// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * * Copyright (C) 2002-2014, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: uset.h * encoding: UTF-8 * tab size: 8 (not used) * indentation:4 * * created on: 2002mar07 * created by: Markus W. Scherer * * C version of UnicodeSet. */ /** * \file * \brief C API: Unicode Set * * <p>This is a C wrapper around the C++ UnicodeSet class.</p> */ #ifndef __USET_H__ #define __USET_H__ #include "unicode/utypes.h" #include "unicode/uchar.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/localpointer.h" #endif // U_SHOW_CPLUSPLUS_API #ifndef USET_DEFINED #ifndef U_IN_DOXYGEN #define USET_DEFINED #endif /** * USet is the C API type corresponding to C++ class UnicodeSet. * Use the uset_* API to manipulate. Create with * uset_open*, and destroy with uset_close. * @stable ICU 2.4 */ typedef struct USet USet; #endif /** * Bitmask values to be passed to uset_openPatternOptions() or * uset_applyPattern() taking an option parameter. * * Use at most one of USET_CASE_INSENSITIVE, USET_ADD_CASE_MAPPINGS, USET_SIMPLE_CASE_INSENSITIVE. * These case options are mutually exclusive. * * Undefined options bits are ignored, and reserved for future use. * * @stable ICU 2.4 */ enum { … }; /** * Argument values for whether span() and similar functions continue while * the current character is contained vs. not contained in the set. * * The functionality is straightforward for sets with only single code points, * without strings (which is the common case): * - USET_SPAN_CONTAINED and USET_SPAN_SIMPLE work the same. * - USET_SPAN_CONTAINED and USET_SPAN_SIMPLE are inverses of USET_SPAN_NOT_CONTAINED. * - span() and spanBack() partition any string the same way when * alternating between span(USET_SPAN_NOT_CONTAINED) and * span(either "contained" condition). * - Using a complemented (inverted) set and the opposite span conditions * yields the same results. * * When a set contains multi-code point strings, then these statements may not * be true, depending on the strings in the set (for example, whether they * overlap with each other) and the string that is processed. * For a set with strings: * - The complement of the set contains the opposite set of code points, * but the same set of strings. * Therefore, complementing both the set and the span conditions * may yield different results. * - When starting spans at different positions in a string * (span(s, ...) vs. span(s+1, ...)) the ends of the spans may be different * because a set string may start before the later position. * - span(USET_SPAN_SIMPLE) may be shorter than * span(USET_SPAN_CONTAINED) because it will not recursively try * all possible paths. * For example, with a set which contains the three strings "xy", "xya" and "ax", * span("xyax", USET_SPAN_CONTAINED) will return 4 but * span("xyax", USET_SPAN_SIMPLE) will return 3. * span(USET_SPAN_SIMPLE) will never be longer than * span(USET_SPAN_CONTAINED). * - With either "contained" condition, span() and spanBack() may partition * a string in different ways. * For example, with a set which contains the two strings "ab" and "ba", * and when processing the string "aba", * span() will yield contained/not-contained boundaries of { 0, 2, 3 } * while spanBack() will yield boundaries of { 0, 1, 3 }. * * Note: If it is important to get the same boundaries whether iterating forward * or backward through a string, then either only span() should be used and * the boundaries cached for backward operation, or an ICU BreakIterator * could be used. * * Note: Unpaired surrogates are treated like surrogate code points. * Similarly, set strings match only on code point boundaries, * never in the middle of a surrogate pair. * Illegal UTF-8 sequences are treated like U+FFFD. * When processing UTF-8 strings, malformed set strings * (strings with unpaired surrogates which cannot be converted to UTF-8) * are ignored. * * @stable ICU 3.8 */ USetSpanCondition; enum { … }; /** * A serialized form of a Unicode set. Limited manipulations are * possible directly on a serialized set. See below. * @stable ICU 2.4 */ USerializedSet; /********************************************************************* * USet API *********************************************************************/ /** * Create an empty USet object. * Equivalent to uset_open(1, 0). * @return a newly created USet. The caller must call uset_close() on * it when done. * @stable ICU 4.2 */ U_CAPI USet* U_EXPORT2 uset_openEmpty(void); /** * Creates a USet object that contains the range of characters * start..end, inclusive. If <code>start > end</code> * then an empty set is created (same as using uset_openEmpty()). * @param start first character of the range, inclusive * @param end last character of the range, inclusive * @return a newly created USet. The caller must call uset_close() on * it when done. * @stable ICU 2.4 */ U_CAPI USet* U_EXPORT2 uset_open(UChar32 start, UChar32 end); /** * Creates a set from the given pattern. See the UnicodeSet class * description for the syntax of the pattern language. * @param pattern a string specifying what characters are in the set * @param patternLength the length of the pattern, or -1 if null * terminated * @param ec the error code * @stable ICU 2.4 */ U_CAPI USet* U_EXPORT2 uset_openPattern(const UChar* pattern, int32_t patternLength, UErrorCode* ec); /** * Creates a set from the given pattern. See the UnicodeSet class * description for the syntax of the pattern language. * @param pattern a string specifying what characters are in the set * @param patternLength the length of the pattern, or -1 if null * terminated * @param options bitmask for options to apply to the pattern. * Valid options are USET_IGNORE_SPACE and * at most one of USET_CASE_INSENSITIVE, USET_ADD_CASE_MAPPINGS, USET_SIMPLE_CASE_INSENSITIVE. * These case options are mutually exclusive. * @param ec the error code * @stable ICU 2.4 */ U_CAPI USet* U_EXPORT2 uset_openPatternOptions(const UChar* pattern, int32_t patternLength, uint32_t options, UErrorCode* ec); /** * Disposes of the storage used by a USet object. This function should * be called exactly once for objects returned by uset_open(). * @param set the object to dispose of * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_close(USet* set); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUSetPointer * "Smart pointer" class, closes a USet via uset_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(…); U_NAMESPACE_END #endif /** * Returns a copy of this object. * If this set is frozen, then the clone will be frozen as well. * Use uset_cloneAsThawed() for a mutable clone of a frozen set. * @param set the original set * @return the newly allocated copy of the set * @see uset_cloneAsThawed * @stable ICU 3.8 */ U_CAPI USet * U_EXPORT2 uset_clone(const USet *set); /** * Determines whether the set has been frozen (made immutable) or not. * See the ICU4J Freezable interface for details. * @param set the set * @return true/false for whether the set has been frozen * @see uset_freeze * @see uset_cloneAsThawed * @stable ICU 3.8 */ U_CAPI UBool U_EXPORT2 uset_isFrozen(const USet *set); /** * Freeze the set (make it immutable). * Once frozen, it cannot be unfrozen and is therefore thread-safe * until it is deleted. * See the ICU4J Freezable interface for details. * Freezing the set may also make some operations faster, for example * uset_contains() and uset_span(). * A frozen set will not be modified. (It remains frozen.) * @param set the set * @return the same set, now frozen * @see uset_isFrozen * @see uset_cloneAsThawed * @stable ICU 3.8 */ U_CAPI void U_EXPORT2 uset_freeze(USet *set); /** * Clone the set and make the clone mutable. * See the ICU4J Freezable interface for details. * @param set the set * @return the mutable clone * @see uset_freeze * @see uset_isFrozen * @see uset_clone * @stable ICU 3.8 */ U_CAPI USet * U_EXPORT2 uset_cloneAsThawed(const USet *set); /** * Causes the USet object to represent the range <code>start - end</code>. * If <code>start > end</code> then this USet is set to an empty range. * A frozen set will not be modified. * @param set the object to set to the given range * @param start first character in the set, inclusive * @param end last character in the set, inclusive * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_set(USet* set, UChar32 start, UChar32 end); /** * Modifies the set to represent the set specified by the given * pattern. See the UnicodeSet class description for the syntax of * the pattern language. See also the User Guide chapter about UnicodeSet. * <em>Empties the set passed before applying the pattern.</em> * A frozen set will not be modified. * @param set The set to which the pattern is to be applied. * @param pattern A pointer to UChar string specifying what characters are in the set. * The character at pattern[0] must be a '['. * @param patternLength The length of the UChar string. -1 if NUL terminated. * @param options A bitmask for options to apply to the pattern. * Valid options are USET_IGNORE_SPACE and * at most one of USET_CASE_INSENSITIVE, USET_ADD_CASE_MAPPINGS, * USET_SIMPLE_CASE_INSENSITIVE. * These case options are mutually exclusive. * @param status Returns an error if the pattern cannot be parsed. * @return Upon successful parse, the value is either * the index of the character after the closing ']' * of the parsed pattern. * If the status code indicates failure, then the return value * is the index of the error in the source. * * @stable ICU 2.8 */ U_CAPI int32_t U_EXPORT2 uset_applyPattern(USet *set, const UChar *pattern, int32_t patternLength, uint32_t options, UErrorCode *status); /** * Modifies the set to contain those code points which have the given value * for the given binary or enumerated property, as returned by * u_getIntPropertyValue. Prior contents of this set are lost. * A frozen set will not be modified. * * @param set the object to contain the code points defined by the property * * @param prop a property in the range UCHAR_BIN_START..UCHAR_BIN_LIMIT-1 * or UCHAR_INT_START..UCHAR_INT_LIMIT-1 * or UCHAR_MASK_START..UCHAR_MASK_LIMIT-1. * * @param value a value in the range u_getIntPropertyMinValue(prop).. * u_getIntPropertyMaxValue(prop), with one exception. If prop is * UCHAR_GENERAL_CATEGORY_MASK, then value should not be a UCharCategory, but * rather a mask value produced by U_GET_GC_MASK(). This allows grouped * categories such as [:L:] to be represented. * * @param ec error code input/output parameter * * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_applyIntPropertyValue(USet* set, UProperty prop, int32_t value, UErrorCode* ec); /** * Modifies the set to contain those code points which have the * given value for the given property. Prior contents of this * set are lost. * A frozen set will not be modified. * * @param set the object to contain the code points defined by the given * property and value alias * * @param prop a string specifying a property alias, either short or long. * The name is matched loosely. See PropertyAliases.txt for names and a * description of loose matching. If the value string is empty, then this * string is interpreted as either a General_Category value alias, a Script * value alias, a binary property alias, or a special ID. Special IDs are * matched loosely and correspond to the following sets: * * "ANY" = [\\u0000-\\U0010FFFF], * "ASCII" = [\\u0000-\\u007F], * "Assigned" = [:^Cn:]. * * @param propLength the length of the prop, or -1 if NULL * * @param value a string specifying a value alias, either short or long. * The name is matched loosely. See PropertyValueAliases.txt for names * and a description of loose matching. In addition to aliases listed, * numeric values and canonical combining classes may be expressed * numerically, e.g., ("nv", "0.5") or ("ccc", "220"). The value string * may also be empty. * * @param valueLength the length of the value, or -1 if NULL * * @param ec error code input/output parameter * * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_applyPropertyAlias(USet* set, const UChar *prop, int32_t propLength, const UChar *value, int32_t valueLength, UErrorCode* ec); /** * Return true if the given position, in the given pattern, appears * to be the start of a UnicodeSet pattern. * * @param pattern a string specifying the pattern * @param patternLength the length of the pattern, or -1 if NULL * @param pos the given position * @stable ICU 3.2 */ U_CAPI UBool U_EXPORT2 uset_resemblesPattern(const UChar *pattern, int32_t patternLength, int32_t pos); /** * Returns a string representation of this set. If the result of * calling this function is passed to a uset_openPattern(), it * will produce another set that is equal to this one. * @param set the set * @param result the string to receive the rules, may be NULL * @param resultCapacity the capacity of result, may be 0 if result is NULL * @param escapeUnprintable if true then convert unprintable * character to their hex escape representations, \\uxxxx or * \\Uxxxxxxxx. Unprintable characters are those other than * U+000A, U+0020..U+007E. * @param ec error code. * @return length of string, possibly larger than resultCapacity * @stable ICU 2.4 */ U_CAPI int32_t U_EXPORT2 uset_toPattern(const USet* set, UChar* result, int32_t resultCapacity, UBool escapeUnprintable, UErrorCode* ec); /** * Adds the given character to the given USet. After this call, * uset_contains(set, c) will return true. * A frozen set will not be modified. * @param set the object to which to add the character * @param c the character to add * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_add(USet* set, UChar32 c); /** * Adds all of the elements in the specified set to this set if * they're not already present. This operation effectively * modifies this set so that its value is the <i>union</i> of the two * sets. The behavior of this operation is unspecified if the specified * collection is modified while the operation is in progress. * A frozen set will not be modified. * * @param set the object to which to add the set * @param additionalSet the source set whose elements are to be added to this set. * @stable ICU 2.6 */ U_CAPI void U_EXPORT2 uset_addAll(USet* set, const USet *additionalSet); /** * Adds the given range of characters to the given USet. After this call, * uset_contains(set, start, end) will return true. * A frozen set will not be modified. * @param set the object to which to add the character * @param start the first character of the range to add, inclusive * @param end the last character of the range to add, inclusive * @stable ICU 2.2 */ U_CAPI void U_EXPORT2 uset_addRange(USet* set, UChar32 start, UChar32 end); /** * Adds the given string to the given USet. After this call, * uset_containsString(set, str, strLen) will return true. * A frozen set will not be modified. * @param set the object to which to add the character * @param str the string to add * @param strLen the length of the string or -1 if null terminated. * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_addString(USet* set, const UChar* str, int32_t strLen); /** * Adds each of the characters in this string to the set. Note: "ch" => {"c", "h"} * If this set already contains any particular character, it has no effect on that character. * A frozen set will not be modified. * @param set the object to which to add the character * @param str the source string * @param strLen the length of the string or -1 if null terminated. * @stable ICU 3.4 */ U_CAPI void U_EXPORT2 uset_addAllCodePoints(USet* set, const UChar *str, int32_t strLen); /** * Removes the given character from the given USet. After this call, * uset_contains(set, c) will return false. * A frozen set will not be modified. * @param set the object from which to remove the character * @param c the character to remove * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_remove(USet* set, UChar32 c); /** * Removes the given range of characters from the given USet. After this call, * uset_contains(set, start, end) will return false. * A frozen set will not be modified. * @param set the object to which to add the character * @param start the first character of the range to remove, inclusive * @param end the last character of the range to remove, inclusive * @stable ICU 2.2 */ U_CAPI void U_EXPORT2 uset_removeRange(USet* set, UChar32 start, UChar32 end); /** * Removes the given string to the given USet. After this call, * uset_containsString(set, str, strLen) will return false. * A frozen set will not be modified. * @param set the object to which to add the character * @param str the string to remove * @param strLen the length of the string or -1 if null terminated. * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_removeString(USet* set, const UChar* str, int32_t strLen); /** * Removes EACH of the characters in this string. Note: "ch" == {"c", "h"} * A frozen set will not be modified. * * @param set the object to be modified * @param str the string * @param length the length of the string, or -1 if NUL-terminated * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_removeAllCodePoints(USet *set, const UChar *str, int32_t length); /** * Removes from this set all of its elements that are contained in the * specified set. This operation effectively modifies this * set so that its value is the <i>asymmetric set difference</i> of * the two sets. * A frozen set will not be modified. * @param set the object from which the elements are to be removed * @param removeSet the object that defines which elements will be * removed from this set * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_removeAll(USet* set, const USet* removeSet); /** * Retain only the elements in this set that are contained in the * specified range. If <code>start > end</code> then an empty range is * retained, leaving the set empty. This is equivalent to * a boolean logic AND, or a set INTERSECTION. * A frozen set will not be modified. * * @param set the object for which to retain only the specified range * @param start first character, inclusive, of range * @param end last character, inclusive, of range * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_retain(USet* set, UChar32 start, UChar32 end); /** * Retains only the specified string from this set if it is present. * Upon return this set will be empty if it did not contain s, or * will only contain s if it did contain s. * A frozen set will not be modified. * * @param set the object to be modified * @param str the string * @param length the length of the string, or -1 if NUL-terminated * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_retainString(USet *set, const UChar *str, int32_t length); /** * Retains EACH of the characters in this string. Note: "ch" == {"c", "h"} * A frozen set will not be modified. * * @param set the object to be modified * @param str the string * @param length the length of the string, or -1 if NUL-terminated * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_retainAllCodePoints(USet *set, const UChar *str, int32_t length); /** * Retains only the elements in this set that are contained in the * specified set. In other words, removes from this set all of * its elements that are not contained in the specified set. This * operation effectively modifies this set so that its value is * the <i>intersection</i> of the two sets. * A frozen set will not be modified. * * @param set the object on which to perform the retain * @param retain set that defines which elements this set will retain * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_retainAll(USet* set, const USet* retain); /** * Reallocate this objects internal structures to take up the least * possible space, without changing this object's value. * A frozen set will not be modified. * * @param set the object on which to perform the compact * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_compact(USet* set); /** * This is equivalent to * <code>uset_complementRange(set, 0, 0x10FFFF)</code>. * * <strong>Note:</strong> This performs a symmetric difference with all code points * <em>and thus retains all multicharacter strings</em>. * In order to achieve a “code point complement” (all code points minus this set), * the easiest is to <code>uset_complement(set); uset_removeAllStrings(set);</code>. * * A frozen set will not be modified. * @param set the set * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_complement(USet* set); /** * Complements the specified range in this set. Any character in * the range will be removed if it is in this set, or will be * added if it is not in this set. If <code>start > end</code> * then an empty range is complemented, leaving the set unchanged. * This is equivalent to a boolean logic XOR. * A frozen set will not be modified. * * @param set the object to be modified * @param start first character, inclusive, of range * @param end last character, inclusive, of range * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_complementRange(USet *set, UChar32 start, UChar32 end); /** * Complements the specified string in this set. * The string will be removed if it is in this set, or will be added if it is not in this set. * A frozen set will not be modified. * * @param set the object to be modified * @param str the string * @param length the length of the string, or -1 if NUL-terminated * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_complementString(USet *set, const UChar *str, int32_t length); /** * Complements EACH of the characters in this string. Note: "ch" == {"c", "h"} * A frozen set will not be modified. * * @param set the object to be modified * @param str the string * @param length the length of the string, or -1 if NUL-terminated * @stable ICU 69 */ U_CAPI void U_EXPORT2 uset_complementAllCodePoints(USet *set, const UChar *str, int32_t length); /** * Complements in this set all elements contained in the specified * set. Any character in the other set will be removed if it is * in this set, or will be added if it is not in this set. * A frozen set will not be modified. * * @param set the set with which to complement * @param complement set that defines which elements will be xor'ed * from this set. * @stable ICU 3.2 */ U_CAPI void U_EXPORT2 uset_complementAll(USet* set, const USet* complement); /** * Removes all of the elements from this set. This set will be * empty after this call returns. * A frozen set will not be modified. * @param set the set * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_clear(USet* set); /** * Close this set over the given attribute. For the attribute * USET_CASE_INSENSITIVE, the result is to modify this set so that: * * 1. For each character or string 'a' in this set, all strings or * characters 'b' such that foldCase(a) == foldCase(b) are added * to this set. * * 2. For each string 'e' in the resulting set, if e != * foldCase(e), 'e' will be removed. * * Example: [aq\\u00DF{Bc}{bC}{Fi}] => [aAqQ\\u00DF\\uFB01{ss}{bc}{fi}] * * (Here foldCase(x) refers to the operation u_strFoldCase, and a * == b denotes that the contents are the same, not pointer * comparison.) * * A frozen set will not be modified. * * @param set the set * * @param attributes bitmask for attributes to close over. * Valid options: * At most one of USET_CASE_INSENSITIVE, USET_ADD_CASE_MAPPINGS, USET_SIMPLE_CASE_INSENSITIVE. * These case options are mutually exclusive. * Unrelated options bits are ignored. * @stable ICU 4.2 */ U_CAPI void U_EXPORT2 uset_closeOver(USet* set, int32_t attributes); /** * Remove all strings from this set. * * @param set the set * @stable ICU 4.2 */ U_CAPI void U_EXPORT2 uset_removeAllStrings(USet* set); /** * Returns true if the given USet contains no characters and no * strings. * @param set the set * @return true if set is empty * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_isEmpty(const USet* set); /** * @param set the set * @return true if this set contains multi-character strings or the empty string. * @stable ICU 70 */ U_CAPI UBool U_EXPORT2 uset_hasStrings(const USet *set); /** * Returns true if the given USet contains the given character. * This function works faster with a frozen set. * @param set the set * @param c The codepoint to check for within the set * @return true if set contains c * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_contains(const USet* set, UChar32 c); /** * Returns true if the given USet contains all characters c * where start <= c && c <= end. * @param set the set * @param start the first character of the range to test, inclusive * @param end the last character of the range to test, inclusive * @return true if set contains the range * @stable ICU 2.2 */ U_CAPI UBool U_EXPORT2 uset_containsRange(const USet* set, UChar32 start, UChar32 end); /** * Returns true if the given USet contains the given string. * @param set the set * @param str the string * @param strLen the length of the string or -1 if null terminated. * @return true if set contains str * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_containsString(const USet* set, const UChar* str, int32_t strLen); /** * Returns the index of the given character within this set, where * the set is ordered by ascending code point. If the character * is not in this set, return -1. The inverse of this method is * <code>charAt()</code>. * @param set the set * @param c the character to obtain the index for * @return an index from 0..size()-1, or -1 * @stable ICU 3.2 */ U_CAPI int32_t U_EXPORT2 uset_indexOf(const USet* set, UChar32 c); /** * Returns the character at the given index within this set, where * the set is ordered by ascending code point. If the index is * out of range for characters, returns (UChar32)-1. * The inverse of this method is <code>indexOf()</code>. * * For iteration, this is slower than uset_getRangeCount()/uset_getItemCount() * with uset_getItem(), because for each call it skips linearly over <code>index</code> * characters in the ranges. * * @param set the set * @param charIndex an index from 0..size()-1 to obtain the char for * @return the character at the given index, or (UChar32)-1. * @stable ICU 3.2 */ U_CAPI UChar32 U_EXPORT2 uset_charAt(const USet* set, int32_t charIndex); /** * Returns the number of characters and strings contained in this set. * The last (uset_getItemCount() - uset_getRangeCount()) items are strings. * * This is slower than uset_getRangeCount() and uset_getItemCount() because * it counts the code points of all ranges. * * @param set the set * @return a non-negative integer counting the characters and strings * contained in set * @stable ICU 2.4 * @see uset_getRangeCount */ U_CAPI int32_t U_EXPORT2 uset_size(const USet* set); /** * @param set the set * @return the number of ranges in this set. * @stable ICU 70 * @see uset_getItemCount * @see uset_getItem * @see uset_size */ U_CAPI int32_t U_EXPORT2 uset_getRangeCount(const USet *set); /** * Returns the number of items in this set. An item is either a range * of characters or a single multicharacter string. * @param set the set * @return a non-negative integer counting the character ranges * and/or strings contained in set * @stable ICU 2.4 */ U_CAPI int32_t U_EXPORT2 uset_getItemCount(const USet* set); /** * Returns an item of this set. An item is either a range of * characters or a single multicharacter string (which can be the empty string). * * If <code>itemIndex</code> is less than uset_getRangeCount(), then this function returns 0, * and the range is <code>*start</code>..<code>*end</code>. * * If <code>itemIndex</code> is at least uset_getRangeCount() and less than uset_getItemCount(), then * this function copies the string into <code>str[strCapacity]</code> and * returns the length of the string (0 for the empty string). * * If <code>itemIndex</code> is out of range, then this function returns -1. * * Note that 0 is returned for each range as well as for the empty string. * * @param set the set * @param itemIndex a non-negative integer in the range 0..uset_getItemCount(set)-1 * @param start pointer to variable to receive first character in range, inclusive; * can be NULL for a string item * @param end pointer to variable to receive last character in range, inclusive; * can be NULL for a string item * @param str buffer to receive the string, may be NULL * @param strCapacity capacity of str, or 0 if str is NULL * @param ec error code; U_INDEX_OUTOFBOUNDS_ERROR if the itemIndex is out of range * @return the length of the string (0 or >= 2), or 0 if the item is a range, * or -1 if the itemIndex is out of range * @stable ICU 2.4 */ U_CAPI int32_t U_EXPORT2 uset_getItem(const USet* set, int32_t itemIndex, UChar32* start, UChar32* end, UChar* str, int32_t strCapacity, UErrorCode* ec); /** * Returns true if set1 contains all the characters and strings * of set2. It answers the question, 'Is set1 a superset of set2?' * @param set1 set to be checked for containment * @param set2 set to be checked for containment * @return true if the test condition is met * @stable ICU 3.2 */ U_CAPI UBool U_EXPORT2 uset_containsAll(const USet* set1, const USet* set2); /** * Returns true if this set contains all the characters * of the given string. This is does not check containment of grapheme * clusters, like uset_containsString. * @param set set of characters to be checked for containment * @param str string containing codepoints to be checked for containment * @param strLen the length of the string or -1 if null terminated. * @return true if the test condition is met * @stable ICU 3.4 */ U_CAPI UBool U_EXPORT2 uset_containsAllCodePoints(const USet* set, const UChar *str, int32_t strLen); /** * Returns true if set1 contains none of the characters and strings * of set2. It answers the question, 'Is set1 a disjoint set of set2?' * @param set1 set to be checked for containment * @param set2 set to be checked for containment * @return true if the test condition is met * @stable ICU 3.2 */ U_CAPI UBool U_EXPORT2 uset_containsNone(const USet* set1, const USet* set2); /** * Returns true if set1 contains some of the characters and strings * of set2. It answers the question, 'Does set1 and set2 have an intersection?' * @param set1 set to be checked for containment * @param set2 set to be checked for containment * @return true if the test condition is met * @stable ICU 3.2 */ U_CAPI UBool U_EXPORT2 uset_containsSome(const USet* set1, const USet* set2); /** * Returns the length of the initial substring of the input string which * consists only of characters and strings that are contained in this set * (USET_SPAN_CONTAINED, USET_SPAN_SIMPLE), * or only of characters and strings that are not contained * in this set (USET_SPAN_NOT_CONTAINED). * See USetSpanCondition for details. * Similar to the strspn() C library function. * Unpaired surrogates are treated according to contains() of their surrogate code points. * This function works faster with a frozen set and with a non-negative string length argument. * @param set the set * @param s start of the string * @param length of the string; can be -1 for NUL-terminated * @param spanCondition specifies the containment condition * @return the length of the initial substring according to the spanCondition; * 0 if the start of the string does not fit the spanCondition * @stable ICU 3.8 * @see USetSpanCondition */ U_CAPI int32_t U_EXPORT2 uset_span(const USet *set, const UChar *s, int32_t length, USetSpanCondition spanCondition); /** * Returns the start of the trailing substring of the input string which * consists only of characters and strings that are contained in this set * (USET_SPAN_CONTAINED, USET_SPAN_SIMPLE), * or only of characters and strings that are not contained * in this set (USET_SPAN_NOT_CONTAINED). * See USetSpanCondition for details. * Unpaired surrogates are treated according to contains() of their surrogate code points. * This function works faster with a frozen set and with a non-negative string length argument. * @param set the set * @param s start of the string * @param length of the string; can be -1 for NUL-terminated * @param spanCondition specifies the containment condition * @return the start of the trailing substring according to the spanCondition; * the string length if the end of the string does not fit the spanCondition * @stable ICU 3.8 * @see USetSpanCondition */ U_CAPI int32_t U_EXPORT2 uset_spanBack(const USet *set, const UChar *s, int32_t length, USetSpanCondition spanCondition); /** * Returns the length of the initial substring of the input string which * consists only of characters and strings that are contained in this set * (USET_SPAN_CONTAINED, USET_SPAN_SIMPLE), * or only of characters and strings that are not contained * in this set (USET_SPAN_NOT_CONTAINED). * See USetSpanCondition for details. * Similar to the strspn() C library function. * Malformed byte sequences are treated according to contains(0xfffd). * This function works faster with a frozen set and with a non-negative string length argument. * @param set the set * @param s start of the string (UTF-8) * @param length of the string; can be -1 for NUL-terminated * @param spanCondition specifies the containment condition * @return the length of the initial substring according to the spanCondition; * 0 if the start of the string does not fit the spanCondition * @stable ICU 3.8 * @see USetSpanCondition */ U_CAPI int32_t U_EXPORT2 uset_spanUTF8(const USet *set, const char *s, int32_t length, USetSpanCondition spanCondition); /** * Returns the start of the trailing substring of the input string which * consists only of characters and strings that are contained in this set * (USET_SPAN_CONTAINED, USET_SPAN_SIMPLE), * or only of characters and strings that are not contained * in this set (USET_SPAN_NOT_CONTAINED). * See USetSpanCondition for details. * Malformed byte sequences are treated according to contains(0xfffd). * This function works faster with a frozen set and with a non-negative string length argument. * @param set the set * @param s start of the string (UTF-8) * @param length of the string; can be -1 for NUL-terminated * @param spanCondition specifies the containment condition * @return the start of the trailing substring according to the spanCondition; * the string length if the end of the string does not fit the spanCondition * @stable ICU 3.8 * @see USetSpanCondition */ U_CAPI int32_t U_EXPORT2 uset_spanBackUTF8(const USet *set, const char *s, int32_t length, USetSpanCondition spanCondition); /** * Returns true if set1 contains all of the characters and strings * of set2, and vis versa. It answers the question, 'Is set1 equal to set2?' * @param set1 set to be checked for containment * @param set2 set to be checked for containment * @return true if the test condition is met * @stable ICU 3.2 */ U_CAPI UBool U_EXPORT2 uset_equals(const USet* set1, const USet* set2); /********************************************************************* * Serialized set API *********************************************************************/ /** * Serializes this set into an array of 16-bit integers. Serialization * (currently) only records the characters in the set; multicharacter * strings are ignored. * * The array * has following format (each line is one 16-bit integer): * * length = (n+2*m) | (m!=0?0x8000:0) * bmpLength = n; present if m!=0 * bmp[0] * bmp[1] * ... * bmp[n-1] * supp-high[0] * supp-low[0] * supp-high[1] * supp-low[1] * ... * supp-high[m-1] * supp-low[m-1] * * The array starts with a header. After the header are n bmp * code points, then m supplementary code points. Either n or m * or both may be zero. n+2*m is always <= 0x7FFF. * * If there are no supplementary characters (if m==0) then the * header is one 16-bit integer, 'length', with value n. * * If there are supplementary characters (if m!=0) then the header * is two 16-bit integers. The first, 'length', has value * (n+2*m)|0x8000. The second, 'bmpLength', has value n. * * After the header the code points are stored in ascending order. * Supplementary code points are stored as most significant 16 * bits followed by least significant 16 bits. * * @param set the set * @param dest pointer to buffer of destCapacity 16-bit integers. * May be NULL only if destCapacity is zero. * @param destCapacity size of dest, or zero. Must not be negative. * @param pErrorCode pointer to the error code. Will be set to * U_INDEX_OUTOFBOUNDS_ERROR if n+2*m > 0x7FFF. Will be set to * U_BUFFER_OVERFLOW_ERROR if n+2*m+(m!=0?2:1) > destCapacity. * @return the total length of the serialized format, including * the header, that is, n+2*m+(m!=0?2:1), or 0 on error other * than U_BUFFER_OVERFLOW_ERROR. * @stable ICU 2.4 */ U_CAPI int32_t U_EXPORT2 uset_serialize(const USet* set, uint16_t* dest, int32_t destCapacity, UErrorCode* pErrorCode); /** * Given a serialized array, fill in the given serialized set object. * @param fillSet pointer to result * @param src pointer to start of array * @param srcLength length of array * @return true if the given array is valid, otherwise false * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_getSerializedSet(USerializedSet* fillSet, const uint16_t* src, int32_t srcLength); /** * Set the USerializedSet to contain the given character (and nothing * else). * @param fillSet pointer to result * @param c The codepoint to set * @stable ICU 2.4 */ U_CAPI void U_EXPORT2 uset_setSerializedToOne(USerializedSet* fillSet, UChar32 c); /** * Returns true if the given USerializedSet contains the given * character. * @param set the serialized set * @param c The codepoint to check for within the set * @return true if set contains c * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_serializedContains(const USerializedSet* set, UChar32 c); /** * Returns the number of disjoint ranges of characters contained in * the given serialized set. Ignores any strings contained in the * set. * @param set the serialized set * @return a non-negative integer counting the character ranges * contained in set * @stable ICU 2.4 */ U_CAPI int32_t U_EXPORT2 uset_getSerializedRangeCount(const USerializedSet* set); /** * Returns a range of characters contained in the given serialized * set. * @param set the serialized set * @param rangeIndex a non-negative integer in the range 0.. * uset_getSerializedRangeCount(set)-1 * @param pStart pointer to variable to receive first character * in range, inclusive * @param pEnd pointer to variable to receive last character in range, * inclusive * @return true if rangeIndex is valid, otherwise false * @stable ICU 2.4 */ U_CAPI UBool U_EXPORT2 uset_getSerializedRange(const USerializedSet* set, int32_t rangeIndex, UChar32* pStart, UChar32* pEnd); #endif
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