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/*
*******************************************************************************
*
* Copyright (C) 2002-2009, 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.
*
* The resulting set is a superset of the input for the code points but
* not for the strings.
* It performs a case mapping closure of the code points and adds
* full case folding strings for the code points, and reduces strings of
* the original set to their full case folding equivalents.
*
* This is designed for case-insensitive matches, for example
* in regular expressions. The full code point case closure allows checking of
* an input character directly against the closure set.
* Strings are matched by comparing the case-folded form from the closure
* set with an incremental case folding of the string in question.
*
* The closure set will also contain single code points if the original
* set contained case-equivalent strings (like U+00DF for "ss" or "Ss" etc.).
* This is not necessary (that is, redundant) for the above matching method
* but results in the same closure sets regardless of whether the original
* set contained the code point or a string.
*
* @stable ICU 2.4
*/
USET_CASE_INSENSITIVE = 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.
* @stable ICU 3.2
*/
USET_ADD_CASE_MAPPINGS = 4,
/**
* Enough for any single-code point set
* @internal
*/
USET_SERIALIZED_STATIC_ARRAY_CAPACITY=8
};
/**
* 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.
* - 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
*/
typedef enum USetSpanCondition {
/**
* Continue a span() while there is no set element at the current position.
* Stops before the first set element (character or string).
* (For code points only, this is like while contains(current)==FALSE).
*
* When span() returns, the substring between where it started and the position
* it returned consists only of characters that are not in the set,
* and none of its strings overlap with the span.
*
* @stable ICU 3.8
*/
USET_SPAN_NOT_CONTAINED = 0,
/**
* Continue a span() while there is a set element at the current position.
* (For characters only, this is like while contains(current)==TRUE).
*
* When span() returns, the substring between where it started and the position
* it returned consists only of set elements (characters or strings) that are in the set.
*
* If a set contains strings, then the span will be the longest substring
* matching any of the possible concatenations of set elements (characters or strings).
* (There must be a single, non-overlapping concatenation of characters or strings.)
* This is equivalent to a POSIX regular expression for (OR of each set element)*.
*
* @stable ICU 3.8
*/
USET_SPAN_CONTAINED = 1,
/**
* Continue a span() while there is a set element at the current position.
* (For characters only, this is like while contains(current)==TRUE).
*
* When span() returns, the substring between where it started and the position
* it returned consists only of set elements (characters or strings) that are in the set.
*
* If a set only contains single characters, then this is the same
* as USET_SPAN_CONTAINED.
*
* If a set contains strings, then the span will be the longest substring
* with a match at each position with the longest single set element (character or string).
*
* Use this span condition together with other longest-match algorithms,
* such as ICU converters (ucnv_getUnicodeSet()).
*
* @stable ICU 3.8
*/
USET_SPAN_SIMPLE = 2,
/**
* One more than the last span condition.
* @stable ICU 3.8
*/
USET_SPAN_CONDITION_COUNT
} USetSpanCondition;
/**
* 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
*********************************************************************/
/**
* 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.
* @draft ICU 4.2
*/
U_DRAFT USet* U_EXPORT2
uset_openEmpty();
/**
* 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_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);
/**
* 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_DRAFT 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_DRAFT 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_DRAFT 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_DRAFT 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_STABLE 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 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.
*
* @stable ICU 2.8
*/
U_STABLE 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_STABLE 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_STABLE 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_STABLE 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.
* 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_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.
* 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_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.
* 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_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.
* 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_STABLE void U_EXPORT2
uset_addString(USet* set, const UChar* str, int32_t strLen);
/**
* Adds each of the characters in this string to the set. Thus "ch" => {"c", "h"}
* If this set already 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_STABLE 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_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.
* 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_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.
* 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_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.
* 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_STABLE 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 to be retained
* to this set.
* @param end last character, inclusive, of range to be retained
* to this set.
* @stable ICU 3.2
*/
U_STABLE 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.
* 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_STABLE 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 perfrom the compact
* @stable ICU 3.2
*/
U_STABLE 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.
* A frozen set will not be modified.
* @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.
* 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_STABLE 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_STABLE void U_EXPORT2
uset_clear(USet* set);
/**
* Close this set over the given attribute. For the attribute
* USET_CASE, 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.
* Currently only the USET_CASE bit is supported. Any undefined bits
* are ignored.
* @draft ICU 4.2
*/
U_DRAFT void U_EXPORT2
uset_closeOver(USet* set, int32_t attributes);
/**
* Remove all strings from this set.
*
* @param set the set
* @draft ICU 4.2
*/
U_DRAFT 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_STABLE UBool U_EXPORT2
uset_isEmpty(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_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
* @stable ICU 3.2
*/
U_STABLE 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 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_STABLE UChar32 U_EXPORT2
uset_charAt(const USet* set, int32_t charIndex);
/**
* 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 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_DRAFT 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_DRAFT 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_DRAFT 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_DRAFT 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_STABLE 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