| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2009-2013, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: normalizer2.h |
| * encoding: UTF-8 |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 2009nov22 |
| * created by: Markus W. Scherer |
| */ |
| |
| #ifndef __NORMALIZER2_H__ |
| #define __NORMALIZER2_H__ |
| |
| /** |
| * \file |
| * \brief C++ API: New API for Unicode Normalization. |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_NORMALIZATION |
| |
| #include "unicode/stringpiece.h" |
| #include "unicode/uniset.h" |
| #include "unicode/unistr.h" |
| #include "unicode/unorm2.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| class ByteSink; |
| |
| /** |
| * Unicode normalization functionality for standard Unicode normalization or |
| * for using custom mapping tables. |
| * All instances of this class are unmodifiable/immutable. |
| * Instances returned by getInstance() are singletons that must not be deleted by the caller. |
| * The Normalizer2 class is not intended for public subclassing. |
| * |
| * The primary functions are to produce a normalized string and to detect whether |
| * a string is already normalized. |
| * The most commonly used normalization forms are those defined in |
| * http://www.unicode.org/unicode/reports/tr15/ |
| * However, this API supports additional normalization forms for specialized purposes. |
| * For example, NFKC_Casefold is provided via getInstance("nfkc_cf", COMPOSE) |
| * and can be used in implementations of UTS #46. |
| * |
| * Not only are the standard compose and decompose modes supplied, |
| * but additional modes are provided as documented in the Mode enum. |
| * |
| * Some of the functions in this class identify normalization boundaries. |
| * At a normalization boundary, the portions of the string |
| * before it and starting from it do not interact and can be handled independently. |
| * |
| * The spanQuickCheckYes() stops at a normalization boundary. |
| * When the goal is a normalized string, then the text before the boundary |
| * can be copied, and the remainder can be processed with normalizeSecondAndAppend(). |
| * |
| * The hasBoundaryBefore(), hasBoundaryAfter() and isInert() functions test whether |
| * a character is guaranteed to be at a normalization boundary, |
| * regardless of context. |
| * This is used for moving from one normalization boundary to the next |
| * or preceding boundary, and for performing iterative normalization. |
| * |
| * Iterative normalization is useful when only a small portion of a |
| * longer string needs to be processed. |
| * For example, in ICU, iterative normalization is used by the NormalizationTransliterator |
| * (to avoid replacing already-normalized text) and ucol_nextSortKeyPart() |
| * (to process only the substring for which sort key bytes are computed). |
| * |
| * The set of normalization boundaries returned by these functions may not be |
| * complete: There may be more boundaries that could be returned. |
| * Different functions may return different boundaries. |
| * @stable ICU 4.4 |
| */ |
| class U_COMMON_API Normalizer2 : public UObject { |
| public: |
| /** |
| * Destructor. |
| * @stable ICU 4.4 |
| */ |
| ~Normalizer2(); |
| |
| /** |
| * Returns a Normalizer2 instance for Unicode NFC normalization. |
| * Same as getInstance(NULL, "nfc", UNORM2_COMPOSE, errorCode). |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 49 |
| */ |
| static const Normalizer2 * |
| getNFCInstance(UErrorCode &errorCode); |
| |
| /** |
| * Returns a Normalizer2 instance for Unicode NFD normalization. |
| * Same as getInstance(NULL, "nfc", UNORM2_DECOMPOSE, errorCode). |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 49 |
| */ |
| static const Normalizer2 * |
| getNFDInstance(UErrorCode &errorCode); |
| |
| /** |
| * Returns a Normalizer2 instance for Unicode NFKC normalization. |
| * Same as getInstance(NULL, "nfkc", UNORM2_COMPOSE, errorCode). |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 49 |
| */ |
| static const Normalizer2 * |
| getNFKCInstance(UErrorCode &errorCode); |
| |
| /** |
| * Returns a Normalizer2 instance for Unicode NFKD normalization. |
| * Same as getInstance(NULL, "nfkc", UNORM2_DECOMPOSE, errorCode). |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 49 |
| */ |
| static const Normalizer2 * |
| getNFKDInstance(UErrorCode &errorCode); |
| |
| /** |
| * Returns a Normalizer2 instance for Unicode NFKC_Casefold normalization. |
| * Same as getInstance(NULL, "nfkc_cf", UNORM2_COMPOSE, errorCode). |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 49 |
| */ |
| static const Normalizer2 * |
| getNFKCCasefoldInstance(UErrorCode &errorCode); |
| |
| /** |
| * Returns a Normalizer2 instance which uses the specified data file |
| * (packageName/name similar to ucnv_openPackage() and ures_open()/ResourceBundle) |
| * and which composes or decomposes text according to the specified mode. |
| * Returns an unmodifiable singleton instance. Do not delete it. |
| * |
| * Use packageName=NULL for data files that are part of ICU's own data. |
| * Use name="nfc" and UNORM2_COMPOSE/UNORM2_DECOMPOSE for Unicode standard NFC/NFD. |
| * Use name="nfkc" and UNORM2_COMPOSE/UNORM2_DECOMPOSE for Unicode standard NFKC/NFKD. |
| * Use name="nfkc_cf" and UNORM2_COMPOSE for Unicode standard NFKC_CF=NFKC_Casefold. |
| * |
| * @param packageName NULL for ICU built-in data, otherwise application data package name |
| * @param name "nfc" or "nfkc" or "nfkc_cf" or name of custom data file |
| * @param mode normalization mode (compose or decompose etc.) |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return the requested Normalizer2, if successful |
| * @stable ICU 4.4 |
| */ |
| static const Normalizer2 * |
| getInstance(const char *packageName, |
| const char *name, |
| UNormalization2Mode mode, |
| UErrorCode &errorCode); |
| |
| /** |
| * Returns the normalized form of the source string. |
| * @param src source string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return normalized src |
| * @stable ICU 4.4 |
| */ |
| UnicodeString |
| normalize(const UnicodeString &src, UErrorCode &errorCode) const { |
| UnicodeString result; |
| normalize(src, result, errorCode); |
| return result; |
| } |
| /** |
| * Writes the normalized form of the source string to the destination string |
| * (replacing its contents) and returns the destination string. |
| * The source and destination strings must be different objects. |
| * @param src source string |
| * @param dest destination string; its contents is replaced with normalized src |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return dest |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| normalize(const UnicodeString &src, |
| UnicodeString &dest, |
| UErrorCode &errorCode) const = 0; |
| |
| /** |
| * Normalizes a UTF-8 string and optionally records how source substrings |
| * relate to changed and unchanged result substrings. |
| * |
| * Currently implemented completely only for "compose" modes, |
| * such as for NFC, NFKC, and NFKC_Casefold |
| * (UNORM2_COMPOSE and UNORM2_COMPOSE_CONTIGUOUS). |
| * Otherwise currently converts to & from UTF-16 and does not support edits. |
| * |
| * @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET. |
| * @param src Source UTF-8 string. |
| * @param sink A ByteSink to which the normalized UTF-8 result string is written. |
| * sink.Flush() is called at the end. |
| * @param edits Records edits for index mapping, working with styled text, |
| * and getting only changes (if any). |
| * The Edits contents is undefined if any error occurs. |
| * This function calls edits->reset() first unless |
| * options includes U_EDITS_NO_RESET. edits can be nullptr. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @stable ICU 60 |
| */ |
| virtual void |
| normalizeUTF8(uint32_t options, StringPiece src, ByteSink &sink, |
| Edits *edits, UErrorCode &errorCode) const; |
| |
| /** |
| * Appends the normalized form of the second string to the first string |
| * (merging them at the boundary) and returns the first string. |
| * The result is normalized if the first string was normalized. |
| * The first and second strings must be different objects. |
| * @param first string, should be normalized |
| * @param second string, will be normalized |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return first |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| normalizeSecondAndAppend(UnicodeString &first, |
| const UnicodeString &second, |
| UErrorCode &errorCode) const = 0; |
| /** |
| * Appends the second string to the first string |
| * (merging them at the boundary) and returns the first string. |
| * The result is normalized if both the strings were normalized. |
| * The first and second strings must be different objects. |
| * @param first string, should be normalized |
| * @param second string, should be normalized |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return first |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| append(UnicodeString &first, |
| const UnicodeString &second, |
| UErrorCode &errorCode) const = 0; |
| |
| /** |
| * Gets the decomposition mapping of c. |
| * Roughly equivalent to normalizing the String form of c |
| * on a UNORM2_DECOMPOSE Normalizer2 instance, but much faster, and except that this function |
| * returns FALSE and does not write a string |
| * if c does not have a decomposition mapping in this instance's data. |
| * This function is independent of the mode of the Normalizer2. |
| * @param c code point |
| * @param decomposition String object which will be set to c's |
| * decomposition mapping, if there is one. |
| * @return TRUE if c has a decomposition, otherwise FALSE |
| * @stable ICU 4.6 |
| */ |
| virtual UBool |
| getDecomposition(UChar32 c, UnicodeString &decomposition) const = 0; |
| |
| /** |
| * Gets the raw decomposition mapping of c. |
| * |
| * This is similar to the getDecomposition() method but returns the |
| * raw decomposition mapping as specified in UnicodeData.txt or |
| * (for custom data) in the mapping files processed by the gennorm2 tool. |
| * By contrast, getDecomposition() returns the processed, |
| * recursively-decomposed version of this mapping. |
| * |
| * When used on a standard NFKC Normalizer2 instance, |
| * getRawDecomposition() returns the Unicode Decomposition_Mapping (dm) property. |
| * |
| * When used on a standard NFC Normalizer2 instance, |
| * it returns the Decomposition_Mapping only if the Decomposition_Type (dt) is Canonical (Can); |
| * in this case, the result contains either one or two code points (=1..4 char16_ts). |
| * |
| * This function is independent of the mode of the Normalizer2. |
| * The default implementation returns FALSE. |
| * @param c code point |
| * @param decomposition String object which will be set to c's |
| * raw decomposition mapping, if there is one. |
| * @return TRUE if c has a decomposition, otherwise FALSE |
| * @stable ICU 49 |
| */ |
| virtual UBool |
| getRawDecomposition(UChar32 c, UnicodeString &decomposition) const; |
| |
| /** |
| * Performs pairwise composition of a & b and returns the composite if there is one. |
| * |
| * Returns a composite code point c only if c has a two-way mapping to a+b. |
| * In standard Unicode normalization, this means that |
| * c has a canonical decomposition to a+b |
| * and c does not have the Full_Composition_Exclusion property. |
| * |
| * This function is independent of the mode of the Normalizer2. |
| * The default implementation returns a negative value. |
| * @param a A (normalization starter) code point. |
| * @param b Another code point. |
| * @return The non-negative composite code point if there is one; otherwise a negative value. |
| * @stable ICU 49 |
| */ |
| virtual UChar32 |
| composePair(UChar32 a, UChar32 b) const; |
| |
| /** |
| * Gets the combining class of c. |
| * The default implementation returns 0 |
| * but all standard implementations return the Unicode Canonical_Combining_Class value. |
| * @param c code point |
| * @return c's combining class |
| * @stable ICU 49 |
| */ |
| virtual uint8_t |
| getCombiningClass(UChar32 c) const; |
| |
| /** |
| * Tests if the string is normalized. |
| * Internally, in cases where the quickCheck() method would return "maybe" |
| * (which is only possible for the two COMPOSE modes) this method |
| * resolves to "yes" or "no" to provide a definitive result, |
| * at the cost of doing more work in those cases. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return TRUE if s is normalized |
| * @stable ICU 4.4 |
| */ |
| virtual UBool |
| isNormalized(const UnicodeString &s, UErrorCode &errorCode) const = 0; |
| /** |
| * Tests if the UTF-8 string is normalized. |
| * Internally, in cases where the quickCheck() method would return "maybe" |
| * (which is only possible for the two COMPOSE modes) this method |
| * resolves to "yes" or "no" to provide a definitive result, |
| * at the cost of doing more work in those cases. |
| * |
| * This works for all normalization modes, |
| * but it is currently optimized for UTF-8 only for "compose" modes, |
| * such as for NFC, NFKC, and NFKC_Casefold |
| * (UNORM2_COMPOSE and UNORM2_COMPOSE_CONTIGUOUS). |
| * For other modes it currently converts to UTF-16 and calls isNormalized(). |
| * |
| * @param s UTF-8 input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return TRUE if s is normalized |
| * @stable ICU 60 |
| */ |
| virtual UBool |
| isNormalizedUTF8(StringPiece s, UErrorCode &errorCode) const; |
| |
| |
| /** |
| * Tests if the string is normalized. |
| * For the two COMPOSE modes, the result could be "maybe" in cases that |
| * would take a little more work to resolve definitively. |
| * Use spanQuickCheckYes() and normalizeSecondAndAppend() for a faster |
| * combination of quick check + normalization, to avoid |
| * re-checking the "yes" prefix. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return UNormalizationCheckResult |
| * @stable ICU 4.4 |
| */ |
| virtual UNormalizationCheckResult |
| quickCheck(const UnicodeString &s, UErrorCode &errorCode) const = 0; |
| |
| /** |
| * Returns the end of the normalized substring of the input string. |
| * In other words, with <code>end=spanQuickCheckYes(s, ec);</code> |
| * the substring <code>UnicodeString(s, 0, end)</code> |
| * will pass the quick check with a "yes" result. |
| * |
| * The returned end index is usually one or more characters before the |
| * "no" or "maybe" character: The end index is at a normalization boundary. |
| * (See the class documentation for more about normalization boundaries.) |
| * |
| * When the goal is a normalized string and most input strings are expected |
| * to be normalized already, then call this method, |
| * and if it returns a prefix shorter than the input string, |
| * copy that prefix and use normalizeSecondAndAppend() for the remainder. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return "yes" span end index |
| * @stable ICU 4.4 |
| */ |
| virtual int32_t |
| spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const = 0; |
| |
| /** |
| * Tests if the character always has a normalization boundary before it, |
| * regardless of context. |
| * If true, then the character does not normalization-interact with |
| * preceding characters. |
| * In other words, a string containing this character can be normalized |
| * by processing portions before this character and starting from this |
| * character independently. |
| * This is used for iterative normalization. See the class documentation for details. |
| * @param c character to test |
| * @return TRUE if c has a normalization boundary before it |
| * @stable ICU 4.4 |
| */ |
| virtual UBool hasBoundaryBefore(UChar32 c) const = 0; |
| |
| /** |
| * Tests if the character always has a normalization boundary after it, |
| * regardless of context. |
| * If true, then the character does not normalization-interact with |
| * following characters. |
| * In other words, a string containing this character can be normalized |
| * by processing portions up to this character and after this |
| * character independently. |
| * This is used for iterative normalization. See the class documentation for details. |
| * Note that this operation may be significantly slower than hasBoundaryBefore(). |
| * @param c character to test |
| * @return TRUE if c has a normalization boundary after it |
| * @stable ICU 4.4 |
| */ |
| virtual UBool hasBoundaryAfter(UChar32 c) const = 0; |
| |
| /** |
| * Tests if the character is normalization-inert. |
| * If true, then the character does not change, nor normalization-interact with |
| * preceding or following characters. |
| * In other words, a string containing this character can be normalized |
| * by processing portions before this character and after this |
| * character independently. |
| * This is used for iterative normalization. See the class documentation for details. |
| * Note that this operation may be significantly slower than hasBoundaryBefore(). |
| * @param c character to test |
| * @return TRUE if c is normalization-inert |
| * @stable ICU 4.4 |
| */ |
| virtual UBool isInert(UChar32 c) const = 0; |
| }; |
| |
| /** |
| * Normalization filtered by a UnicodeSet. |
| * Normalizes portions of the text contained in the filter set and leaves |
| * portions not contained in the filter set unchanged. |
| * Filtering is done via UnicodeSet::span(..., USET_SPAN_SIMPLE). |
| * Not-in-the-filter text is treated as "is normalized" and "quick check yes". |
| * This class implements all of (and only) the Normalizer2 API. |
| * An instance of this class is unmodifiable/immutable but is constructed and |
| * must be destructed by the owner. |
| * @stable ICU 4.4 |
| */ |
| class U_COMMON_API FilteredNormalizer2 : public Normalizer2 { |
| public: |
| /** |
| * Constructs a filtered normalizer wrapping any Normalizer2 instance |
| * and a filter set. |
| * Both are aliased and must not be modified or deleted while this object |
| * is used. |
| * The filter set should be frozen; otherwise the performance will suffer greatly. |
| * @param n2 wrapped Normalizer2 instance |
| * @param filterSet UnicodeSet which determines the characters to be normalized |
| * @stable ICU 4.4 |
| */ |
| FilteredNormalizer2(const Normalizer2 &n2, const UnicodeSet &filterSet) : |
| norm2(n2), set(filterSet) {} |
| |
| /** |
| * Destructor. |
| * @stable ICU 4.4 |
| */ |
| ~FilteredNormalizer2(); |
| |
| /** |
| * Writes the normalized form of the source string to the destination string |
| * (replacing its contents) and returns the destination string. |
| * The source and destination strings must be different objects. |
| * @param src source string |
| * @param dest destination string; its contents is replaced with normalized src |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return dest |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| normalize(const UnicodeString &src, |
| UnicodeString &dest, |
| UErrorCode &errorCode) const U_OVERRIDE; |
| |
| /** |
| * Normalizes a UTF-8 string and optionally records how source substrings |
| * relate to changed and unchanged result substrings. |
| * |
| * Currently implemented completely only for "compose" modes, |
| * such as for NFC, NFKC, and NFKC_Casefold |
| * (UNORM2_COMPOSE and UNORM2_COMPOSE_CONTIGUOUS). |
| * Otherwise currently converts to & from UTF-16 and does not support edits. |
| * |
| * @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET. |
| * @param src Source UTF-8 string. |
| * @param sink A ByteSink to which the normalized UTF-8 result string is written. |
| * sink.Flush() is called at the end. |
| * @param edits Records edits for index mapping, working with styled text, |
| * and getting only changes (if any). |
| * The Edits contents is undefined if any error occurs. |
| * This function calls edits->reset() first unless |
| * options includes U_EDITS_NO_RESET. edits can be nullptr. |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @stable ICU 60 |
| */ |
| virtual void |
| normalizeUTF8(uint32_t options, StringPiece src, ByteSink &sink, |
| Edits *edits, UErrorCode &errorCode) const U_OVERRIDE; |
| |
| /** |
| * Appends the normalized form of the second string to the first string |
| * (merging them at the boundary) and returns the first string. |
| * The result is normalized if the first string was normalized. |
| * The first and second strings must be different objects. |
| * @param first string, should be normalized |
| * @param second string, will be normalized |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return first |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| normalizeSecondAndAppend(UnicodeString &first, |
| const UnicodeString &second, |
| UErrorCode &errorCode) const U_OVERRIDE; |
| /** |
| * Appends the second string to the first string |
| * (merging them at the boundary) and returns the first string. |
| * The result is normalized if both the strings were normalized. |
| * The first and second strings must be different objects. |
| * @param first string, should be normalized |
| * @param second string, should be normalized |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return first |
| * @stable ICU 4.4 |
| */ |
| virtual UnicodeString & |
| append(UnicodeString &first, |
| const UnicodeString &second, |
| UErrorCode &errorCode) const U_OVERRIDE; |
| |
| /** |
| * Gets the decomposition mapping of c. |
| * For details see the base class documentation. |
| * |
| * This function is independent of the mode of the Normalizer2. |
| * @param c code point |
| * @param decomposition String object which will be set to c's |
| * decomposition mapping, if there is one. |
| * @return TRUE if c has a decomposition, otherwise FALSE |
| * @stable ICU 4.6 |
| */ |
| virtual UBool |
| getDecomposition(UChar32 c, UnicodeString &decomposition) const U_OVERRIDE; |
| |
| /** |
| * Gets the raw decomposition mapping of c. |
| * For details see the base class documentation. |
| * |
| * This function is independent of the mode of the Normalizer2. |
| * @param c code point |
| * @param decomposition String object which will be set to c's |
| * raw decomposition mapping, if there is one. |
| * @return TRUE if c has a decomposition, otherwise FALSE |
| * @stable ICU 49 |
| */ |
| virtual UBool |
| getRawDecomposition(UChar32 c, UnicodeString &decomposition) const U_OVERRIDE; |
| |
| /** |
| * Performs pairwise composition of a & b and returns the composite if there is one. |
| * For details see the base class documentation. |
| * |
| * This function is independent of the mode of the Normalizer2. |
| * @param a A (normalization starter) code point. |
| * @param b Another code point. |
| * @return The non-negative composite code point if there is one; otherwise a negative value. |
| * @stable ICU 49 |
| */ |
| virtual UChar32 |
| composePair(UChar32 a, UChar32 b) const U_OVERRIDE; |
| |
| /** |
| * Gets the combining class of c. |
| * The default implementation returns 0 |
| * but all standard implementations return the Unicode Canonical_Combining_Class value. |
| * @param c code point |
| * @return c's combining class |
| * @stable ICU 49 |
| */ |
| virtual uint8_t |
| getCombiningClass(UChar32 c) const U_OVERRIDE; |
| |
| /** |
| * Tests if the string is normalized. |
| * For details see the Normalizer2 base class documentation. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return TRUE if s is normalized |
| * @stable ICU 4.4 |
| */ |
| virtual UBool |
| isNormalized(const UnicodeString &s, UErrorCode &errorCode) const U_OVERRIDE; |
| /** |
| * Tests if the UTF-8 string is normalized. |
| * Internally, in cases where the quickCheck() method would return "maybe" |
| * (which is only possible for the two COMPOSE modes) this method |
| * resolves to "yes" or "no" to provide a definitive result, |
| * at the cost of doing more work in those cases. |
| * |
| * This works for all normalization modes, |
| * but it is currently optimized for UTF-8 only for "compose" modes, |
| * such as for NFC, NFKC, and NFKC_Casefold |
| * (UNORM2_COMPOSE and UNORM2_COMPOSE_CONTIGUOUS). |
| * For other modes it currently converts to UTF-16 and calls isNormalized(). |
| * |
| * @param s UTF-8 input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return TRUE if s is normalized |
| * @stable ICU 60 |
| */ |
| virtual UBool |
| isNormalizedUTF8(StringPiece s, UErrorCode &errorCode) const U_OVERRIDE; |
| /** |
| * Tests if the string is normalized. |
| * For details see the Normalizer2 base class documentation. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return UNormalizationCheckResult |
| * @stable ICU 4.4 |
| */ |
| virtual UNormalizationCheckResult |
| quickCheck(const UnicodeString &s, UErrorCode &errorCode) const U_OVERRIDE; |
| /** |
| * Returns the end of the normalized substring of the input string. |
| * For details see the Normalizer2 base class documentation. |
| * @param s input string |
| * @param errorCode Standard ICU error code. Its input value must |
| * pass the U_SUCCESS() test, or else the function returns |
| * immediately. Check for U_FAILURE() on output or use with |
| * function chaining. (See User Guide for details.) |
| * @return "yes" span end index |
| * @stable ICU 4.4 |
| */ |
| virtual int32_t |
| spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const U_OVERRIDE; |
| |
| /** |
| * Tests if the character always has a normalization boundary before it, |
| * regardless of context. |
| * For details see the Normalizer2 base class documentation. |
| * @param c character to test |
| * @return TRUE if c has a normalization boundary before it |
| * @stable ICU 4.4 |
| */ |
| virtual UBool hasBoundaryBefore(UChar32 c) const U_OVERRIDE; |
| |
| /** |
| * Tests if the character always has a normalization boundary after it, |
| * regardless of context. |
| * For details see the Normalizer2 base class documentation. |
| * @param c character to test |
| * @return TRUE if c has a normalization boundary after it |
| * @stable ICU 4.4 |
| */ |
| virtual UBool hasBoundaryAfter(UChar32 c) const U_OVERRIDE; |
| |
| /** |
| * Tests if the character is normalization-inert. |
| * For details see the Normalizer2 base class documentation. |
| * @param c character to test |
| * @return TRUE if c is normalization-inert |
| * @stable ICU 4.4 |
| */ |
| virtual UBool isInert(UChar32 c) const U_OVERRIDE; |
| private: |
| UnicodeString & |
| normalize(const UnicodeString &src, |
| UnicodeString &dest, |
| USetSpanCondition spanCondition, |
| UErrorCode &errorCode) const; |
| |
| void |
| normalizeUTF8(uint32_t options, const char *src, int32_t length, |
| ByteSink &sink, Edits *edits, |
| USetSpanCondition spanCondition, |
| UErrorCode &errorCode) const; |
| |
| UnicodeString & |
| normalizeSecondAndAppend(UnicodeString &first, |
| const UnicodeString &second, |
| UBool doNormalize, |
| UErrorCode &errorCode) const; |
| |
| const Normalizer2 &norm2; |
| const UnicodeSet &set; |
| }; |
| |
| U_NAMESPACE_END |
| |
| #endif // !UCONFIG_NO_NORMALIZATION |
| #endif // __NORMALIZER2_H__ |
