that the argument
    * string is in the desired normalized format, UNORM_NO determines that
    * argument string is not in the desired normalized format. A
    * UNORM_MAYBE result indicates that a more thorough check is required,
    * the user may have to put the string in its normalized form and compare the
    * results.
    * @param source       string for determining if it is in a normalized format
    * @param mode         normalization format
    * @param status A reference to a UErrorCode to receive any errors
    * @return UNORM_YES, UNORM_NO or UNORM_MAYBE
    *
    * @see isNormalized
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static inline UNormalizationCheckResult
   quickCheck(const UnicodeString &source, UNormalizationMode mode, UErrorCode &status);
 
   /**
    * Performing quick check on a string; same as the other version of quickCheck
    * but takes an extra options parameter like most normalization functions.
    *
    * @param source       string for determining if it is in a normalized format
    * @param mode         normalization format
    * @param options      the optional features to be enabled (0 for no options)
    * @param status A reference to a UErrorCode to receive any errors
    * @return UNORM_YES, UNORM_NO or UNORM_MAYBE
    *
    * @see isNormalized
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static UNormalizationCheckResult
   quickCheck(const UnicodeString &source, UNormalizationMode mode, int32_t options, UErrorCode &status);
 
   /**
    * Test if a string is in a given normalization form.
    * This is semantically equivalent to source.equals(normalize(source, mode)) .
    *
    * Unlike unorm_quickCheck(), this function returns a definitive result,
    * never a "maybe".
    * For NFD, NFKD, and FCD, both functions work exactly the same.
    * For NFC and NFKC where quickCheck may return "maybe", this function will
    * perform further tests to arrive at a true/false result.
    *
    * @param src        String that is to be tested if it is in a normalization format.
    * @param mode       Which normalization form to test for.
    * @param errorCode  ICU error code in/out parameter.
    *                   Must fulfill U_SUCCESS before the function call.
    * @return Boolean value indicating whether the source string is in the
    *         "mode" normalization form.
    *
    * @see quickCheck
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static inline UBool
   isNormalized(const UnicodeString &src, UNormalizationMode mode, UErrorCode &errorCode);
 
   /**
    * Test if a string is in a given normalization form; same as the other version of isNormalized
    * but takes an extra options parameter like most normalization functions.
    *
    * @param src        String that is to be tested if it is in a normalization format.
    * @param mode       Which normalization form to test for.
    * @param options      the optional features to be enabled (0 for no options)
    * @param errorCode  ICU error code in/out parameter.
    *                   Must fulfill U_SUCCESS before the function call.
    * @return Boolean value indicating whether the source string is in the
    *         "mode" normalization form.
    *
    * @see quickCheck
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static UBool
   isNormalized(const UnicodeString &src, UNormalizationMode mode, int32_t options, UErrorCode &errorCode);
 
   /**
    * Concatenate normalized strings, making sure that the result is normalized as well.
    *
    * If both the left and the right strings are in
    * the normalization form according to "mode/options",
    * then the result will be
    *
    * \code
    *     dest=normalize(left+right, mode, options)
    * \endcode
    *
    * For details see unorm_concatenate in unorm.h.
    *
    * @param left Left source string.
    * @param right Right source string.
    * @param result The output string.
    * @param mode The normalization mode.
    * @param options A bit set of normalization options.
    * @param errorCode ICU error code in/out parameter.
    *                   Must fulfill U_SUCCESS before the function call.
    * @return result
    *
    * @see unorm_concatenate
    * @see normalize
    * @see unorm_next
    * @see unorm_previous
    *
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static UnicodeString &
   U_EXPORT2 concatenate(const UnicodeString &left, const UnicodeString &right,
               UnicodeString &result,
               UNormalizationMode mode, int32_t options,
               UErrorCode &errorCode);
 #endif  /* U_HIDE_DEPRECATED_API */
 
   /**
    * Compare two strings for canonical equivalence.
    * Further options include case-insensitive comparison and
    * code point order (as opposed to code unit order).
    *
    * Canonical equivalence between two strings is defined as their normalized
    * forms (NFD or NFC) being identical.
    * This function compares strings incrementally instead of normalizing
    * (and optionally case-folding) both strings entirely,
    * improving performance significantly.
    *
    * Bulk normalization is only necessary if the strings do not fulfill the FCD
    * conditions. Only in this case, and only if the strings are relatively long,
    * is memory allocated temporarily.
    * For FCD strings and short non-FCD strings there is no memory allocation.
    *
    * Semantically, this is equivalent to
    *   strcmp[CodePointOrder](NFD(foldCase(s1)), NFD(foldCase(s2)))
    * where code point order and foldCase are all optional.
    *
    * UAX 21 2.5 Caseless Matching specifies that for a canonical caseless match
    * the case folding must be performed first, then the normalization.
    *
    * @param s1 First source string.
    * @param s2 Second source string.
    *
    * @param options A bit set of options:
    *   - U_FOLD_CASE_DEFAULT or 0 is used for default options:
    *     Case-sensitive comparison in code unit order, and the input strings
    *     are quick-checked for FCD.
    *
    *   - UNORM_INPUT_IS_FCD
    *     Set if the caller knows that both s1 and s2 fulfill the FCD conditions.
    *     If not set, the function will quickCheck for FCD
    *     and normalize if necessary.
    *
    *   - U_COMPARE_CODE_POINT_ORDER
    *     Set to choose code point order instead of code unit order
    *     (see u_strCompare for details).
    *
    *   - U_COMPARE_IGNORE_CASE
    *     Set to compare strings case-insensitively using case folding,
    *     instead of case-sensitively.
    *     If set, then the following case folding options are used.
    *
    *   - Options as used with case-insensitive comparisons, currently:
    *
    *   - U_FOLD_CASE_EXCLUDE_SPECIAL_I
    *    (see u_strCaseCompare for details)
    *
    *   - regular normalization options shifted left by UNORM_COMPARE_NORM_OPTIONS_SHIFT
    *
    * @param errorCode ICU error code in/out parameter.
    *                  Must fulfill U_SUCCESS before the function call.
    * @return <0 or 0 or >0 as usual for string comparisons
    *
    * @see unorm_compare
    * @see normalize
    * @see UNORM_FCD
    * @see u_strCompare
    * @see u_strCaseCompare
    *
    * @stable ICU 2.2
    */
   static inline int32_t
   compare(const UnicodeString &s1, const UnicodeString &s2,
           uint32_t options,
           UErrorCode &errorCode);
 
 #ifndef U_HIDE_DEPRECATED_API
   //-------------------------------------------------------------------------
   // Iteration API
   //-------------------------------------------------------------------------
 
   /**
    * Return the current character in the normalized text.
    * current() may need to normalize some text at getIndex().
    * The getIndex() is not changed.
    *
    * @return the current normalized code point
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UChar32              current(void);
 
   /**
    * Return the first character in the normalized text.
    * This is equivalent to setIndexOnly(startIndex()) followed by next().
    * (Post-increment semantics.)
    *
    * @return the first normalized code point
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UChar32              first(void);
 
   /**
    * Return the last character in the normalized text.
    * This is equivalent to setIndexOnly(endIndex()) followed by previous().
    * (Pre-decrement semantics.)
    *
    * @return the last normalized code point
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UChar32              last(void);
 
   /**
    * Return the next character in the normalized text.
    * (Post-increment semantics.)
    * If the end of the text has already been reached, DONE is returned.
    * The DONE value could be confused with a U+FFFF non-character code point
    * in the text. If this is possible, you can test getIndex()<endIndex()
    * before calling next(), or (getIndex()<endIndex() || last()!=DONE)
    * after calling next(). (Calling last() will change the iterator state!)
    *
    * The C API unorm_next() is more efficient and does not have this ambiguity.
    *
    * @return the next normalized code point
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UChar32              next(void);
 
   /**
    * Return the previous character in the normalized text and decrement.
    * (Pre-decrement semantics.)
    * If the beginning of the text has already been reached, DONE is returned.
    * The DONE value could be confused with a U+FFFF non-character code point
    * in the text. If this is possible, you can test
    * (getIndex()>startIndex() || first()!=DONE). (Calling first() will change
    * the iterator state!)
    *
    * The C API unorm_previous() is more efficient and does not have this ambiguity.
    *
    * @return the previous normalized code point
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UChar32              previous(void);
 
   /**
    * Set the iteration position in the input text that is being normalized,
    * without any immediate normalization.
    * After setIndexOnly(), getIndex() will return the same index that is
    * specified here.
    *
    * @param index the desired index in the input text.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void                 setIndexOnly(int32_t index);
 
   /**
    * Reset the index to the beginning of the text.
    * This is equivalent to setIndexOnly(startIndex)).
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void                reset(void);
 
   /**
    * Retrieve the current iteration position in the input text that is
    * being normalized.
    *
    * A following call to next() will return a normalized code point from
    * the input text at or after this index.
    *
    * After a call to previous(), getIndex() will point at or before the
    * position in the input text where the normalized code point
    * was returned from with previous().
    *
    * @return the current index in the input text
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   int32_t            getIndex(void) const;
 
   /**
    * Retrieve the index of the start of the input text. This is the begin index
    * of the <code>CharacterIterator</code> or the start (i.e. index 0) of the string
    * over which this <code>Normalizer</code> is iterating.
    *
    * @return the smallest index in the input text where the Normalizer operates
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   int32_t            startIndex(void) const;
 
   /**
    * Retrieve the index of the end of the input text. This is the end index
    * of the <code>CharacterIterator</code> or the length of the string
    * over which this <code>Normalizer</code> is iterating.
    * This end index is exclusive, i.e., the Normalizer operates only on characters
    * before this index.
    *
    * @return the first index in the input text where the Normalizer does not operate
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   int32_t            endIndex(void) const;
 
   /**
    * Returns true when both iterators refer to the same character in the same
    * input text.
    *
    * @param that a Normalizer object to compare this one to
    * @return comparison result
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   bool         operator==(const Normalizer& that) const;
 
   /**
    * Returns false when both iterators refer to the same character in the same
    * input text.
    *
    * @param that a Normalizer object to compare this one to
    * @return comparison result
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   inline bool         operator!=(const Normalizer& that) const;
 
   /**
    * Returns a pointer to a new Normalizer that is a clone of this one.
    * The caller is responsible for deleting the new clone.
    * @return a pointer to a new Normalizer
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   Normalizer*        clone() const;
 
   /**
    * Generates a hash code for this iterator.
    *
    * @return the hash code
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   int32_t                hashCode(void) const;
 
   //-------------------------------------------------------------------------
   // Property access methods
   //-------------------------------------------------------------------------
 
   /**
    * Set the normalization mode for this object.
    * <p>
    * <b>Note:</b>If the normalization mode is changed while iterating
    * over a string, calls to {@link #next() } and {@link #previous() } may
    * return previously buffers characters in the old normalization mode
    * until the iteration is able to re-sync at the next base character.
    * It is safest to call {@link #setIndexOnly }, {@link #reset() },
    * {@link #setText }, {@link #first() },
    * {@link #last() }, etc. after calling <code>setMode</code>.
    * <p>
    * @param newMode the new mode for this <code>Normalizer</code>.
    * @see #getUMode
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void setMode(UNormalizationMode newMode);
 
   /**
    * Return the normalization mode for this object.
    *
    * This is an unusual name because there used to be a getMode() that
    * returned a different type.
    *
    * @return the mode for this <code>Normalizer</code>
    * @see #setMode
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UNormalizationMode getUMode(void) const;
 
   /**
    * Set options that affect this <code>Normalizer</code>'s operation.
    * Options do not change the basic composition or decomposition operation
    * that is being performed, but they control whether
    * certain optional portions of the operation are done.
    * Currently the only available option is obsolete.
    *
    * It is possible to specify multiple options that are all turned on or off.
    *
    * @param   option  the option(s) whose value is/are to be set.
    * @param   value   the new setting for the option.  Use <code>true</code> to
    *                  turn the option(s) on and <code>false</code> to turn it/them off.
    *
    * @see #getOption
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void setOption(int32_t option,
          UBool value);
 
   /**
    * Determine whether an option is turned on or off.
    * If multiple options are specified, then the result is true if any
    * of them are set.
    * <p>
    * @param option the option(s) that are to be checked
    * @return true if any of the option(s) are set
    * @see #setOption
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   UBool getOption(int32_t option) const;
 
   /**
    * Set the input text over which this <code>Normalizer</code> will iterate.
    * The iteration position is set to the beginning.
    *
    * @param newText a string that replaces the current input text
    * @param status a UErrorCode
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void setText(const UnicodeString& newText,
            UErrorCode &status);
 
   /**
    * Set the input text over which this <code>Normalizer</code> will iterate.
    * The iteration position is set to the beginning.
    *
    * @param newText a CharacterIterator object that replaces the current input text
    * @param status a UErrorCode
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void setText(const CharacterIterator& newText,
            UErrorCode &status);
 
   /**
    * Set the input text over which this <code>Normalizer</code> will iterate.
    * The iteration position is set to the beginning.
    *
    * @param newText a string that replaces the current input text
    * @param length the length of the string, or -1 if NUL-terminated
    * @param status a UErrorCode
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void setText(ConstChar16Ptr newText,
                     int32_t length,
             UErrorCode &status);
   /**
    * Copies the input text into the UnicodeString argument.
    *
    * @param result Receives a copy of the text under iteration.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   void            getText(UnicodeString&  result);
 
   /**
    * ICU "poor man's RTTI", returns a UClassID for this class.
    * @returns a UClassID for this class.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   static UClassID U_EXPORT2 getStaticClassID();
 #endif  /* U_HIDE_DEPRECATED_API */
 
 #ifndef U_FORCE_HIDE_DEPRECATED_API
   /**
    * ICU "poor man's RTTI", returns a UClassID for the actual class.
    * @return a UClassID for the actual class.
    * @deprecated ICU 56 Use Normalizer2 instead.
    */
   virtual UClassID getDynamicClassID() const override;
 #endif  // U_FORCE_HIDE_DEPRECATED_API
 
 private:
   //-------------------------------------------------------------------------
   // Private functions
   //-------------------------------------------------------------------------
 
   Normalizer() = delete; // default constructor not implemented
   Normalizer &operator=(const Normalizer &that) = delete; // assignment operator not implemented
 
   // Private utility methods for iteration
   // For documentation, see the source code
   UBool nextNormalize();
   UBool previousNormalize();
 
   void    init();
   void    clearBuffer(void);
 
   //-------------------------------------------------------------------------
   // Private data
   //-------------------------------------------------------------------------
 
   FilteredNormalizer2*fFilteredNorm2;  // owned if not nullptr
   const Normalizer2  *fNorm2;  // not owned; may be equal to fFilteredNorm2
   UNormalizationMode  fUMode;  // deprecated
   int32_t             fOptions;
 
   // The input text and our position in it
   CharacterIterator  *text;
 
   // The normalization buffer is the result of normalization
   // of the source in [currentIndex..nextIndex[ .
   int32_t         currentIndex, nextIndex;
 
   // A buffer for holding intermediate results
   UnicodeString       buffer;
   int32_t         bufferPos;
 };
 
 //-------------------------------------------------------------------------
 // Inline implementations
 //-------------------------------------------------------------------------
 
 #ifndef U_HIDE_DEPRECATED_API
 inline bool
 Normalizer::operator!= (const Normalizer& other) const
 { return ! operator==(other); }
 
 inline UNormalizationCheckResult
 Normalizer::quickCheck(const UnicodeString& source,
                        UNormalizationMode mode,
                        UErrorCode &status) {
     return quickCheck(source, mode, 0, status);
 }
 
 inline UBool
 Normalizer::isNormalized(const UnicodeString& source,
                          UNormalizationMode mode,
                          UErrorCode &status) {
     return isNormalized(source, mode, 0, status);
 }
 #endif  /* U_HIDE_DEPRECATED_API */
 
 inline int32_t
 Normalizer::compare(const UnicodeString &s1, const UnicodeString &s2,
                     uint32_t options,
                     UErrorCode &errorCode) {
   // all argument checking is done in unorm_compare
   return unorm_compare(toUCharPtr(s1.getBuffer()), s1.length(),
                        toUCharPtr(s2.getBuffer()), s2.length(),
                        options,
                        &errorCode);
 }
 
 U_NAMESPACE_END
 
 #endif /* #if !UCONFIG_NO_NORMALIZATION */
 
 #endif // NORMLZR_H
 
 #endif /* U_SHOW_CPLUSPLUS_API */

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