/* ******************************************************************************* * * Copyright (C) 2002-2004, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: uset.h * encoding: US-ASCII * 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" #ifndef UCNV_H struct USet; /** * A 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. * @stable ICU 2.4 */ enum { /** * Ignore white space within patterns unless quoted or escaped. * @stable ICU 2.4 */ USET_IGNORE_SPACE = 1, /** * Enable case insensitive matching. E.g., "[ab]" with this flag * will match 'a', 'A', 'b', and 'B'. "[^ab]" with this flag will * match all except 'a', 'A', 'b', and 'B'. This performs a full * closure over case mappings, e.g. U+017F for s. * @stable ICU 2.4 */ USET_CASE_INSENSITIVE = 2, /** * Bitmask for UnicodeSet::closeOver() indicating letter case. * This may be ORed together with other selectors. * @internal */ USET_CASE = 2, /** * Enable case insensitive matching. E.g., "[ab]" with this flag * will match 'a', 'A', 'b', and 'B'. "[^ab]" with this flag will * match all except 'a', 'A', 'b', and 'B'. This adds the lower-, * title-, and uppercase mappings as well as the case folding * of each existing element in the set. * @draft ICU 3.2 */ USET_ADD_CASE_MAPPINGS = 4, /** * Enough for any single-code point set * @internal */ USET_SERIALIZED_STATIC_ARRAY_CAPACITY=8 }; /** * A serialized form of a Unicode set. Limited manipulations are * possible directly on a serialized set. See below. * @stable ICU 2.4 */ typedef struct USerializedSet { /** * The serialized Unicode Set. * @stable ICU 2.4 */ const uint16_t *array; /** * The length of the array that contains BMP characters. * @stable ICU 2.4 */ int32_t bmpLength; /** * The total length of the array. * @stable ICU 2.4 */ int32_t length; /** * A small buffer for the array to reduce memory allocations. * @stable ICU 2.4 */ uint16_t staticArray[USET_SERIALIZED_STATIC_ARRAY_CAPACITY]; } USerializedSet; /********************************************************************* * USet API *********************************************************************/ /** * Creates a USet object that contains the range of characters * start..end, inclusive. * @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_STABLE 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_STABLE 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 USET_CASE_INSENSITIVE. * @param ec the error code * @stable ICU 2.4 */ U_STABLE 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_STABLE void U_EXPORT2 uset_close(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. * @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 * @draft ICU 3.2 */ U_DRAFT 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> * @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 USET_CASE_INSENSITIVE. * @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. * * @draft ICU 2.8 */ U_DRAFT 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. * * @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 * * @draft ICU 3.2 */ U_DRAFT 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. * * @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]. * * @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 * * @draft ICU 3.2 */ U_DRAFT 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 * @draft ICU 3.2 */ U_DRAFT 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_STABLE 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. * @param set the object to which to add the character * @param c the character to add * @stable ICU 2.4 */ U_STABLE 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. * * @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_STABLE 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. * @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_STABLE 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. * @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_STABLE void U_EXPORT2 uset_addString(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. * @param set the object from which to remove the character * @param c the character to remove * @stable ICU 2.4 */ U_STABLE 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. * @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_STABLE 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. * @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_STABLE void U_EXPORT2 uset_removeString(USet* set, const UChar* str, int32_t strLen); /** * 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. * @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 * @draft ICU 3.2 */ U_DRAFT 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. * * @param set the object for which to retain only the specified range * @param start first character, inclusive, of range to be retained * to this set. * @param end last character, inclusive, of range to be retained * to this set. * @draft ICU 3.2 */ U_DRAFT void U_EXPORT2 uset_retain(USet* set, UChar32 start, UChar32 end); /** * 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. * * @param set the object on which to perform the retain * @param retain set that defines which elements this set will retain * @draft ICU 3.2 */ U_DRAFT 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. * * @param set the object on which to perfrom the compact * @draft ICU 3.2 */ U_DRAFT void U_EXPORT2 uset_compact(USet* set); /** * Inverts this set. This operation modifies this set so that * its value is its complement. This operation does not affect * the multicharacter strings, if any. * @param set the set * @stable ICU 2.4 */ U_STABLE void U_EXPORT2 uset_complement(USet* set); /** * 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. * * @param set the set with which to complement * @param complement set that defines which elements will be xor'ed * from this set. * @draft ICU 3.2 */ U_DRAFT 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. * @param set the set * @stable ICU 2.4 */ U_STABLE void U_EXPORT2 uset_clear(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_STABLE UBool U_EXPORT2 uset_isEmpty(const USet* set); /** * Returns TRUE if the given USet contains the given character. * @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_STABLE 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_STABLE 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_STABLE 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 * @draft ICU 3.2 */ U_DRAFT 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, return (UChar32)-1. The inverse of this method is * <code>indexOf()</code>. * @param set the set * @param index an index from 0..size()-1 to obtain the char for * @return the character at the given index, or (UChar32)-1. * @draft ICU 3.2 */ U_DRAFT UChar32 U_EXPORT2 uset_charAt(const USet* set, int32_t index); /** * Returns the number of characters and strings contained in the given * USet. * @param set the set * @return a non-negative integer counting the characters and strings * contained in set * @stable ICU 2.4 */ U_STABLE int32_t U_EXPORT2 uset_size(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_STABLE 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. * @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 * @param end pointer to variable to receive last character in range, * inclusive * @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 * @return the length of the string (>= 2), or 0 if the item is a * range, in which case it is the range *start..*end, or -1 if * itemIndex is out of range * @stable ICU 2.4 */ U_STABLE 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 subset 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 * @draft ICU 3.2 */ U_DRAFT UBool U_EXPORT2 uset_containsAll(const USet* set1, const USet* set2); /** * 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 * @draft ICU 3.2 */ U_DRAFT 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 * @draft ICU 3.2 */ U_DRAFT UBool U_EXPORT2 uset_containsSome(const USet* set1, const USet* set2); /** * 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 * @draft ICU 3.2 */ U_DRAFT 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE UBool U_EXPORT2 uset_getSerializedRange(const USerializedSet* set, int32_t rangeIndex, UChar32* pStart, UChar32* pEnd); #endif