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/* ******************************************************************************* * * Copyright (C) 2005-2012, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: ucasemap.h * encoding: US-ASCII * tab size: 8 (not used) * indentation:4 * * created on: 2005may06 * created by: Markus W. Scherer * * Case mapping service object and functions using it. */ #ifndef __UCASEMAP_H__ #define __UCASEMAP_H__ #include "unicode/utypes.h" #include "unicode/ustring.h" #include "unicode/localpointer.h" /** * \file * \brief C API: Unicode case mapping functions using a UCaseMap service object. * * The service object takes care of memory allocations, data loading, and setup * for the attributes, as usual. * * Currently, the functionality provided here does not overlap with uchar.h * and ustring.h, except for ucasemap_toTitle(). * * ucasemap_utf8XYZ() functions operate directly on UTF-8 strings. */ /** * UCaseMap is an opaque service object for newer ICU case mapping functions. * Older functions did not use a service object. * @stable ICU 3.4 */ struct UCaseMap; typedef struct UCaseMap UCaseMap; /**< C typedef for struct UCaseMap. @stable ICU 3.4 */ /** * Open a UCaseMap service object for a locale and a set of options. * The locale ID and options are preprocessed so that functions using the * service object need not process them in each call. * * @param locale ICU locale ID, used for language-dependent * upper-/lower-/title-casing according to the Unicode standard. * Usual semantics: ""=root, NULL=default locale, etc. * @param options Options bit set, used for case folding and string comparisons. * Same flags as for u_foldCase(), u_strFoldCase(), * u_strCaseCompare(), etc. * Use 0 or U_FOLD_CASE_DEFAULT for default behavior. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return Pointer to a UCaseMap service object, if successful. * * @see U_FOLD_CASE_DEFAULT * @see U_FOLD_CASE_EXCLUDE_SPECIAL_I * @see U_TITLECASE_NO_LOWERCASE * @see U_TITLECASE_NO_BREAK_ADJUSTMENT * @stable ICU 3.4 */ U_STABLE UCaseMap * U_EXPORT2 ucasemap_open(const char *locale, uint32_t options, UErrorCode *pErrorCode); /** * Close a UCaseMap service object. * @param csm Object to be closed. * @stable ICU 3.4 */ U_STABLE void U_EXPORT2 ucasemap_close(UCaseMap *csm); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUCaseMapPointer * "Smart pointer" class, closes a UCaseMap via ucasemap_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUCaseMapPointer, UCaseMap, ucasemap_close); U_NAMESPACE_END #endif /** * Get the locale ID that is used for language-dependent case mappings. * @param csm UCaseMap service object. * @return locale ID * @stable ICU 3.4 */ U_STABLE const char * U_EXPORT2 ucasemap_getLocale(const UCaseMap *csm); /** * Get the options bit set that is used for case folding and string comparisons. * @param csm UCaseMap service object. * @return options bit set * @stable ICU 3.4 */ U_STABLE uint32_t U_EXPORT2 ucasemap_getOptions(const UCaseMap *csm); /** * Set the locale ID that is used for language-dependent case mappings. * * @param csm UCaseMap service object. * @param locale Locale ID, see ucasemap_open(). * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * * @see ucasemap_open * @stable ICU 3.4 */ U_STABLE void U_EXPORT2 ucasemap_setLocale(UCaseMap *csm, const char *locale, UErrorCode *pErrorCode); /** * Set the options bit set that is used for case folding and string comparisons. * * @param csm UCaseMap service object. * @param options Options bit set, see ucasemap_open(). * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * * @see ucasemap_open * @stable ICU 3.4 */ U_STABLE void U_EXPORT2 ucasemap_setOptions(UCaseMap *csm, uint32_t options, UErrorCode *pErrorCode); /** * Do not lowercase non-initial parts of words when titlecasing. * Option bit for titlecasing APIs that take an options bit set. * * By default, titlecasing will titlecase the first cased character * of a word and lowercase all other characters. * With this option, the other characters will not be modified. * * @see ucasemap_setOptions * @see ucasemap_toTitle * @see ucasemap_utf8ToTitle * @see UnicodeString::toTitle * @stable ICU 3.8 */ #define U_TITLECASE_NO_LOWERCASE 0x100 /** * Do not adjust the titlecasing indexes from BreakIterator::next() indexes; * titlecase exactly the characters at breaks from the iterator. * Option bit for titlecasing APIs that take an options bit set. * * By default, titlecasing will take each break iterator index, * adjust it by looking for the next cased character, and titlecase that one. * Other characters are lowercased. * * This follows Unicode 4 & 5 section 3.13 Default Case Operations: * * R3 toTitlecase(X): Find the word boundaries based on Unicode Standard Annex * #29, "Text Boundaries." Between each pair of word boundaries, find the first * cased character F. If F exists, map F to default_title(F); then map each * subsequent character C to default_lower(C). * * @see ucasemap_setOptions * @see ucasemap_toTitle * @see ucasemap_utf8ToTitle * @see UnicodeString::toTitle * @see U_TITLECASE_NO_LOWERCASE * @stable ICU 3.8 */ #define U_TITLECASE_NO_BREAK_ADJUSTMENT 0x200 #if !UCONFIG_NO_BREAK_ITERATION /** * Get the break iterator that is used for titlecasing. * Do not modify the returned break iterator. * @param csm UCaseMap service object. * @return titlecasing break iterator * @stable ICU 3.8 */ U_STABLE const UBreakIterator * U_EXPORT2 ucasemap_getBreakIterator(const UCaseMap *csm); /** * Set the break iterator that is used for titlecasing. * The UCaseMap service object releases a previously set break iterator * and "adopts" this new one, taking ownership of it. * It will be released in a subsequent call to ucasemap_setBreakIterator() * or ucasemap_close(). * * Break iterator operations are not thread-safe. Therefore, titlecasing * functions use non-const UCaseMap objects. It is not possible to titlecase * strings concurrently using the same UCaseMap. * * @param csm UCaseMap service object. * @param iterToAdopt Break iterator to be adopted for titlecasing. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * * @see ucasemap_toTitle * @see ucasemap_utf8ToTitle * @stable ICU 3.8 */ U_STABLE void U_EXPORT2 ucasemap_setBreakIterator(UCaseMap *csm, UBreakIterator *iterToAdopt, UErrorCode *pErrorCode); /** * Titlecase a UTF-16 string. This function is almost a duplicate of u_strToTitle(), * except that it takes ucasemap_setOptions() into account and has performance * advantages from being able to use a UCaseMap object for multiple case mapping * operations, saving setup time. * * Casing is locale-dependent and context-sensitive. * Titlecasing uses a break iterator to find the first characters of words * that are to be titlecased. It titlecases those characters and lowercases * all others. (This can be modified with ucasemap_setOptions().) * * Note: This function takes a non-const UCaseMap pointer because it will * open a default break iterator if no break iterator was set yet, * and effectively call ucasemap_setBreakIterator(); * also because the break iterator is stateful and will be modified during * the iteration. * * The titlecase break iterator can be provided to customize for arbitrary * styles, using rules and dictionaries beyond the standard iterators. * The standard titlecase iterator for the root locale implements the * algorithm of Unicode TR 21. * * This function uses only the setUText(), first(), next() and close() methods of the * provided break iterator. * * The result may be longer or shorter than the original. * The source string and the destination buffer must not overlap. * * @param csm UCaseMap service object. This pointer is non-const! * See the note above for details. * @param dest A buffer for the result string. The result will be NUL-terminated if * the buffer is large enough. * The contents is undefined in case of failure. * @param destCapacity The size of the buffer (number of bytes). If it is 0, then * dest may be NULL and the function will only return the length of the result * without writing any of the result string. * @param src The original string. * @param srcLength The length of the original string. If -1, then src must be NUL-terminated. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return The length of the result string, if successful - or in case of a buffer overflow, * in which case it will be greater than destCapacity. * * @see u_strToTitle * @stable ICU 3.8 */ U_STABLE int32_t U_EXPORT2 ucasemap_toTitle(UCaseMap *csm, UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, UErrorCode *pErrorCode); #endif /** * Lowercase the characters in a UTF-8 string. * Casing is locale-dependent and context-sensitive. * The result may be longer or shorter than the original. * The source string and the destination buffer must not overlap. * * @param csm UCaseMap service object. * @param dest A buffer for the result string. The result will be NUL-terminated if * the buffer is large enough. * The contents is undefined in case of failure. * @param destCapacity The size of the buffer (number of bytes). If it is 0, then * dest may be NULL and the function will only return the length of the result * without writing any of the result string. * @param src The original string. * @param srcLength The length of the original string. If -1, then src must be NUL-terminated. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return The length of the result string, if successful - or in case of a buffer overflow, * in which case it will be greater than destCapacity. * * @see u_strToLower * @stable ICU 3.4 */ U_STABLE int32_t U_EXPORT2 ucasemap_utf8ToLower(const UCaseMap *csm, char *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode); /** * Uppercase the characters in a UTF-8 string. * Casing is locale-dependent and context-sensitive. * The result may be longer or shorter than the original. * The source string and the destination buffer must not overlap. * * @param csm UCaseMap service object. * @param dest A buffer for the result string. The result will be NUL-terminated if * the buffer is large enough. * The contents is undefined in case of failure. * @param destCapacity The size of the buffer (number of bytes). If it is 0, then * dest may be NULL and the function will only return the length of the result * without writing any of the result string. * @param src The original string. * @param srcLength The length of the original string. If -1, then src must be NUL-terminated. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return The length of the result string, if successful - or in case of a buffer overflow, * in which case it will be greater than destCapacity. * * @see u_strToUpper * @stable ICU 3.4 */ U_STABLE int32_t U_EXPORT2 ucasemap_utf8ToUpper(const UCaseMap *csm, char *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode); #if !UCONFIG_NO_BREAK_ITERATION /** * Titlecase a UTF-8 string. * Casing is locale-dependent and context-sensitive. * Titlecasing uses a break iterator to find the first characters of words * that are to be titlecased. It titlecases those characters and lowercases * all others. (This can be modified with ucasemap_setOptions().) * * Note: This function takes a non-const UCaseMap pointer because it will * open a default break iterator if no break iterator was set yet, * and effectively call ucasemap_setBreakIterator(); * also because the break iterator is stateful and will be modified during * the iteration. * * The titlecase break iterator can be provided to customize for arbitrary * styles, using rules and dictionaries beyond the standard iterators. * The standard titlecase iterator for the root locale implements the * algorithm of Unicode TR 21. * * This function uses only the setUText(), first(), next() and close() methods of the * provided break iterator. * * The result may be longer or shorter than the original. * The source string and the destination buffer must not overlap. * * @param csm UCaseMap service object. This pointer is non-const! * See the note above for details. * @param dest A buffer for the result string. The result will be NUL-terminated if * the buffer is large enough. * The contents is undefined in case of failure. * @param destCapacity The size of the buffer (number of bytes). If it is 0, then * dest may be NULL and the function will only return the length of the result * without writing any of the result string. * @param src The original string. * @param srcLength The length of the original string. If -1, then src must be NUL-terminated. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return The length of the result string, if successful - or in case of a buffer overflow, * in which case it will be greater than destCapacity. * * @see u_strToTitle * @see U_TITLECASE_NO_LOWERCASE * @see U_TITLECASE_NO_BREAK_ADJUSTMENT * @stable ICU 3.8 */ U_STABLE int32_t U_EXPORT2 ucasemap_utf8ToTitle(UCaseMap *csm, char *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode); #endif /** * Case-folds the characters in a UTF-8 string. * * Case-folding is locale-independent and not context-sensitive, * but there is an option for whether to include or exclude mappings for dotted I * and dotless i that are marked with 'T' in CaseFolding.txt. * * The result may be longer or shorter than the original. * The source string and the destination buffer must not overlap. * * @param csm UCaseMap service object. * @param dest A buffer for the result string. The result will be NUL-terminated if * the buffer is large enough. * The contents is undefined in case of failure. * @param destCapacity The size of the buffer (number of bytes). If it is 0, then * dest may be NULL and the function will only return the length of the result * without writing any of the result string. * @param src The original string. * @param srcLength The length of the original string. If -1, then src must be NUL-terminated. * @param pErrorCode Must be a valid pointer to an error code value, * which must not indicate a failure before the function call. * @return The length of the result string, if successful - or in case of a buffer overflow, * in which case it will be greater than destCapacity. * * @see u_strFoldCase * @see ucasemap_setOptions * @see U_FOLD_CASE_DEFAULT * @see U_FOLD_CASE_EXCLUDE_SPECIAL_I * @stable ICU 3.8 */ U_STABLE int32_t U_EXPORT2 ucasemap_utf8FoldCase(const UCaseMap *csm, char *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode); #endif