/* ******************************************************************************* * Copyright (c) 1996-2005, International Business Machines Corporation and others. * All Rights Reserved. ******************************************************************************* */ #ifndef UCOL_H #define UCOL_H #include "unicode/utypes.h" #if !UCONFIG_NO_COLLATION #include "unicode/unorm.h" #include "unicode/parseerr.h" #include "unicode/uloc.h" #include "unicode/uset.h" /** * \file * \brief C API: Collator * * <h2> Collator C API </h2> * * The C API for Collator performs locale-sensitive * string comparison. You use this service to build * searching and sorting routines for natural language text. * <em>Important: </em>The ICU collation service has been reimplemented * in order to achieve better performance and UCA compliance. * For details, see the * <a href="http://icu.sourceforge.net/cvs/icu/~checkout~/icuhtml/design/collation/ICU_collation_design.htm"> * collation design document</a>. * <p> * For more information about the collation service see * <a href="http://icu.sourceforge.net/icu/userguide/Collate_Intro.html">the users guide</a>. * <p> * Collation service provides correct sorting orders for most locales supported in ICU. * If specific data for a locale is not available, the orders eventually falls back * to the <a href="http://www.unicode.org/unicode/reports/tr10/">UCA sort order</a>. * <p> * Sort ordering may be customized by providing your own set of rules. For more on * this subject see the * <a href="http://icu.sourceforge.net/icu/userguide/Collate_Customization.html"> * Collation customization</a> section of the users guide. * <p> * @see UCollationResult * @see UNormalizationMode * @see UCollationStrength * @see UCollationElements */ /** A collation element iterator. * For usage in C programs. */ struct collIterate; /** structure representing collation element iterator instance * @stable ICU 2.0 */ typedef struct collIterate collIterate; /** A collator. * For usage in C programs. */ struct UCollator; /** structure representing a collator object instance * @stable ICU 2.0 */ typedef struct UCollator UCollator; /** * UCOL_LESS is returned if source string is compared to be less than target * string in the u_strcoll() method. * UCOL_EQUAL is returned if source string is compared to be equal to target * string in the u_strcoll() method. * UCOL_GREATER is returned if source string is compared to be greater than * target string in the u_strcoll() method. * @see u_strcoll() * <p> * Possible values for a comparison result * @stable ICU 2.0 */ typedef enum { /** string a == string b */ UCOL_EQUAL = 0, /** string a > string b */ UCOL_GREATER = 1, /** string a < string b */ UCOL_LESS = -1 } UCollationResult ; /** Enum containing attribute values for controling collation behavior. * Here are all the allowable values. Not every attribute can take every value. The only * universal value is UCOL_DEFAULT, which resets the attribute value to the predefined * value for that locale * @stable ICU 2.0 */ typedef enum { /** accepted by most attributes */ UCOL_DEFAULT = -1, /** Primary collation strength */ UCOL_PRIMARY = 0, /** Secondary collation strength */ UCOL_SECONDARY = 1, /** Tertiary collation strength */ UCOL_TERTIARY = 2, /** Default collation strength */ UCOL_DEFAULT_STRENGTH = UCOL_TERTIARY, UCOL_CE_STRENGTH_LIMIT, /** Quaternary collation strength */ UCOL_QUATERNARY=3, /** Identical collation strength */ UCOL_IDENTICAL=15, UCOL_STRENGTH_LIMIT, /** Turn the feature off - works for UCOL_FRENCH_COLLATION, UCOL_CASE_LEVEL, UCOL_HIRAGANA_QUATERNARY_MODE & UCOL_DECOMPOSITION_MODE*/ UCOL_OFF = 16, /** Turn the feature on - works for UCOL_FRENCH_COLLATION, UCOL_CASE_LEVEL, UCOL_HIRAGANA_QUATERNARY_MODE & UCOL_DECOMPOSITION_MODE*/ UCOL_ON = 17, /** Valid for UCOL_ALTERNATE_HANDLING. Alternate handling will be shifted */ UCOL_SHIFTED = 20, /** Valid for UCOL_ALTERNATE_HANDLING. Alternate handling will be non ignorable */ UCOL_NON_IGNORABLE = 21, /** Valid for UCOL_CASE_FIRST - lower case sorts before upper case */ UCOL_LOWER_FIRST = 24, /** upper case sorts before lower case */ UCOL_UPPER_FIRST = 25, UCOL_ATTRIBUTE_VALUE_COUNT } UColAttributeValue; /** * Base letter represents a primary difference. Set comparison * level to UCOL_PRIMARY to ignore secondary and tertiary differences. * Use this to set the strength of a Collator object. * Example of primary difference, "abc" < "abd" * * Diacritical differences on the same base letter represent a secondary * difference. Set comparison level to UCOL_SECONDARY to ignore tertiary * differences. Use this to set the strength of a Collator object. * Example of secondary difference, "ä" >> "a". * * Uppercase and lowercase versions of the same character represents a * tertiary difference. Set comparison level to UCOL_TERTIARY to include * all comparison differences. Use this to set the strength of a Collator * object. * Example of tertiary difference, "abc" <<< "ABC". * * Two characters are considered "identical" when they have the same * unicode spellings. UCOL_IDENTICAL. * For example, "ä" == "ä". * * UCollationStrength is also used to determine the strength of sort keys * generated from UCollator objects * These values can be now found in the UColAttributeValue enum. * @stable ICU 2.0 **/ typedef UColAttributeValue UCollationStrength; /** Attributes that collation service understands. All the attributes can take UCOL_DEFAULT * value, as well as the values specific to each one. * @stable ICU 2.0 */ typedef enum { /** Attribute for direction of secondary weights - used in French.\ * Acceptable values are UCOL_ON, which results in secondary weights * being considered backwards and UCOL_OFF which treats secondary * weights in the order they appear.*/ UCOL_FRENCH_COLLATION, /** Attribute for handling variable elements.\ * Acceptable values are UCOL_NON_IGNORABLE (default) * which treats all the codepoints with non-ignorable * primary weights in the same way, * and UCOL_SHIFTED which causes codepoints with primary * weights that are equal or below the variable top value * to be ignored on primary level and moved to the quaternary * level.*/ UCOL_ALTERNATE_HANDLING, /** Controls the ordering of upper and lower case letters.\ * Acceptable values are UCOL_OFF (default), which orders * upper and lower case letters in accordance to their tertiary * weights, UCOL_UPPER_FIRST which forces upper case letters to * sort before lower case letters, and UCOL_LOWER_FIRST which does * the opposite. */ UCOL_CASE_FIRST, /** Controls whether an extra case level (positioned before the third * level) is generated or not.\ Acceptable values are UCOL_OFF (default), * when case level is not generated, and UCOL_ON which causes the case * level to be generated.\ Contents of the case level are affected by * the value of UCOL_CASE_FIRST attribute.\ A simple way to ignore * accent differences in a string is to set the strength to UCOL_PRIMARY * and enable case level. */ UCOL_CASE_LEVEL, /** Controls whether the normalization check and necessary normalizations * are performed.\ When set to UCOL_OFF (default) no normalization check * is performed.\ The correctness of the result is guaranteed only if the * input data is in so-called FCD form (see users manual for more info).\ * When set to UCOL_ON, an incremental check is performed to see whether the input data * is in the FCD form.\ If the data is not in the FCD form, incremental * NFD normalization is performed. */ UCOL_NORMALIZATION_MODE, /** An alias for UCOL_NORMALIZATION_MODE attribute */ UCOL_DECOMPOSITION_MODE = UCOL_NORMALIZATION_MODE, /** The strength attribute.\ Can be either UCOL_PRIMARY, UCOL_SECONDARY, * UCOL_TERTIARY, UCOL_QUATERNARY or UCOL_IDENTICAL.\ The usual strength * for most locales (except Japanese) is tertiary.\ Quaternary strength * is useful when combined with shifted setting for alternate handling * attribute and for JIS x 4061 collation, when it is used to distinguish * between Katakana and Hiragana (this is achieved by setting the * UCOL_HIRAGANA_QUATERNARY mode to on.\ Otherwise, quaternary level * is affected only by the number of non ignorable code points in * the string.\ Identical strength is rarely useful, as it amounts * to codepoints of the NFD form of the string. */ UCOL_STRENGTH, /** when turned on, this attribute * positions Hiragana before all * non-ignorables on quaternary level * This is a sneaky way to produce JIS * sort order */ UCOL_HIRAGANA_QUATERNARY_MODE, /** when turned on, this attribute * generates a collation key * for the numeric value of substrings * of digits. This is a way to get '100' * to sort AFTER '2'.*/ UCOL_NUMERIC_COLLATION, UCOL_ATTRIBUTE_COUNT } UColAttribute; /** Options for retrieving the rule string * @stable ICU 2.0 */ typedef enum { /** Retrieve tailoring only */ UCOL_TAILORING_ONLY, /** Retrieve UCA rules and tailoring */ UCOL_FULL_RULES } UColRuleOption ; /** * Open a UCollator for comparing strings. * The UCollator pointer is used in all the calls to the Collation * service. After finished, collator must be disposed of by calling * {@link #ucol_close }. * @param loc The locale containing the required collation rules. * Special values for locales can be passed in - * if NULL is passed for the locale, the default locale * collation rules will be used. If empty string ("") or * "root" are passed, UCA rules will be used. * @param status A pointer to an UErrorCode to receive any errors * @return A pointer to a UCollator, or 0 if an error occurred. * @see ucol_openRules * @see ucol_safeClone * @see ucol_close * @stable ICU 2.0 */ U_STABLE UCollator* U_EXPORT2 ucol_open(const char *loc, UErrorCode *status); /** * Produce an UCollator instance according to the rules supplied. * The rules are used to change the default ordering, defined in the * UCA in a process called tailoring. The resulting UCollator pointer * can be used in the same way as the one obtained by {@link #ucol_strcoll }. * @param rules A string describing the collation rules. For the syntax * of the rules please see users guide. * @param rulesLength The length of rules, or -1 if null-terminated. * @param normalizationMode The normalization mode: One of * UCOL_OFF (expect the text to not need normalization), * UCOL_ON (normalize), or * UCOL_DEFAULT (set the mode according to the rules) * @param strength The default collation strength; one of UCOL_PRIMARY, UCOL_SECONDARY, * UCOL_TERTIARY, UCOL_IDENTICAL,UCOL_DEFAULT_STRENGTH - can be also set in the rules. * @param parseError A pointer to UParseError to recieve information about errors * occurred during parsing. This argument can currently be set * to NULL, but at users own risk. Please provide a real structure. * @param status A pointer to an UErrorCode to receive any errors * @return A pointer to a UCollator.\ It is not guaranteed that NULL be returned in case * of error - please use status argument to check for errors. * @see ucol_open * @see ucol_safeClone * @see ucol_close * @stable ICU 2.0 */ U_STABLE UCollator* U_EXPORT2 ucol_openRules( const UChar *rules, int32_t rulesLength, UColAttributeValue normalizationMode, UCollationStrength strength, UParseError *parseError, UErrorCode *status); /** * Open a collator defined by a short form string. * The structure and the syntax of the string is defined in the "Naming collators" * section of the users guide: * http://icu.sourceforge.net/icu/userguide/Collate_Concepts.html#Naming_Collators * Attributes are overriden by the subsequent attributes. So, for "S2_S3", final * strength will be 3. 3066bis locale overrides individual locale parts. * The call to this function is equivalent to a call to ucol_open, followed by a * series of calls to ucol_setAttribute and ucol_setVariableTop. * @param definition A short string containing a locale and a set of attributes. * Attributes not explicitly mentioned are left at the default * state for a locale. * @param parseError if not NULL, structure that will get filled with error's pre * and post context in case of error. * @param forceDefaults if FALSE, the settings that are the same as the collator * default settings will not be applied (for example, setting * French secondary on a French collator would not be executed). * If TRUE, all the settings will be applied regardless of the * collator default value. If the definition * strings are to be cached, should be set to FALSE. * @param status Error code. Apart from regular error conditions connected to * instantiating collators (like out of memory or similar), this * API will return an error if an invalid attribute or attribute/value * combination is specified. * @return A pointer to a UCollator or 0 if an error occured (including an * invalid attribute). * @see ucol_open * @see ucol_setAttribute * @see ucol_setVariableTop * @see ucol_getShortDefinitionString * @see ucol_normalizeShortDefinitionString * @draft ICU 3.0 * */ U_CAPI UCollator* U_EXPORT2 ucol_openFromShortString( const char *definition, UBool forceDefaults, UParseError *parseError, UErrorCode *status); /** * Get a set containing the contractions defined by the collator. The set includes * both the UCA contractions and the contractions defined by the collator. This set * will contain only strings. If a tailoring explicitly suppresses contractions from * the UCA (like Russian), removed contractions will not be in the resulting set. * @param coll collator * @param conts the set to hold the result. It gets emptied before * contractions are added. * @param status to hold the error code * @return the size of the contraction set * * @draft ICU 3.0 */ U_CAPI int32_t U_EXPORT2 ucol_getContractions( const UCollator *coll, USet *conts, UErrorCode *status); /** * Close a UCollator. * Once closed, a UCollator should not be used.\ Every open collator should * be closed.\ Otherwise, a memory leak will result. * @param coll The UCollator to close. * @see ucol_open * @see ucol_openRules * @see ucol_safeClone * @stable ICU 2.0 */ U_STABLE void U_EXPORT2 ucol_close(UCollator *coll); /** * Compare two strings. * The strings will be compared using the options already specified. * @param coll The UCollator containing the comparison rules. * @param source The source string. * @param sourceLength The length of source, or -1 if null-terminated. * @param target The target string. * @param targetLength The length of target, or -1 if null-terminated. * @return The result of comparing the strings; one of UCOL_EQUAL, * UCOL_GREATER, UCOL_LESS * @see ucol_greater * @see ucol_greaterOrEqual * @see ucol_equal * @stable ICU 2.0 */ U_STABLE UCollationResult U_EXPORT2 ucol_strcoll( const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength); /** * Determine if one string is greater than another. * This function is equivalent to {@link #ucol_strcoll } == UCOL_GREATER * @param coll The UCollator containing the comparison rules. * @param source The source string. * @param sourceLength The length of source, or -1 if null-terminated. * @param target The target string. * @param targetLength The length of target, or -1 if null-terminated. * @return TRUE if source is greater than target, FALSE otherwise. * @see ucol_strcoll * @see ucol_greaterOrEqual * @see ucol_equal * @stable ICU 2.0 */ U_STABLE UBool U_EXPORT2 ucol_greater(const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength); /** * Determine if one string is greater than or equal to another. * This function is equivalent to {@link #ucol_strcoll } != UCOL_LESS * @param coll The UCollator containing the comparison rules. * @param source The source string. * @param sourceLength The length of source, or -1 if null-terminated. * @param target The target string. * @param targetLength The length of target, or -1 if null-terminated. * @return TRUE if source is greater than or equal to target, FALSE otherwise. * @see ucol_strcoll * @see ucol_greater * @see ucol_equal * @stable ICU 2.0 */ U_STABLE UBool U_EXPORT2 ucol_greaterOrEqual(const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength); /** * Compare two strings for equality. * This function is equivalent to {@link #ucol_strcoll } == UCOL_EQUAL * @param coll The UCollator containing the comparison rules. * @param source The source string. * @param sourceLength The length of source, or -1 if null-terminated. * @param target The target string. * @param targetLength The length of target, or -1 if null-terminated. * @return TRUE if source is equal to target, FALSE otherwise * @see ucol_strcoll * @see ucol_greater * @see ucol_greaterOrEqual * @stable ICU 2.0 */ U_STABLE UBool U_EXPORT2 ucol_equal(const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength); /** * Compare two UTF-8 encoded trings. * The strings will be compared using the options already specified. * @param coll The UCollator containing the comparison rules. * @param sIter The source string iterator. * @param tIter The target string iterator. * @return The result of comparing the strings; one of UCOL_EQUAL, * UCOL_GREATER, UCOL_LESS * @param status A pointer to an UErrorCode to receive any errors * @see ucol_strcoll * @stable ICU 2.6 */ U_STABLE UCollationResult U_EXPORT2 ucol_strcollIter( const UCollator *coll, UCharIterator *sIter, UCharIterator *tIter, UErrorCode *status); /** * Get the collation strength used in a UCollator. * The strength influences how strings are compared. * @param coll The UCollator to query. * @return The collation strength; one of UCOL_PRIMARY, UCOL_SECONDARY, * UCOL_TERTIARY, UCOL_QUATERNARY, UCOL_IDENTICAL * @see ucol_setStrength * @stable ICU 2.0 */ U_STABLE UCollationStrength U_EXPORT2 ucol_getStrength(const UCollator *coll); /** * Set the collation strength used in a UCollator. * The strength influences how strings are compared. * @param coll The UCollator to set. * @param strength The desired collation strength; one of UCOL_PRIMARY, * UCOL_SECONDARY, UCOL_TERTIARY, UCOL_QUATERNARY, UCOL_IDENTICAL, UCOL_DEFAULT * @see ucol_getStrength * @stable ICU 2.0 */ U_STABLE void U_EXPORT2 ucol_setStrength(UCollator *coll, UCollationStrength strength); /** * Get the display name for a UCollator. * The display name is suitable for presentation to a user. * @param objLoc The locale of the collator in question. * @param dispLoc The locale for display. * @param result A pointer to a buffer to receive the attribute. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @return The total buffer size needed; if greater than resultLength, * the output was truncated. * @stable ICU 2.0 */ U_STABLE int32_t U_EXPORT2 ucol_getDisplayName( const char *objLoc, const char *dispLoc, UChar *result, int32_t resultLength, UErrorCode *status); /** * Get a locale for which collation rules are available. * A UCollator in a locale returned by this function will perform the correct * collation for the locale. * @param index The index of the desired locale. * @return A locale for which collation rules are available, or 0 if none. * @see ucol_countAvailable * @stable ICU 2.0 */ U_STABLE const char* U_EXPORT2 ucol_getAvailable(int32_t index); /** * Determine how many locales have collation rules available. * This function is most useful as determining the loop ending condition for * calls to {@link #ucol_getAvailable }. * @return The number of locales for which collation rules are available. * @see ucol_getAvailable * @stable ICU 2.0 */ U_STABLE int32_t U_EXPORT2 ucol_countAvailable(void); #if !UCONFIG_NO_SERVICE /** * Create a string enumerator of all locales for which a valid * collator may be opened. * @param status input-output error code * @return a string enumeration over locale strings. The caller is * responsible for closing the result. * @draft ICU 3.0 */ U_DRAFT UEnumeration* U_EXPORT2 ucol_openAvailableLocales(UErrorCode *status); #endif /** * Create a string enumerator of all possible keywords that are relevant to * collation. At this point, the only recognized keyword for this * service is "collation". * @param status input-output error code * @return a string enumeration over locale strings. The caller is * responsible for closing the result. * @draft ICU 3.0 */ U_DRAFT UEnumeration* U_EXPORT2 ucol_getKeywords(UErrorCode *status); /** * Given a keyword, create a string enumeration of all values * for that keyword that are currently in use. * @param keyword a particular keyword as enumerated by * ucol_getKeywords. If any other keyword is passed in, *status is set * to U_ILLEGAL_ARGUMENT_ERROR. * @param status input-output error code * @return a string enumeration over collation keyword values, or NULL * upon error. The caller is responsible for closing the result. * @draft ICU 3.0 */ U_DRAFT UEnumeration* U_EXPORT2 ucol_getKeywordValues(const char *keyword, UErrorCode *status); /** * Return the functionally equivalent locale for the given * requested locale, with respect to given keyword, for the * collation service. If two locales return the same result, then * collators instantiated for these locales will behave * equivalently. The converse is not always true; two collators * may in fact be equivalent, but return different results, due to * internal details. The return result has no other meaning than * that stated above, and implies nothing as to the relationship * between the two locales. This is intended for use by * applications who wish to cache collators, or otherwise reuse * collators when possible. The functional equivalent may change * over time. For more information, please see the <a * href="http://icu.sourceforge.net/icu/userguide/locale.html#services"> * Locales and Services</a> section of the ICU User Guide. * @param result fillin for the functionally equivalent locale * @param resultCapacity capacity of the fillin buffer * @param keyword a particular keyword as enumerated by * ucol_getKeywords. * @param locale the requested locale * @param isAvailable if non-NULL, pointer to a fillin parameter that * indicates whether the requested locale was 'available' to the * collation service. A locale is defined as 'available' if it * physically exists within the collation locale data. * @param status pointer to input-output error code * @return the actual buffer size needed for the locale. If greater * than resultCapacity, the returned full name will be truncated and * an error code will be returned. * @draft ICU 3.0 */ U_DRAFT int32_t U_EXPORT2 ucol_getFunctionalEquivalent(char* result, int32_t resultCapacity, const char* keyword, const char* locale, UBool* isAvailable, UErrorCode* status); /** * Get the collation rules from a UCollator. * The rules will follow the rule syntax. * @param coll The UCollator to query. * @param length * @return The collation rules. * @stable ICU 2.0 */ U_STABLE const UChar* U_EXPORT2 ucol_getRules( const UCollator *coll, int32_t *length); /** Get the short definition string for a collator. This API harvests the collator's * locale and the attribute set and produces a string that can be used for opening * a collator with the same properties using the ucol_openFromShortString API. * This string will be normalized. * The structure and the syntax of the string is defined in the "Naming collators" * section of the users guide: * http://icu.sourceforge.net/icu/userguide/Collate_Concepts.html#Naming_Collators * This API supports preflighting. * @param coll a collator * @param locale a locale that will appear as a collators locale in the resulting * short string definition. If NULL, the locale will be harvested * from the collator. * @param buffer space to hold the resulting string * @param capacity capacity of the buffer * @param status for returning errors. All the preflighting errors are featured * @return length of the resulting string * @see ucol_openFromShortString * @see ucol_normalizeShortDefinitionString * @draft ICU 3.0 */ U_CAPI int32_t U_EXPORT2 ucol_getShortDefinitionString(const UCollator *coll, const char *locale, char *buffer, int32_t capacity, UErrorCode *status); /** Verifies and normalizes short definition string. * Normalized short definition string has all the option sorted by the argument name, * so that equivalent definition strings are the same. * This API supports preflighting. * @param source definition string * @param destination space to hold the resulting string * @param capacity capacity of the buffer * @param parseError if not NULL, structure that will get filled with error's pre * and post context in case of error. * @param status Error code. This API will return an error if an invalid attribute * or attribute/value combination is specified. All the preflighting * errors are also featured * @return length of the resulting normalized string. * * @see ucol_openFromShortString * @see ucol_getShortDefinitionString * * @draft ICU 3.0 */ U_CAPI int32_t U_EXPORT2 ucol_normalizeShortDefinitionString(const char *source, char *destination, int32_t capacity, UParseError *parseError, UErrorCode *status); /** * Get a sort key for a string from a UCollator. * Sort keys may be compared using <TT>strcmp</TT>. * @param coll The UCollator containing the collation rules. * @param source The string to transform. * @param sourceLength The length of source, or -1 if null-terminated. * @param result A pointer to a buffer to receive the attribute. * @param resultLength The maximum size of result. * @return The size needed to fully store the sort key.. * @see ucol_keyHashCode * @stable ICU 2.0 */ U_STABLE int32_t U_EXPORT2 ucol_getSortKey(const UCollator *coll, const UChar *source, int32_t sourceLength, uint8_t *result, int32_t resultLength); /** Gets the next count bytes of a sort key. Caller needs * to preserve state array between calls and to provide * the same type of UCharIterator set with the same string. * The destination buffer provided must be big enough to store * the number of requested bytes. Generated sortkey is not * compatible with sortkeys generated using ucol_getSortKey * API, since we don't do any compression. If uncompressed * sortkeys are required, this API can be used. * @param coll The UCollator containing the collation rules. * @param iter UCharIterator containing the string we need * the sort key to be calculated for. * @param state Opaque state of sortkey iteration. * @param dest Buffer to hold the resulting sortkey part * @param count number of sort key bytes required. * @param status error code indicator. * @return the actual number of bytes of a sortkey. It can be * smaller than count if we have reached the end of * the sort key. * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 ucol_nextSortKeyPart(const UCollator *coll, UCharIterator *iter, uint32_t state[2], uint8_t *dest, int32_t count, UErrorCode *status); /** enum that is taken by ucol_getBound API * See below for explanation * do not change the values assigned to the * members of this enum. Underlying code * depends on them having these numbers * @stable ICU 2.0 */ typedef enum { /** lower bound */ UCOL_BOUND_LOWER = 0, /** upper bound that will match strings of exact size */ UCOL_BOUND_UPPER = 1, /** upper bound that will match all the strings that have the same initial substring as the given string */ UCOL_BOUND_UPPER_LONG = 2, UCOL_BOUND_VALUE_COUNT } UColBoundMode; /** * Produce a bound for a given sortkey and a number of levels. * Return value is always the number of bytes needed, regardless of * whether the result buffer was big enough or even valid.<br> * Resulting bounds can be used to produce a range of strings that are * between upper and lower bounds. For example, if bounds are produced * for a sortkey of string "smith", strings between upper and lower * bounds with one level would include "Smith", "SMITH", "sMiTh".<br> * There are two upper bounds that can be produced. If UCOL_BOUND_UPPER * is produced, strings matched would be as above. However, if bound * produced using UCOL_BOUND_UPPER_LONG is used, the above example will * also match "Smithsonian" and similar.<br> * For more on usage, see example in cintltst/capitst.c in procedure * TestBounds. * Sort keys may be compared using <TT>strcmp</TT>. * @param source The source sortkey. * @param sourceLength The length of source, or -1 if null-terminated. * (If an unmodified sortkey is passed, it is always null * terminated). * @param boundType Type of bound required. It can be UCOL_BOUND_LOWER, which * produces a lower inclusive bound, UCOL_BOUND_UPPER, that * produces upper bound that matches strings of the same length * or UCOL_BOUND_UPPER_LONG that matches strings that have the * same starting substring as the source string. * @param noOfLevels Number of levels required in the resulting bound (for most * uses, the recommended value is 1). See users guide for * explanation on number of levels a sortkey can have. * @param result A pointer to a buffer to receive the resulting sortkey. * @param resultLength The maximum size of result. * @param status Used for returning error code if something went wrong. If the * number of levels requested is higher than the number of levels * in the source key, a warning (U_SORT_KEY_TOO_SHORT_WARNING) is * issued. * @return The size needed to fully store the bound. * @see ucol_keyHashCode * @stable ICU 2.1 */ U_STABLE int32_t U_EXPORT2 ucol_getBound(const uint8_t *source, int32_t sourceLength, UColBoundMode boundType, uint32_t noOfLevels, uint8_t *result, int32_t resultLength, UErrorCode *status); /** * Gets the version information for a Collator. Version is currently * an opaque 32-bit number which depends, among other things, on major * versions of the collator tailoring and UCA. * @param coll The UCollator to query. * @param info the version # information, the result will be filled in * @stable ICU 2.0 */ U_STABLE void U_EXPORT2 ucol_getVersion(const UCollator* coll, UVersionInfo info); /** * Gets the UCA version information for a Collator. Version is the * UCA version number (3.1.1, 4.0). * @param coll The UCollator to query. * @param info the version # information, the result will be filled in * @draft ICU 2.8 */ U_DRAFT void U_EXPORT2 ucol_getUCAVersion(const UCollator* coll, UVersionInfo info); /** * Merge two sort keys. The levels are merged with their corresponding counterparts * (primaries with primaries, secondaries with secondaries etc.). Between the values * from the same level a separator is inserted. * example (uncompressed): * 191B1D 01 050505 01 910505 00 and 1F2123 01 050505 01 910505 00 * will be merged as * 191B1D 02 1F212301 050505 02 050505 01 910505 02 910505 00 * This allows for concatenating of first and last names for sorting, among other things. * If the destination buffer is not big enough, the results are undefined. * If any of source lengths are zero or any of source pointers are NULL/undefined, * result is of size zero. * @param src1 pointer to the first sortkey * @param src1Length length of the first sortkey * @param src2 pointer to the second sortkey * @param src2Length length of the second sortkey * @param dest buffer to hold the result * @param destCapacity size of the buffer for the result * @return size of the result. If the buffer is big enough size is always * src1Length+src2Length-1 * @stable ICU 2.0 */ U_STABLE int32_t U_EXPORT2 ucol_mergeSortkeys(const uint8_t *src1, int32_t src1Length, const uint8_t *src2, int32_t src2Length, uint8_t *dest, int32_t destCapacity); /** * Universal attribute setter * @param coll collator which attributes are to be changed * @param attr attribute type * @param value attribute value * @param status to indicate whether the operation went on smoothly or there were errors * @see UColAttribute * @see UColAttributeValue * @see ucol_getAttribute * @stable ICU 2.0 */ U_STABLE void U_EXPORT2 ucol_setAttribute(UCollator *coll, UColAttribute attr, UColAttributeValue value, UErrorCode *status); /** * Universal attribute getter * @param coll collator which attributes are to be changed * @param attr attribute type * @return attribute value * @param status to indicate whether the operation went on smoothly or there were errors * @see UColAttribute * @see UColAttributeValue * @see ucol_setAttribute * @stable ICU 2.0 */ U_STABLE UColAttributeValue U_EXPORT2 ucol_getAttribute(const UCollator *coll, UColAttribute attr, UErrorCode *status); /** Variable top * is a two byte primary value which causes all the codepoints with primary values that * are less or equal than the variable top to be shifted when alternate handling is set * to UCOL_SHIFTED. * Sets the variable top to a collation element value of a string supplied. * @param coll collator which variable top needs to be changed * @param varTop one or more (if contraction) UChars to which the variable top should be set * @param len length of variable top string. If -1 it is considered to be zero terminated. * @param status error code. If error code is set, the return value is undefined. * Errors set by this function are: <br> * U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such * a contraction<br> * U_PRIMARY_TOO_LONG_ERROR if the primary for the variable top has more than two bytes * @return a 32 bit value containing the value of the variable top in upper 16 bits. * Lower 16 bits are undefined * @see ucol_getVariableTop * @see ucol_restoreVariableTop * @stable ICU 2.0 */ U_STABLE uint32_t U_EXPORT2 ucol_setVariableTop(UCollator *coll, const UChar *varTop, int32_t len, UErrorCode *status); /** * Gets the variable top value of a Collator. * Lower 16 bits are undefined and should be ignored. * @param coll collator which variable top needs to be retrieved * @param status error code (not changed by function). If error code is set, * the return value is undefined. * @return the variable top value of a Collator. * @see ucol_setVariableTop * @see ucol_restoreVariableTop * @stable ICU 2.0 */ U_STABLE uint32_t U_EXPORT2 ucol_getVariableTop(const UCollator *coll, UErrorCode *status); /** * Sets the variable top to a collation element value supplied. Variable top is * set to the upper 16 bits. * Lower 16 bits are ignored. * @param coll collator which variable top needs to be changed * @param varTop CE value, as returned by ucol_setVariableTop or ucol)getVariableTop * @param status error code (not changed by function) * @see ucol_getVariableTop * @see ucol_setVariableTop * @stable ICU 2.0 */ U_STABLE void U_EXPORT2 ucol_restoreVariableTop(UCollator *coll, const uint32_t varTop, UErrorCode *status); /** * Thread safe cloning operation. The result is a clone of a given collator. * @param coll collator to be cloned * @param stackBuffer user allocated space for the new clone. * If NULL new memory will be allocated. * If buffer is not large enough, new memory will be allocated. * Clients can use the U_COL_SAFECLONE_BUFFERSIZE. * This will probably be enough to avoid memory allocations. * @param pBufferSize pointer to size of allocated space. * If *pBufferSize == 0, a sufficient size for use in cloning will * be returned ('pre-flighting') * If *pBufferSize is not enough for a stack-based safe clone, * new memory will be allocated. * @param status to indicate whether the operation went on smoothly or there were errors * An informational status value, U_SAFECLONE_ALLOCATED_ERROR, is used if any * allocations were necessary. * @return pointer to the new clone * @see ucol_open * @see ucol_openRules * @see ucol_close * @stable ICU 2.0 */ U_STABLE UCollator* U_EXPORT2 ucol_safeClone(const UCollator *coll, void *stackBuffer, int32_t *pBufferSize, UErrorCode *status); /** default memory size for the new clone. It needs to be this large for os/400 large pointers * @stable ICU 2.0 */ #define U_COL_SAFECLONE_BUFFERSIZE 512 /** * Returns current rules. Delta defines whether full rules are returned or just the tailoring. * Returns number of UChars needed to store rules. If buffer is NULL or bufferLen is not enough * to store rules, will store up to available space. * @param coll collator to get the rules from * @param delta one of UCOL_TAILORING_ONLY, UCOL_FULL_RULES. * @param buffer buffer to store the result in. If NULL, you'll get no rules. * @param bufferLen lenght of buffer to store rules in. If less then needed you'll get only the part that fits in. * @return current rules * @stable ICU 2.0 */ U_STABLE int32_t U_EXPORT2 ucol_getRulesEx(const UCollator *coll, UColRuleOption delta, UChar *buffer, int32_t bufferLen); /** * gets the locale name of the collator. If the collator * is instantiated from the rules, then this function returns * NULL. * @param coll The UCollator for which the locale is needed * @param type You can choose between requested, valid and actual * locale. For description see the definition of * ULocDataLocaleType in uloc.h * @param status error code of the operation * @return real locale name from which the collation data comes. * If the collator was instantiated from rules, returns * NULL. * @deprecated ICU 2.8 Use ucol_getLocaleByType instead */ U_DEPRECATED const char * U_EXPORT2 ucol_getLocale(const UCollator *coll, ULocDataLocaleType type, UErrorCode *status); /** * gets the locale name of the collator. If the collator * is instantiated from the rules, then this function returns * NULL. * @param coll The UCollator for which the locale is needed * @param type You can choose between requested, valid and actual * locale. For description see the definition of * ULocDataLocaleType in uloc.h * @param status error code of the operation * @return real locale name from which the collation data comes. * If the collator was instantiated from rules, returns * NULL. * @draft ICU 2.8 likely to change in ICU 3.0, based on feedback */ U_DRAFT const char * U_EXPORT2 ucol_getLocaleByType(const UCollator *coll, ULocDataLocaleType type, UErrorCode *status); /** * Get an Unicode set that contains all the characters and sequences tailored in * this collator. The result must be disposed of by using uset_close. * @param coll The UCollator for which we want to get tailored chars * @param status error code of the operation * @return a pointer to newly created USet. Must be be disposed by using uset_close * @see ucol_openRules * @see uset_close * @stable ICU 2.4 */ U_STABLE USet * U_EXPORT2 ucol_getTailoredSet(const UCollator *coll, UErrorCode *status); /** * Returned by ucol_collatorToIdentifier to signify that collator is * not encodable as an identifier. * @internal ICU 3.0 */ #define UCOL_SIT_COLLATOR_NOT_ENCODABLE 0x80000000 /** * Get a 31-bit identifier given a collator. * @param coll UCollator * @param locale a locale that will appear as a collators locale in the resulting * short string definition. If NULL, the locale will be harvested * from the collator. * @param status holds error messages * @return 31-bit identifier. MSB is used if the collator cannot be encoded. In that * case UCOL_SIT_COLLATOR_NOT_ENCODABLE is returned * @see ucol_openFromIdentifier * @see ucol_identifierToShortString * @internal ICU 3.0 */ U_INTERNAL uint32_t U_EXPORT2 ucol_collatorToIdentifier(const UCollator *coll, const char *locale, UErrorCode *status); /** * Open a collator given a 31-bit identifier * @param identifier 31-bit identifier, encoded by calling ucol_collatorToIdentifier * @param forceDefaults if FALSE, the settings that are the same as the collator * default settings will not be applied (for example, setting * French secondary on a French collator would not be executed). * If TRUE, all the settings will be applied regardless of the * collator default value. If the definition * strings that can be produced from a collator instantiated by * calling this API are to be cached, should be set to FALSE. * @param status for returning errors * @return UCollator object * @see ucol_collatorToIdentifier * @see ucol_identifierToShortString * @internal ICU 3.0 */ U_INTERNAL UCollator* U_EXPORT2 ucol_openFromIdentifier(uint32_t identifier, UBool forceDefaults, UErrorCode *status); /** * Calculate the short definition string given an identifier. Supports preflighting. * @param identifier 31-bit identifier, encoded by calling ucol_collatorToIdentifier * @param buffer buffer to store the result * @param capacity buffer capacity * @param forceDefaults whether the settings that are the same as the default setting * should be forced anyway. Setting this argument to FALSE reduces * the number of different configurations, but decreases performace * as a collator has to be instantiated. * @param status for returning errors * @return length of the short definition string * @see ucol_collatorToIdentifier * @see ucol_openFromIdentifier * @see ucol_shortStringToIdentifier * @internal ICU 3.0 */ U_INTERNAL int32_t U_EXPORT2 ucol_identifierToShortString(uint32_t identifier, char *buffer, int32_t capacity, UBool forceDefaults, UErrorCode *status); /** * Calculate the identifier given a short definition string. Supports preflighting. * @param definition short string definition * @param forceDefaults whether the settings that are the same as the default setting * should be forced anyway. Setting this argument to FALSE reduces * the number of different configurations, but decreases performace * as a collator has to be instantiated. * @param status for returning errors * @return identifier * @see ucol_collatorToIdentifier * @see ucol_openFromIdentifier * @see ucol_identifierToShortString * @internal ICU 3.0 */ U_INTERNAL uint32_t U_EXPORT2 ucol_shortStringToIdentifier(const char *definition, UBool forceDefaults, UErrorCode *status); /** * Universal attribute getter that returns UCOL_DEFAULT if the value is default * @param coll collator which attributes are to be changed * @param attr attribute type * @return attribute value or UCOL_DEFAULT if the value is default * @param status to indicate whether the operation went on smoothly or there were errors * @see UColAttribute * @see UColAttributeValue * @see ucol_setAttribute * @internal ICU 3.0 */ U_INTERNAL UColAttributeValue U_EXPORT2 ucol_getAttributeOrDefault(const UCollator *coll, UColAttribute attr, UErrorCode *status); /** Check whether two collators are equal. Collators are considered equal if they * will sort strings the same. This means that both the current attributes and the * rules must be equivalent. Currently used for RuleBasedCollator::operator==. * @param source first collator * @param target second collator * @return TRUE or FALSE * @internal ICU 3.0 */ U_INTERNAL UBool U_EXPORT2 ucol_equals(const UCollator *source, const UCollator *target); /** Calculates the set of unsafe code points, given a collator. * A character is unsafe if you could append any character and cause the ordering to alter significantly. * Collation sorts in normalized order, so anything that rearranges in normalization can cause this. * Thus if you have a character like a_umlaut, and you add a lower_dot to it, * then it normalizes to a_lower_dot + umlaut, and sorts differently. * @param coll Collator * @param unsafe a fill-in set to receive the unsafe points * @param status for catching errors * @return number of elements in the set * @internal ICU 3.0 */ U_INTERNAL int32_t U_EXPORT2 ucol_getUnsafeSet( const UCollator *coll, USet *unsafe, UErrorCode *status); /** Reset UCA's static pointers. You don't want to use this, unless your static memory can go away. * @internal ICU 3.2.1 */ U_INTERNAL void U_EXPORT2 ucol_forgetUCA(void); /** Touches all resources needed for instantiating a collator from a short string definition, * thus filling up the cache. * @param definition A short string containing a locale and a set of attributes. * Attributes not explicitly mentioned are left at the default * state for a locale. * @param parseError if not NULL, structure that will get filled with error's pre * and post context in case of error. * @param forceDefaults if FALSE, the settings that are the same as the collator * default settings will not be applied (for example, setting * French secondary on a French collator would not be executed). * If TRUE, all the settings will be applied regardless of the * collator default value. If the definition * strings are to be cached, should be set to FALSE. * @param status Error code. Apart from regular error conditions connected to * instantiating collators (like out of memory or similar), this * API will return an error if an invalid attribute or attribute/value * combination is specified. * @see ucol_openFromShortString * @internal ICU 3.2.1 */ U_INTERNAL void U_EXPORT2 ucol_prepareShortStringOpen( const char *definition, UBool forceDefaults, UParseError *parseError, UErrorCode *status); /** Creates a binary image of a collator. This binary image can be stored and * later used to instantiate a collator using ucol_openBinary. * This API supports preflighting. * @param coll Collator * @param buffer a fill-in buffer to receive the binary image * @param capacity capacity of the destination buffer * @param status for catching errors * @return size of the image * @see ucol_openBinary * @draft ICU 3.2 */ U_DRAFT int32_t U_EXPORT2 ucol_cloneBinary(const UCollator *coll, uint8_t *buffer, int32_t capacity, UErrorCode *status); /** Opens a collator from a collator binary image created using * ucol_cloneBinary. Binary image used in instantiation of the * collator remains owned by the user and should stay around for * the lifetime of the collator. The API also takes a base collator * which usualy should be UCA. * @param bin binary image owned by the user and required through the * lifetime of the collator * @param length size of the image. If negative, the API will try to * figure out the length of the image * @param base fallback collator, usually UCA. Base is required to be * present through the lifetime of the collator. Currently * it cannot be NULL. * @param status for catching errors * @return newly created collator * @see ucol_cloneBinary * @draft ICU 3.2 */ U_DRAFT UCollator* U_EXPORT2 ucol_openBinary(const uint8_t *bin, int32_t length, const UCollator *base, UErrorCode *status); #endif /* #if !UCONFIG_NO_COLLATION */ #endif