251 lines
8.7 KiB
C++
251 lines
8.7 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 2011, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uniset_closure.cpp
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2011may30
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* created by: Markus W. Scherer
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*
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* UnicodeSet::closeOver() and related methods moved here from uniset_props.cpp
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* to simplify dependencies.
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* In particular, this depends on the BreakIterator, but the BreakIterator
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* code also builds UnicodeSets from patterns and needs uniset_props.
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*/
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#include "unicode/brkiter.h"
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#include "unicode/locid.h"
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#include "unicode/parsepos.h"
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#include "unicode/uniset.h"
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#include "cmemory.h"
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#include "ruleiter.h"
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#include "ucase.h"
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#include "util.h"
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#include "uvector.h"
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U_NAMESPACE_BEGIN
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// TODO memory debugging provided inside uniset.cpp
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// could be made available here but probably obsolete with use of modern
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// memory leak checker tools
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#define _dbgct(me)
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//----------------------------------------------------------------
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// Constructors &c
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//----------------------------------------------------------------
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UnicodeSet::UnicodeSet(const UnicodeString& pattern,
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uint32_t options,
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const SymbolTable* symbols,
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UErrorCode& status) {
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applyPattern(pattern, options, symbols, status);
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_dbgct(this);
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}
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UnicodeSet::UnicodeSet(const UnicodeString& pattern, ParsePosition& pos,
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uint32_t options,
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const SymbolTable* symbols,
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UErrorCode& status) {
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applyPattern(pattern, pos, options, symbols, status);
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_dbgct(this);
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}
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//----------------------------------------------------------------
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// Public API
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//----------------------------------------------------------------
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UnicodeSet& UnicodeSet::applyPattern(const UnicodeString& pattern,
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uint32_t options,
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const SymbolTable* symbols,
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UErrorCode& status) {
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ParsePosition pos(0);
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applyPattern(pattern, pos, options, symbols, status);
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if (U_FAILURE(status)) return *this;
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int32_t i = pos.getIndex();
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if (options & USET_IGNORE_SPACE) {
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// Skip over trailing whitespace
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ICU_Utility::skipWhitespace(pattern, i, TRUE);
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}
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if (i != pattern.length()) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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return *this;
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}
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UnicodeSet& UnicodeSet::applyPattern(const UnicodeString& pattern,
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ParsePosition& pos,
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uint32_t options,
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const SymbolTable* symbols,
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UErrorCode& status) {
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if (U_FAILURE(status)) {
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return *this;
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}
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if (isFrozen()) {
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status = U_NO_WRITE_PERMISSION;
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return *this;
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}
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// Need to build the pattern in a temporary string because
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// _applyPattern calls add() etc., which set pat to empty.
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UnicodeString rebuiltPat;
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RuleCharacterIterator chars(pattern, symbols, pos);
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applyPattern(chars, symbols, rebuiltPat, options, &UnicodeSet::closeOver, 0, status);
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if (U_FAILURE(status)) return *this;
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if (chars.inVariable()) {
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// syntaxError(chars, "Extra chars in variable value");
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status = U_MALFORMED_SET;
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return *this;
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}
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setPattern(rebuiltPat);
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return *this;
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}
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// USetAdder implementation
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// Does not use uset.h to reduce code dependencies
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static void U_CALLCONV
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_set_add(USet *set, UChar32 c) {
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((UnicodeSet *)set)->add(c);
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}
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static void U_CALLCONV
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_set_addRange(USet *set, UChar32 start, UChar32 end) {
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((UnicodeSet *)set)->add(start, end);
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}
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static void U_CALLCONV
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_set_addString(USet *set, const UChar *str, int32_t length) {
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((UnicodeSet *)set)->add(UnicodeString((UBool)(length<0), str, length));
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}
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//----------------------------------------------------------------
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// Case folding API
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//----------------------------------------------------------------
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// add the result of a full case mapping to the set
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// use str as a temporary string to avoid constructing one
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static inline void
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addCaseMapping(UnicodeSet &set, int32_t result, const UChar *full, UnicodeString &str) {
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if(result >= 0) {
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if(result > UCASE_MAX_STRING_LENGTH) {
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// add a single-code point case mapping
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set.add(result);
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} else {
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// add a string case mapping from full with length result
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str.setTo((UBool)FALSE, full, result);
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set.add(str);
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}
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}
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// result < 0: the code point mapped to itself, no need to add it
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// see ucase.h
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}
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UnicodeSet& UnicodeSet::closeOver(int32_t attribute) {
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if (isFrozen() || isBogus()) {
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return *this;
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}
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if (attribute & (USET_CASE_INSENSITIVE | USET_ADD_CASE_MAPPINGS)) {
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{
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UnicodeSet foldSet(*this);
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UnicodeString str;
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USetAdder sa = {
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foldSet.toUSet(),
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_set_add,
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_set_addRange,
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_set_addString,
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NULL, // don't need remove()
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NULL // don't need removeRange()
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};
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// start with input set to guarantee inclusion
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// USET_CASE: remove strings because the strings will actually be reduced (folded);
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// therefore, start with no strings and add only those needed
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if ((attribute & USET_CASE_INSENSITIVE) && foldSet.hasStrings()) {
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foldSet.strings->removeAllElements();
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}
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int32_t n = getRangeCount();
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UChar32 result;
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const UChar *full;
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for (int32_t i=0; i<n; ++i) {
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UChar32 start = getRangeStart(i);
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UChar32 end = getRangeEnd(i);
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if (attribute & USET_CASE_INSENSITIVE) {
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// full case closure
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for (UChar32 cp=start; cp<=end; ++cp) {
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ucase_addCaseClosure(cp, &sa);
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}
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} else {
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// add case mappings
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// (does not add long s for regular s, or Kelvin for k, for example)
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for (UChar32 cp=start; cp<=end; ++cp) {
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result = ucase_toFullLower(cp, NULL, NULL, &full, UCASE_LOC_ROOT);
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addCaseMapping(foldSet, result, full, str);
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result = ucase_toFullTitle(cp, NULL, NULL, &full, UCASE_LOC_ROOT);
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addCaseMapping(foldSet, result, full, str);
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result = ucase_toFullUpper(cp, NULL, NULL, &full, UCASE_LOC_ROOT);
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addCaseMapping(foldSet, result, full, str);
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result = ucase_toFullFolding(cp, &full, 0);
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addCaseMapping(foldSet, result, full, str);
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}
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}
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}
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if (hasStrings()) {
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if (attribute & USET_CASE_INSENSITIVE) {
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for (int32_t j=0; j<strings->size(); ++j) {
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str = *(const UnicodeString *) strings->elementAt(j);
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str.foldCase();
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if(!ucase_addStringCaseClosure(str.getBuffer(), str.length(), &sa)) {
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foldSet.add(str); // does not map to code points: add the folded string itself
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}
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}
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} else {
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Locale root("");
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#if !UCONFIG_NO_BREAK_ITERATION
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UErrorCode status = U_ZERO_ERROR;
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BreakIterator *bi = BreakIterator::createWordInstance(root, status);
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if (U_SUCCESS(status)) {
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#endif
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const UnicodeString *pStr;
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for (int32_t j=0; j<strings->size(); ++j) {
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pStr = (const UnicodeString *) strings->elementAt(j);
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(str = *pStr).toLower(root);
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foldSet.add(str);
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#if !UCONFIG_NO_BREAK_ITERATION
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(str = *pStr).toTitle(bi, root);
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foldSet.add(str);
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#endif
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(str = *pStr).toUpper(root);
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foldSet.add(str);
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(str = *pStr).foldCase();
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foldSet.add(str);
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}
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#if !UCONFIG_NO_BREAK_ITERATION
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}
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delete bi;
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#endif
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}
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}
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*this = foldSet;
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}
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}
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return *this;
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}
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U_NAMESPACE_END
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