/* ******************************************************************************* * * Copyright (C) 2009-2010, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: unorm2.h * encoding: US-ASCII * tab size: 8 (not used) * indentation:4 * * created on: 2009dec15 * created by: Markus W. Scherer */ #ifndef __UNORM2_H__ #define __UNORM2_H__ /** * \file * \brief C API: New API for Unicode Normalization. * * Unicode normalization functionality for standard Unicode normalization or * for using custom mapping tables. * All instances of UNormalizer2 are unmodifiable/immutable. * Instances returned by unorm2_getInstance() are singletons that must not be deleted by the caller. * For more details see the Normalizer2 C++ class. */ #include "unicode/utypes.h" #include "unicode/localpointer.h" #include "unicode/uset.h" /** * Constants for normalization modes. * For details about standard Unicode normalization forms * and about the algorithms which are also used with custom mapping tables * see http://www.unicode.org/unicode/reports/tr15/ * @stable ICU 4.4 */ typedef enum { /** * Decomposition followed by composition. * Same as standard NFC when using an "nfc" instance. * Same as standard NFKC when using an "nfkc" instance. * For details about standard Unicode normalization forms * see http://www.unicode.org/unicode/reports/tr15/ * @stable ICU 4.4 */ UNORM2_COMPOSE, /** * Map, and reorder canonically. * Same as standard NFD when using an "nfc" instance. * Same as standard NFKD when using an "nfkc" instance. * For details about standard Unicode normalization forms * see http://www.unicode.org/unicode/reports/tr15/ * @stable ICU 4.4 */ UNORM2_DECOMPOSE, /** * "Fast C or D" form. * If a string is in this form, then further decomposition <i>without reordering</i> * would yield the same form as DECOMPOSE. * Text in "Fast C or D" form can be processed efficiently with data tables * that are "canonically closed", that is, that provide equivalent data for * equivalent text, without having to be fully normalized. * Not a standard Unicode normalization form. * Not a unique form: Different FCD strings can be canonically equivalent. * For details see http://www.unicode.org/notes/tn5/#FCD * @stable ICU 4.4 */ UNORM2_FCD, /** * Compose only contiguously. * Also known as "FCC" or "Fast C Contiguous". * The result will often but not always be in NFC. * The result will conform to FCD which is useful for processing. * Not a standard Unicode normalization form. * For details see http://www.unicode.org/notes/tn5/#FCC * @stable ICU 4.4 */ UNORM2_COMPOSE_CONTIGUOUS } UNormalization2Mode; /** * Result values for normalization quick check functions. * For details see http://www.unicode.org/reports/tr15/#Detecting_Normalization_Forms * @stable ICU 2.0 */ typedef enum UNormalizationCheckResult { /** * The input string is not in the normalization form. * @stable ICU 2.0 */ UNORM_NO, /** * The input string is in the normalization form. * @stable ICU 2.0 */ UNORM_YES, /** * The input string may or may not be in the normalization form. * This value is only returned for composition forms like NFC and FCC, * when a backward-combining character is found for which the surrounding text * would have to be analyzed further. * @stable ICU 2.0 */ UNORM_MAYBE } UNormalizationCheckResult; /** * Opaque C service object type for the new normalization API. * @stable ICU 4.4 */ struct UNormalizer2; typedef struct UNormalizer2 UNormalizer2; /**< C typedef for struct UNormalizer2. @stable ICU 4.4 */ #if !UCONFIG_NO_NORMALIZATION /** * Returns a UNormalizer2 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 pErrorCode 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 UNormalizer2, if successful * @stable ICU 4.4 */ U_STABLE const UNormalizer2 * U_EXPORT2 unorm2_getInstance(const char *packageName, const char *name, UNormalization2Mode mode, UErrorCode *pErrorCode); /** * Constructs a filtered normalizer wrapping any UNormalizer2 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 norm2 wrapped UNormalizer2 instance * @param filterSet USet which determines the characters to be normalized * @param pErrorCode 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 UNormalizer2, if successful * @stable ICU 4.4 */ U_STABLE UNormalizer2 * U_EXPORT2 unorm2_openFiltered(const UNormalizer2 *norm2, const USet *filterSet, UErrorCode *pErrorCode); /** * Closes a UNormalizer2 instance from unorm2_openFiltered(). * Do not close instances from unorm2_getInstance()! * @param norm2 UNormalizer2 instance to be closed * @stable ICU 4.4 */ U_STABLE void U_EXPORT2 unorm2_close(UNormalizer2 *norm2); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUNormalizer2Pointer * "Smart pointer" class, closes a UNormalizer2 via unorm2_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUNormalizer2Pointer, UNormalizer2, unorm2_close); U_NAMESPACE_END #endif /** * Writes the normalized form of the source string to the destination string * (replacing its contents) and returns the length of the destination string. * The source and destination strings must be different buffers. * @param norm2 UNormalizer2 instance * @param src source string * @param length length of the source string, or -1 if NUL-terminated * @param dest destination string; its contents is replaced with normalized src * @param capacity number of UChars that can be written to dest * @param pErrorCode 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 */ U_STABLE int32_t U_EXPORT2 unorm2_normalize(const UNormalizer2 *norm2, const UChar *src, int32_t length, UChar *dest, int32_t capacity, UErrorCode *pErrorCode); /** * Appends the normalized form of the second string to the first string * (merging them at the boundary) and returns the length of the first string. * The result is normalized if the first string was normalized. * The first and second strings must be different buffers. * @param norm2 UNormalizer2 instance * @param first string, should be normalized * @param firstLength length of the first string, or -1 if NUL-terminated * @param firstCapacity number of UChars that can be written to first * @param second string, will be normalized * @param secondLength length of the source string, or -1 if NUL-terminated * @param pErrorCode 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 */ U_STABLE int32_t U_EXPORT2 unorm2_normalizeSecondAndAppend(const UNormalizer2 *norm2, UChar *first, int32_t firstLength, int32_t firstCapacity, const UChar *second, int32_t secondLength, UErrorCode *pErrorCode); /** * Appends the second string to the first string * (merging them at the boundary) and returns the length of the first string. * The result is normalized if both the strings were normalized. * The first and second strings must be different buffers. * @param norm2 UNormalizer2 instance * @param first string, should be normalized * @param firstLength length of the first string, or -1 if NUL-terminated * @param firstCapacity number of UChars that can be written to first * @param second string, should be normalized * @param secondLength length of the source string, or -1 if NUL-terminated * @param pErrorCode 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 */ U_STABLE int32_t U_EXPORT2 unorm2_append(const UNormalizer2 *norm2, UChar *first, int32_t firstLength, int32_t firstCapacity, const UChar *second, int32_t secondLength, UErrorCode *pErrorCode); /** * Gets the decomposition mapping of c. Equivalent to unorm2_normalize(string(c)) * on a UNORM2_DECOMPOSE UNormalizer2 instance, but much faster. * This function is independent of the mode of the UNormalizer2. * @param norm2 UNormalizer2 instance * @param c code point * @param decomposition String buffer which will be set to c's * decomposition mapping, if there is one. * @param capacity number of UChars that can be written to decomposition * @param pErrorCode 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 non-negative length of c's decomposition, if there is one; otherwise a negative value * @draft ICU 4.6 */ U_DRAFT int32_t U_EXPORT2 unorm2_getDecomposition(const UNormalizer2 *norm2, UChar32 c, UChar *decomposition, int32_t capacity, UErrorCode *pErrorCode); /** * 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 norm2 UNormalizer2 instance * @param s input string * @param length length of the string, or -1 if NUL-terminated * @param pErrorCode 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 */ U_STABLE UBool U_EXPORT2 unorm2_isNormalized(const UNormalizer2 *norm2, const UChar *s, int32_t length, UErrorCode *pErrorCode); /** * 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 norm2 UNormalizer2 instance * @param s input string * @param length length of the string, or -1 if NUL-terminated * @param pErrorCode 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 */ U_STABLE UNormalizationCheckResult U_EXPORT2 unorm2_quickCheck(const UNormalizer2 *norm2, const UChar *s, int32_t length, UErrorCode *pErrorCode); /** * 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 norm2 UNormalizer2 instance * @param s input string * @param length length of the string, or -1 if NUL-terminated * @param pErrorCode 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 */ U_STABLE int32_t U_EXPORT2 unorm2_spanQuickCheckYes(const UNormalizer2 *norm2, const UChar *s, int32_t length, UErrorCode *pErrorCode); /** * Tests if the character always has a normalization boundary before it, * regardless of context. * For details see the Normalizer2 base class documentation. * @param norm2 UNormalizer2 instance * @param c character to test * @return TRUE if c has a normalization boundary before it * @stable ICU 4.4 */ U_STABLE UBool U_EXPORT2 unorm2_hasBoundaryBefore(const UNormalizer2 *norm2, UChar32 c); /** * Tests if the character always has a normalization boundary after it, * regardless of context. * For details see the Normalizer2 base class documentation. * @param norm2 UNormalizer2 instance * @param c character to test * @return TRUE if c has a normalization boundary after it * @stable ICU 4.4 */ U_STABLE UBool U_EXPORT2 unorm2_hasBoundaryAfter(const UNormalizer2 *norm2, UChar32 c); /** * Tests if the character is normalization-inert. * For details see the Normalizer2 base class documentation. * @param norm2 UNormalizer2 instance * @param c character to test * @return TRUE if c is normalization-inert * @stable ICU 4.4 */ U_STABLE UBool U_EXPORT2 unorm2_isInert(const UNormalizer2 *norm2, UChar32 c); #endif /* !UCONFIG_NO_NORMALIZATION */ #endif /* __UNORM2_H__ */