1056 lines
38 KiB
C
1056 lines
38 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2002-2007, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uset.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2002mar07
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* created by: Markus W. Scherer
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*
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* C version of UnicodeSet.
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*/
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/**
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* \file
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* \brief C API: Unicode Set
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*
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* <p>This is a C wrapper around the C++ UnicodeSet class.</p>
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*/
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#ifndef __USET_H__
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#define __USET_H__
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#include "unicode/utypes.h"
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#include "unicode/uchar.h"
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#ifndef UCNV_H
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struct USet;
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/**
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* A UnicodeSet. Use the uset_* API to manipulate. Create with
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* uset_open*, and destroy with uset_close.
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* @stable ICU 2.4
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*/
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typedef struct USet USet;
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#endif
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/**
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* Bitmask values to be passed to uset_openPatternOptions() or
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* uset_applyPattern() taking an option parameter.
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* @stable ICU 2.4
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*/
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enum {
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/**
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* Ignore white space within patterns unless quoted or escaped.
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* @stable ICU 2.4
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*/
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USET_IGNORE_SPACE = 1,
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/**
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* Enable case insensitive matching. E.g., "[ab]" with this flag
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* will match 'a', 'A', 'b', and 'B'. "[^ab]" with this flag will
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* match all except 'a', 'A', 'b', and 'B'. This performs a full
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* closure over case mappings, e.g. U+017F for s.
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*
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* The resulting set is a superset of the input for the code points but
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* not for the strings.
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* It performs a case mapping closure of the code points and adds
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* full case folding strings for the code points, and reduces strings of
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* the original set to their full case folding equivalents.
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*
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* This is designed for case-insensitive matches, for example
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* in regular expressions. The full code point case closure allows checking of
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* an input character directly against the closure set.
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* Strings are matched by comparing the case-folded form from the closure
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* set with an incremental case folding of the string in question.
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*
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* The closure set will also contain single code points if the original
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* set contained case-equivalent strings (like U+00DF for "ss" or "Ss" etc.).
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* This is not necessary (that is, redundant) for the above matching method
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* but results in the same closure sets regardless of whether the original
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* set contained the code point or a string.
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*
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* @stable ICU 2.4
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*/
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USET_CASE_INSENSITIVE = 2,
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/**
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* Enable case insensitive matching. E.g., "[ab]" with this flag
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* will match 'a', 'A', 'b', and 'B'. "[^ab]" with this flag will
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* match all except 'a', 'A', 'b', and 'B'. This adds the lower-,
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* title-, and uppercase mappings as well as the case folding
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* of each existing element in the set.
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* @stable ICU 3.2
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*/
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USET_ADD_CASE_MAPPINGS = 4,
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/**
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* Enough for any single-code point set
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* @internal
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*/
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USET_SERIALIZED_STATIC_ARRAY_CAPACITY=8
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};
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#ifndef U_HIDE_DRAFT_API
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/**
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* Argument values for whether span() and similar functions continue while
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* the current character is contained vs. not contained in the set.
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*
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* The functionality is straightforward for sets with only single code points,
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* without strings (which is the common case):
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* - USET_SPAN_CONTAINED and USET_SPAN_SIMPLE
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* work the same.
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* - span() and spanBack() partition any string the same way when
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* alternating between span(USET_SPAN_NOT_CONTAINED) and
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* span(either "contained" condition).
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* - Using a complemented (inverted) set and the opposite span conditions
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* yields the same results.
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*
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* When a set contains multi-code point strings, then these statements may not
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* be true, depending on the strings in the set (for example, whether they
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* overlap with each other) and the string that is processed.
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* For a set with strings:
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* - The complement of the set contains the opposite set of code points,
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* but the same set of strings.
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* Therefore, complementing both the set and the span conditions
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* may yield different results.
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* - When starting spans at different positions in a string
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* (span(s, ...) vs. span(s+1, ...)) the ends of the spans may be different
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* because a set string may start before the later position.
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* - span(USET_SPAN_SIMPLE) may be shorter than
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* span(USET_SPAN_CONTAINED) because it will not recursively try
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* all possible paths.
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* For example, with a set which contains the three strings "xy", "xya" and "ax",
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* span("xyax", USET_SPAN_CONTAINED) will return 4 but
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* span("xyax", USET_SPAN_SIMPLE) will return 3.
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* span(USET_SPAN_SIMPLE) will never be longer than
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* span(USET_SPAN_CONTAINED).
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* - With either "contained" condition, span() and spanBack() may partition
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* a string in different ways.
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* For example, with a set which contains the two strings "ab" and "ba",
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* and when processing the string "aba",
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* span() will yield contained/not-contained boundaries of { 0, 2, 3 }
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* while spanBack() will yield boundaries of { 0, 1, 3 }.
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*
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* Note: If it is important to get the same boundaries whether iterating forward
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* or backward through a string, then either only span() should be used and
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* the boundaries cached for backward operation, or an ICU BreakIterator
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* could be used.
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*
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* Note: Unpaired surrogates are treated like surrogate code points.
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* Similarly, set strings match only on code point boundaries,
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* never in the middle of a surrogate pair.
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* Illegal UTF-8 sequences are treated like U+FFFD.
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* When processing UTF-8 strings, malformed set strings
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* (strings with unpaired surrogates which cannot be converted to UTF-8)
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* are ignored.
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*
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* @draft ICU 3.8
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*/
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typedef enum USetSpanCondition {
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/**
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* Continue a span() while there is no set element at the current position.
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* Stops before the first set element (character or string).
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* (For code points only, this is like while contains(current)==FALSE).
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*
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* When span() returns, the substring between where it started and the position
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* it returned consists only of characters that are not in the set,
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* and none of its strings overlap with the span.
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*
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* @draft ICU 3.8
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*/
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USET_SPAN_NOT_CONTAINED = 0,
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/**
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* Continue a span() while there is a set element at the current position.
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* (For characters only, this is like while contains(current)==TRUE).
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*
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* When span() returns, the substring between where it started and the position
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* it returned consists only of set elements (characters or strings) that are in the set.
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*
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* If a set contains strings, then the span will be the longest substring
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* matching any of the possible concatenations of set elements (characters or strings).
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* (There must be a single, non-overlapping concatenation of characters or strings.)
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* This is equivalent to a POSIX regular expression for (OR of each set element)*.
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*
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* @draft ICU 3.8
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*/
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USET_SPAN_CONTAINED = 1,
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/**
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* Continue a span() while there is a set element at the current position.
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* (For characters only, this is like while contains(current)==TRUE).
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*
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* When span() returns, the substring between where it started and the position
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* it returned consists only of set elements (characters or strings) that are in the set.
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*
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* If a set only contains single characters, then this is the same
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* as USET_SPAN_CONTAINED.
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*
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* If a set contains strings, then the span will be the longest substring
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* with a match at each position with the longest single set element (character or string).
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*
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* Use this span condition together with other longest-match algorithms,
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* such as ICU converters (ucnv_getUnicodeSet()).
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*
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* @draft ICU 3.8
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*/
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USET_SPAN_SIMPLE = 2,
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/**
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* One more than the last span condition.
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* @draft ICU 3.8
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*/
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USET_SPAN_CONDITION_COUNT
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} USetSpanCondition;
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#endif /* U_HIDE_DRAFT_API */
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/**
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* A serialized form of a Unicode set. Limited manipulations are
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* possible directly on a serialized set. See below.
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* @stable ICU 2.4
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*/
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typedef struct USerializedSet {
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/**
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* The serialized Unicode Set.
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* @stable ICU 2.4
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*/
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const uint16_t *array;
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/**
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* The length of the array that contains BMP characters.
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* @stable ICU 2.4
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*/
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int32_t bmpLength;
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/**
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* The total length of the array.
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* @stable ICU 2.4
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*/
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int32_t length;
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/**
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* A small buffer for the array to reduce memory allocations.
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* @stable ICU 2.4
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*/
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uint16_t staticArray[USET_SERIALIZED_STATIC_ARRAY_CAPACITY];
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} USerializedSet;
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/*********************************************************************
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* USet API
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*********************************************************************/
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/**
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* Creates a USet object that contains the range of characters
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* start..end, inclusive.
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* @param start first character of the range, inclusive
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* @param end last character of the range, inclusive
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* @return a newly created USet. The caller must call uset_close() on
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* it when done.
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_open(UChar32 start, UChar32 end);
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/**
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* Creates a set from the given pattern. See the UnicodeSet class
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* description for the syntax of the pattern language.
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* @param pattern a string specifying what characters are in the set
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* @param patternLength the length of the pattern, or -1 if null
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* terminated
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* @param ec the error code
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_openPattern(const UChar* pattern, int32_t patternLength,
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UErrorCode* ec);
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/**
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* Creates a set from the given pattern. See the UnicodeSet class
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* description for the syntax of the pattern language.
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* @param pattern a string specifying what characters are in the set
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* @param patternLength the length of the pattern, or -1 if null
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* terminated
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* @param options bitmask for options to apply to the pattern.
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* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
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* @param ec the error code
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_openPatternOptions(const UChar* pattern, int32_t patternLength,
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uint32_t options,
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UErrorCode* ec);
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/**
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* Disposes of the storage used by a USet object. This function should
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* be called exactly once for objects returned by uset_open().
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* @param set the object to dispose of
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_close(USet* set);
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/**
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* Returns a copy of this object.
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* If this set is frozen, then the clone will be frozen as well.
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* Use uset_cloneAsThawed() for a mutable clone of a frozen set.
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* @param set the original set
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* @return the newly allocated copy of the set
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* @see uset_cloneAsThawed
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* @draft ICU 3.8
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*/
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U_DRAFT USet * U_EXPORT2
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uset_clone(const USet *set);
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/**
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* Determines whether the set has been frozen (made immutable) or not.
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* See the ICU4J Freezable interface for details.
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* @param set the set
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* @return TRUE/FALSE for whether the set has been frozen
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* @see uset_freeze
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* @see uset_cloneAsThawed
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* @draft ICU 3.8
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*/
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U_DRAFT UBool U_EXPORT2
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uset_isFrozen(const USet *set);
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/**
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* Freeze the set (make it immutable).
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* Once frozen, it cannot be unfrozen and is therefore thread-safe
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* until it is deleted.
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* See the ICU4J Freezable interface for details.
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* Freezing the set may also make some operations faster, for example
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* uset_contains() and uset_span().
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* A frozen set will not be modified. (It remains frozen.)
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* @param set the set
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* @return the same set, now frozen
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* @see uset_isFrozen
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* @see uset_cloneAsThawed
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* @draft ICU 3.8
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*/
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U_DRAFT void U_EXPORT2
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uset_freeze(USet *set);
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/**
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* Clone the set and make the clone mutable.
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* See the ICU4J Freezable interface for details.
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* @param set the set
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* @return the mutable clone
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* @see uset_freeze
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* @see uset_isFrozen
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* @see uset_clone
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* @draft ICU 3.8
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*/
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U_DRAFT USet * U_EXPORT2
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uset_cloneAsThawed(const USet *set);
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/**
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* Causes the USet object to represent the range <code>start - end</code>.
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* If <code>start > end</code> then this USet is set to an empty range.
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* A frozen set will not be modified.
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* @param set the object to set to the given range
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* @param start first character in the set, inclusive
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* @param end last character in the set, inclusive
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* @stable ICU 3.2
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*/
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U_STABLE void U_EXPORT2
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uset_set(USet* set,
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UChar32 start, UChar32 end);
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/**
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* Modifies the set to represent the set specified by the given
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* pattern. See the UnicodeSet class description for the syntax of
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* the pattern language. See also the User Guide chapter about UnicodeSet.
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* <em>Empties the set passed before applying the pattern.</em>
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* A frozen set will not be modified.
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* @param set The set to which the pattern is to be applied.
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* @param pattern A pointer to UChar string specifying what characters are in the set.
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* The character at pattern[0] must be a '['.
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* @param patternLength The length of the UChar string. -1 if NUL terminated.
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* @param options A bitmask for options to apply to the pattern.
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* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
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* @param status Returns an error if the pattern cannot be parsed.
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* @return Upon successful parse, the value is either
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* the index of the character after the closing ']'
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* of the parsed pattern.
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* If the status code indicates failure, then the return value
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* is the index of the error in the source.
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*
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* @stable ICU 2.8
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*/
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U_STABLE int32_t U_EXPORT2
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uset_applyPattern(USet *set,
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const UChar *pattern, int32_t patternLength,
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uint32_t options,
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UErrorCode *status);
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/**
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* Modifies the set to contain those code points which have the given value
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* for the given binary or enumerated property, as returned by
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* u_getIntPropertyValue. Prior contents of this set are lost.
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* A frozen set will not be modified.
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*
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* @param set the object to contain the code points defined by the property
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*
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* @param prop a property in the range UCHAR_BIN_START..UCHAR_BIN_LIMIT-1
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* or UCHAR_INT_START..UCHAR_INT_LIMIT-1
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* or UCHAR_MASK_START..UCHAR_MASK_LIMIT-1.
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*
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* @param value a value in the range u_getIntPropertyMinValue(prop)..
|
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* u_getIntPropertyMaxValue(prop), with one exception. If prop is
|
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* UCHAR_GENERAL_CATEGORY_MASK, then value should not be a UCharCategory, but
|
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* rather a mask value produced by U_GET_GC_MASK(). This allows grouped
|
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* categories such as [:L:] to be represented.
|
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*
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* @param ec error code input/output parameter
|
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*
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* @stable ICU 3.2
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*/
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U_STABLE void U_EXPORT2
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uset_applyIntPropertyValue(USet* set,
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UProperty prop, int32_t value, UErrorCode* ec);
|
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|
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/**
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* Modifies the set to contain those code points which have the
|
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* given value for the given property. Prior contents of this
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* set are lost.
|
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* A frozen set will not be modified.
|
|
*
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* @param set the object to contain the code points defined by the given
|
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* property and value alias
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|
*
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* @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
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* string is interpreted as either a General_Category value alias, a Script
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* value alias, a binary property alias, or a special ID. Special IDs are
|
|
* matched loosely and correspond to the following sets:
|
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*
|
|
* "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
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|
* 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,
|
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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.
|
|
* @draft ICU 3.4
|
|
*/
|
|
U_DRAFT 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);
|
|
|
|
/**
|
|
* 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 index 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 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 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
|
|
* @draft ICU 3.4
|
|
*/
|
|
U_DRAFT 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
|
|
* @draft 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
|
|
* @draft 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
|
|
* @draft 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
|
|
* @draft 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
|