1589 lines
52 KiB
C++
1589 lines
52 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 1999-2001, International Business Machines
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* Corporation 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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#include "unicode/uniset.h"
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#include "unicode/parsepos.h"
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#include "unicode/unicode.h"
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#include "unicode/uscript.h"
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#include "symtable.h"
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#include "cmemory.h"
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#include "rbt_rule.h"
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#include "umutex.h"
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#include "ucln_in.h"
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#include "upropset.h"
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// HIGH_VALUE > all valid values. 110000 for codepoints
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#define UNICODESET_HIGH 0x0110000
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// LOW <= all valid values. ZERO for codepoints
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#define UNICODESET_LOW 0x000000
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// initial storage. Must be >= 0
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#define START_EXTRA 16
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// extra amount for growth. Must be >= 0
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#define GROW_EXTRA START_EXTRA
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// Define UChar constants using hex for EBCDIC compatibility
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// Used #define to reduce private static exports and memory access time.
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#define SET_OPEN ((UChar)0x005B) /*[*/
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#define SET_CLOSE ((UChar)0x005D) /*]*/
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#define HYPHEN ((UChar)0x002D) /*-*/
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#define COMPLEMENT ((UChar)0x005E) /*^*/
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#define COLON ((UChar)0x003A) /*:*/
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#define BACKSLASH ((UChar)0x005C) /*\*/
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#define INTERSECTION ((UChar)0x0026) /*&*/
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#define UPPER_U ((UChar)0x0055) /*U*/
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#define LOWER_U ((UChar)0x0075) /*u*/
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// TEMPORARY: Remove when deprecated category code constructor is removed.
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static const UChar CATEGORY_NAMES[] = {
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// Must be kept in sync with uchar.h/UCharCategory
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0x43, 0x6E, /* "Cn" */
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0x4C, 0x75, /* "Lu" */
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0x4C, 0x6C, /* "Ll" */
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0x4C, 0x74, /* "Lt" */
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0x4C, 0x6D, /* "Lm" */
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0x4C, 0x6F, /* "Lo" */
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0x4D, 0x6E, /* "Mn" */
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0x4D, 0x65, /* "Me" */
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0x4D, 0x63, /* "Mc" */
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0x4E, 0x64, /* "Nd" */
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0x4E, 0x6C, /* "Nl" */
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0x4E, 0x6F, /* "No" */
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0x5A, 0x73, /* "Zs" */
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0x5A, 0x6C, /* "Zl" */
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0x5A, 0x70, /* "Zp" */
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0x43, 0x63, /* "Cc" */
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0x43, 0x66, /* "Cf" */
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0x43, 0x6F, /* "Co" */
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0x43, 0x73, /* "Cs" */
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0x50, 0x64, /* "Pd" */
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0x50, 0x73, /* "Ps" */
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0x50, 0x65, /* "Pe" */
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0x50, 0x63, /* "Pc" */
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0x50, 0x6F, /* "Po" */
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0x53, 0x6D, /* "Sm" */
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0x53, 0x63, /* "Sc" */
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0x53, 0x6B, /* "Sk" */
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0x53, 0x6F, /* "So" */
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0x50, 0x69, /* "Pi" */
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0x50, 0x66, /* "Pf" */
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0x00
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};
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/**
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* Delimiter string used in patterns to close a category reference:
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* ":]". Example: "[:Lu:]".
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*/
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static const UChar CATEGORY_CLOSE[] = {COLON, SET_CLOSE, 0x0000}; /* ":]" */
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/**
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* Cleanup function for transliterator component; delegates to
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* Transliterator::cleanupRegistry().
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*/
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U_CFUNC UBool unicodeset_cleanup(void) {
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UnicodePropertySet::cleanup();
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return TRUE;
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}
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U_NAMESPACE_BEGIN
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/**
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* Minimum value that can be stored in a UnicodeSet.
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*/
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const UChar32 UnicodeSet::MIN_VALUE = UNICODESET_LOW;
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/**
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* Maximum value that can be stored in a UnicodeSet.
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*/
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const UChar32 UnicodeSet::MAX_VALUE = UNICODESET_HIGH - 1;
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//----------------------------------------------------------------
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// Constructors &c
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//----------------------------------------------------------------
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/**
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* Constructs an empty set.
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*/
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UnicodeSet::UnicodeSet() :
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len(1), capacity(1 + START_EXTRA), bufferCapacity(0),
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buffer(0)
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{
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list = new UChar32[capacity];
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list[0] = UNICODESET_HIGH;
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}
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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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*/
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UnicodeSet::UnicodeSet(UChar32 start, UChar32 end) :
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len(1), capacity(1 + START_EXTRA), bufferCapacity(0),
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buffer(0)
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{
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list = new UChar32[capacity];
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list[0] = UNICODESET_HIGH;
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complement(start, end);
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}
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/**
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* Constructs a set from the given pattern, optionally ignoring
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* white space. See the class description for the syntax of the
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* pattern language.
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* @param pattern a string specifying what characters are in the set
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*/
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UnicodeSet::UnicodeSet(const UnicodeString& pattern,
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UErrorCode& status) :
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len(0), capacity(START_EXTRA), bufferCapacity(0),
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buffer(0)
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{
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list = new UChar32[capacity];
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applyPattern(pattern, status);
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}
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// For internal use by RuleBasedTransliterator
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UnicodeSet::UnicodeSet(const UnicodeString& pattern, ParsePosition& pos,
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const SymbolTable& symbols,
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UErrorCode& status) :
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len(0), capacity(START_EXTRA), bufferCapacity(0),
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buffer(0)
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{
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list = new UChar32[capacity];
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applyPattern(pattern, pos, &symbols, status);
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}
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/**
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* DEPRECATED Constructs a set from the given Unicode character category.
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* @param category an integer indicating the character category as
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* defined in uchar.h.
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* @deprecated To be removed after 2002-DEC-31
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*/
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UnicodeSet::UnicodeSet(int8_t category, UErrorCode& status) :
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len(0), capacity(START_EXTRA), bufferCapacity(0), list(0),
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buffer(0)
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{
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static const UChar OPEN[] = { 91, 58, 0 }; // "[:"
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static const UChar CLOSE[]= { 58, 93, 0 }; // ":]"
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if (U_SUCCESS(status)) {
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if (category < 0 || category >= U_CHAR_CATEGORY_COUNT) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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} else {
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UnicodeString pattern(FALSE, CATEGORY_NAMES + category*2, 2);
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pattern.insert(0, OPEN);
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pattern.append(CLOSE);
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list = new UChar32[capacity];
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applyPattern(pattern, status);
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}
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}
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}
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/**
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* Constructs a set that is identical to the given UnicodeSet.
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*/
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UnicodeSet::UnicodeSet(const UnicodeSet& o) :
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UnicodeFilter(o),
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capacity(o.len + GROW_EXTRA), bufferCapacity(0),
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buffer(0)
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{
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list = new UChar32[capacity];
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*this = o;
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}
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/**
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* Destructs the set.
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*/
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UnicodeSet::~UnicodeSet() {
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delete[] list;
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delete[] buffer;
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}
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/**
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* Assigns this object to be a copy of another.
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*/
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UnicodeSet& UnicodeSet::operator=(const UnicodeSet& o) {
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ensureCapacity(o.len);
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len = o.len;
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uprv_memcpy(list, o.list, len*sizeof(UChar32));
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pat = o.pat;
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return *this;
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}
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/**
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* Compares the specified object with this set for equality. Returns
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* <tt>true</tt> if the two sets
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* have the same size, and every member of the specified set is
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* contained in this set (or equivalently, every member of this set is
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* contained in the specified set).
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*
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* @param o set to be compared for equality with this set.
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* @return <tt>true</tt> if the specified set is equal to this set.
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*/
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UBool UnicodeSet::operator==(const UnicodeSet& o) const {
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if (len != o.len) return FALSE;
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for (int32_t i = 0; i < len; ++i) {
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if (list[i] != o.list[i]) return FALSE;
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}
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return TRUE;
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}
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/**
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* Returns a copy of this object. All UnicodeMatcher objects have
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* to support cloning in order to allow classes using
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* UnicodeMatchers, such as Transliterator, to implement cloning.
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*/
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UnicodeMatcher* UnicodeSet::clone() const {
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return new UnicodeSet(*this);
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}
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/**
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* Returns the hash code value for this set.
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*
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* @return the hash code value for this set.
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* @see Object#hashCode()
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*/
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int32_t UnicodeSet::hashCode(void) const {
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int32_t result = len;
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for (int32_t i = 0; i < len; ++i) {
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result *= 1000003;
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result += list[i];
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}
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return result;
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}
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//----------------------------------------------------------------
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// Public API
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//----------------------------------------------------------------
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/**
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* Make this object represent the range <code>start - end</code>.
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* If <code>end > start</code> then this object is set to an
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* an empty range.
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*
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* @param start first character in the set, inclusive
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* @rparam end last character in the set, inclusive
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*/
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void UnicodeSet::set(UChar32 start, UChar32 end) {
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clear();
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complement(start, end);
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}
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/**
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* Modifies this set to represent the set specified by the given
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* pattern, optionally ignoring white space. 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 ignoreSpaces if <code>true</code>, all spaces in the
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* pattern are ignored. Spaces are those characters for which
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* <code>Character.isSpaceChar()</code> is <code>true</code>.
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* Characters preceded by '\\' are escaped, losing any special
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* meaning they otherwise have. Spaces may be included by
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* escaping them.
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* @exception <code>IllegalArgumentException</code> if the pattern
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* contains a syntax error.
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*/
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void UnicodeSet::applyPattern(const UnicodeString& pattern,
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UErrorCode& status) {
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if (U_FAILURE(status)) {
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return;
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}
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ParsePosition pos(0);
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applyPattern(pattern, pos, NULL, status);
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if (U_FAILURE(status)) return;
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// Skip over trailing whitespace
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int32_t i = pos.getIndex();
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int32_t n = pattern.length();
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while (i<n && Unicode::isWhitespace(pattern.charAt(i))) {
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++i;
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}
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if (i != n) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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}
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/**
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* Return true if the given position, in the given pattern, appears
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* to be the start of a UnicodeSet pattern.
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*/
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UBool UnicodeSet::resemblesPattern(const UnicodeString& pattern, int32_t pos) {
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return ((pos+1) < pattern.length() &&
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pattern.charAt(pos) == (UChar)91/*[*/) ||
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UnicodePropertySet::resemblesPattern(pattern, pos);
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}
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/**
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* Append the <code>toPattern()</code> representation of a
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* character to the given <code>StringBuffer</code>.
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*/
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void UnicodeSet::_appendToPat(UnicodeString& buf, UChar32 c, UBool useHexEscape) {
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if (useHexEscape) {
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// Use hex escape notation (\uxxxx or \Uxxxxxxxx) for anything
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// unprintable
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if (_escapeUnprintable(buf, c)) {
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return;
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}
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}
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// Okay to let ':' pass through
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switch (c) {
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case SET_OPEN:
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case SET_CLOSE:
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case HYPHEN:
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case COMPLEMENT:
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case INTERSECTION:
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case BACKSLASH:
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case 123/*{*/:
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case 125/*}*/:
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buf.append(BACKSLASH);
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break;
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default:
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// Escape whitespace
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if (Unicode::isWhitespace(c)) {
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buf.append(BACKSLASH);
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}
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break;
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}
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buf.append((UChar) c);
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}
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static const UChar HEX[16] = {48,49,50,51,52,53,54,55, // 0-7
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56,57,65,66,67,68,69,70}; // 8-9 A-F
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/**
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* Return true if the character is NOT printable ASCII.
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*
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* This method should really be in UnicodeString (or similar). For
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* now, we implement it here and share it with friend classes.
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*/
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UBool UnicodeSet::_isUnprintable(UChar32 c) {
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return !(c == 0x0A || (c >= 0x20 && c <= 0x7E));
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}
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/**
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* Escape unprintable characters using \uxxxx notation for U+0000 to
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* U+FFFF and \Uxxxxxxxx for U+10000 and above. If the character is
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* printable ASCII, then do nothing and return FALSE. Otherwise,
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* append the escaped notation and return TRUE.
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*
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* This method should really be in UnicodeString. For now, we
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* implement it here and share it with friend classes.
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*/
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UBool UnicodeSet::_escapeUnprintable(UnicodeString& result, UChar32 c) {
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if (_isUnprintable(c)) {
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result.append(BACKSLASH);
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if (c & ~0xFFFF) {
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result.append(UPPER_U);
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result.append(HEX[0xF&(c>>28)]);
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result.append(HEX[0xF&(c>>24)]);
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result.append(HEX[0xF&(c>>20)]);
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result.append(HEX[0xF&(c>>16)]);
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} else {
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result.append(LOWER_U);
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}
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result.append(HEX[0xF&(c>>12)]);
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result.append(HEX[0xF&(c>>8)]);
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result.append(HEX[0xF&(c>>4)]);
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result.append(HEX[0xF&c]);
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Returns a string representation of this set. If the result of
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* calling this function is passed to a UnicodeSet constructor, it
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* will produce another set that is equal to this one.
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*/
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UnicodeString& UnicodeSet::toPattern(UnicodeString& result,
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UBool escapeUnprintable) const {
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result.truncate(0);
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return _toPattern(result, escapeUnprintable);
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}
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/**
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* Append a string representation of this set to result. This will be
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* a cleaned version of the string passed to applyPattern(), if there
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* is one. Otherwise it will be generated.
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*/
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UnicodeString& UnicodeSet::_toPattern(UnicodeString& result,
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UBool escapeUnprintable) const {
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if (pat.length() > 0) {
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int32_t i;
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int32_t backslashCount = 0;
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for (i=0; i<pat.length(); ++i) {
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UChar c = pat.charAt(i);
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if (escapeUnprintable && _isUnprintable(c)) {
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// If the unprintable character is preceded by an odd
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// number of backslashes, then it has been escaped.
|
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// Before unescaping it, we delete the final
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// backslash.
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if ((backslashCount % 2) == 1) {
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result.truncate(result.length() - 1);
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}
|
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_escapeUnprintable(result, c);
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backslashCount = 0;
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} else {
|
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result.append(c);
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if (c == BACKSLASH) {
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++backslashCount;
|
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} else {
|
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backslashCount = 0;
|
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}
|
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}
|
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}
|
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return result;
|
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}
|
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|
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return _generatePattern(result, escapeUnprintable);
|
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}
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|
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/**
|
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* Generate and append a string representation of this set to result.
|
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* This does not use this.pat, the cleaned up copy of the string
|
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* passed to applyPattern().
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*/
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UnicodeString& UnicodeSet::_generatePattern(UnicodeString& result,
|
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UBool escapeUnprintable) const {
|
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result.append(SET_OPEN);
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|
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// // Check against the predefined categories. We implicitly build
|
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// // up ALL category sets the first time toPattern() is called.
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// for (int8_t cat=0; cat<Unicode::GENERAL_TYPES_COUNT; ++cat) {
|
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// if (*this == getCategorySet(cat)) {
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// result.append(COLON);
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// result.append(CATEGORY_NAMES, cat*2, 2);
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// return result.append(CATEGORY_CLOSE);
|
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// }
|
|
// }
|
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|
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int32_t count = getRangeCount();
|
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|
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// If the set contains at least 2 intervals and includes both
|
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// MIN_VALUE and MAX_VALUE, then the inverse representation will
|
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// be more economical.
|
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if (count > 1 &&
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getRangeStart(0) == MIN_VALUE &&
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getRangeEnd(count-1) == MAX_VALUE) {
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|
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// Emit the inverse
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result.append(COMPLEMENT);
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|
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for (int32_t i = 1; i < count; ++i) {
|
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UChar32 start = getRangeEnd(i-1)+1;
|
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UChar32 end = getRangeStart(i)-1;
|
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_appendToPat(result, start, escapeUnprintable);
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if (start != end) {
|
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result.append(HYPHEN);
|
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_appendToPat(result, end, escapeUnprintable);
|
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}
|
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}
|
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}
|
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|
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// Default; emit the ranges as pairs
|
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else {
|
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for (int32_t i = 0; i < count; ++i) {
|
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UChar32 start = getRangeStart(i);
|
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UChar32 end = getRangeEnd(i);
|
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_appendToPat(result, start, escapeUnprintable);
|
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if (start != end) {
|
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result.append(HYPHEN);
|
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_appendToPat(result, end, escapeUnprintable);
|
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}
|
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}
|
|
}
|
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|
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return result.append(SET_CLOSE);
|
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}
|
|
|
|
/**
|
|
* Returns the number of elements in this set (its cardinality),
|
|
* <em>n</em>, where <code>0 <= </code><em>n</em><code> <= 65536</code>.
|
|
*
|
|
* @return the number of elements in this set (its cardinality).
|
|
*/
|
|
int32_t UnicodeSet::size(void) const {
|
|
int32_t n = 0;
|
|
int32_t count = getRangeCount();
|
|
for (int32_t i = 0; i < count; ++i) {
|
|
n += getRangeEnd(i) - getRangeStart(i) + 1;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains no elements.
|
|
*
|
|
* @return <tt>true</tt> if this set contains no elements.
|
|
*/
|
|
UBool UnicodeSet::isEmpty(void) const {
|
|
return len == 1;
|
|
}
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains every character
|
|
* in the specified range of chars.
|
|
* If <code>end > start</code> then the results of this method
|
|
* are undefined.
|
|
*
|
|
* @return <tt>true</tt> if this set contains the specified range
|
|
* of chars.
|
|
*/
|
|
UBool UnicodeSet::contains(UChar32 start, UChar32 end) const {
|
|
int32_t i = -1;
|
|
for (;;) {
|
|
if (start < list[++i]) break;
|
|
}
|
|
return ((i & 1) != 0 && end < list[i]);
|
|
}
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if this set contains the specified char.
|
|
*
|
|
* @return <tt>true</tt> if this set contains the specified char.
|
|
*/
|
|
UBool UnicodeSet::contains(UChar32 c) const {
|
|
// Set i to the index of the start item greater than ch
|
|
// We know we will terminate without length test!
|
|
// LATER: for large sets, add binary search
|
|
int32_t i = -1;
|
|
for (;;) {
|
|
if (c < list[++i]) break;
|
|
}
|
|
return ((i & 1) != 0); // return true if odd
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
UBool UnicodeSet::matchesIndexValue(uint8_t v) const {
|
|
/* The index value v, in the range [0,255], is contained in this set if
|
|
* it is contained in any pair of this set. Pairs either have the high
|
|
* bytes equal, or unequal. If the high bytes are equal, then we have
|
|
* aaxx..aayy, where aa is the high byte. Then v is contained if xx <=
|
|
* v <= yy. If the high bytes are unequal we have aaxx..bbyy, bb>aa.
|
|
* Then v is contained if xx <= v || v <= yy. (This is identical to the
|
|
* time zone month containment logic.)
|
|
*/
|
|
for (int32_t i=0; i<getRangeCount(); ++i) {
|
|
UChar32 low = getRangeStart(i);
|
|
UChar32 high = getRangeEnd(i);
|
|
if ((low & ~0xFF) == (high & ~0xFF)) {
|
|
if ((low & 0xFF) <= v && v <= (high & 0xFF)) {
|
|
return TRUE;
|
|
}
|
|
} else if ((low & 0xFF) <= v || v <= (high & 0xFF)) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of UnicodeMatcher::matches().
|
|
*/
|
|
UMatchDegree UnicodeSet::matches(const Replaceable& text,
|
|
int32_t& offset,
|
|
int32_t limit,
|
|
UBool incremental) const {
|
|
if (offset == limit) {
|
|
if (contains(TransliterationRule::ETHER)) {
|
|
return incremental ? U_PARTIAL_MATCH : U_MATCH;
|
|
} else {
|
|
return U_MISMATCH;
|
|
}
|
|
} else {
|
|
return UnicodeFilter::matches(text, offset, limit, incremental);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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>end > start</code>
|
|
* then an empty range is added, leaving the set unchanged.
|
|
*
|
|
* @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.
|
|
*/
|
|
void UnicodeSet::add(UChar32 start, UChar32 end) {
|
|
if (start <= end) {
|
|
UChar32 range[3] = { start, end+1, UNICODESET_HIGH };
|
|
add(range, 2, 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
void UnicodeSet::add(UChar32 c) {
|
|
add(c, c);
|
|
}
|
|
|
|
/**
|
|
* Retain only the elements in this set that are contained in the
|
|
* specified range. If <code>end > start</code> then an empty range is
|
|
* retained, leaving the set empty.
|
|
*
|
|
* @param start first character, inclusive, of range to be retained
|
|
* to this set.
|
|
* @param end last character, inclusive, of range to be retained
|
|
* to this set.
|
|
*/
|
|
void UnicodeSet::retain(UChar32 start, UChar32 end) {
|
|
if (start <= end) {
|
|
UChar32 range[3] = { start, end+1, UNICODESET_HIGH };
|
|
retain(range, 2, 0);
|
|
} else {
|
|
clear();
|
|
}
|
|
}
|
|
|
|
void UnicodeSet::retain(UChar32 c) {
|
|
retain(c, c);
|
|
}
|
|
|
|
/**
|
|
* 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>end > start</code> then an empty range is
|
|
* removed, leaving the set unchanged.
|
|
*
|
|
* @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.
|
|
*/
|
|
void UnicodeSet::remove(UChar32 start, UChar32 end) {
|
|
if (start <= end) {
|
|
UChar32 range[3] = { start, end+1, UNICODESET_HIGH };
|
|
retain(range, 2, 2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes the specified character from this set if it is present.
|
|
* The set will not contain the specified range once the call
|
|
* returns.
|
|
*/
|
|
void UnicodeSet::remove(UChar32 c) {
|
|
remove(c, c);
|
|
}
|
|
|
|
/**
|
|
* 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>end > start</code>
|
|
* then an empty range is xor'ed, leaving the set unchanged.
|
|
*
|
|
* @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.
|
|
*/
|
|
void UnicodeSet::complement(UChar32 start, UChar32 end) {
|
|
if (start <= end) {
|
|
UChar32 range[3] = { start, end+1, UNICODESET_HIGH };
|
|
exclusiveOr(range, 2, 0);
|
|
}
|
|
}
|
|
|
|
void UnicodeSet::complement(UChar32 c) {
|
|
complement(c, c);
|
|
}
|
|
|
|
/**
|
|
* Returns <tt>true</tt> if the specified set is a <i>subset</i>
|
|
* of this set.
|
|
*
|
|
* @param c set to be checked for containment in this set.
|
|
* @return <tt>true</tt> if this set contains all of the elements of the
|
|
* specified set.
|
|
*/
|
|
UBool UnicodeSet::containsAll(const UnicodeSet& c) const {
|
|
// The specified set is a subset if all of its pairs are contained in
|
|
// this set. It's possible to code this more efficiently in terms of
|
|
// direct manipulation of the inversion lists if the need arises.
|
|
int32_t n = c.getRangeCount();
|
|
for (int i=0; i<n; ++i) {
|
|
if (!contains(c.getRangeStart(i), c.getRangeEnd(i))) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Adds all of the elements in the specified set to this set if
|
|
* they're not already present. This operation effectively
|
|
* modifies this set so that its value is the <i>union</i> of the two
|
|
* sets. The behavior of this operation is unspecified if the specified
|
|
* collection is modified while the operation is in progress.
|
|
*
|
|
* @param c set whose elements are to be added to this set.
|
|
* @see #add(char, char)
|
|
*/
|
|
void UnicodeSet::addAll(const UnicodeSet& c) {
|
|
add(c.list, c.len, 0);
|
|
}
|
|
|
|
/**
|
|
* Retains only the elements in this set that are contained in the
|
|
* specified set. In other words, removes from this set all of
|
|
* its elements that are not contained in the specified set. This
|
|
* operation effectively modifies this set so that its value is
|
|
* the <i>intersection</i> of the two sets.
|
|
*
|
|
* @param c set that defines which elements this set will retain.
|
|
*/
|
|
void UnicodeSet::retainAll(const UnicodeSet& c) {
|
|
retain(c.list, c.len, 0);
|
|
}
|
|
|
|
/**
|
|
* Removes from this set all of its elements that are contained in the
|
|
* specified set. This operation effectively modifies this
|
|
* set so that its value is the <i>asymmetric set difference</i> of
|
|
* the two sets.
|
|
*
|
|
* @param c set that defines which elements will be removed from
|
|
* this set.
|
|
*/
|
|
void UnicodeSet::removeAll(const UnicodeSet& c) {
|
|
retain(c.list, c.len, 2);
|
|
}
|
|
|
|
/**
|
|
* Complements in this set all elements contained in the specified
|
|
* set. Any character in the other set will be removed if it is
|
|
* in this set, or will be added if it is not in this set.
|
|
*
|
|
* @param c set that defines which elements will be xor'ed from
|
|
* this set.
|
|
*/
|
|
void UnicodeSet::complementAll(const UnicodeSet& c) {
|
|
exclusiveOr(c.list, c.len, 0);
|
|
}
|
|
|
|
/**
|
|
* Inverts this set. This operation modifies this set so that its
|
|
* value is its complement. This is equivalent to the pseudo
|
|
* code: <code>this = new UnicodeSet(UnicodeSet.MIN_VALUE,
|
|
* UnicodeSet.MAX_VALUE).removeAll(this)</code>.
|
|
*/
|
|
void UnicodeSet::complement(void) {
|
|
if (list[0] == UNICODESET_LOW) {
|
|
ensureBufferCapacity(len-1);
|
|
uprv_memcpy(buffer, list + 1, (len-1)*sizeof(UChar32));
|
|
--len;
|
|
} else {
|
|
ensureBufferCapacity(len+1);
|
|
uprv_memcpy(buffer + 1, list, len*sizeof(UChar32));
|
|
buffer[0] = UNICODESET_LOW;
|
|
++len;
|
|
}
|
|
swapBuffers();
|
|
pat.truncate(0);
|
|
}
|
|
|
|
/**
|
|
* Removes all of the elements from this set. This set will be
|
|
* empty after this call returns.
|
|
*/
|
|
void UnicodeSet::clear(void) {
|
|
list[0] = UNICODESET_HIGH;
|
|
len = 1;
|
|
pat.truncate(0);
|
|
}
|
|
|
|
/**
|
|
* Iteration method that returns the number of ranges contained in
|
|
* this set.
|
|
* @see #getRangeStart
|
|
* @see #getRangeEnd
|
|
*/
|
|
int32_t UnicodeSet::getRangeCount() const {
|
|
return len/2;
|
|
}
|
|
|
|
/**
|
|
* Iteration method that returns the first character in the
|
|
* specified range of this set.
|
|
* @see #getRangeCount
|
|
* @see #getRangeEnd
|
|
*/
|
|
UChar32 UnicodeSet::getRangeStart(int32_t index) const {
|
|
return list[index*2];
|
|
}
|
|
|
|
/**
|
|
* Iteration method that returns the last character in the
|
|
* specified range of this set.
|
|
* @see #getRangeStart
|
|
* @see #getRangeEnd
|
|
*/
|
|
UChar32 UnicodeSet::getRangeEnd(int32_t index) const {
|
|
return list[index*2 + 1] - 1;
|
|
}
|
|
|
|
/**
|
|
* Reallocate this objects internal structures to take up the least
|
|
* possible space, without changing this object's value.
|
|
*/
|
|
void UnicodeSet::compact() {
|
|
if (len != capacity) {
|
|
capacity = len;
|
|
UChar32* temp = new UChar32[capacity];
|
|
uprv_memcpy(temp, list, len*sizeof(UChar32));
|
|
delete[] list;
|
|
list = temp;
|
|
}
|
|
delete[] buffer;
|
|
buffer = NULL;
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Pattern parsing
|
|
//----------------------------------------------------------------
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @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 U_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.
|
|
* @return a StringBuffer containing a pairs list for the parsed
|
|
* substring of <code>pattern</code>
|
|
* @exception IllegalArgumentException if the parse fails.
|
|
*/
|
|
void UnicodeSet::applyPattern(const UnicodeString& pattern,
|
|
ParsePosition& pos,
|
|
const SymbolTable* symbols,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
// Need to build the pattern in a temporary string because
|
|
// _applyPattern calls add() etc., which set pat to empty.
|
|
UnicodeString rebuiltPat;
|
|
_applyPattern(pattern, pos, symbols, rebuiltPat, status);
|
|
pat = rebuiltPat;
|
|
}
|
|
|
|
void UnicodeSet::_applyPattern(const UnicodeString& pattern,
|
|
ParsePosition& pos,
|
|
const SymbolTable* symbols,
|
|
UnicodeString& rebuiltPat,
|
|
UErrorCode& status) {
|
|
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
// If the pattern contains any of the following, we save a
|
|
// rebuilt (variable-substituted) copy of the source pattern:
|
|
// - a category
|
|
// - an intersection or subtraction operator
|
|
// - an anchor (trailing '$', indicating RBT ether)
|
|
UBool rebuildPattern = FALSE;
|
|
UnicodeString newPat(SET_OPEN);
|
|
int32_t nestedPatStart; // see below for usage
|
|
UBool nestedPatDone; // see below for usage
|
|
|
|
UBool invert = FALSE;
|
|
clear();
|
|
|
|
const UChar32 NONE = (UChar32) -1;
|
|
UChar32 lastChar = NONE; // This is either a char (0..10FFFF) or NONE
|
|
UChar lastOp = 0;
|
|
|
|
/* This loop iterates over the characters in the pattern. We start at
|
|
* the position specified by pos. We exit the loop when either a
|
|
* matching closing ']' is seen, or we read all characters of the
|
|
* pattern. In the latter case an error will be thrown.
|
|
*/
|
|
|
|
/* Pattern syntax:
|
|
* pat := '[' '^'? elem* ']'
|
|
* elem := a | a '-' a | set | set op set
|
|
* set := pat | (a set variable)
|
|
* op := '&' | '-'
|
|
* a := (a character, possibly defined by a var)
|
|
*/
|
|
|
|
// mode 0: No chars parsed yet; next must be '['
|
|
// mode 1: '[' seen; if next is '^' or ':' then special
|
|
// mode 2: '[' '^'? seen; parse pattern and close with ']'
|
|
// mode 3: '[:' seen; parse category and close with ':]'
|
|
// mode 4: ']' seen; parse complete
|
|
// mode 5: Top-level property pattern seen
|
|
int8_t mode = 0;
|
|
int32_t i = pos.getIndex();
|
|
int32_t limit = pattern.length();
|
|
UnicodeSet nestedAux;
|
|
const UnicodeSet* nestedSet; // never owned
|
|
UnicodeString scratch;
|
|
/* In the case of an embedded SymbolTable variable, we look it up and
|
|
* then take characters from the resultant char[] array. These chars
|
|
* are subjected to an extra level of lookup in the SymbolTable in case
|
|
* they are stand-ins for a nested UnicodeSet. */
|
|
const UnicodeString* varValueBuffer = NULL;
|
|
int32_t ivarValueBuffer = 0;
|
|
int32_t anchor = 0;
|
|
UChar32 c;
|
|
while (i<limit) {
|
|
/* If the next element is a single character, c will be set to it,
|
|
* and nestedSet will be null. In this case isLiteral indicates
|
|
* whether the character should assume special meaning if it has
|
|
* one. If the next element is a nested set, either via a variable
|
|
* reference, or via an embedded "[..]" or "[:..:]" pattern, then
|
|
* nestedSet will be set to the pairs list for the nested set, and
|
|
* c's value should be ignored.
|
|
*/
|
|
nestedSet = NULL;
|
|
UBool isLiteral = FALSE;
|
|
if (varValueBuffer != NULL) {
|
|
if (ivarValueBuffer < varValueBuffer->length()) {
|
|
c = varValueBuffer->char32At(ivarValueBuffer);
|
|
ivarValueBuffer += UTF_CHAR_LENGTH(c);
|
|
nestedSet = symbols->lookupSet(c); // may be NULL
|
|
nestedPatDone = FALSE;
|
|
} else {
|
|
varValueBuffer = NULL;
|
|
c = pattern.char32At(i);
|
|
i += UTF_CHAR_LENGTH(c);
|
|
}
|
|
} else {
|
|
c = pattern.char32At(i);
|
|
i += UTF_CHAR_LENGTH(c);
|
|
}
|
|
|
|
// Ignore whitespace. This is not Unicode whitespace, but Java
|
|
// whitespace, a subset of Unicode whitespace.
|
|
if (u_isspace(c)) {
|
|
continue;
|
|
}
|
|
|
|
// Keep track of the count of characters after an alleged anchor
|
|
if (anchor > 0) {
|
|
++anchor;
|
|
}
|
|
|
|
// Parse the opening '[' and optional following '^'
|
|
switch (mode) {
|
|
case 0:
|
|
if (UnicodePropertySet::resemblesPattern(pattern, i-1)) {
|
|
mode = 3;
|
|
break; // Fall through
|
|
} else if (c == SET_OPEN) {
|
|
mode = 1; // Next look for '^' or ':'
|
|
continue;
|
|
} else {
|
|
// throw new IllegalArgumentException("Missing opening '['");
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
case 1:
|
|
mode = 2;
|
|
switch (c) {
|
|
case COMPLEMENT:
|
|
invert = TRUE;
|
|
newPat.append(c);
|
|
continue; // Back to top to fetch next character
|
|
case HYPHEN:
|
|
isLiteral = TRUE; // Treat leading '-' as a literal
|
|
break; // Fall through
|
|
}
|
|
// else fall through and parse this character normally
|
|
}
|
|
|
|
// After opening matter is parsed ("[", "[^", or "[:"), the mode
|
|
// will be 2 if we want a closing ']', or 3 if we should parse a
|
|
// category and close with ":]".
|
|
|
|
// Only process escapes, variable references, and nested sets
|
|
// if we are _not_ retrieving characters from the variable
|
|
// buffer. Characters in the variable buffer have already
|
|
// benn through escape and variable reference processing.
|
|
if (varValueBuffer == NULL) {
|
|
/**
|
|
* Handle property set patterns.
|
|
*/
|
|
if (UnicodePropertySet::resemblesPattern(pattern, i-1)) {
|
|
ParsePosition pp(i-1);
|
|
UnicodeSet *s = UnicodePropertySet::createFromPattern(pattern, pp);
|
|
if (s == NULL) {
|
|
// assert(pp.getIndex() == i-1);
|
|
//throw new IllegalArgumentException("Invalid property pattern " +
|
|
// pattern.substring(i-1));
|
|
status = U_INVALID_PROPERTY_PATTERN;
|
|
return;
|
|
}
|
|
// TODO This is very inefficient. We create a new UnicodeSet,
|
|
// then do an assignment, then delete it. Clean this up in
|
|
// the future so that either (1) we just use the new set
|
|
// directly, and delete it when we're done, or (2) even better,
|
|
// UnicodePropertySet takes an existing set.
|
|
nestedAux = *s;
|
|
delete s;
|
|
nestedSet = &nestedAux;
|
|
nestedPatStart = newPat.length();
|
|
nestedPatDone = TRUE; // we're going to do it just below
|
|
|
|
// If we have a top-level property pattern, then trim
|
|
// off the opening '[' and use the property pattern
|
|
// as the entire pattern.
|
|
if (mode == 3) {
|
|
newPat.truncate(0);
|
|
}
|
|
UnicodeString str;
|
|
pattern.extractBetween(i-1, pp.getIndex(), str);
|
|
newPat.append(str);
|
|
rebuildPattern = TRUE;
|
|
|
|
i = pp.getIndex(); // advance past property pattern
|
|
|
|
if (mode == 3) {
|
|
// Entire pattern is a category; leave parse
|
|
// loop. This is one of 2 ways we leave this
|
|
// loop if the pattern is well-formed.
|
|
*this = nestedAux;
|
|
mode = 5;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Handle escapes. If a character is escaped, then it assumes its
|
|
* literal value. This is true for all characters, both special
|
|
* characters and characters with no special meaning. We also
|
|
* interpret '\\uxxxx' Unicode escapes here (as literals).
|
|
*/
|
|
else if (c == BACKSLASH) {
|
|
UChar32 escaped = pattern.unescapeAt(i);
|
|
if (escaped == (UChar32) -1) {
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
isLiteral = TRUE;
|
|
c = escaped;
|
|
}
|
|
|
|
/* Parse variable references. These are treated as literals. If a
|
|
* variable refers to a UnicodeSet, its stand in character is
|
|
* returned in the UChar[] buffer.
|
|
* Variable names are only parsed if varNameToChar is not null.
|
|
* Set variables are only looked up if varCharToSet is not null.
|
|
*/
|
|
else if (symbols != NULL && !isLiteral && c == SymbolTable::SYMBOL_REF) {
|
|
pos.setIndex(i);
|
|
UnicodeString name = symbols->parseReference(pattern, pos, limit);
|
|
if (name.length() != 0) {
|
|
varValueBuffer = symbols->lookup(name);
|
|
if (varValueBuffer == NULL) {
|
|
//throw new IllegalArgumentException("Undefined variable: "
|
|
// + name);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
ivarValueBuffer = 0;
|
|
i = pos.getIndex(); // Make i point PAST last char of var name
|
|
} else {
|
|
// Got a null; this means we have an isolated $.
|
|
// Tentatively assume this is an anchor.
|
|
anchor = 1;
|
|
}
|
|
continue; // Back to the top to get varValueBuffer[0]
|
|
}
|
|
|
|
/* An opening bracket indicates the first bracket of a nested
|
|
* subpattern.
|
|
*/
|
|
else if (!isLiteral && c == SET_OPEN) {
|
|
// Record position before nested pattern
|
|
nestedPatStart = newPat.length();
|
|
|
|
// Recurse to get the pairs for this nested set.
|
|
// Backup i to '['.
|
|
pos.setIndex(--i);
|
|
switch (lastOp) {
|
|
case HYPHEN:
|
|
case INTERSECTION:
|
|
newPat.append(lastOp);
|
|
break;
|
|
}
|
|
nestedAux._applyPattern(pattern, pos, symbols, newPat, status);
|
|
nestedSet = &nestedAux;
|
|
nestedPatDone = TRUE;
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
i = pos.getIndex();
|
|
}
|
|
}
|
|
|
|
/* At this point we have either a character c, or a nested set. If
|
|
* we have encountered a nested set, either embedded in the pattern,
|
|
* or as a variable, we have a non-null nestedSet, and c should be
|
|
* ignored. Otherwise c is the current character, and isLiteral
|
|
* indicates whether it is an escaped literal (or variable) or a
|
|
* normal unescaped character. Unescaped characters '-', '&', and
|
|
* ']' have special meanings.
|
|
*/
|
|
if (nestedSet != NULL) {
|
|
if (lastChar != NONE) {
|
|
if (lastOp != 0) {
|
|
// throw new IllegalArgumentException("Illegal rhs for " + lastChar + lastOp);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
add(lastChar, lastChar);
|
|
if (nestedPatDone) {
|
|
// If there was a character before the nested set,
|
|
// then we need to insert it in newPat before the
|
|
// pattern for the nested set. This position was
|
|
// recorded in nestedPatStart.
|
|
UnicodeString s;
|
|
_appendToPat(s, lastChar, FALSE);
|
|
newPat.insert(nestedPatStart, s);
|
|
} else {
|
|
_appendToPat(newPat, lastChar, FALSE);
|
|
}
|
|
lastChar = NONE;
|
|
}
|
|
switch (lastOp) {
|
|
case HYPHEN:
|
|
removeAll(*nestedSet);
|
|
break;
|
|
case INTERSECTION:
|
|
retainAll(*nestedSet);
|
|
break;
|
|
case 0:
|
|
addAll(*nestedSet);
|
|
break;
|
|
}
|
|
|
|
// Get the pattern for the nested set, if we haven't done so
|
|
// already.
|
|
if (!nestedPatDone) {
|
|
if (lastOp != 0) {
|
|
newPat.append(lastOp);
|
|
}
|
|
nestedSet->_toPattern(newPat, FALSE);
|
|
}
|
|
rebuildPattern = TRUE;
|
|
|
|
lastOp = 0;
|
|
|
|
} else if (!isLiteral && c == SET_CLOSE) {
|
|
// Final closing delimiter. This is one of 2 ways we
|
|
// leave this loop if the pattern is well-formed.
|
|
if (anchor > 2 || anchor == 1) {
|
|
//throw new IllegalArgumentException("Syntax error near $" + pattern);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
if (anchor == 2) {
|
|
rebuildPattern = TRUE;
|
|
newPat.append((UChar)SymbolTable::SYMBOL_REF);
|
|
add(TransliterationRule::ETHER);
|
|
}
|
|
mode = 4;
|
|
break;
|
|
} else if (lastOp == 0 && !isLiteral && (c == HYPHEN || c == INTERSECTION)) {
|
|
// assert(c <= 0xFFFF);
|
|
lastOp = (UChar) c;
|
|
} else if (lastOp == HYPHEN) {
|
|
if (lastChar >= c) {
|
|
// Don't allow redundant (a-a) or empty (b-a) ranges;
|
|
// these are most likely typos.
|
|
//throw new IllegalArgumentException("Invalid range " + lastChar +
|
|
// '-' + c);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
add(lastChar, c);
|
|
_appendToPat(newPat, lastChar, FALSE);
|
|
newPat.append(HYPHEN);
|
|
_appendToPat(newPat, c, FALSE);
|
|
lastOp = 0;
|
|
lastChar = NONE;
|
|
} else if (lastOp != 0) {
|
|
// We have <set>&<char> or <char>&<char>
|
|
// throw new IllegalArgumentException("Unquoted " + lastOp);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
} else {
|
|
if (lastChar != NONE) {
|
|
// We have <char><char>
|
|
add(lastChar, lastChar);
|
|
_appendToPat(newPat, lastChar, FALSE);
|
|
}
|
|
lastChar = c;
|
|
}
|
|
}
|
|
|
|
if (mode < 4) {
|
|
// throw new IllegalArgumentException("Missing ']'");
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
// Treat a trailing '$' as indicating ETHER. This code is only
|
|
// executed if symbols == NULL; otherwise other code parses the
|
|
// anchor.
|
|
if (lastChar == (UChar)SymbolTable::SYMBOL_REF) {
|
|
rebuildPattern = TRUE;
|
|
newPat.append(lastChar);
|
|
add(TransliterationRule::ETHER);
|
|
}
|
|
|
|
else if (lastChar != NONE) {
|
|
add(lastChar, lastChar);
|
|
_appendToPat(newPat, lastChar, FALSE);
|
|
}
|
|
|
|
// Handle unprocessed stuff preceding the closing ']'
|
|
if (lastOp == HYPHEN) {
|
|
// Trailing '-' is treated as literal
|
|
add(lastOp, lastOp);
|
|
newPat.append(HYPHEN);
|
|
} else if (lastOp == INTERSECTION) {
|
|
// throw new IllegalArgumentException("Unquoted trailing " + lastOp);
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
if (mode == 4) {
|
|
newPat.append(SET_CLOSE);
|
|
}
|
|
|
|
/**
|
|
* If we saw a '^' after the initial '[' of this pattern, then perform
|
|
* the complement. (Inversion after '[:' is handled elsewhere.)
|
|
*/
|
|
if (invert) {
|
|
complement();
|
|
}
|
|
|
|
pos.setIndex(i);
|
|
|
|
// Use the rebuilt pattern (newPat) only if necessary. Prefer the
|
|
// generated pattern.
|
|
if (rebuildPattern) {
|
|
rebuiltPat.append(newPat);
|
|
} else {
|
|
_generatePattern(rebuiltPat, FALSE);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Utility methods
|
|
//----------------------------------------------------------------
|
|
|
|
void UnicodeSet::ensureCapacity(int32_t newLen) {
|
|
if (newLen <= capacity) return;
|
|
capacity = newLen + GROW_EXTRA;
|
|
UChar32* temp = new UChar32[capacity];
|
|
uprv_memcpy(temp, list, len*sizeof(UChar32));
|
|
delete[] list;
|
|
list = temp;
|
|
}
|
|
|
|
void UnicodeSet::ensureBufferCapacity(int32_t newLen) {
|
|
if (buffer != NULL && newLen <= bufferCapacity) return;
|
|
delete[] buffer;
|
|
bufferCapacity = newLen + GROW_EXTRA;
|
|
buffer = new UChar32[bufferCapacity];
|
|
}
|
|
|
|
/**
|
|
* Swap list and buffer.
|
|
*/
|
|
void UnicodeSet::swapBuffers(void) {
|
|
// swap list and buffer
|
|
UChar32* temp = list;
|
|
list = buffer;
|
|
buffer = temp;
|
|
|
|
int32_t c = capacity;
|
|
capacity = bufferCapacity;
|
|
bufferCapacity = c;
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Implementation: Fundamental operators
|
|
//----------------------------------------------------------------
|
|
|
|
static inline UChar32 max(UChar32 a, UChar32 b) {
|
|
return (a > b) ? a : b;
|
|
}
|
|
|
|
// polarity = 0, 3 is normal: x xor y
|
|
// polarity = 1, 2: x xor ~y == x === y
|
|
|
|
void UnicodeSet::exclusiveOr(const UChar32* other, int32_t otherLen, int8_t polarity) {
|
|
ensureBufferCapacity(len + otherLen);
|
|
int32_t i = 0, j = 0, k = 0;
|
|
UChar32 a = list[i++];
|
|
UChar32 b;
|
|
if (polarity == 1 || polarity == 2) {
|
|
b = UNICODESET_LOW;
|
|
if (other[j] == UNICODESET_LOW) { // skip base if already LOW
|
|
++j;
|
|
b = other[j];
|
|
}
|
|
} else {
|
|
b = other[j++];
|
|
}
|
|
// simplest of all the routines
|
|
// sort the values, discarding identicals!
|
|
for (;;) {
|
|
if (a < b) {
|
|
buffer[k++] = a;
|
|
a = list[i++];
|
|
} else if (b < a) {
|
|
buffer[k++] = b;
|
|
b = other[j++];
|
|
} else if (a != UNICODESET_HIGH) { // at this point, a == b
|
|
// discard both values!
|
|
a = list[i++];
|
|
b = other[j++];
|
|
} else { // DONE!
|
|
buffer[k++] = UNICODESET_HIGH;
|
|
len = k;
|
|
break;
|
|
}
|
|
}
|
|
swapBuffers();
|
|
pat.truncate(0);
|
|
}
|
|
|
|
// polarity = 0 is normal: x union y
|
|
// polarity = 2: x union ~y
|
|
// polarity = 1: ~x union y
|
|
// polarity = 3: ~x union ~y
|
|
|
|
void UnicodeSet::add(const UChar32* other, int32_t otherLen, int8_t polarity) {
|
|
ensureBufferCapacity(len + otherLen);
|
|
int32_t i = 0, j = 0, k = 0;
|
|
UChar32 a = list[i++];
|
|
UChar32 b = other[j++];
|
|
// change from xor is that we have to check overlapping pairs
|
|
// polarity bit 1 means a is second, bit 2 means b is.
|
|
for (;;) {
|
|
switch (polarity) {
|
|
case 0: // both first; take lower if unequal
|
|
if (a < b) { // take a
|
|
// Back up over overlapping ranges in buffer[]
|
|
if (k > 0 && a <= buffer[k-1]) {
|
|
// Pick latter end value in buffer[] vs. list[]
|
|
a = max(list[i], buffer[--k]);
|
|
} else {
|
|
// No overlap
|
|
buffer[k++] = a;
|
|
a = list[i];
|
|
}
|
|
i++; // Common if/else code factored out
|
|
polarity ^= 1;
|
|
} else if (b < a) { // take b
|
|
if (k > 0 && b <= buffer[k-1]) {
|
|
b = max(other[j], buffer[--k]);
|
|
} else {
|
|
buffer[k++] = b;
|
|
b = other[j];
|
|
}
|
|
j++;
|
|
polarity ^= 2;
|
|
} else { // a == b, take a, drop b
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
// This is symmetrical; it doesn't matter if
|
|
// we backtrack with a or b. - liu
|
|
if (k > 0 && a <= buffer[k-1]) {
|
|
a = max(list[i], buffer[--k]);
|
|
} else {
|
|
// No overlap
|
|
buffer[k++] = a;
|
|
a = list[i];
|
|
}
|
|
i++;
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
case 3: // both second; take higher if unequal, and drop other
|
|
if (b <= a) { // take a
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
buffer[k++] = a;
|
|
} else { // take b
|
|
if (b == UNICODESET_HIGH) goto loop_end;
|
|
buffer[k++] = b;
|
|
}
|
|
a = list[i++];
|
|
polarity ^= 1; // factored common code
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
break;
|
|
case 1: // a second, b first; if b < a, overlap
|
|
if (a < b) { // no overlap, take a
|
|
buffer[k++] = a; a = list[i++]; polarity ^= 1;
|
|
} else if (b < a) { // OVERLAP, drop b
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else { // a == b, drop both!
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
case 2: // a first, b second; if a < b, overlap
|
|
if (b < a) { // no overlap, take b
|
|
buffer[k++] = b;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else if (a < b) { // OVERLAP, drop a
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
} else { // a == b, drop both!
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
loop_end:
|
|
buffer[k++] = UNICODESET_HIGH; // terminate
|
|
len = k;
|
|
swapBuffers();
|
|
pat.truncate(0);
|
|
}
|
|
|
|
// polarity = 0 is normal: x intersect y
|
|
// polarity = 2: x intersect ~y == set-minus
|
|
// polarity = 1: ~x intersect y
|
|
// polarity = 3: ~x intersect ~y
|
|
|
|
void UnicodeSet::retain(const UChar32* other, int32_t otherLen, int8_t polarity) {
|
|
ensureBufferCapacity(len + otherLen);
|
|
int32_t i = 0, j = 0, k = 0;
|
|
UChar32 a = list[i++];
|
|
UChar32 b = other[j++];
|
|
// change from xor is that we have to check overlapping pairs
|
|
// polarity bit 1 means a is second, bit 2 means b is.
|
|
for (;;) {
|
|
switch (polarity) {
|
|
case 0: // both first; drop the smaller
|
|
if (a < b) { // drop a
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
} else if (b < a) { // drop b
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else { // a == b, take one, drop other
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
buffer[k++] = a;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
case 3: // both second; take lower if unequal
|
|
if (a < b) { // take a
|
|
buffer[k++] = a;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
} else if (b < a) { // take b
|
|
buffer[k++] = b;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else { // a == b, take one, drop other
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
buffer[k++] = a;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
case 1: // a second, b first;
|
|
if (a < b) { // NO OVERLAP, drop a
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
} else if (b < a) { // OVERLAP, take b
|
|
buffer[k++] = b;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else { // a == b, drop both!
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
case 2: // a first, b second; if a < b, overlap
|
|
if (b < a) { // no overlap, drop b
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
} else if (a < b) { // OVERLAP, take a
|
|
buffer[k++] = a;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
} else { // a == b, drop both!
|
|
if (a == UNICODESET_HIGH) goto loop_end;
|
|
a = list[i++];
|
|
polarity ^= 1;
|
|
b = other[j++];
|
|
polarity ^= 2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
loop_end:
|
|
buffer[k++] = UNICODESET_HIGH; // terminate
|
|
len = k;
|
|
swapBuffers();
|
|
pat.truncate(0);
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|