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788 lines
36 KiB
C++
788 lines
36 KiB
C++
/*
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*****************************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright Taligent, Inc., 1996 *
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* (C) Copyright International Business Machines Corporation, 1996 *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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*****************************************************************************************
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*/
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//===============================================================================
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//
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// File tblcoll.h
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//
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//
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//
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// Created by: Helena Shih
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//
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// Modification History:
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//
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// Date Name Description
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// 2/5/97 aliu Added streamIn and streamOut methods. Added
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// constructor which reads RuleBasedCollator object from
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// a binary file. Added writeToFile method which streams
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// RuleBasedCollator out to a binary file. The streamIn
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// and streamOut methods use istream and ostream objects
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// in binary mode.
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// 2/12/97 aliu Modified to use TableCollationData sub-object to
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// hold invariant data.
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// 2/13/97 aliu Moved several methods into this class from Collation.
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// Added a private RuleBasedCollator(Locale&) constructor,
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// to be used by Collator::createDefault(). General
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// clean up.
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// 2/20/97 helena Added clone, operator==, operator!=, operator=, and copy
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// constructor and getDynamicClassID.
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// 3/5/97 aliu Modified constructFromFile() to add parameter
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// specifying whether or not binary loading is to be
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// attempted. This is required for dynamic rule loading.
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// 05/07/97 helena Added memory allocation error detection.
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// 6/17/97 helena Added IDENTICAL strength for compare, changed getRules to
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// use MergeCollation::getPattern.
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// 6/20/97 helena Java class name change.
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// 8/18/97 helena Added internal API documentation.
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// 09/03/97 helena Added createCollationKeyValues().
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// 02/10/98 damiba Added compare with "length" parameter
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//===============================================================================
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#ifndef _TBLCOLL
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#define _TBLCOLL
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#ifndef _PTYPES
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#include "ptypes.h"
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#endif
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#ifndef _COLL
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#include "coll.h"
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#endif
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#ifndef _UNISTRING
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#include "unistring.h"
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#endif
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#ifndef _SORTKEY
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#include "sortkey.h"
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#endif
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#include <stdio.h>
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class CompactIntArray;
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class VectorOfPToContractElement;
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class VectorOfInt;
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class VectorOfPToContractTable;
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class VectorOfPToExpandTable;
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class MergeCollation;
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class CollationElementIterator;
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/**
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* The RuleBasedCollator class provides the simple implementation of Collator,
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* using data-driven tables. The user can create a customized table-based
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* collation.
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* <P>
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* RuleBasedCollator maps characters to collation keys.
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* <p>
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* Table Collation has the following restrictions for efficiency (other
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* subclasses may be used for more complex languages) :
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* <p>1. If the French secondary ordering is specified in a collation object,
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* it is applied to the whole object.
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* <p>2. All non-mentioned Unicode characters are at the end of the
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* collation order.
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* <p>3. Private use characters are treated as identical. The private
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* use area in Unicode is 0xE800-0xF8FF.
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* <p>The collation table is composed of a list of collation rules, where each
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* rule is of three forms:
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* <pre>
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* . < modifier >
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* . < relation > < text-argument >
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* . < reset > < text-argument >
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* </pre>
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* The following demonstrates how to create your own collation rules:
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* <UL Type=round>
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* <LI><strong>Text Argument</strong>: A text argument is any sequence of
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* characters, excluding special characters (that is, whitespace
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* characters and the characters used in modifier, relation and reset).
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* If those characters are desired, you can put them in single quotes
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* (e.g. ampersand => '&').<P>
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* <LI><strong>Modifier</strong>: There is a single modifier,
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* which is used to specify that all secondary differences are
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* sorted backwards.
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* <p>'@' : Indicates that secondary differences, such as accents, are
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* sorted backwards, as in French.<P>
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* <LI><strong>Relation</strong>: The relations are the following:
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* <UL Type=square>
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* <LI>'<' : Greater, as a letter difference (primary)
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* <LI>';' : Greater, as an accent difference (secondary)
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* <LI>',' : Greater, as a case difference (tertiary)
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* <LI>'=' : Equal
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* </UL><P>
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* <LI><strong>Reset</strong>: There is a single reset,
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* which is used primarily for contractions and expansions, but which
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* can also be used to add a modification at the end of a set of rules.
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* <p>'&' : Indicates that the next rule follows the position to where
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* the reset text-argument would be sorted.
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*
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* <P>Note : The ASCII punctuation characters 0x0020..0x002F, 0x003A..0x0040,
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* 0x005B..0x0060, 0x007B..0x007E are reserved for use in the syntax for
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* building patterns. That is these all have to be quoted if they occur
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* as literals.
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* <p>
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* This sounds more complicated than it is in practice. For example, the
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* following are equivalent ways of expressing the same thing:
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* <pre>
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* . a < b < c
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* . a < b & b < c
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* . a < c & a < b
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* </pre>
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* Notice that the order is important, as the subsequent item goes immediately
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* after the text-argument. The following are not equivalent:
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* <pre>
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* . a < b & a < c
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* . a < c & a < b
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* </pre>
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* Either the text-argument must already be present in the sequence, or some
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* initial substring of the text-argument must be present. (e.g. "a < b & ae <
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* e" is valid since "a" is present in the sequence before "ae" is reset). In
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* this latter case, "ae" is not entered and treated as a single character;
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* instead, "e" is sorted as if it were expanded to two characters: "a"
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* followed by an "e". This difference appears in natural languages: in
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* traditional Spanish "ch" is treated as though it contracts to a single
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* character (expressed as "c < ch < d"), while in traditional German "<22>"
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* (a-umlaut) is treated as though it expands to two characters (expressed as
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* "a & ae ; <20> < b").
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* <p><strong>Ignorable Characters</strong>
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* <p>For ignorable characters, the first rule must start with a relation (the
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* examples we have used above are really fragments; "a < b" really should be
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* "< a < b"). If, however, the first relation is not "<", then all the
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* text-arguments up to the first "<" are ignorable. For example, ", - < a < b"
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* makes "-" an ignorable character, as we saw earlier in the word
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* "black-birds". In the samples for different languages, you see that most
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* accents are ignorable.
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* <p><strong>Normalization and Accents</strong>
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* <p>The Collator object automatically normalizes text internally to separate
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* accents from base characters where possible. This is done both when
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* processing the rules, and when comparing two strings. Collator also uses
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* the Unicode canonical mapping to ensure that combining sequences are sorted
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* properly (for more information, see <A HREF="http://www.aw.com/devpress">
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* The Unicode Standard, Version 2.0</A>.)</P>
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* <p><strong>Errors</strong>
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* <p>The following are errors:
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* <UL Type=round>
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* <LI>A text-argument contains unquoted punctuation symbols
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* (e.g. "a < b-c < d").
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* <LI>A relation or reset character not followed by a text-argument
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* (e.g. "a < , b").
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* <LI>A reset where the text-argument (or an initial substring of the
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* text-argument) is not already in the sequence.
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* (e.g. "a < b & e < f")
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* </UL>
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* If you produce one of these errors, a FormatException will be thrown by
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* RuleBasedCollator.
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* <pre>
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* . Examples:
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* . Simple: "< a < b < c < d"
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* . Norwegian: "< a,A< b,B< c,C< d,D< e,E< f,F< g,G< h,H< i,I< j,J
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* . < k,K< l,L< m,M< n,N< o,O< p,P< q,Q< r,R< s,S< t,T
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* . < u,U< v,V< w,W< x,X< y,Y< z,Z
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* . < <20>=a<>,<2C>=A<>
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* . ;aa,AA< <20>,<2C>< <20>,<2C>"
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* </pre>
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* <p>To create a table-based collation object, simply supply the collation
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* rules to the RuleBasedCollator contructor. For example:
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . RuleBasedCollator *mySimple = new RuleBasedCollator(Simple, status);
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* </pre>
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* <p>Another example:
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . RuleBasedCollator *myNorwegian = new RuleBasedCollator(Norwegian, status);
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* </pre>
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* To add rules on top of an existing table, simply supply the orginal rules
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* and modifications to RuleBasedCollator constructor. For example,
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* <pre>
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* . Traditional Spanish (fragment): ... & C < ch , cH , Ch , CH ...
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* . German (fragment) : ...< y , Y < z , Z
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* . & AE, <20> & AE, <20>
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* . & OE , <20> & OE, <20>
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* . & UE , <20> & UE, <20>
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* . Symbols (fragment): ...< y, Y < z , Z
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* . & Question-mark ; '?'
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* . & Ampersand ; '&'
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* . & Dollar-sign ; '$'
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* <p>To create a collation object for traditional Spanish, the user can take
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* the English collation rules and add the additional rules to the table.
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* For example:
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . UnicodeString rules(DEFAULTRULES);
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* . rules += "& C < ch, cH, Ch, CH";
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* . RuleBasedCollator *mySpanish = new RuleBasedCollator(rules, status);
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* </pre>
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* <p>In order to sort symbols in the similar order of sorting their
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* alphabetic equivalents, you can do the following,
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . UnicodeString rules(DEFAULTRULES);
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* . rules += "& Question-mark ; '?' & Ampersand ; '&' & Dollar-sign ; '$' ";
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* . RuleBasedCollator *myTable = new RuleBasedCollator(rules, status);
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* </pre>
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* <p>Another way of creating the table-based collation object, mySimple,
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* is:
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . RuleBasedCollator *mySimple = new
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* . RuleBasedCollator(" < a < b & b < c & c < d", status);
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* </pre>
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* Or,
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . RuleBasedCollator *mySimple = new
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* . RuleBasedCollator(" < a < b < d & b < c", status);
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* </pre>
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* Because " < a < b < c < d" is the same as "a < b < d & b < c" or
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* "< a < b & b < c & c < d".
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*
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* <p>To combine collations from two locales,
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . // Create an en_US collation object
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* . RuleBasedCollator *en_USCollation = (RuleBasedCollator*)
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* . Collator::createInstance(Locale("en", "US", ""), status);
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* . if (FAILURE(status)) return;
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* . // Create a da_DK collation object
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* . RuleBasedCollator *da_DKCollation = (RuleBasedCollator*)
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* . Collator::getDefault(Locale("da", "DK", ""), status);
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* . if (FAILURE(status)) { delete en_USCollation; return; }
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* . // Combine the two
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* . // First, get the collation rules from en_USCollation
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* . const UnicodeString& en_USRules = en_USCollation->getRules();
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* . // Second, get the collation rules from da_DKCollation
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* . const UnicodeString& da_DKRules = da_DKCollation->getRules();
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* . UnicodeString newRules += en_USRules;
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* . newRules += da_DKRules;
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* . RuleBasedCollator *newCollation = new RuleBasedCollator(newRules, status);
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* . if (FAILURE(status)) { delete en_USCollation; delete da_DKCollation; return; }
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* . // newCollation has the combined rules
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* .
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* </pre>
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* <p>Another more interesting example would be to make changes on an existing
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* table to create a new collation object. For example, add
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* "& C < ch, cH, Ch, CH" to the en_USCollation object to create your own
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* English collation object,
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* <pre>
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* . // Create a new collation object with additional rules
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* . UnicodeString addRules(en_USRules);
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* . addRules += "& C < ch, cH, Ch, CH";
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* .
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* . RuleBasedCollator *myCollation = new RuleBasedCollator(addRules, status);
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* . // myCollation contains the new rules
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* </pre>
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*
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* <p>The following example demonstrates how to change the order of
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* non-spacing accents,
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* <pre>
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* . // old rule
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* . UniChar contents[] = {
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* . '=', 0x0301, ';', 0x0300, ';', 0x0302,
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* . ';', 0x0308, ';', 0x0327; ',', 0x0303, // main accents
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* . ';', 0x0304, ';', 0x0305, ';', 0x0306, // main accents
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* . ';', 0x0307, ';', 0x0309, ';', 0x030A, // main accents
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* . ';', 0x030B, ';', 0x030C, ';', 0x030D, // main accents
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* . ';', 0x030E, ';', 0x030F, ';', 0x0310, // main accents
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* . ';', 0x0311, ';', 0x0312, // main accents
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* . '<', 'a', ',', 'A', ';', 'a', 'e', ',', 'A', 'E',
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* . ';', 0x00e6, ',', 0x00c6, '<', 'b', ',', 'B',
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* . '<', 'c', ',', 'C', '<', 'e', ',', 'E', '&',
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* . 'C', '<', 'd', ',', 'D' };
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* . UnicodeString oldRules(contents);
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* . ErrorCode status = ZERO_ERROR;
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* . // change the order of accent characters
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* . UniChar addOn[] = { '&', ',', 0x0300, ';', 0x0308, ';', 0x0302 };
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* . oldRules += addOn;
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* . RuleBasedCollator *myCollation = new RuleBasedCollator(oldRules, status);
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* </pre>
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*
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* <p> The last example shows how to put new primary ordering in before the
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* default setting. For example, in Japanese collation, you can either sort
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* English characters before or after Japanese characters,
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* <pre>
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* . ErrorCode status = ZERO_ERROR;
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* . // get en_US collation rules
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* . Collator *en_USCollation = Collator::createInstance(Locale::US, status);
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* . // Always check the error code after each call.
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* . if (FAILURE(status)) return;
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* . // add a few Japanese character to sort before English characters
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* . // suppose the last character before the first base letter 'a' in
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* . // the English collation rule is 0x2212
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* . UniChar jaString[] = { '&', 0x2212, '<', 0x3041, ',', 0x3042, '<', 0x3043, ',', 0x3044 };
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* . UnicodeString rules;
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* . rules += en_USCollation->getRules();
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* . rules += jaString;
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* . RuleBasedCollator *myJapaneseCollation = new RuleBasedCollator(rules, status);
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* .
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* </pre>
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* <p><strong>NOTE</strong>: Typically, a collation object is created with
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* Collator::createInstance().
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* @see Collator
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* @version 1.27 4/8/97
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* @author Helena Shih
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*/
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#ifdef NLS_MAC
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#pragma export on
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#endif
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class T_COLLATE_API RuleBasedCollator : public Collator {
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public :
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|
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// constructor/destructor
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/**
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* RuleBasedCollator constructor. This takes the table rules and builds
|
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* a collation table out of them. Please see RuleBasedCollator class
|
||
* description for more details on the collation rule syntax.
|
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* @see Locale
|
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* @param rules the collation rules to build the collation table from.
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||
* @exception FormatException A format exception
|
||
* will be thrown if the build process of the rules fails. For
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||
* example, build rule "a < b c < d" will cause the constructor to
|
||
* throw the FormatException.
|
||
*/
|
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RuleBasedCollator( const UnicodeString& rules,
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ErrorCode& status);
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||
|
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/** Destructor
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*/
|
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virtual ~RuleBasedCollator();
|
||
|
||
/**
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||
* Returns true if "other" is the same as "this".
|
||
*/
|
||
virtual t_bool operator==(const Collator& other) const;
|
||
|
||
/**
|
||
* Returns true if "other" is not the same as "this".
|
||
*/
|
||
virtual t_bool operator!=(const Collator& other) const;
|
||
|
||
/**
|
||
* Makes a shallow copy of the object. The caller owns the returned object.
|
||
* @return the cloned object.
|
||
*/
|
||
virtual Collator* clone() const;
|
||
|
||
/**
|
||
* Fills in the copy of the object.
|
||
*/
|
||
virtual void copy(RuleBasedCollator& copyInto) const;
|
||
|
||
/**
|
||
* Creates a collation element iterator for the source string. The
|
||
* caller of this method is responsible for the memory management of
|
||
* the return pointer.
|
||
* @param source the source string.
|
||
* @return the collation element iterator of the source string using this as
|
||
* the based collator.
|
||
*/
|
||
CollationElementIterator* createCollationElementIterator(const UnicodeString& source) const;
|
||
|
||
/**
|
||
* The following method is obsolete in our current APIs. Some methods
|
||
* were renamed in JDK 1.1. The older versions of the methods will be kept
|
||
* around for compatibility but will be made obsolete in the future.
|
||
*/
|
||
|
||
// From createInstance
|
||
CollationElementIterator* createIterator(const UnicodeString& source) const;
|
||
/**
|
||
* Compares a range of character data stored in two different strings
|
||
* based on the collation rules. Returns
|
||
* information about whether a string is less than, greater than or
|
||
* equal to another string in a language.
|
||
* This can be overriden in a subclass.
|
||
* @param source the source string.
|
||
* @param target the target string to be compared with the source stirng.
|
||
* @return the comparison result. GREATER if the source string is greater
|
||
* than the target string, LESS if the source is less than the target. Otherwise,
|
||
* returns EQUAL.
|
||
*/
|
||
virtual EComparisonResult compare( const UnicodeString& source,
|
||
const UnicodeString& target) const;
|
||
|
||
|
||
//[update Bertrand A. DAMIBA 02/10/98]
|
||
/**
|
||
* Compares a range of character data stored in two different strings
|
||
* based on the collation rules up to the specified length. Returns
|
||
* information about whether a string is less than, greater than or
|
||
* equal to another string in a language.
|
||
* This can be overriden in a subclass.
|
||
* @param source the source string.
|
||
* @param target the target string to be compared with the source string.
|
||
* @param length compares up to the specified length
|
||
* @return the comparison result. GREATER if the source string is greater
|
||
* than the target string, LESS if the source is less than the target. Otherwise,
|
||
* returns EQUAL.
|
||
*/
|
||
virtual EComparisonResult compare( const UnicodeString& source,
|
||
const UnicodeString& target,
|
||
t_int32 length) const;
|
||
|
||
//[end of update Bertrand A. DAMIBA 02/10/98]
|
||
|
||
/** Transforms a specified region of the string into a series of characters
|
||
* that can be compared with CollationKey.compare.
|
||
* This overrides Collator::getCollationKey. It can be overriden
|
||
* in a subclass.
|
||
* @param source the source string.
|
||
* @param key the transformed key of the source string.
|
||
* @param status the error code status.
|
||
* @return the transformed key.
|
||
*/
|
||
virtual CollationKey& getCollationKey( const UnicodeString& source,
|
||
CollationKey& key,
|
||
ErrorCode& status) const;
|
||
/**
|
||
* Transforms the string into a unsigned short array that can be compared,
|
||
* the caller owns the returned array.
|
||
* <p>If the source string is null, a null collation key will be returned.
|
||
* @param source the source string to be transformed into a sort key.
|
||
* @param count returns the number of elements in the returned array.
|
||
* @return the collation key value array of the string based on the collation rules.
|
||
* @see CollationKey#compare
|
||
*/
|
||
virtual UniChar* createCollationKeyValues( const UnicodeString& source,
|
||
t_int32& count,
|
||
ErrorCode& status) const;
|
||
/**
|
||
* Generates the hash code for the rule-based collation object.
|
||
* @return the hash code.
|
||
*/
|
||
virtual t_int32 hashCode() const;
|
||
|
||
/**
|
||
* Gets the table-based rules for the collation object.
|
||
* @return returns the collation rules that the table collation object
|
||
* was created from.
|
||
*/
|
||
const UnicodeString& getRules() const;
|
||
|
||
/**
|
||
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override.
|
||
* This method is to implement a simple version of RTTI, since not all
|
||
* C++ compilers support genuine RTTI. Polymorphic operator==() and
|
||
* clone() methods call this method.
|
||
*
|
||
* @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.
|
||
*/
|
||
virtual ClassID getDynamicClassID() const
|
||
{ return RuleBasedCollator::getStaticClassID(); }
|
||
|
||
|
||
/**
|
||
* Returns the class ID for this class. This is useful only for
|
||
* comparing to a return value from getDynamicClassID(). For example:
|
||
*
|
||
* Base* polymorphic_pointer = createPolymorphicObject();
|
||
* if (polymorphic_pointer->getDynamicClassID() ==
|
||
* Derived::getStaticClassID()) ...
|
||
*
|
||
* @return The class ID for all objects of this class.
|
||
*/
|
||
static ClassID getStaticClassID() { return (ClassID)&fgClassID; }
|
||
|
||
|
||
protected:
|
||
/** Copy constructor
|
||
*/
|
||
RuleBasedCollator(const RuleBasedCollator& other);
|
||
|
||
/**
|
||
* Assignment operator.
|
||
*/
|
||
const RuleBasedCollator& operator=(const RuleBasedCollator& other);
|
||
|
||
/*****************************************************************************
|
||
* PRIVATE
|
||
*****************************************************************************/
|
||
private:
|
||
static char fgClassID;
|
||
friend class CollationElementIterator;
|
||
|
||
// Collator ONLY needs access to RuleBasedCollator(const Locale&, ErrorCode&)
|
||
friend class Collator;
|
||
|
||
// TableCollationData ONLY needs access to UNMAPPED
|
||
friend class TableCollationData;
|
||
|
||
|
||
/** Default constructor
|
||
*/
|
||
RuleBasedCollator();
|
||
|
||
/**
|
||
* Create a table-based collation object with the given rules.
|
||
* @see RuleBasedCollator#RuleBasedCollator
|
||
* @exception FormatException If the rules format is incorrect.
|
||
*/
|
||
void build( const UnicodeString& rules,
|
||
ErrorCode& success);
|
||
|
||
/**
|
||
* Look up for unmapped values in the expanded character table.
|
||
*/
|
||
void commit();
|
||
/**
|
||
* Increment of the last order based on the collation strength.
|
||
* @param s the collation strength.
|
||
* @param lastOrder the last collation order.
|
||
* @return the new collation order.
|
||
*/
|
||
t_int32 increment( Collator::ECollationStrength s,
|
||
t_int32 lastOrder);
|
||
/**
|
||
* Adds a character and its designated order into the collation table.
|
||
* @param ch the Unicode character,
|
||
* @param s the collation strength.
|
||
* @param status the error code status.
|
||
*/
|
||
void addOrder( UniChar ch,
|
||
Collator::ECollationStrength s,
|
||
ErrorCode& status);
|
||
/**
|
||
* Adds the expanding string into the collation table, for example, a-umlaut in German.
|
||
* @param groupChars the contracting characters.
|
||
* @param expChars the expanding characters.
|
||
* @param s the collation strength
|
||
* @param status the error code status.
|
||
*/
|
||
void addExpandOrder(const UnicodeString& groupChars,
|
||
const UnicodeString& expChars,
|
||
Collator::ECollationStrength s,
|
||
ErrorCode& status);
|
||
/**
|
||
* Adds the contracting string into the collation table, for example, ch in Spanish.
|
||
* @param groupChars the contracting characters.
|
||
* @param s the collation strength.
|
||
* @param status the error code status.
|
||
*/
|
||
void addContractOrder(const UnicodeString& groupChars,
|
||
Collator::ECollationStrength s,
|
||
ErrorCode& status);
|
||
/**
|
||
* Gets the entry of list of the contracting string in the collation
|
||
* table.
|
||
* @param ch the starting character of the contracting string
|
||
* @return the entry of contracting element which starts with the specified
|
||
* character in the list of contracting elements.
|
||
*/
|
||
/* changed to getContractValuesFromUniChar to avoid type signature
|
||
clashes on some UNIX platforms. Only happens with NSPR 1.0 <tague>
|
||
*/
|
||
VectorOfPToContractElement*
|
||
getContractValuesFromUniChar( UniChar ch) const;
|
||
/**
|
||
* Ges the entry of list of the contracting string in the collation
|
||
* table.
|
||
* @param n the index of the contract character list
|
||
* @return the entry of the contracting element of the specified index in the
|
||
* list.
|
||
*/
|
||
VectorOfPToContractElement*
|
||
getContractValues( t_int32 index) const;
|
||
/**
|
||
* Gets the entry of list of the expanding string that starts with the specified
|
||
* character in the collation table.
|
||
* @param ch the starting character of the expanding string
|
||
* @return the entry of the expanding-char element which starts with the
|
||
* specified character.
|
||
*/
|
||
VectorOfInt* getExpandValuesFromUniChar( UniChar ch) const;
|
||
/**
|
||
* Gets the entry of value list of the expanding string in the collation
|
||
* table at the specified index.
|
||
* @param idx the index of the expanding string value list
|
||
* @return the entry of the expanding-char element of the specified index in
|
||
* the list.
|
||
*/
|
||
VectorOfInt* getExpandValues( t_int32 index) const;
|
||
/**
|
||
* Gets the comarison order of a character from the collation table.
|
||
* @param ch the Unicode character
|
||
* @return the comparison order of a character.
|
||
*/
|
||
t_int32 getUnicodeOrder( UniChar ch) const;
|
||
|
||
/**
|
||
* Gets the comarison order of a character from the collation table.
|
||
* @param list the contracting element table.
|
||
* @param name the contracting char string.
|
||
* @return the comparison order of the contracting character.
|
||
*/
|
||
t_int32 getEntry( VectorOfPToContractElement* list,
|
||
const UnicodeString& name);
|
||
/**
|
||
* Check for the secondary and tertiary differences of source and
|
||
* target comparison orders.
|
||
* @param sOrder source collation order.
|
||
* @param tOrder target collation order.
|
||
* @param result the current collation result
|
||
* @param s the current collation strength
|
||
* @param skipSecCheck whether to skip the secondary check.
|
||
* @return Collator.LESS if sOrder < tOrder; EQUAL if sOrder == tOrder;
|
||
* Collator.GREATER if sOrder > tOrder.
|
||
*/
|
||
Collator::EComparisonResult
|
||
checkSecTerDiff( t_int32 sOrder,
|
||
t_int32 tOrder,
|
||
Collator::EComparisonResult result,
|
||
Collator::ECollationStrength& s,
|
||
t_bool skipSecCheck = FALSE) const;
|
||
|
||
/**
|
||
* Flattens the given object persistently to a file. The file name
|
||
* argument should be a path name that can be passed directly to the
|
||
* underlying OS. Once a RuleBasedCollator has been written to a file,
|
||
* it can be resurrected by calling the RuleBasedCollator(const char*)
|
||
* constructor, which operates very quickly.
|
||
* @param fileName the output file name.
|
||
* @return TRUE if writing to the file was successful, FALSE otherwise.
|
||
*/
|
||
t_bool writeToFile(const char* fileName) const; // True on success
|
||
|
||
/**
|
||
* Add this table collation to the cache. This involves adding the
|
||
* enclosed TableCollationData to the cache, and then marking our
|
||
* pointer as "not owned" by setting dataIsOwned to false.
|
||
* @param key the unique that represents this collation data object.
|
||
*/
|
||
void addToCache( const UnicodeString& key);
|
||
|
||
/**
|
||
* RuleBasedCollator constructor. This constructor takes a locale. The only
|
||
* caller of this class should be Collator::createDefault(). If createDefault()
|
||
* happens to know that the requested locale's collation is implemented as
|
||
* a RuleBasedCollator, it can then call this constructor. OTHERWISE IT SHOULDN'T,
|
||
* since this constructor ALWAYS RETURNS A VALID COLLATION TABLE. It does this
|
||
* by falling back to defaults.
|
||
*/
|
||
RuleBasedCollator( const Locale& desiredLocale,
|
||
ErrorCode& status);
|
||
/**
|
||
* Internal constructFromXyx() methods. These methods do object construction
|
||
* from various sources. They act like assignment operators; whatever used
|
||
* to be in this object is discarded. <P>FROM RULES. This constructor turns
|
||
* around and calls build(). <P>FROM CACHE. This constructor tries to get the
|
||
* requested cached TableCollationData object, and wrap us around it. <P>FROM FILE.
|
||
* There are two constructors named constructFromFile(). One takes a const char*:
|
||
* this is a path name to be passed directly to the host OS, where a flattened
|
||
* table collation (produced by writeToFile()) resides. The other method takes
|
||
* a Locale, and a UnicodeString locale file name. The distinction is this:
|
||
* the Locale is the locale we are seeking. The file name is the name of the
|
||
* data file (either binary, as produced by writeToFile(), or ASCII, as read
|
||
* by ResourceBundle). Within the file, if it is found, the method will look
|
||
* for the given Locale.
|
||
*/
|
||
void constructFromRules( const UnicodeString& rules,
|
||
ErrorCode& status);
|
||
void constructFromFile( const Locale& locale,
|
||
const UnicodeString& localeFileName,
|
||
t_bool tryBinaryFile,
|
||
ErrorCode& status);
|
||
void constructFromFile( const char* fileName,
|
||
ErrorCode& status);
|
||
void constructFromCache( const UnicodeString& key,
|
||
ErrorCode& status);
|
||
|
||
/**
|
||
* The streamIn and streamOut methods read and write objects of this
|
||
* class as binary, platform-dependent data in the iostream. The stream
|
||
* must be in ios::binary mode for this to work. These methods are not
|
||
* intended for general public use; they are used by the framework to improve
|
||
* performance by storing certain objects in binary files.
|
||
*/
|
||
void streamIn(FILE* is);
|
||
void streamOut(FILE* os) const;
|
||
|
||
//--------------------------------------------------------------------------
|
||
// Internal Static Utility Methods
|
||
/**
|
||
* Creates the path name with given information.
|
||
* @param prefix the prefix of the file name.
|
||
* @param name the actual file name.
|
||
* @param suffix the suffix of the file name.
|
||
* @return the generated file name.
|
||
*/
|
||
static char* createPathName( const UnicodeString& prefix,
|
||
const UnicodeString& name,
|
||
const UnicodeString& suffix);
|
||
|
||
/**
|
||
* Chops off the last portion of the locale name. For example, from "en_US_CA"
|
||
* to "en_US" and "en_US" to "en".
|
||
* @param localeName the locale name.
|
||
*/
|
||
static void chopLocale(UnicodeString& localeName);
|
||
|
||
//--------------------------------------------------------------------------
|
||
// Constants
|
||
|
||
static const t_int32 UNMAPPED;
|
||
static const t_int32 CHARINDEX; // need look up in .commit()
|
||
static const t_int32 EXPANDCHARINDEX; // Expand index follows
|
||
static const t_int32 CONTRACTCHARINDEX; // contract indexes follow
|
||
|
||
static const t_int32 PRIMARYORDERINCREMENT;
|
||
static const t_int32 MAXIGNORABLE;
|
||
static const t_int32 SECONDARYORDERINCREMENT;
|
||
static const t_int32 TERTIARYORDERINCREMENT;
|
||
static const t_int32 PRIMARYORDERMASK;
|
||
static const t_int32 SECONDARYORDERMASK;
|
||
static const t_int32 TERTIARYORDERMASK;
|
||
static const t_int32 SECONDARYRESETMASK;
|
||
static const t_int32 IGNORABLEMASK;
|
||
static const t_int32 PRIMARYDIFFERENCEONLY;
|
||
static const t_int32 SECONDARYDIFFERENCEONLY;
|
||
static const t_int32 PRIMARYORDERSHIFT;
|
||
static const t_int32 SECONDARYORDERSHIFT;
|
||
static const t_int32 SORTKEYOFFSET;
|
||
static const t_int32 CONTRACTCHAROVERFLOW;
|
||
|
||
static const t_int16 FILEID;
|
||
|
||
static UnicodeString DEFAULTRULES;
|
||
|
||
static const char* kFilenameSuffix;
|
||
static const char* kResourceBundleSuffix;
|
||
|
||
static const t_uint32 kCompactionCycle;
|
||
|
||
//--------------------------------------------------------------------------
|
||
// Data Members
|
||
|
||
t_bool isOverIgnore;
|
||
t_int32 currentOrder;
|
||
UniChar lastChar;
|
||
MergeCollation* mPattern;
|
||
UnicodeString sbuffer;
|
||
UnicodeString tbuffer;
|
||
UnicodeString key;
|
||
CollationElementIterator *sourceCursor;
|
||
CollationElementIterator *targetCursor;
|
||
t_bool dataIsOwned;
|
||
TableCollationData* data;
|
||
};
|
||
#ifdef NLS_MAC
|
||
#pragma export off
|
||
#endif
|
||
|
||
inline t_bool
|
||
RuleBasedCollator::operator!=(const Collator& other) const
|
||
{
|
||
return !(*this == other);
|
||
}
|
||
|
||
#endif
|