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// © 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" < "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 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 (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.
* @stable ICU 2.0
*/
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.
* @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 (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.
* @stable ICU 2.0
*/
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.
* @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
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