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Edit File : caniter.h \| Size : 7.37 KB
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * Copyright (C) 1996-2014, International Business Machines Corporation and * others. All Rights Reserved. ******************************************************************************* / #ifndef CANITER_H #define CANITER_H #include "unicode/utypes.h" #if !UCONFIG_NO_NORMALIZATION #include "unicode/uobject.h" #include "unicode/unistr.h" /* * \file * \brief C++ API: Canonical Iterator / /* Should permutation skip characters with combining class zero * Should be either TRUE or FALSE. This is a compile time option * @stable ICU 2.4 / #ifndef CANITER_SKIP_ZEROES #define CANITER_SKIP_ZEROES TRUE #endif U_NAMESPACE_BEGIN class Hashtable; class Normalizer2; class Normalizer2Impl; /* * This class allows one to iterate through all the strings that are canonically equivalent to a given * string. For example, here are some sample results: Results for: {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 1: \\u0041\\u030A\\u0064\\u0307\\u0327 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 2: \\u0041\\u030A\\u0064\\u0327\\u0307 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 3: \\u0041\\u030A\\u1E0B\\u0327 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 4: \\u0041\\u030A\\u1E11\\u0307 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} 5: \\u00C5\\u0064\\u0307\\u0327 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 6: \\u00C5\\u0064\\u0327\\u0307 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 7: \\u00C5\\u1E0B\\u0327 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 8: \\u00C5\\u1E11\\u0307 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} 9: \\u212B\\u0064\\u0307\\u0327 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 10: \\u212B\\u0064\\u0327\\u0307 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 11: \\u212B\\u1E0B\\u0327 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 12: \\u212B\\u1E11\\u0307 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} <br>Note: the code is intended for use with small strings, and is not suitable for larger ones, since it has not been optimized for that situation. * Note, CanonicalIterator is not intended to be subclassed. * @author M. Davis * @author C++ port by V. Weinstein * @stable ICU 2.4 / class U_COMMON_API CanonicalIterator U_FINAL : public UObject { public: /* * Construct a CanonicalIterator object * @param source string to get results for * @param status Fill-in parameter which receives the status of this operation. * @stable ICU 2.4 / CanonicalIterator(const UnicodeString &source, UErrorCode &status); /* Destructor * Cleans pieces * @stable ICU 2.4 / virtual ~CanonicalIterator(); /* * Gets the NFD form of the current source we are iterating over. * @return gets the source: NOTE: it is the NFD form of source * @stable ICU 2.4 / UnicodeString getSource(); /* * Resets the iterator so that one can start again from the beginning. * @stable ICU 2.4 / void reset(); /* * Get the next canonically equivalent string. * <br><b>Warning: The strings are not guaranteed to be in any particular order.</b> * @return the next string that is canonically equivalent. A bogus string is returned when * the iteration is done. * @stable ICU 2.4 / UnicodeString next(); /* * Set a new source for this iterator. Allows object reuse. * @param newSource the source string to iterate against. This allows the same iterator to be used * while changing the source string, saving object creation. * @param status Fill-in parameter which receives the status of this operation. * @stable ICU 2.4 / void setSource(const UnicodeString &newSource, UErrorCode &status); #ifndef U_HIDE_INTERNAL_API /* * Dumb recursive implementation of permutation. * TODO: optimize * @param source the string to find permutations for * @param skipZeros determine if skip zeros * @param result the results in a set. * @param status Fill-in parameter which receives the status of this operation. * @internal / static void U_EXPORT2 permute(UnicodeString &source, UBool skipZeros, Hashtable result, UErrorCode &status); #endif /* U_HIDE_INTERNAL_API / /* * ICU "poor man's RTTI", returns a UClassID for this class. * * @stable ICU 2.2 / static UClassID U_EXPORT2 getStaticClassID(); /* * ICU "poor man's RTTI", returns a UClassID for the actual class. * * @stable ICU 2.2 / virtual UClassID getDynamicClassID() const; private: // ===================== PRIVATES ============================== // private default constructor CanonicalIterator(); /* * Copy constructor. Private for now. * @internal (private) / CanonicalIterator(const CanonicalIterator& other); /* * Assignment operator. Private for now. * @internal (private) / CanonicalIterator& operator=(const CanonicalIterator& other); // fields UnicodeString source; UBool done; // 2 dimensional array holds the pieces of the string with // their different canonically equivalent representations UnicodeString pieces; int32_t pieces_length; int32_t pieces_lengths; // current is used in iterating to combine pieces int32_t current; int32_t current_length; // transient fields UnicodeString buffer; const Normalizer2 &nfd; const Normalizer2Impl &nfcImpl; // we have a segment, in NFD. Find all the strings that are canonically equivalent to it. UnicodeString getEquivalents(const UnicodeString &segment, int32_t &result_len, UErrorCode &status); //private String[] getEquivalents(String segment) //Set getEquivalents2(String segment); Hashtable getEquivalents2(Hashtable fillinResult, const char16_t segment, int32_t segLen, UErrorCode &status); //Hashtable getEquivalents2(const UnicodeString &segment, int32_t segLen, UErrorCode &status); /** * See if the decomposition of cp2 is at segment starting at segmentPos * (with canonical rearrangment!) * If so, take the remainder, and return the equivalents / //Set extract(int comp, String segment, int segmentPos, StringBuffer buffer); Hashtable extract(Hashtable fillinResult, UChar32 comp, const char16_t segment, int32_t segLen, int32_t segmentPos, UErrorCode &status); //Hashtable extract(UChar32 comp, const UnicodeString &segment, int32_t segLen, int32_t segmentPos, UErrorCode &status); void cleanPieces(); }; U_NAMESPACE_END #endif / #if !UCONFIG_NO_NORMALIZATION */ #endif Back

Edit File : caniter.h | Size : 7.37 KB

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
 *******************************************************************************
 * Copyright (C) 1996-2014, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 */

#ifndef CANITER_H
#define CANITER_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_NORMALIZATION

#include "unicode/uobject.h"
#include "unicode/unistr.h"

/**
 * \file
 * \brief C++ API: Canonical Iterator
 */
 
/** Should permutation skip characters with combining class zero
 *  Should be either TRUE or FALSE. This is a compile time option
 *  @stable ICU 2.4
 */
#ifndef CANITER_SKIP_ZEROES
#define CANITER_SKIP_ZEROES TRUE
#endif

U_NAMESPACE_BEGIN

class Hashtable;
class Normalizer2;
class Normalizer2Impl;

/**
 * This class allows one to iterate through all the strings that are canonically equivalent to a given
 * string. For example, here are some sample results:
Results for: {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA}
1: \\u0041\\u030A\\u0064\\u0307\\u0327
 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA}
2: \\u0041\\u030A\\u0064\\u0327\\u0307
 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE}
3: \\u0041\\u030A\\u1E0B\\u0327
 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA}
4: \\u0041\\u030A\\u1E11\\u0307
 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE}
5: \\u00C5\\u0064\\u0307\\u0327
 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA}
6: \\u00C5\\u0064\\u0327\\u0307
 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE}
7: \\u00C5\\u1E0B\\u0327
 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA}
8: \\u00C5\\u1E11\\u0307
 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE}
9: \\u212B\\u0064\\u0307\\u0327
 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA}
10: \\u212B\\u0064\\u0327\\u0307
 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE}
11: \\u212B\\u1E0B\\u0327
 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA}
12: \\u212B\\u1E11\\u0307
 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE}
 *<br>Note: the code is intended for use with small strings, and is not suitable for larger ones,
 * since it has not been optimized for that situation.
 * Note, CanonicalIterator is not intended to be subclassed.
 * @author M. Davis
 * @author C++ port by V. Weinstein
 * @stable ICU 2.4
 */
class U_COMMON_API CanonicalIterator U_FINAL : public UObject {
public:
    /**
     * Construct a CanonicalIterator object
     * @param source    string to get results for
     * @param status    Fill-in parameter which receives the status of this operation.
     * @stable ICU 2.4
     */
    CanonicalIterator(const UnicodeString &source, UErrorCode &status);

/** Destructor
     *  Cleans pieces
     * @stable ICU 2.4
     */
    virtual ~CanonicalIterator();

/**
     * Gets the NFD form of the current source we are iterating over.
     * @return gets the source: NOTE: it is the NFD form of source
     * @stable ICU 2.4
     */
    UnicodeString getSource();

/**
     * Resets the iterator so that one can start again from the beginning.
     * @stable ICU 2.4
     */
    void reset();

/**
     * Get the next canonically equivalent string.
     * <br><b>Warning: The strings are not guaranteed to be in any particular order.</b>
     * @return the next string that is canonically equivalent. A bogus string is returned when
     * the iteration is done.
     * @stable ICU 2.4
     */
    UnicodeString next();

/**
     * Set a new source for this iterator. Allows object reuse.
     * @param newSource     the source string to iterate against. This allows the same iterator to be used
     *                     while changing the source string, saving object creation.
     * @param status        Fill-in parameter which receives the status of this operation.
     * @stable ICU 2.4
     */
    void setSource(const UnicodeString &newSource, UErrorCode &status);

#ifndef U_HIDE_INTERNAL_API
    /**
     * Dumb recursive implementation of permutation.
     * TODO: optimize
     * @param source     the string to find permutations for
     * @param skipZeros  determine if skip zeros
     * @param result     the results in a set.
     * @param status       Fill-in parameter which receives the status of this operation.
     * @internal
     */
    static void U_EXPORT2 permute(UnicodeString &source, UBool skipZeros, Hashtable *result, UErrorCode &status);
#endif  /* U_HIDE_INTERNAL_API */

/**
     * ICU "poor man's RTTI", returns a UClassID for this class.
     *
     * @stable ICU 2.2
     */
    static UClassID U_EXPORT2 getStaticClassID();

/**
     * ICU "poor man's RTTI", returns a UClassID for the actual class.
     *
     * @stable ICU 2.2
     */
    virtual UClassID getDynamicClassID() const;

private:
    // ===================== PRIVATES ==============================
    // private default constructor
    CanonicalIterator();

/**
     * Copy constructor. Private for now.
     * @internal (private)
     */
    CanonicalIterator(const CanonicalIterator& other);

/**
     * Assignment operator. Private for now.
     * @internal (private)
     */
    CanonicalIterator& operator=(const CanonicalIterator& other);

// fields
    UnicodeString source;
    UBool done;

// 2 dimensional array holds the pieces of the string with
    // their different canonically equivalent representations
    UnicodeString **pieces;
    int32_t pieces_length;
    int32_t *pieces_lengths;

// current is used in iterating to combine pieces
    int32_t *current;
    int32_t current_length;

// transient fields
    UnicodeString buffer;

const Normalizer2 &nfd;
    const Normalizer2Impl &nfcImpl;

// we have a segment, in NFD. Find all the strings that are canonically equivalent to it.
    UnicodeString *getEquivalents(const UnicodeString &segment, int32_t &result_len, UErrorCode &status); //private String[] getEquivalents(String segment)

//Set getEquivalents2(String segment);
    Hashtable *getEquivalents2(Hashtable *fillinResult, const char16_t *segment, int32_t segLen, UErrorCode &status);
    //Hashtable *getEquivalents2(const UnicodeString &segment, int32_t segLen, UErrorCode &status);

/**
     * See if the decomposition of cp2 is at segment starting at segmentPos
     * (with canonical rearrangment!)
     * If so, take the remainder, and return the equivalents
     */
    //Set extract(int comp, String segment, int segmentPos, StringBuffer buffer);
    Hashtable *extract(Hashtable *fillinResult, UChar32 comp, const char16_t *segment, int32_t segLen, int32_t segmentPos, UErrorCode &status);
    //Hashtable *extract(UChar32 comp, const UnicodeString &segment, int32_t segLen, int32_t segmentPos, UErrorCode &status);

void cleanPieces();

};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_NORMALIZATION */

#endif

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