1781 lines
66 KiB
C++
1781 lines
66 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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***************************************************************************
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* Copyright (C) 1999-2016, International Business Machines Corporation
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* and others. All Rights Reserved.
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***************************************************************************
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* Date Name Description
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* 10/20/99 alan Creation.
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***************************************************************************
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*/
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#ifndef UNICODESET_H
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#define UNICODESET_H
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#include "unicode/utypes.h"
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#if U_SHOW_CPLUSPLUS_API
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#include "unicode/ucpmap.h"
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#include "unicode/unifilt.h"
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#include "unicode/unistr.h"
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#include "unicode/uset.h"
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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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U_NAMESPACE_BEGIN
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// Forward Declarations.
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class BMPSet;
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class ParsePosition;
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class RBBIRuleScanner;
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class SymbolTable;
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class UnicodeSetStringSpan;
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class UVector;
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class RuleCharacterIterator;
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/**
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* A mutable set of Unicode characters and multicharacter strings. Objects of this class
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* represent <em>character classes</em> used in regular expressions.
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* A character specifies a subset of Unicode code points. Legal
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* code points are U+0000 to U+10FFFF, inclusive.
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*
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* <p>The UnicodeSet class is not designed to be subclassed.
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*
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* <p><code>UnicodeSet</code> supports two APIs. The first is the
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* <em>operand</em> API that allows the caller to modify the value of
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* a <code>UnicodeSet</code> object. It conforms to Java 2's
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* <code>java.util.Set</code> interface, although
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* <code>UnicodeSet</code> does not actually implement that
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* interface. All methods of <code>Set</code> are supported, with the
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* modification that they take a character range or single character
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* instead of an <code>Object</code>, and they take a
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* <code>UnicodeSet</code> instead of a <code>Collection</code>. The
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* operand API may be thought of in terms of boolean logic: a boolean
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* OR is implemented by <code>add</code>, a boolean AND is implemented
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* by <code>retain</code>, a boolean XOR is implemented by
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* <code>complement</code> taking an argument, and a boolean NOT is
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* implemented by <code>complement</code> with no argument. In terms
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* of traditional set theory function names, <code>add</code> is a
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* union, <code>retain</code> is an intersection, <code>remove</code>
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* is an asymmetric difference, and <code>complement</code> with no
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* argument is a set complement with respect to the superset range
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* <code>MIN_VALUE-MAX_VALUE</code>
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*
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* <p>The second API is the
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* <code>applyPattern()</code>/<code>toPattern()</code> API from the
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* <code>java.text.Format</code>-derived classes. Unlike the
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* methods that add characters, add categories, and control the logic
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* of the set, the method <code>applyPattern()</code> sets all
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* attributes of a <code>UnicodeSet</code> at once, based on a
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* string pattern.
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*
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* <p><b>Pattern syntax</b></p>
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*
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* Patterns are accepted by the constructors and the
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* <code>applyPattern()</code> methods and returned by the
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* <code>toPattern()</code> method. These patterns follow a syntax
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* similar to that employed by version 8 regular expression character
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* classes. Here are some simple examples:
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*
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* \htmlonly<blockquote>\endhtmlonly
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* <table>
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* <tr align="top">
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* <td nowrap valign="top" align="left"><code>[]</code></td>
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* <td valign="top">No characters</td>
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* </tr><tr align="top">
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* <td nowrap valign="top" align="left"><code>[a]</code></td>
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* <td valign="top">The character 'a'</td>
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* </tr><tr align="top">
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* <td nowrap valign="top" align="left"><code>[ae]</code></td>
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* <td valign="top">The characters 'a' and 'e'</td>
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* </tr>
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* <tr>
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* <td nowrap valign="top" align="left"><code>[a-e]</code></td>
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* <td valign="top">The characters 'a' through 'e' inclusive, in Unicode code
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* point order</td>
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* </tr>
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* <tr>
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* <td nowrap valign="top" align="left"><code>[\\u4E01]</code></td>
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* <td valign="top">The character U+4E01</td>
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* </tr>
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* <tr>
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* <td nowrap valign="top" align="left"><code>[a{ab}{ac}]</code></td>
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* <td valign="top">The character 'a' and the multicharacter strings "ab" and
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* "ac"</td>
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* </tr>
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* <tr>
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* <td nowrap valign="top" align="left"><code>[\\p{Lu}]</code></td>
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* <td valign="top">All characters in the general category Uppercase Letter</td>
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* </tr>
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* </table>
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* \htmlonly</blockquote>\endhtmlonly
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*
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* Any character may be preceded by a backslash in order to remove any special
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* meaning. White space characters, as defined by UCharacter.isWhitespace(), are
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* ignored, unless they are escaped.
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*
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* <p>Property patterns specify a set of characters having a certain
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* property as defined by the Unicode standard. Both the POSIX-like
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* "[:Lu:]" and the Perl-like syntax "\\p{Lu}" are recognized. For a
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* complete list of supported property patterns, see the User's Guide
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* for UnicodeSet at
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* <a href="https://unicode-org.github.io/icu/userguide/strings/unicodeset">
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* https://unicode-org.github.io/icu/userguide/strings/unicodeset</a>.
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* Actual determination of property data is defined by the underlying
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* Unicode database as implemented by UCharacter.
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*
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* <p>Patterns specify individual characters, ranges of characters, and
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* Unicode property sets. When elements are concatenated, they
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* specify their union. To complement a set, place a '^' immediately
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* after the opening '['. Property patterns are inverted by modifying
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* their delimiters; "[:^foo]" and "\\P{foo}". In any other location,
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* '^' has no special meaning.
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*
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* <p>Since ICU 70, "[^...]", "[:^foo]", "\\P{foo}", and "[:binaryProperty=No:]"
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* perform a “code point complement” (all code points minus the original set),
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* removing all multicharacter strings,
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* equivalent to <code>.complement().removeAllStrings()</code>.
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* The complement() API function continues to perform a
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* symmetric difference with all code points and thus retains all multicharacter strings.
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*
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* <p>Ranges are indicated by placing two a '-' between two
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* characters, as in "a-z". This specifies the range of all
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* characters from the left to the right, in Unicode order. If the
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* left character is greater than or equal to the
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* right character it is a syntax error. If a '-' occurs as the first
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* character after the opening '[' or '[^', or if it occurs as the
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* last character before the closing ']', then it is taken as a
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* literal. Thus "[a\-b]", "[-ab]", and "[ab-]" all indicate the same
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* set of three characters, 'a', 'b', and '-'.
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*
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* <p>Sets may be intersected using the '&' operator or the asymmetric
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* set difference may be taken using the '-' operator, for example,
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* "[[:L:]&[\\u0000-\\u0FFF]]" indicates the set of all Unicode letters
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* with values less than 4096. Operators ('&' and '|') have equal
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* precedence and bind left-to-right. Thus
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* "[[:L:]-[a-z]-[\\u0100-\\u01FF]]" is equivalent to
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* "[[[:L:]-[a-z]]-[\\u0100-\\u01FF]]". This only really matters for
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* difference; intersection is commutative.
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*
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* <table>
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* <tr valign=top><td nowrap><code>[a]</code><td>The set containing 'a'
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* <tr valign=top><td nowrap><code>[a-z]</code><td>The set containing 'a'
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* through 'z' and all letters in between, in Unicode order
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* <tr valign=top><td nowrap><code>[^a-z]</code><td>The set containing
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* all characters but 'a' through 'z',
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* that is, U+0000 through 'a'-1 and 'z'+1 through U+10FFFF
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* <tr valign=top><td nowrap><code>[[<em>pat1</em>][<em>pat2</em>]]</code>
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* <td>The union of sets specified by <em>pat1</em> and <em>pat2</em>
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* <tr valign=top><td nowrap><code>[[<em>pat1</em>]&[<em>pat2</em>]]</code>
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* <td>The intersection of sets specified by <em>pat1</em> and <em>pat2</em>
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* <tr valign=top><td nowrap><code>[[<em>pat1</em>]-[<em>pat2</em>]]</code>
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* <td>The asymmetric difference of sets specified by <em>pat1</em> and
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* <em>pat2</em>
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* <tr valign=top><td nowrap><code>[:Lu:] or \\p{Lu}</code>
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* <td>The set of characters having the specified
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* Unicode property; in
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* this case, Unicode uppercase letters
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* <tr valign=top><td nowrap><code>[:^Lu:] or \\P{Lu}</code>
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* <td>The set of characters <em>not</em> having the given
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* Unicode property
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* </table>
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*
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* <p><b>Formal syntax</b></p>
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*
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* \htmlonly<blockquote>\endhtmlonly
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* <table>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>pattern := </code></td>
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* <td valign="top"><code>('[' '^'? item* ']') |
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* property</code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>item := </code></td>
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* <td valign="top"><code>char | (char '-' char) | pattern-expr<br>
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* </code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>pattern-expr := </code></td>
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* <td valign="top"><code>pattern | pattern-expr pattern |
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* pattern-expr op pattern<br>
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* </code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>op := </code></td>
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* <td valign="top"><code>'&' | '-'<br>
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* </code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>special := </code></td>
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* <td valign="top"><code>'[' | ']' | '-'<br>
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* </code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>char := </code></td>
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* <td valign="top"><em>any character that is not</em><code> special<br>
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* | ('\' </code><em>any character</em><code>)<br>
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* | ('\\u' hex hex hex hex)<br>
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* </code></td>
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* </tr>
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* <tr align="top">
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* <td nowrap valign="top" align="right"><code>hex := </code></td>
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* <td valign="top"><code>'0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' |<br>
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* 'A' | 'B' | 'C' | 'D' | 'E' | 'F' | 'a' | 'b' | 'c' | 'd' | 'e' | 'f'</code></td>
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* </tr>
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* <tr>
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* <td nowrap valign="top" align="right"><code>property := </code></td>
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* <td valign="top"><em>a Unicode property set pattern</em></td>
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* </tr>
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* </table>
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* <br>
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* <table border="1">
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* <tr>
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* <td>Legend: <table>
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* <tr>
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* <td nowrap valign="top"><code>a := b</code></td>
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* <td width="20" valign="top"> </td>
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* <td valign="top"><code>a</code> may be replaced by <code>b</code> </td>
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* </tr>
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* <tr>
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* <td nowrap valign="top"><code>a?</code></td>
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* <td valign="top"></td>
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* <td valign="top">zero or one instance of <code>a</code><br>
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* </td>
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* </tr>
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* <tr>
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* <td nowrap valign="top"><code>a*</code></td>
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* <td valign="top"></td>
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* <td valign="top">one or more instances of <code>a</code><br>
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* </td>
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* </tr>
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* <tr>
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* <td nowrap valign="top"><code>a | b</code></td>
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* <td valign="top"></td>
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* <td valign="top">either <code>a</code> or <code>b</code><br>
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* </td>
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* </tr>
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* <tr>
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* <td nowrap valign="top"><code>'a'</code></td>
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* <td valign="top"></td>
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* <td valign="top">the literal string between the quotes </td>
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* </tr>
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* </table>
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* </td>
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* </tr>
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* </table>
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* \htmlonly</blockquote>\endhtmlonly
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*
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* <p>Note:
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* - Most UnicodeSet methods do not take a UErrorCode parameter because
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* there are usually very few opportunities for failure other than a shortage
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* of memory, error codes in low-level C++ string methods would be inconvenient,
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* and the error code as the last parameter (ICU convention) would prevent
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* the use of default parameter values.
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* Instead, such methods set the UnicodeSet into a "bogus" state
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* (see isBogus()) if an error occurs.
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*
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* @author Alan Liu
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* @stable ICU 2.0
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*/
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class U_COMMON_API UnicodeSet U_FINAL : public UnicodeFilter {
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private:
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/**
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* Enough for sets with few ranges.
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* For example, White_Space has 10 ranges, list length 21.
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*/
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static constexpr int32_t INITIAL_CAPACITY = 25;
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// fFlags constant
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static constexpr uint8_t kIsBogus = 1; // This set is bogus (i.e. not valid)
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UChar32* list = stackList; // MUST be terminated with HIGH
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int32_t capacity = INITIAL_CAPACITY; // capacity of list
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int32_t len = 1; // length of list used; 1 <= len <= capacity
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uint8_t fFlags = 0; // Bit flag (see constants above)
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BMPSet *bmpSet = nullptr; // The set is frozen iff either bmpSet or stringSpan is not NULL.
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UChar32* buffer = nullptr; // internal buffer, may be NULL
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int32_t bufferCapacity = 0; // capacity of buffer
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/**
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* The pattern representation of this set. This may not be the
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* most economical pattern. It is the pattern supplied to
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* applyPattern(), with variables substituted and whitespace
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* removed. For sets constructed without applyPattern(), or
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* modified using the non-pattern API, this string will be empty,
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* indicating that toPattern() must generate a pattern
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* representation from the inversion list.
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*/
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char16_t *pat = nullptr;
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int32_t patLen = 0;
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UVector* strings = nullptr; // maintained in sorted order
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UnicodeSetStringSpan *stringSpan = nullptr;
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/**
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* Initial list array.
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* Avoids some heap allocations, and list is never nullptr.
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* Increases the object size a bit.
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*/
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UChar32 stackList[INITIAL_CAPACITY];
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public:
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/**
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* Determine if this object contains a valid set.
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* A bogus set has no value. It is different from an empty set.
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* It can be used to indicate that no set value is available.
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*
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* @return true if the set is bogus/invalid, false otherwise
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* @see setToBogus()
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* @stable ICU 4.0
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*/
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inline UBool isBogus(void) const;
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/**
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* Make this UnicodeSet object invalid.
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* The string will test true with isBogus().
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*
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* A bogus set has no value. It is different from an empty set.
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* It can be used to indicate that no set value is available.
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*
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* This utility function is used throughout the UnicodeSet
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* implementation to indicate that a UnicodeSet operation failed,
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* and may be used in other functions,
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* especially but not exclusively when such functions do not
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* take a UErrorCode for simplicity.
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*
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* @see isBogus()
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* @stable ICU 4.0
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*/
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void setToBogus();
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public:
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enum {
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/**
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* Minimum value that can be stored in a UnicodeSet.
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* @stable ICU 2.4
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*/
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MIN_VALUE = 0,
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/**
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* Maximum value that can be stored in a UnicodeSet.
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* @stable ICU 2.4
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*/
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MAX_VALUE = 0x10ffff
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};
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//----------------------------------------------------------------
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// Constructors &c
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//----------------------------------------------------------------
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public:
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/**
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* Constructs an empty set.
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* @stable ICU 2.0
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*/
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UnicodeSet();
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/**
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* Constructs a set containing the given range. If <code>end <
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* start</code> then an empty set is created.
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*
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* @param start first character, inclusive, of range
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* @param end last character, inclusive, of range
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* @stable ICU 2.4
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*/
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UnicodeSet(UChar32 start, UChar32 end);
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#ifndef U_HIDE_INTERNAL_API
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/**
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* @internal
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*/
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enum ESerialization {
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kSerialized /* result of serialize() */
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};
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/**
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* Constructs a set from the output of serialize().
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*
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* @param buffer the 16 bit array
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* @param bufferLen the original length returned from serialize()
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* @param serialization the value 'kSerialized'
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* @param status error code
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*
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* @internal
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*/
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UnicodeSet(const uint16_t buffer[], int32_t bufferLen,
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ESerialization serialization, UErrorCode &status);
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#endif /* U_HIDE_INTERNAL_API */
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/**
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* Constructs a set from the given pattern. See the 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 status returns <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the pattern
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* contains a syntax error.
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* @stable ICU 2.0
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*/
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UnicodeSet(const UnicodeString& pattern,
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UErrorCode& status);
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#ifndef U_HIDE_INTERNAL_API
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/**
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* Constructs a set from the given pattern. See the 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 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 symbols a symbol table mapping variable names to values
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* and stand-in characters to UnicodeSets; may be NULL
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* @param status returns <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the pattern
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* contains a syntax error.
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* @internal
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*/
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UnicodeSet(const UnicodeString& pattern,
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uint32_t options,
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const SymbolTable* symbols,
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UErrorCode& status);
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#endif /* U_HIDE_INTERNAL_API */
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/**
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* Constructs a set from the given pattern. See the class description
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* 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 pos on input, the position in pattern at which to start parsing.
|
|
* On output, the position after the last character parsed.
|
|
* @param options bitmask for options to apply to the pattern.
|
|
* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
|
|
* @param symbols a symbol table mapping variable names to values
|
|
* and stand-in characters to UnicodeSets; may be NULL
|
|
* @param status input-output error code
|
|
* @stable ICU 2.8
|
|
*/
|
|
UnicodeSet(const UnicodeString& pattern, ParsePosition& pos,
|
|
uint32_t options,
|
|
const SymbolTable* symbols,
|
|
UErrorCode& status);
|
|
|
|
/**
|
|
* Constructs a set that is identical to the given UnicodeSet.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet(const UnicodeSet& o);
|
|
|
|
/**
|
|
* Destructs the set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual ~UnicodeSet();
|
|
|
|
/**
|
|
* Assigns this object to be a copy of another.
|
|
* A frozen set will not be modified.
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& operator=(const UnicodeSet& o);
|
|
|
|
/**
|
|
* Compares the specified object with this set for equality. Returns
|
|
* <tt>true</tt> if the two sets
|
|
* have the same size, and every member of the specified set is
|
|
* contained in this set (or equivalently, every member of this set is
|
|
* contained in the specified set).
|
|
*
|
|
* @param o set to be compared for equality with this set.
|
|
* @return <tt>true</tt> if the specified set is equal to this set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual bool operator==(const UnicodeSet& o) const;
|
|
|
|
/**
|
|
* Compares the specified object with this set for equality. Returns
|
|
* <tt>true</tt> if the specified set is not equal to this set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline bool operator!=(const UnicodeSet& o) const;
|
|
|
|
/**
|
|
* Returns a copy of this object. All UnicodeFunctor objects have
|
|
* to support cloning in order to allow classes using
|
|
* UnicodeFunctors, such as Transliterator, to implement cloning.
|
|
* If this set is frozen, then the clone will be frozen as well.
|
|
* Use cloneAsThawed() for a mutable clone of a frozen set.
|
|
* @see cloneAsThawed
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet* clone() const override;
|
|
|
|
/**
|
|
* Returns the hash code value for this set.
|
|
*
|
|
* @return the hash code value for this set.
|
|
* @see Object#hashCode()
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual int32_t hashCode(void) const;
|
|
|
|
/**
|
|
* Get a UnicodeSet pointer from a USet
|
|
*
|
|
* @param uset a USet (the ICU plain C type for UnicodeSet)
|
|
* @return the corresponding UnicodeSet pointer.
|
|
*
|
|
* @stable ICU 4.2
|
|
*/
|
|
inline static UnicodeSet *fromUSet(USet *uset);
|
|
|
|
/**
|
|
* Get a UnicodeSet pointer from a const USet
|
|
*
|
|
* @param uset a const USet (the ICU plain C type for UnicodeSet)
|
|
* @return the corresponding UnicodeSet pointer.
|
|
*
|
|
* @stable ICU 4.2
|
|
*/
|
|
inline static const UnicodeSet *fromUSet(const USet *uset);
|
|
|
|
/**
|
|
* Produce a USet * pointer for this UnicodeSet.
|
|
* USet is the plain C type for UnicodeSet
|
|
*
|
|
* @return a USet pointer for this UnicodeSet
|
|
* @stable ICU 4.2
|
|
*/
|
|
inline USet *toUSet();
|
|
|
|
|
|
/**
|
|
* Produce a const USet * pointer for this UnicodeSet.
|
|
* USet is the plain C type for UnicodeSet
|
|
*
|
|
* @return a const USet pointer for this UnicodeSet
|
|
* @stable ICU 4.2
|
|
*/
|
|
inline const USet * toUSet() const;
|
|
|
|
|
|
//----------------------------------------------------------------
|
|
// Freezable API
|
|
//----------------------------------------------------------------
|
|
|
|
/**
|
|
* Determines whether the set has been frozen (made immutable) or not.
|
|
* See the ICU4J Freezable interface for details.
|
|
* @return true/false for whether the set has been frozen
|
|
* @see freeze
|
|
* @see cloneAsThawed
|
|
* @stable ICU 3.8
|
|
*/
|
|
inline UBool isFrozen() const;
|
|
|
|
/**
|
|
* 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
|
|
* contains() and span().
|
|
* A frozen set will not be modified. (It remains frozen.)
|
|
* @return this set.
|
|
* @see isFrozen
|
|
* @see cloneAsThawed
|
|
* @stable ICU 3.8
|
|
*/
|
|
UnicodeSet *freeze();
|
|
|
|
/**
|
|
* Clone the set and make the clone mutable.
|
|
* See the ICU4J Freezable interface for details.
|
|
* @return the mutable clone
|
|
* @see freeze
|
|
* @see isFrozen
|
|
* @stable ICU 3.8
|
|
*/
|
|
UnicodeSet *cloneAsThawed() const;
|
|
|
|
//----------------------------------------------------------------
|
|
// Public API
|
|
//----------------------------------------------------------------
|
|
|
|
/**
|
|
* Make this object represent the range `start - end`.
|
|
* If `start > end` then this object is set to an empty range.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param start first character in the set, inclusive
|
|
* @param end last character in the set, inclusive
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& set(UChar32 start, UChar32 end);
|
|
|
|
/**
|
|
* Return true if the given position, in the given pattern, appears
|
|
* to be the start of a UnicodeSet pattern.
|
|
* @stable ICU 2.4
|
|
*/
|
|
static UBool resemblesPattern(const UnicodeString& pattern,
|
|
int32_t pos);
|
|
|
|
/**
|
|
* Modifies this set to represent the set specified by the given
|
|
* pattern, ignoring Unicode Pattern_White_Space characters.
|
|
* See the class description for the syntax of the pattern language.
|
|
* A frozen set will not be modified.
|
|
* @param pattern a string specifying what characters are in the set
|
|
* @param status returns <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the pattern
|
|
* contains a syntax error.
|
|
* <em> Empties the set passed before applying the pattern.</em>
|
|
* @return a reference to this
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& applyPattern(const UnicodeString& pattern,
|
|
UErrorCode& status);
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/**
|
|
* Modifies this set to represent the set specified by the given
|
|
* pattern, optionally ignoring Unicode Pattern_White_Space characters.
|
|
* See the class description for the syntax of the pattern language.
|
|
* A frozen set will not be modified.
|
|
* @param pattern a string specifying what characters are in the set
|
|
* @param options bitmask for options to apply to the pattern.
|
|
* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
|
|
* @param symbols a symbol table mapping variable names to
|
|
* values and stand-ins to UnicodeSets; may be NULL
|
|
* @param status returns <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the pattern
|
|
* contains a syntax error.
|
|
*<em> Empties the set passed before applying the pattern.</em>
|
|
* @return a reference to this
|
|
* @internal
|
|
*/
|
|
UnicodeSet& applyPattern(const UnicodeString& pattern,
|
|
uint32_t options,
|
|
const SymbolTable* symbols,
|
|
UErrorCode& status);
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
/**
|
|
* Parses the given pattern, starting at the given position. The
|
|
* character at pattern.charAt(pos.getIndex()) must be '[', or the
|
|
* parse fails. Parsing continues until the corresponding closing
|
|
* ']'. If a syntax error is encountered between the opening and
|
|
* closing brace, the parse fails. Upon return from a successful
|
|
* parse, the ParsePosition is updated to point to the character
|
|
* following the closing ']', and a StringBuffer containing a
|
|
* pairs list for the parsed pattern is returned. This method calls
|
|
* itself recursively to parse embedded subpatterns.
|
|
*<em> Empties the set passed before applying the pattern.</em>
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param pattern the string containing the pattern to be parsed.
|
|
* The portion of the string from pos.getIndex(), which must be a
|
|
* '[', to the corresponding closing ']', is parsed.
|
|
* @param pos upon entry, the position at which to being parsing.
|
|
* The character at pattern.charAt(pos.getIndex()) must be a '['.
|
|
* Upon return from a successful parse, pos.getIndex() is either
|
|
* the character after the closing ']' of the parsed pattern, or
|
|
* pattern.length() if the closing ']' is the last character of
|
|
* the pattern string.
|
|
* @param options bitmask for options to apply to the pattern.
|
|
* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
|
|
* @param symbols a symbol table mapping variable names to
|
|
* values and stand-ins to UnicodeSets; may be NULL
|
|
* @param status returns <code>U_ILLEGAL_ARGUMENT_ERROR</code> if the pattern
|
|
* contains a syntax error.
|
|
* @return a reference to this
|
|
* @stable ICU 2.8
|
|
*/
|
|
UnicodeSet& applyPattern(const UnicodeString& pattern,
|
|
ParsePosition& pos,
|
|
uint32_t options,
|
|
const SymbolTable* symbols,
|
|
UErrorCode& status);
|
|
|
|
/**
|
|
* Returns a string representation of this set. If the result of
|
|
* calling this function is passed to a UnicodeSet constructor, it
|
|
* will produce another set that is equal to this one.
|
|
* A frozen set will not be modified.
|
|
* @param result the string to receive the rules. Previous
|
|
* contents will be deleted.
|
|
* @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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeString& toPattern(UnicodeString& result,
|
|
UBool escapeUnprintable = false) const override;
|
|
|
|
/**
|
|
* Modifies this 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 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
|
|
*
|
|
* @return a reference to this set
|
|
*
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& applyIntPropertyValue(UProperty prop,
|
|
int32_t value,
|
|
UErrorCode& ec);
|
|
|
|
/**
|
|
* Modifies this 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 prop 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 value 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 ec error code input/output parameter
|
|
*
|
|
* @return a reference to this set
|
|
*
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& applyPropertyAlias(const UnicodeString& prop,
|
|
const UnicodeString& value,
|
|
UErrorCode& ec);
|
|
|
|
/**
|
|
* Returns the number of elements in this set (its cardinality).
|
|
* Note than the elements of a set may include both individual
|
|
* codepoints and strings.
|
|
*
|
|
* This is slower than getRangeCount() because
|
|
* it counts the code points of all ranges.
|
|
*
|
|
* @return the number of elements in this set (its cardinality).
|
|
* @stable ICU 2.0
|
|
* @see getRangeCount
|
|
*/
|
|
virtual int32_t size(void) const;
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains no elements.
|
|
*
|
|
* @return <tt>true</tt> if this set contains no elements.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool isEmpty(void) const;
|
|
|
|
/**
|
|
* @return true if this set contains multi-character strings or the empty string.
|
|
* @stable ICU 70
|
|
*/
|
|
UBool hasStrings() const;
|
|
|
|
/**
|
|
* Returns true if this set contains the given character.
|
|
* This function works faster with a frozen set.
|
|
* @param c character to be checked for containment
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool contains(UChar32 c) const override;
|
|
|
|
/**
|
|
* Returns true if this set contains every character
|
|
* of the given range.
|
|
* @param start first character, inclusive, of the range
|
|
* @param end last character, inclusive, of the range
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool contains(UChar32 start, UChar32 end) const;
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains the given
|
|
* multicharacter string.
|
|
* @param s string to be checked for containment
|
|
* @return <tt>true</tt> if this set contains the specified string
|
|
* @stable ICU 2.4
|
|
*/
|
|
UBool contains(const UnicodeString& s) const;
|
|
|
|
/**
|
|
* Returns true if this set contains all the characters and strings
|
|
* of the given set.
|
|
* @param c set to be checked for containment
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UBool containsAll(const UnicodeSet& c) const;
|
|
|
|
/**
|
|
* Returns true if this set contains all the characters
|
|
* of the given string.
|
|
* @param s string containing characters to be checked for containment
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
UBool containsAll(const UnicodeString& s) const;
|
|
|
|
/**
|
|
* Returns true if this set contains none of the characters
|
|
* of the given range.
|
|
* @param start first character, inclusive, of the range
|
|
* @param end last character, inclusive, of the range
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
UBool containsNone(UChar32 start, UChar32 end) const;
|
|
|
|
/**
|
|
* Returns true if this set contains none of the characters and strings
|
|
* of the given set.
|
|
* @param c set to be checked for containment
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
UBool containsNone(const UnicodeSet& c) const;
|
|
|
|
/**
|
|
* Returns true if this set contains none of the characters
|
|
* of the given string.
|
|
* @param s string containing characters to be checked for containment
|
|
* @return true if the test condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
UBool containsNone(const UnicodeString& s) const;
|
|
|
|
/**
|
|
* Returns true if this set contains one or more of the characters
|
|
* in the given range.
|
|
* @param start first character, inclusive, of the range
|
|
* @param end last character, inclusive, of the range
|
|
* @return true if the condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
inline UBool containsSome(UChar32 start, UChar32 end) const;
|
|
|
|
/**
|
|
* Returns true if this set contains one or more of the characters
|
|
* and strings of the given set.
|
|
* @param s The set to be checked for containment
|
|
* @return true if the condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
inline UBool containsSome(const UnicodeSet& s) const;
|
|
|
|
/**
|
|
* Returns true if this set contains one or more of the characters
|
|
* of the given string.
|
|
* @param s string containing characters to be checked for containment
|
|
* @return true if the condition is met
|
|
* @stable ICU 2.4
|
|
*/
|
|
inline UBool containsSome(const UnicodeString& s) const;
|
|
|
|
/**
|
|
* 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 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
|
|
*/
|
|
int32_t span(const char16_t *s, int32_t length, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* Returns the end of the substring of the input string according to the USetSpanCondition.
|
|
* Same as <code>start+span(s.getBuffer()+start, s.length()-start, spanCondition)</code>
|
|
* after pinning start to 0<=start<=s.length().
|
|
* @param s the string
|
|
* @param start the start index in the string for the span operation
|
|
* @param spanCondition specifies the containment condition
|
|
* @return the exclusive end of the substring according to the spanCondition;
|
|
* the substring s.tempSubStringBetween(start, end) fulfills the spanCondition
|
|
* @stable ICU 4.4
|
|
* @see USetSpanCondition
|
|
*/
|
|
inline int32_t span(const UnicodeString &s, int32_t start, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* 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 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
|
|
*/
|
|
int32_t spanBack(const char16_t *s, int32_t length, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* Returns the start of the substring of the input string according to the USetSpanCondition.
|
|
* Same as <code>spanBack(s.getBuffer(), limit, spanCondition)</code>
|
|
* after pinning limit to 0<=end<=s.length().
|
|
* @param s the string
|
|
* @param limit the exclusive-end index in the string for the span operation
|
|
* (use s.length() or INT32_MAX for spanning back from the end of the string)
|
|
* @param spanCondition specifies the containment condition
|
|
* @return the start of the substring according to the spanCondition;
|
|
* the substring s.tempSubStringBetween(start, limit) fulfills the spanCondition
|
|
* @stable ICU 4.4
|
|
* @see USetSpanCondition
|
|
*/
|
|
inline int32_t spanBack(const UnicodeString &s, int32_t limit, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* 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 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
|
|
*/
|
|
int32_t spanUTF8(const char *s, int32_t length, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* 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 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
|
|
*/
|
|
int32_t spanBackUTF8(const char *s, int32_t length, USetSpanCondition spanCondition) const;
|
|
|
|
/**
|
|
* Implement UnicodeMatcher::matches()
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UMatchDegree matches(const Replaceable& text,
|
|
int32_t& offset,
|
|
int32_t limit,
|
|
UBool incremental) override;
|
|
|
|
private:
|
|
/**
|
|
* Returns the longest match for s in text at the given position.
|
|
* If limit > start then match forward from start+1 to limit
|
|
* matching all characters except s.charAt(0). If limit < start,
|
|
* go backward starting from start-1 matching all characters
|
|
* except s.charAt(s.length()-1). This method assumes that the
|
|
* first character, text.charAt(start), matches s, so it does not
|
|
* check it.
|
|
* @param text the text to match
|
|
* @param start the first character to match. In the forward
|
|
* direction, text.charAt(start) is matched against s.charAt(0).
|
|
* In the reverse direction, it is matched against
|
|
* s.charAt(s.length()-1).
|
|
* @param limit the limit offset for matching, either last+1 in
|
|
* the forward direction, or last-1 in the reverse direction,
|
|
* where last is the index of the last character to match.
|
|
* @param s
|
|
* @return If part of s matches up to the limit, return |limit -
|
|
* start|. If all of s matches before reaching the limit, return
|
|
* s.length(). If there is a mismatch between s and text, return
|
|
* 0
|
|
*/
|
|
static int32_t matchRest(const Replaceable& text,
|
|
int32_t start, int32_t limit,
|
|
const UnicodeString& s);
|
|
|
|
/**
|
|
* Returns the smallest value i such that c < list[i]. Caller
|
|
* must ensure that c is a legal value or this method will enter
|
|
* an infinite loop. This method performs a binary search.
|
|
* @param c a character in the range MIN_VALUE..MAX_VALUE
|
|
* inclusive
|
|
* @return the smallest integer i in the range 0..len-1,
|
|
* inclusive, such that c < list[i]
|
|
*/
|
|
int32_t findCodePoint(UChar32 c) const;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Implementation of UnicodeMatcher API. Union the set of all
|
|
* characters that may be matched by this object into the given
|
|
* set.
|
|
* @param toUnionTo the set into which to union the source characters
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual void addMatchSetTo(UnicodeSet& toUnionTo) const override;
|
|
|
|
/**
|
|
* 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>.
|
|
* @return an index from 0..size()-1, or -1
|
|
* @stable ICU 2.4
|
|
*/
|
|
int32_t indexOf(UChar32 c) const;
|
|
|
|
/**
|
|
* Returns the character at the given index within this set, where
|
|
* the set is ordered by ascending code point. If the index is
|
|
* out of range for characters, returns (UChar32)-1.
|
|
* The inverse of this method is <code>indexOf()</code>.
|
|
*
|
|
* For iteration, this is slower than UnicodeSetIterator or
|
|
* getRangeCount()/getRangeStart()/getRangeEnd(),
|
|
* because for each call it skips linearly over <code>index</code>
|
|
* characters in the ranges.
|
|
*
|
|
* @param index an index from 0..size()-1
|
|
* @return the character at the given index, or (UChar32)-1.
|
|
* @stable ICU 2.4
|
|
*/
|
|
UChar32 charAt(int32_t index) const;
|
|
|
|
/**
|
|
* Adds the specified range to this set if it is not already
|
|
* present. If this set already contains the specified range,
|
|
* the call leaves this set unchanged. If <code>start > end</code>
|
|
* then an empty range is added, leaving the set unchanged.
|
|
* This is equivalent to a boolean logic OR, or a set UNION.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param start first character, inclusive, of range to be added
|
|
* to this set.
|
|
* @param end last character, inclusive, of range to be added
|
|
* to this set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& add(UChar32 start, UChar32 end);
|
|
|
|
/**
|
|
* Adds the specified character to this set if it is not already
|
|
* present. If this set already contains the specified character,
|
|
* the call leaves this set unchanged.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param c the character (code point)
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& add(UChar32 c);
|
|
|
|
/**
|
|
* Adds the specified multicharacter to this set if it is not already
|
|
* present. If this set already contains the multicharacter,
|
|
* the call leaves this set unchanged.
|
|
* Thus "ch" => {"ch"}
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& add(const UnicodeString& s);
|
|
|
|
private:
|
|
/**
|
|
* @return a code point IF the string consists of a single one.
|
|
* otherwise returns -1.
|
|
* @param s string to test
|
|
*/
|
|
static int32_t getSingleCP(const UnicodeString& s);
|
|
|
|
void _add(const UnicodeString& s);
|
|
|
|
public:
|
|
/**
|
|
* Adds each of the characters in this string to the set. Note: "ch" => {"c", "h"}
|
|
* If this set already contains any particular character, it has no effect on that character.
|
|
* A frozen set will not be modified.
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& addAll(const UnicodeString& s);
|
|
|
|
/**
|
|
* Retains EACH of the characters in this string. Note: "ch" == {"c", "h"}
|
|
* A frozen set will not be modified.
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& retainAll(const UnicodeString& s);
|
|
|
|
/**
|
|
* Complement EACH of the characters in this string. Note: "ch" == {"c", "h"}
|
|
* A frozen set will not be modified.
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& complementAll(const UnicodeString& s);
|
|
|
|
/**
|
|
* Remove EACH of the characters in this string. Note: "ch" == {"c", "h"}
|
|
* A frozen set will not be modified.
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& removeAll(const UnicodeString& s);
|
|
|
|
/**
|
|
* Makes a set from a multicharacter string. Thus "ch" => {"ch"}
|
|
*
|
|
* @param s the source string
|
|
* @return a newly created set containing the given string.
|
|
* The caller owns the return object and is responsible for deleting it.
|
|
* @stable ICU 2.4
|
|
*/
|
|
static UnicodeSet* U_EXPORT2 createFrom(const UnicodeString& s);
|
|
|
|
|
|
/**
|
|
* Makes a set from each of the characters in the string. Thus "ch" => {"c", "h"}
|
|
* @param s the source string
|
|
* @return a newly created set containing the given characters
|
|
* The caller owns the return object and is responsible for deleting it.
|
|
* @stable ICU 2.4
|
|
*/
|
|
static UnicodeSet* U_EXPORT2 createFromAll(const UnicodeString& s);
|
|
|
|
/**
|
|
* 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 start first character, inclusive, of range
|
|
* @param end last character, inclusive, of range
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& retain(UChar32 start, UChar32 end);
|
|
|
|
|
|
/**
|
|
* Retain the specified character from this set if it is present.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param c the character (code point)
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& retain(UChar32 c);
|
|
|
|
/**
|
|
* Retains only the specified string from this set if it is present.
|
|
* Upon return this set will be empty if it did not contain s, or
|
|
* will only contain s if it did contain s.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 69
|
|
*/
|
|
UnicodeSet& retain(const UnicodeString &s);
|
|
|
|
/**
|
|
* Removes the specified range from this set if it is present.
|
|
* The set will not contain the specified range once the call
|
|
* returns. If <code>start > end</code> then an empty range is
|
|
* removed, leaving the set unchanged.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param start first character, inclusive, of range to be removed
|
|
* from this set.
|
|
* @param end last character, inclusive, of range to be removed
|
|
* from this set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& remove(UChar32 start, UChar32 end);
|
|
|
|
/**
|
|
* Removes the specified character from this set if it is present.
|
|
* The set will not contain the specified range once the call
|
|
* returns.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param c the character (code point)
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& remove(UChar32 c);
|
|
|
|
/**
|
|
* Removes the specified string from this set if it is present.
|
|
* The set will not contain the specified character once the call
|
|
* returns.
|
|
* A frozen set will not be modified.
|
|
* @param s the source string
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& remove(const UnicodeString& s);
|
|
|
|
/**
|
|
* This is equivalent to
|
|
* <code>complement(MIN_VALUE, MAX_VALUE)</code>.
|
|
*
|
|
* <strong>Note:</strong> This performs a symmetric difference with all code points
|
|
* <em>and thus retains all multicharacter strings</em>.
|
|
* In order to achieve a “code point complement” (all code points minus this set),
|
|
* the easiest is to <code>.complement().removeAllStrings()</code>.
|
|
*
|
|
* A frozen set will not be modified.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& complement();
|
|
|
|
/**
|
|
* Complements the specified range in this set. Any character in
|
|
* the range will be removed if it is in this set, or will be
|
|
* added if it is not in this set. If <code>start > end</code>
|
|
* then an empty range is complemented, leaving the set unchanged.
|
|
* This is equivalent to a boolean logic XOR.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param start first character, inclusive, of range
|
|
* @param end last character, inclusive, of range
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& complement(UChar32 start, UChar32 end);
|
|
|
|
/**
|
|
* Complements the specified character in this set. The character
|
|
* 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 c the character (code point)
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.0
|
|
*/
|
|
UnicodeSet& complement(UChar32 c);
|
|
|
|
/**
|
|
* Complement the specified string in this set.
|
|
* The string will be removed if it is in this set, or will be added if it is not in this set.
|
|
* A frozen set will not be modified.
|
|
*
|
|
* @param s the string to complement
|
|
* @return this object, for chaining
|
|
* @stable ICU 2.4
|
|
*/
|
|
UnicodeSet& complement(const UnicodeString& s);
|
|
|
|
/**
|
|
* 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 c set whose elements are to be added to this set.
|
|
* @see #add(UChar32, UChar32)
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& addAll(const UnicodeSet& c);
|
|
|
|
/**
|
|
* 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 c set that defines which elements this set will retain.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& retainAll(const UnicodeSet& c);
|
|
|
|
/**
|
|
* 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 c set that defines which elements will be removed from
|
|
* this set.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& removeAll(const UnicodeSet& c);
|
|
|
|
/**
|
|
* 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 c set that defines which elements will be xor'ed from
|
|
* this set.
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UnicodeSet& complementAll(const UnicodeSet& c);
|
|
|
|
/**
|
|
* Removes all of the elements from this set. This set will be
|
|
* empty after this call returns.
|
|
* A frozen set will not be modified.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UnicodeSet& clear(void);
|
|
|
|
/**
|
|
* 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 attribute bitmask for attributes to close over.
|
|
* Currently only the USET_CASE bit is supported. Any undefined bits
|
|
* are ignored.
|
|
* @return a reference to this set.
|
|
* @stable ICU 4.2
|
|
*/
|
|
UnicodeSet& closeOver(int32_t attribute);
|
|
|
|
/**
|
|
* Remove all strings from this set.
|
|
*
|
|
* @return a reference to this set.
|
|
* @stable ICU 4.2
|
|
*/
|
|
virtual UnicodeSet &removeAllStrings();
|
|
|
|
/**
|
|
* Iteration method that returns the number of ranges contained in
|
|
* this set.
|
|
* @see #getRangeStart
|
|
* @see #getRangeEnd
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual int32_t getRangeCount(void) const;
|
|
|
|
/**
|
|
* Iteration method that returns the first character in the
|
|
* specified range of this set.
|
|
* @see #getRangeCount
|
|
* @see #getRangeEnd
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UChar32 getRangeStart(int32_t index) const;
|
|
|
|
/**
|
|
* Iteration method that returns the last character in the
|
|
* specified range of this set.
|
|
* @see #getRangeStart
|
|
* @see #getRangeEnd
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UChar32 getRangeEnd(int32_t index) const;
|
|
|
|
/**
|
|
* 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 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 ec 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
|
|
*/
|
|
int32_t serialize(uint16_t *dest, int32_t destCapacity, UErrorCode& ec) const;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UnicodeSet& compact();
|
|
|
|
/**
|
|
* Return the class ID for this class. This is useful only for
|
|
* comparing to a return value from getDynamicClassID(). For example:
|
|
* <pre>
|
|
* . Base* polymorphic_pointer = createPolymorphicObject();
|
|
* . if (polymorphic_pointer->getDynamicClassID() ==
|
|
* . Derived::getStaticClassID()) ...
|
|
* </pre>
|
|
* @return The class ID for all objects of this class.
|
|
* @stable ICU 2.0
|
|
*/
|
|
static UClassID U_EXPORT2 getStaticClassID(void);
|
|
|
|
/**
|
|
* Implement UnicodeFunctor API.
|
|
*
|
|
* @return The class ID for this object. All objects of a given
|
|
* class have the same class ID. Objects of other classes have
|
|
* different class IDs.
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const override;
|
|
|
|
private:
|
|
|
|
// Private API for the USet API
|
|
|
|
friend class USetAccess;
|
|
|
|
const UnicodeString* getString(int32_t index) const;
|
|
|
|
//----------------------------------------------------------------
|
|
// RuleBasedTransliterator support
|
|
//----------------------------------------------------------------
|
|
|
|
private:
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains any character whose low byte
|
|
* is the given value. This is used by <tt>RuleBasedTransliterator</tt> for
|
|
* indexing.
|
|
*/
|
|
virtual UBool matchesIndexValue(uint8_t v) const override;
|
|
|
|
private:
|
|
friend class RBBIRuleScanner;
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Clone as thawed (see ICU4J Freezable)
|
|
//----------------------------------------------------------------
|
|
|
|
UnicodeSet(const UnicodeSet& o, UBool /* asThawed */);
|
|
UnicodeSet& copyFrom(const UnicodeSet& o, UBool asThawed);
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Pattern parsing
|
|
//----------------------------------------------------------------
|
|
|
|
void applyPatternIgnoreSpace(const UnicodeString& pattern,
|
|
ParsePosition& pos,
|
|
const SymbolTable* symbols,
|
|
UErrorCode& status);
|
|
|
|
void applyPattern(RuleCharacterIterator& chars,
|
|
const SymbolTable* symbols,
|
|
UnicodeString& rebuiltPat,
|
|
uint32_t options,
|
|
UnicodeSet& (UnicodeSet::*caseClosure)(int32_t attribute),
|
|
int32_t depth,
|
|
UErrorCode& ec);
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Utility methods
|
|
//----------------------------------------------------------------
|
|
|
|
static int32_t nextCapacity(int32_t minCapacity);
|
|
|
|
bool ensureCapacity(int32_t newLen);
|
|
|
|
bool ensureBufferCapacity(int32_t newLen);
|
|
|
|
void swapBuffers(void);
|
|
|
|
UBool allocateStrings(UErrorCode &status);
|
|
int32_t stringsSize() const;
|
|
UBool stringsContains(const UnicodeString &s) const;
|
|
|
|
UnicodeString& _toPattern(UnicodeString& result,
|
|
UBool escapeUnprintable) const;
|
|
|
|
UnicodeString& _generatePattern(UnicodeString& result,
|
|
UBool escapeUnprintable) const;
|
|
|
|
static void _appendToPat(UnicodeString& buf, const UnicodeString& s, UBool escapeUnprintable);
|
|
|
|
static void _appendToPat(UnicodeString& buf, UChar32 c, UBool escapeUnprintable);
|
|
|
|
static void _appendToPat(UnicodeString &result, UChar32 start, UChar32 end,
|
|
UBool escapeUnprintable);
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Fundamental operators
|
|
//----------------------------------------------------------------
|
|
|
|
void exclusiveOr(const UChar32* other, int32_t otherLen, int8_t polarity);
|
|
|
|
void add(const UChar32* other, int32_t otherLen, int8_t polarity);
|
|
|
|
void retain(const UChar32* other, int32_t otherLen, int8_t polarity);
|
|
|
|
/**
|
|
* Return true if the given position, in the given pattern, appears
|
|
* to be the start of a property set pattern [:foo:], \\p{foo}, or
|
|
* \\P{foo}, or \\N{name}.
|
|
*/
|
|
static UBool resemblesPropertyPattern(const UnicodeString& pattern,
|
|
int32_t pos);
|
|
|
|
static UBool resemblesPropertyPattern(RuleCharacterIterator& chars,
|
|
int32_t iterOpts);
|
|
|
|
/**
|
|
* Parse the given property pattern at the given parse position
|
|
* and set this UnicodeSet to the result.
|
|
*
|
|
* The original design document is out of date, but still useful.
|
|
* Ignore the property and value names:
|
|
* https://htmlpreview.github.io/?https://github.com/unicode-org/icu-docs/blob/main/design/unicodeset_properties.html
|
|
*
|
|
* Recognized syntax:
|
|
*
|
|
* [:foo:] [:^foo:] - white space not allowed within "[:" or ":]"
|
|
* \\p{foo} \\P{foo} - white space not allowed within "\\p" or "\\P"
|
|
* \\N{name} - white space not allowed within "\\N"
|
|
*
|
|
* Other than the above restrictions, Unicode Pattern_White_Space characters are ignored.
|
|
* Case is ignored except in "\\p" and "\\P" and "\\N". In 'name' leading
|
|
* and trailing space is deleted, and internal runs of whitespace
|
|
* are collapsed to a single space.
|
|
*
|
|
* We support binary properties, enumerated properties, and the
|
|
* following non-enumerated properties:
|
|
*
|
|
* Numeric_Value
|
|
* Name
|
|
* Unicode_1_Name
|
|
*
|
|
* @param pattern the pattern string
|
|
* @param ppos on entry, the position at which to begin parsing.
|
|
* This should be one of the locations marked '^':
|
|
*
|
|
* [:blah:] \\p{blah} \\P{blah} \\N{name}
|
|
* ^ % ^ % ^ % ^ %
|
|
*
|
|
* On return, the position after the last character parsed, that is,
|
|
* the locations marked '%'. If the parse fails, ppos is returned
|
|
* unchanged.
|
|
* @param ec status
|
|
* @return a reference to this.
|
|
*/
|
|
UnicodeSet& applyPropertyPattern(const UnicodeString& pattern,
|
|
ParsePosition& ppos,
|
|
UErrorCode &ec);
|
|
|
|
void applyPropertyPattern(RuleCharacterIterator& chars,
|
|
UnicodeString& rebuiltPat,
|
|
UErrorCode& ec);
|
|
|
|
/**
|
|
* A filter that returns true if the given code point should be
|
|
* included in the UnicodeSet being constructed.
|
|
*/
|
|
typedef UBool (*Filter)(UChar32 codePoint, void* context);
|
|
|
|
/**
|
|
* Given a filter, set this UnicodeSet to the code points
|
|
* contained by that filter. The filter MUST be
|
|
* property-conformant. That is, if it returns value v for one
|
|
* code point, then it must return v for all affiliated code
|
|
* points, as defined by the inclusions list. See
|
|
* getInclusions().
|
|
* src is a UPropertySource value.
|
|
*/
|
|
void applyFilter(Filter filter,
|
|
void* context,
|
|
const UnicodeSet* inclusions,
|
|
UErrorCode &status);
|
|
|
|
/**
|
|
* Set the new pattern to cache.
|
|
*/
|
|
void setPattern(const UnicodeString& newPat) {
|
|
setPattern(newPat.getBuffer(), newPat.length());
|
|
}
|
|
void setPattern(const char16_t *newPat, int32_t newPatLen);
|
|
/**
|
|
* Release existing cached pattern.
|
|
*/
|
|
void releasePattern();
|
|
|
|
friend class UnicodeSetIterator;
|
|
};
|
|
|
|
|
|
|
|
inline bool UnicodeSet::operator!=(const UnicodeSet& o) const {
|
|
return !operator==(o);
|
|
}
|
|
|
|
inline UBool UnicodeSet::isFrozen() const {
|
|
return (UBool)(bmpSet!=NULL || stringSpan!=NULL);
|
|
}
|
|
|
|
inline UBool UnicodeSet::containsSome(UChar32 start, UChar32 end) const {
|
|
return !containsNone(start, end);
|
|
}
|
|
|
|
inline UBool UnicodeSet::containsSome(const UnicodeSet& s) const {
|
|
return !containsNone(s);
|
|
}
|
|
|
|
inline UBool UnicodeSet::containsSome(const UnicodeString& s) const {
|
|
return !containsNone(s);
|
|
}
|
|
|
|
inline UBool UnicodeSet::isBogus() const {
|
|
return (UBool)(fFlags & kIsBogus);
|
|
}
|
|
|
|
inline UnicodeSet *UnicodeSet::fromUSet(USet *uset) {
|
|
return reinterpret_cast<UnicodeSet *>(uset);
|
|
}
|
|
|
|
inline const UnicodeSet *UnicodeSet::fromUSet(const USet *uset) {
|
|
return reinterpret_cast<const UnicodeSet *>(uset);
|
|
}
|
|
|
|
inline USet *UnicodeSet::toUSet() {
|
|
return reinterpret_cast<USet *>(this);
|
|
}
|
|
|
|
inline const USet *UnicodeSet::toUSet() const {
|
|
return reinterpret_cast<const USet *>(this);
|
|
}
|
|
|
|
inline int32_t UnicodeSet::span(const UnicodeString &s, int32_t start, USetSpanCondition spanCondition) const {
|
|
int32_t sLength=s.length();
|
|
if(start<0) {
|
|
start=0;
|
|
} else if(start>sLength) {
|
|
start=sLength;
|
|
}
|
|
return start+span(s.getBuffer()+start, sLength-start, spanCondition);
|
|
}
|
|
|
|
inline int32_t UnicodeSet::spanBack(const UnicodeString &s, int32_t limit, USetSpanCondition spanCondition) const {
|
|
int32_t sLength=s.length();
|
|
if(limit<0) {
|
|
limit=0;
|
|
} else if(limit>sLength) {
|
|
limit=sLength;
|
|
}
|
|
return spanBack(s.getBuffer(), limit, spanCondition);
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* U_SHOW_CPLUSPLUS_API */
|
|
|
|
#endif
|