EIC code displayed by LXR master/​include/​unicode/​ucol.h	Source navigation Diff markup Identifier search General search
	Version: master test Revert   Change

Warning, file /include/unicode/ucol.h was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 // © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
 * Copyright (c) 1996-2015, 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"
 #include "unicode/uscript.h"
 
 #if U_SHOW_CPLUSPLUS_API
 #include "unicode/localpointer.h"
 #endif   // U_SHOW_CPLUSPLUS_API
 
 /**
  * \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.
  * <p>
  * For more information about the collation service see 
  * <a href="https://unicode-org.github.io/icu/userguide/collation">the User 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/reports/tr35/tr35-collation.html#Root_Collation">CLDR root 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="https://unicode-org.github.io/icu/userguide/collation/customization">
  * Collation Customization</a> section of the User Guide.
  * <p>
  * @see         UCollationResult
  * @see         UNormalizationMode
  * @see         UCollationStrength
  * @see         UCollationElements
  */
 
 /** 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 ucol_strcoll() method.
  * UCOL_EQUAL is returned if source string is compared to be equal to target
  * string in the ucol_strcoll() method.
  * UCOL_GREATER is returned if source string is compared to be greater than
  * target string in the ucol_strcoll() method.
  * @see ucol_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 controlling 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,
 
 #ifndef U_HIDE_DEPRECATED_API
     /**
      * One more than the highest normal UColAttributeValue value.
      * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
      */
   UCOL_ATTRIBUTE_VALUE_COUNT
 #endif  /* U_HIDE_DEPRECATED_API */
 } UColAttributeValue;
 
 /**
  * Enum containing the codes for reordering segments of the collation table that are not script
  * codes. These reordering codes are to be used in conjunction with the script codes.
  * @see ucol_getReorderCodes
  * @see ucol_setReorderCodes
  * @see ucol_getEquivalentReorderCodes
  * @see UScriptCode
  * @stable ICU 4.8
  */
  typedef enum {
    /**
     * A special reordering code that is used to specify the default
     * reordering codes for a locale.
     * @stable ICU 4.8
     */   
     UCOL_REORDER_CODE_DEFAULT       = -1,
    /**
     * A special reordering code that is used to specify no reordering codes.
     * @stable ICU 4.8
     */   
     UCOL_REORDER_CODE_NONE          = USCRIPT_UNKNOWN,
    /**
     * A special reordering code that is used to specify all other codes used for
     * reordering except for the codes lised as UColReorderCode values and those
     * listed explicitly in a reordering.
     * @stable ICU 4.8
     */   
     UCOL_REORDER_CODE_OTHERS        = USCRIPT_UNKNOWN,
    /**
     * Characters with the space property.
     * This is equivalent to the rule value "space".
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_SPACE         = 0x1000,
    /**
     * The first entry in the enumeration of reordering groups. This is intended for use in
     * range checking and enumeration of the reorder codes.
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_FIRST         = UCOL_REORDER_CODE_SPACE,
    /**
     * Characters with the punctuation property.
     * This is equivalent to the rule value "punct".
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_PUNCTUATION   = 0x1001,
    /**
     * Characters with the symbol property.
     * This is equivalent to the rule value "symbol".
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_SYMBOL        = 0x1002,
    /**
     * Characters with the currency property.
     * This is equivalent to the rule value "currency".
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_CURRENCY      = 0x1003,
    /**
     * Characters with the digit property.
     * This is equivalent to the rule value "digit".
     * @stable ICU 4.8
     */    
     UCOL_REORDER_CODE_DIGIT         = 0x1004,
 #ifndef U_HIDE_DEPRECATED_API
     /**
      * One more than the highest normal UColReorderCode value.
      * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
      */
     UCOL_REORDER_CODE_LIMIT         = 0x1005
 #endif  /* U_HIDE_DEPRECATED_API */
 } UColReorderCode;
 
 /**
  * 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" &lt; "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, "&auml;" >> "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" &lt;&lt;&lt; "ABC".
  *
  * Two characters are considered "identical" when they have the same
  * unicode spellings.  UCOL_IDENTICAL.
  * For example, "&auml;" == "&auml;".
  *
  * 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 Canadian 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.
       * @stable ICU 2.0
       */
      UCOL_FRENCH_COLLATION, 
      /** Attribute for handling variable elements.
       * Acceptable values are UCOL_NON_IGNORABLE
       * 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. The default setting in a Collator object depends on the
       * locale data loaded from the resources. For most locales, the
       * default is UCOL_NON_IGNORABLE, but for others, such as "th",
       * the default could be UCOL_SHIFTED.
       * @stable ICU 2.0
       */
      UCOL_ALTERNATE_HANDLING,
      /** Controls the ordering of upper and lower case letters.
       * Acceptable values are UCOL_OFF, 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. The default setting in a Collator object depends on the
       * locale data loaded from the resources. For most locales, the
       * default is UCOL_OFF, but for others, such as "da" or "mt",
       * the default could be UCOL_UPPER.
       * @stable ICU 2.0
       */
      UCOL_CASE_FIRST,
      /** Controls whether an extra case level (positioned before the third
       * level) is generated or not. Acceptable values are UCOL_OFF,
       * 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. The default setting in a Collator object depends
       * on the locale data loaded from the resources.
       * @stable ICU 2.0
       */
      UCOL_CASE_LEVEL,
      /** Controls whether the normalization check and necessary normalizations
       * are performed. When set to UCOL_OFF 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. The default setting in a
       * Collator object depends on the locale data loaded from the resources.
       * For many locales, the default is UCOL_OFF, but for others, such as "hi"
       * "vi', or "bn", * the default could be UCOL_ON.
       * @stable ICU 2.0
       */
      UCOL_NORMALIZATION_MODE, 
      /** An alias for UCOL_NORMALIZATION_MODE attribute.
       * @stable ICU 2.0
       */
      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.
       * 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.
       * @stable ICU 2.0
       */
      UCOL_STRENGTH,  
 #ifndef U_HIDE_DEPRECATED_API
      /** When turned on, this attribute positions Hiragana before all  
       * non-ignorables on quaternary level This is a sneaky way to produce JIS
       * sort order.
       *
       * This attribute was an implementation detail of the CLDR Japanese tailoring.
       * Since ICU 50, this attribute is not settable any more via API functions.
       * Since CLDR 25/ICU 53, explicit quaternary relations are used
       * to achieve the same Japanese sort order.
       *
       * @deprecated ICU 50 Implementation detail, cannot be set via API, was removed from implementation.
       */
      UCOL_HIRAGANA_QUATERNARY_MODE = UCOL_STRENGTH + 1,
 #endif  /* U_HIDE_DEPRECATED_API */
      /**
       * When turned on, this attribute makes
       * substrings of digits sort according to their numeric values.
       *
       * This is a way to get '100' to sort AFTER '2'. Note that the longest
       * digit substring that can be treated as a single unit is
       * 254 digits (not counting leading zeros). If a digit substring is
       * longer than that, the digits beyond the limit will be treated as a
       * separate digit substring.
       *
       * A "digit" in this sense is a code point with General_Category=Nd,
       * which does not include circled numbers, roman numerals, etc.
       * Only a contiguous digit substring is considered, that is,
       * non-negative integers without separators.
       * There is no support for plus/minus signs, decimals, exponents, etc.
       *
       * @stable ICU 2.8
       */
      UCOL_NUMERIC_COLLATION = UCOL_STRENGTH + 2, 
 
     /* Do not conditionalize the following with #ifndef U_HIDE_DEPRECATED_API,
      * it is needed for layout of RuleBasedCollator object. */
 #ifndef U_FORCE_HIDE_DEPRECATED_API
     /**
      * One more than the highest normal UColAttribute value.
      * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
      */
      UCOL_ATTRIBUTE_COUNT
 #endif  // U_FORCE_HIDE_DEPRECATED_API
 } UColAttribute;
 
 /** Options for retrieving the rule string 
  *  @stable ICU 2.0
  */
 typedef enum {
   /**
    * Retrieves the tailoring rules only.
    * Same as calling the version of getRules() without UColRuleOption.
    * @stable ICU 2.0
    */
   UCOL_TAILORING_ONLY, 
   /**
    * Retrieves the "UCA rules" concatenated with the tailoring rules.
    * The "UCA rules" are an <i>approximation</i> of the root collator's sort order.
    * They are almost never used or useful at runtime and can be removed from the data.
    * See https://unicode-org.github.io/icu/userguide/collation/customization#building-on-existing-locales
    * @stable ICU 2.0
    */
   UCOL_FULL_RULES 
 } UColRuleOption ;
 
 /**
  * Open a UCollator for comparing strings.
  *
  * For some languages, multiple collation types are available;
  * for example, "de@collation=phonebook".
  * Starting with ICU 54, collation attributes can be specified via locale keywords as well,
  * in the old locale extension syntax ("el@colCaseFirst=upper")
  * or in language tag syntax ("el-u-kf-upper").
  * See <a href="https://unicode-org.github.io/icu/userguide/collation/api">User Guide: Collation API</a>.
  *
  * 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, the root collator will be returned.
  * @param status A pointer to a UErrorCode to receive any errors
  * @return A pointer to a UCollator, or 0 if an error occurred.
  * @see ucol_openRules
  * @see ucol_clone
  * @see ucol_close
  * @stable ICU 2.0
  */
 U_CAPI UCollator* U_EXPORT2 
 ucol_open(const char *loc, UErrorCode *status);
 
 /**
  * Produce a 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 receive 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 a 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_clone
  * @see ucol_close
  * @stable ICU 2.0
  */
 U_CAPI UCollator* U_EXPORT2 
 ucol_openRules( const UChar        *rules,
                 int32_t            rulesLength,
                 UColAttributeValue normalizationMode,
                 UCollationStrength strength,
                 UParseError        *parseError,
                 UErrorCode         *status);
 
 #ifndef U_HIDE_DEPRECATED_API
 /** 
  * 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: 
  * https://unicode-org.github.io/icu/userguide/collation/concepts#collator-naming-scheme
  * Attributes are overridden 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 occurred (including an 
  *                   invalid attribute).
  * @see ucol_open
  * @see ucol_setAttribute
  * @see ucol_setVariableTop
  * @see ucol_getShortDefinitionString
  * @see ucol_normalizeShortDefinitionString
  * @deprecated ICU 54 Use ucol_open() with language tag collation keywords instead.
  */
 U_DEPRECATED UCollator* U_EXPORT2
 ucol_openFromShortString( const char *definition,
                           UBool forceDefaults,
                           UParseError *parseError,
                           UErrorCode *status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Get a set containing the contractions defined by the collator. The set includes
  * both the root collator's contractions and the contractions defined by the collator. This set
  * will contain only strings. If a tailoring explicitly suppresses contractions from 
  * the root collator (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
  *
  * @deprecated ICU 3.4, use ucol_getContractionsAndExpansions instead
  */
 U_DEPRECATED int32_t U_EXPORT2
 ucol_getContractions( const UCollator *coll,
                   USet *conts,
                   UErrorCode *status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * Get a set containing the expansions defined by the collator. The set includes
  * both the root collator's expansions and the expansions defined by the tailoring
  * @param coll collator
  * @param contractions if not NULL, the set to hold the contractions
  * @param expansions if not NULL, the set to hold the expansions
  * @param addPrefixes add the prefix contextual elements to contractions
  * @param status to hold the error code
  *
  * @stable ICU 3.4
  */
 U_CAPI void U_EXPORT2
 ucol_getContractionsAndExpansions( const UCollator *coll,
                   USet *contractions, USet *expansions,
                   UBool addPrefixes, 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_clone
  * @stable ICU 2.0
  */
 U_CAPI void U_EXPORT2 
 ucol_close(UCollator *coll);
 
 #if U_SHOW_CPLUSPLUS_API
 
 U_NAMESPACE_BEGIN
 
 /**
  * \class LocalUCollatorPointer
  * "Smart pointer" class, closes a UCollator via ucol_close().
  * For most methods see the LocalPointerBase base class.
  *
  * @see LocalPointerBase
  * @see LocalPointer
  * @stable ICU 4.4
  */
 U_DEFINE_LOCAL_OPEN_POINTER(LocalUCollatorPointer, UCollator, ucol_close);
 
 U_NAMESPACE_END
 
 #endif
 
 /**
  * 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_CAPI UCollationResult U_EXPORT2 
 ucol_strcoll(    const    UCollator    *coll,
         const    UChar        *source,
         int32_t            sourceLength,
         const    UChar        *target,
         int32_t            targetLength);
 
 /** 
 * Compare two strings in UTF-8. 
 * The strings will be compared using the options already specified. 
 * Note: When input string contains malformed a UTF-8 byte sequence, 
 * this function treats these bytes as REPLACEMENT CHARACTER (U+FFFD).
 * @param coll The UCollator containing the comparison rules. 
 * @param source The source UTF-8 string. 
 * @param sourceLength The length of source, or -1 if null-terminated. 
 * @param target The target UTF-8 string. 
 * @param targetLength The length of target, or -1 if null-terminated. 
 * @param status A pointer to a UErrorCode to receive any errors 
 * @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 50 
 */ 
 U_CAPI UCollationResult U_EXPORT2
 ucol_strcollUTF8(
         const UCollator *coll,
         const char      *source,
         int32_t         sourceLength,
         const char      *target,
         int32_t         targetLength,
         UErrorCode      *status);
 
 /**
  * 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_CAPI 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_CAPI 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_CAPI 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 strings.
  * 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 a UErrorCode to receive any errors
  * @see ucol_strcoll
  * @stable ICU 2.6
  */
 U_CAPI 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_CAPI 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_CAPI void U_EXPORT2 
 ucol_setStrength(UCollator *coll,
                  UCollationStrength strength);
 
 /**
  * Retrieves the reordering codes for this collator.
  * These reordering codes are a combination of UScript codes and UColReorderCode entries.
  * @param coll The UCollator to query.
  * @param dest The array to fill with the script ordering.
  * @param destCapacity The length of dest. If it is 0, then dest may be NULL and the function 
  * will only return the length of the result without writing any codes (pre-flighting).
  * @param pErrorCode Must be a valid pointer to an error code value, which must not indicate a 
  * failure before the function call.
  * @return The number of reordering codes written to the dest array.
  * @see ucol_setReorderCodes
  * @see ucol_getEquivalentReorderCodes
  * @see UScriptCode
  * @see UColReorderCode
  * @stable ICU 4.8
  */
 U_CAPI int32_t U_EXPORT2 
 ucol_getReorderCodes(const UCollator* coll,
                     int32_t* dest,
                     int32_t destCapacity,
                     UErrorCode *pErrorCode);
 /** 
  * Sets the reordering codes for this collator.
  * Collation reordering allows scripts and some other groups of characters
  * to be moved relative to each other. This reordering is done on top of
  * the DUCET/CLDR standard collation order. Reordering can specify groups to be placed 
  * at the start and/or the end of the collation order. These groups are specified using
  * UScript codes and UColReorderCode entries.
  *
  * <p>By default, reordering codes specified for the start of the order are placed in the 
  * order given after several special non-script blocks. These special groups of characters
  * are space, punctuation, symbol, currency, and digit. These special groups are represented with
  * UColReorderCode entries. Script groups can be intermingled with 
  * these special non-script groups if those special groups are explicitly specified in the reordering.
  *
  * <p>The special code OTHERS stands for any script that is not explicitly 
  * mentioned in the list of reordering codes given. Anything that is after OTHERS
  * will go at the very end of the reordering in the order given.
  *
  * <p>The special reorder code DEFAULT will reset the reordering for this collator
  * to the default for this collator. The default reordering may be the DUCET/CLDR order or may be a reordering that
  * was specified when this collator was created from resource data or from rules. The 
  * DEFAULT code <b>must</b> be the sole code supplied when it is used.
  * If not, then U_ILLEGAL_ARGUMENT_ERROR will be set.
  *
  * <p>The special reorder code NONE will remove any reordering for this collator.
  * The result of setting no reordering will be to have the DUCET/CLDR ordering used. The 
  * NONE code <b>must</b> be the sole code supplied when it is used.
  *
  * @param coll The UCollator to set.
  * @param reorderCodes An array of script codes in the new order. This can be NULL if the 
  * length is also set to 0. An empty array will clear any reordering codes on the collator.
  * @param reorderCodesLength The length of reorderCodes.
  * @param pErrorCode Must be a valid pointer to an error code value, which must not indicate a
  * failure before the function call.
  * @see ucol_getReorderCodes
  * @see ucol_getEquivalentReorderCodes
  * @see UScriptCode
  * @see UColReorderCode
  * @stable ICU 4.8
  */ 
 U_CAPI void U_EXPORT2 
 ucol_setReorderCodes(UCollator* coll,
                     const int32_t* reorderCodes,
                     int32_t reorderCodesLength,
                     UErrorCode *pErrorCode);
 
 /**
  * Retrieves the reorder codes that are grouped with the given reorder code. Some reorder
  * codes will be grouped and must reorder together.
  * Beginning with ICU 55, scripts only reorder together if they are primary-equal,
  * for example Hiragana and Katakana.
  *
  * @param reorderCode The reorder code to determine equivalence for.
  * @param dest The array to fill with the script ordering.
  * @param destCapacity The length of dest. If it is 0, then dest may be NULL and the function
  * will only return the length of the result without writing any codes (pre-flighting).
  * @param pErrorCode Must be a valid pointer to an error code value, which must not indicate 
  * a failure before the function call.
  * @return The number of reordering codes written to the dest array.
  * @see ucol_setReorderCodes
  * @see ucol_getReorderCodes
  * @see UScriptCode
  * @see UColReorderCode
  * @stable ICU 4.8
  */
 U_CAPI int32_t U_EXPORT2 
 ucol_getEquivalentReorderCodes(int32_t reorderCode,
                     int32_t* dest,
                     int32_t destCapacity,
                     UErrorCode *pErrorCode);
 
 /**
  * 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 a UErrorCode to receive any errors
  * @return The total buffer size needed; if greater than resultLength,
  * the output was truncated.
  * @stable ICU 2.0
  */
 U_CAPI 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 localeIndex 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_CAPI const char* U_EXPORT2 
 ucol_getAvailable(int32_t localeIndex);
 
 /**
  * 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_CAPI 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.
  * @stable ICU 3.0
  */
 U_CAPI 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.
  * @stable ICU 3.0
  */
 U_CAPI 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.
  * @stable ICU 3.0
  */
 U_CAPI UEnumeration* U_EXPORT2
 ucol_getKeywordValues(const char *keyword, UErrorCode *status);
 
 /**
  * Given a key and a locale, returns an array of string values in a preferred
  * order that would make a difference. These are all and only those values where
  * the open (creation) of the service with the locale formed from the input locale
  * plus input keyword and that value has different behavior than creation with the
  * input locale alone.
  * @param key           one of the keys supported by this service.  For now, only
  *                      "collation" is supported.
  * @param locale        the locale
  * @param commonlyUsed  if set to true it will return only commonly used values
  *                      with the given locale in preferred order.  Otherwise,
  *                      it will return all the available values for the locale.
  * @param status error status
  * @return a string enumeration over keyword values for the given key and the locale.
  * @stable ICU 4.2
  */
 U_CAPI UEnumeration* U_EXPORT2
 ucol_getKeywordValuesForLocale(const char* key,
                                const char* locale,
                                UBool commonlyUsed,
                                UErrorCode* status);
 
 /**
  * Return the functionally equivalent locale for the specified
  * input locale, with respect to given keyword, for the
  * collation service. If two different input locale + keyword
  * combinations produce the same result locale, then collators
  * instantiated for these two different input 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="https://unicode-org.github.io/icu/userguide/locale#locales-and-services">
  * Locales and Services</a> section of the ICU User Guide.
  * @param result fillin for the functionally equivalent result locale
  * @param resultCapacity capacity of the fillin buffer
  * @param keyword a particular keyword as enumerated by
  * ucol_getKeywords.
  * @param locale the specified input locale
  * @param isAvailable if non-NULL, pointer to a fillin parameter that
  * on return indicates whether the specified input 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.
  * @stable ICU 3.0
  */
 U_CAPI int32_t U_EXPORT2
 ucol_getFunctionalEquivalent(char* result, int32_t resultCapacity,
                              const char* keyword, const char* locale,
                              UBool* isAvailable, UErrorCode* status);
 
 /**
  * Get the collation tailoring rules from a UCollator.
  * The rules will follow the rule syntax.
  * @param coll The UCollator to query.
  * @param length 
  * @return The collation tailoring rules.
  * @stable ICU 2.0
  */
 U_CAPI const UChar* U_EXPORT2 
 ucol_getRules(    const    UCollator    *coll, 
         int32_t            *length);
 
 #ifndef U_HIDE_DEPRECATED_API
 /** 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 attributes 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: 
  *  https://unicode-org.github.io/icu/userguide/collation/concepts#collator-naming-scheme
  *  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
  *  @deprecated ICU 54
  */
 U_DEPRECATED 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
  * 
  *  @deprecated ICU 54
  */
 U_DEPRECATED int32_t U_EXPORT2
 ucol_normalizeShortDefinitionString(const char *source,
                                     char *destination,
                                     int32_t capacity,
                                     UParseError *parseError,
                                     UErrorCode *status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 
 /**
  * Get a sort key for a string from a UCollator.
  * Sort keys may be compared using <TT>strcmp</TT>.
  *
  * Note that sort keys are often less efficient than simply doing comparison.  
  * For more details, see the ICU User Guide.
  *
  * Like ICU functions that write to an output buffer, the buffer contents
  * is undefined if the buffer capacity (resultLength parameter) is too small.
  * Unlike ICU functions that write a string to an output buffer,
  * the terminating zero byte is counted in the sort key length.
  * @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.
  *      If there was an internal error generating the sort key,
  *      a zero value is returned.
  * @see ucol_keyHashCode
  * @stable ICU 2.0
  */
 U_CAPI 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.
  *
  *  The generated sort key may or may not be compatible with
  *  sort keys generated using ucol_getSortKey().
  *  @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_CAPI 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,
 #ifndef U_HIDE_DEPRECATED_API
     /**
      * One more than the highest normal UColBoundMode value.
      * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
      */
     UCOL_BOUND_VALUE_COUNT
 #endif  /* U_HIDE_DEPRECATED_API */
 } 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_CAPI 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_CAPI 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
  * @stable ICU 2.8
  */
 U_CAPI void U_EXPORT2
 ucol_getUCAVersion(const UCollator* coll, UVersionInfo info);
 
 /**
  * Merges 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.
  *
  * This is useful, for example, for combining sort keys from first and last names
  * to sort such pairs.
  * See http://www.unicode.org/reports/tr10/#Merging_Sort_Keys
  *
  * The recommended way to achieve "merged" sorting is by
  * concatenating strings with U+FFFE between them.
  * The concatenation has the same sort order as the merged sort keys,
  * but merge(getSortKey(str1), getSortKey(str2)) may differ from getSortKey(str1 + '\\uFFFE' + str2).
  * Using strings with U+FFFE may yield shorter sort keys.
  *
  * For details about Sort Key Features see
  * https://unicode-org.github.io/icu/userguide/collation/api#sort-key-features
  *
  * It is possible to merge multiple sort keys by consecutively merging
  * another one with the intermediate result.
  *
  * The length of the merge result is the sum of the lengths of the input sort keys.
  *
  * Example (uncompressed):
  * <pre>191B1D 01 050505 01 910505 00
  * 1F2123 01 050505 01 910505 00</pre>
  * will be merged as 
  * <pre>191B1D 02 1F2123 01 050505 02 050505 01 910505 02 910505 00</pre>
  *
  * If the destination buffer is not big enough, then its contents are undefined.
  * If any of source lengths are zero or any of the source pointers are NULL/undefined,
  * the result is of size zero.
  *
  * @param src1 the first sort key
  * @param src1Length the length of the first sort key, including the zero byte at the end;
  *        can be -1 if the function is to find the length
  * @param src2 the second sort key
  * @param src2Length the length of the second sort key, including the zero byte at the end;
  *        can be -1 if the function is to find the length
  * @param dest the buffer where the merged sort key is written,
  *        can be NULL if destCapacity==0
  * @param destCapacity the number of bytes in the dest buffer
  * @return the length of the merged sort key, src1Length+src2Length;
  *         can be larger than destCapacity, or 0 if an error occurs (only for illegal arguments),
  *         in which cases the contents of dest is undefined
  * @stable ICU 2.0
  */
 U_CAPI 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_CAPI 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_CAPI UColAttributeValue  U_EXPORT2 
 ucol_getAttribute(const UCollator *coll, UColAttribute attr, UErrorCode *status);
 
 /**
  * Sets the variable top to the top of the specified reordering group.
  * The variable top determines the highest-sorting character
  * which is affected by UCOL_ALTERNATE_HANDLING.
  * If that attribute is set to UCOL_NON_IGNORABLE, then the variable top has no effect.
  * @param coll the collator
  * @param group one of UCOL_REORDER_CODE_SPACE, UCOL_REORDER_CODE_PUNCTUATION,
  *              UCOL_REORDER_CODE_SYMBOL, UCOL_REORDER_CODE_CURRENCY;
  *              or UCOL_REORDER_CODE_DEFAULT to restore the default max variable group
  * @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.)
  * @see ucol_getMaxVariable
  * @stable ICU 53
  */
 U_CAPI void U_EXPORT2
 ucol_setMaxVariable(UCollator *coll, UColReorderCode group, UErrorCode *pErrorCode);
 
 /**
  * Returns the maximum reordering group whose characters are affected by UCOL_ALTERNATE_HANDLING.
  * @param coll the collator
  * @return the maximum variable reordering group.
  * @see ucol_setMaxVariable
  * @stable ICU 53
  */
 U_CAPI UColReorderCode U_EXPORT2
 ucol_getMaxVariable(const UCollator *coll);
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Sets the variable top to the primary weight of the specified string.
  *
  * Beginning with ICU 53, the variable top is pinned to
  * the top of one of the supported reordering groups,
  * and it must not be beyond the last of those groups.
  * See ucol_setMaxVariable().
  * @param coll the collator
  * @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 contraction<br>
  *    U_ILLEGAL_ARGUMENT_ERROR if the variable top is beyond
  *    the last reordering group supported by ucol_setMaxVariable()
  * @return variable top primary weight
  * @see ucol_getVariableTop
  * @see ucol_restoreVariableTop
  * @deprecated ICU 53 Call ucol_setMaxVariable() instead.
  */
 U_DEPRECATED uint32_t U_EXPORT2 
 ucol_setVariableTop(UCollator *coll, 
                     const UChar *varTop, int32_t len, 
                     UErrorCode *status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /** 
  * Gets the variable top value of a Collator. 
  * @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 primary weight
  * @see ucol_getMaxVariable
  * @see ucol_setVariableTop
  * @see ucol_restoreVariableTop
  * @stable ICU 2.0
  */
 U_CAPI uint32_t U_EXPORT2 ucol_getVariableTop(const UCollator *coll, UErrorCode *status);
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Sets the variable top to the specified primary weight.
  *
  * Beginning with ICU 53, the variable top is pinned to
  * the top of one of the supported reordering groups,
  * and it must not be beyond the last of those groups.
  * See ucol_setMaxVariable().
  * @param coll collator to be set
  * @param varTop primary weight, as returned by ucol_setVariableTop or ucol_getVariableTop
  * @param status error code
  * @see ucol_getVariableTop
  * @see ucol_setVariableTop
  * @deprecated ICU 53 Call ucol_setMaxVariable() instead.
  */
 U_DEPRECATED void U_EXPORT2 
 ucol_restoreVariableTop(UCollator *coll, const uint32_t varTop, UErrorCode *status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * Thread safe cloning operation. The result is a clone of a given collator.
  * @param coll collator to be cloned
  * @param status to indicate whether the operation went on smoothly or there were errors
  * @return pointer to the new clone
  * @see ucol_open
  * @see ucol_openRules
  * @see ucol_close
  * @stable ICU 71
  */
 U_CAPI UCollator* U_EXPORT2 ucol_clone(const UCollator *coll, UErrorCode *status);
 
 #ifndef U_HIDE_DEPRECATED_API
 
 /**
  * Thread safe cloning operation. The result is a clone of a given collator.
  * @param coll collator to be cloned
  * @param stackBuffer <em>Deprecated functionality as of ICU 52, use NULL.</em><br>
  * 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.
  * @param pBufferSize <em>Deprecated functionality as of ICU 52, use NULL or 1.</em><br>
  *  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 pBufferSize != NULL and any allocations were necessary
  * @return pointer to the new clone
  * @see ucol_open
  * @see ucol_openRules
  * @see ucol_close
  * @deprecated ICU 71 Use ucol_clone() instead.
  */
 U_DEPRECATED UCollator* U_EXPORT2
 ucol_safeClone(const UCollator *coll,
                void            *stackBuffer,
                int32_t         *pBufferSize,
                UErrorCode      *status);
 
 
 /** default memory size for the new clone.
  * @deprecated ICU 52. Do not rely on ucol_safeClone() cloning into any provided buffer.
  */
 #define U_COL_SAFECLONE_BUFFERSIZE 1
 
 #endif /* U_HIDE_DEPRECATED_API */
 
 /**
  * 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.
  *
  * ucol_getRules() should normally be used instead.
  * See https://unicode-org.github.io/icu/userguide/collation/customization#building-on-existing-locales
  * @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 length of buffer to store rules in. If less than needed you'll get only the part that fits in.
  * @return current rules
  * @stable ICU 2.0
  * @see UCOL_FULL_RULES
  */
 U_CAPI int32_t U_EXPORT2 
 ucol_getRulesEx(const UCollator *coll, UColRuleOption delta, UChar *buffer, int32_t bufferLen);
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * 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);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * 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.
  * @stable ICU 2.8
  */
 U_CAPI const char * U_EXPORT2
 ucol_getLocaleByType(const UCollator *coll, ULocDataLocaleType type, UErrorCode *status);
 
 /**
  * Get a 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_CAPI USet * U_EXPORT2
 ucol_getTailoredSet(const UCollator *coll, UErrorCode *status);
 
 #ifndef U_HIDE_INTERNAL_API
 /** 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_CAPI int32_t U_EXPORT2
 ucol_getUnsafeSet( const UCollator *coll,
                   USet *unsafe,
                   UErrorCode *status);
 
 /** 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_CAPI void U_EXPORT2
 ucol_prepareShortStringOpen( const char *definition,
                           UBool forceDefaults,
                           UParseError *parseError,
                           UErrorCode *status);
 #endif  /* U_HIDE_INTERNAL_API */
 
 /** 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
  *  @stable ICU 3.2
  */
 U_CAPI 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 must be the root collator.
  *  @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 Base collator, for lookup of untailored characters.
  *              Must be the root collator, must not be NULL.
  *              The base is required to be present through the lifetime of the collator.
  *  @param status for catching errors
  *  @return newly created collator
  *  @see ucol_cloneBinary
  *  @stable ICU 3.2
  */
 U_CAPI UCollator* U_EXPORT2
 ucol_openBinary(const uint8_t *bin, int32_t length, 
                 const UCollator *base, 
                 UErrorCode *status);
 
 
 #endif /* #if !UCONFIG_NO_COLLATION */
 
 #endif

This page was automatically generated by the 2.3.7 LXR engine. The LXR team