mirror of https://gitee.com/bigwinds/arangodb
978 lines
29 KiB
C++
978 lines
29 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Frank Celler
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/// @author Achim Brandt
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////////////////////////////////////////////////////////////////////////////////
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#include "Utf8Helper.h"
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#include "Basics/Logger.h"
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#include "Basics/tri-strings.h"
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#include "unicode/normalizer2.h"
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#include "unicode/brkiter.h"
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#include "unicode/ucasemap.h"
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#include "unicode/uclean.h"
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#include "unicode/unorm2.h"
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#include "unicode/ustdio.h"
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#ifdef _WIN32
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#include "Basics/win-utils.h"
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#endif
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using namespace arangodb::basics;
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Utf8Helper Utf8Helper::DefaultUtf8Helper;
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Utf8Helper::Utf8Helper(std::string const& lang) : _coll(nullptr) {
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setCollatorLanguage(lang);
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}
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Utf8Helper::Utf8Helper() : Utf8Helper("") {}
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Utf8Helper::~Utf8Helper() {
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if (_coll) {
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delete _coll;
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if (this == &DefaultUtf8Helper) {
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u_cleanup();
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}
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}
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}
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int Utf8Helper::compareUtf8(char const* left, char const* right) const {
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TRI_ASSERT(left != nullptr);
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TRI_ASSERT(right != nullptr);
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if (!_coll) {
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LOG(ERR) << "no Collator in Utf8Helper::compareUtf8()!";
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return (strcmp(left, right));
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}
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UErrorCode status = U_ZERO_ERROR;
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int result =
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_coll->compareUTF8(StringPiece(left), StringPiece(right), status);
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::compareUTF8(...): " << u_errorName(status);
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return (strcmp(left, right));
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}
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return result;
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}
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int Utf8Helper::compareUtf8(char const* left, size_t leftLength,
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char const* right, size_t rightLength) const {
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TRI_ASSERT(left != nullptr);
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TRI_ASSERT(right != nullptr);
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if (!_coll) {
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LOG(ERR) << "no Collator in Utf8Helper::compareUtf8()!";
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return (strcmp(left, right));
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}
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UErrorCode status = U_ZERO_ERROR;
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int result =
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_coll->compareUTF8(StringPiece(left, (int32_t)leftLength),
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StringPiece(right, (int32_t)rightLength), status);
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::compareUTF8(...): " << u_errorName(status);
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return (strcmp(left, right));
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}
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return result;
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}
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int Utf8Helper::compareUtf16(uint16_t const* left, size_t leftLength,
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uint16_t const* right, size_t rightLength) const {
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TRI_ASSERT(left != nullptr);
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TRI_ASSERT(right != nullptr);
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if (!_coll) {
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LOG(ERR) << "no Collator in Utf8Helper::compareUtf16()!";
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if (leftLength == rightLength) {
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return memcmp((const void*)left, (const void*)right, leftLength * 2);
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}
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int result =
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memcmp((const void*)left, (const void*)right,
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leftLength < rightLength ? leftLength * 2 : rightLength * 2);
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if (result == 0) {
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if (leftLength < rightLength) {
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return -1;
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}
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return 1;
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}
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return result;
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}
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// ..........................................................................
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// Take note here: we are assuming that the ICU type UChar is two bytes.
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// There is no guarantee that this will be the case on all platforms and
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// compilers.
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// ..........................................................................
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return _coll->compare((const UChar*)left, (int32_t)leftLength,
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(const UChar*)right, (int32_t)rightLength);
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}
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bool Utf8Helper::setCollatorLanguage(std::string const& lang) {
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#ifdef _WIN32
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TRI_FixIcuDataEnv();
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#endif
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UErrorCode status = U_ZERO_ERROR;
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if (_coll) {
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ULocDataLocaleType type = ULOC_ACTUAL_LOCALE;
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const Locale& locale = _coll->getLocale(type, status);
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::getLocale(...): " << u_errorName(status);
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return false;
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}
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if (lang == locale.getName()) {
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return true;
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}
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}
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Collator* coll;
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if (lang == "") {
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// get default collator for empty language
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coll = Collator::createInstance(status);
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} else {
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Locale locale(lang.c_str());
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coll = Collator::createInstance(locale, status);
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}
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::createInstance(): " << u_errorName(status);
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if (coll) {
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delete coll;
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}
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return false;
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}
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// set the default attributes for sorting:
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coll->setAttribute(UCOL_CASE_FIRST, UCOL_UPPER_FIRST, status); // A < a
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coll->setAttribute(UCOL_NORMALIZATION_MODE, UCOL_OFF,
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status); // no normalization
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coll->setAttribute(
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UCOL_STRENGTH, UCOL_IDENTICAL,
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status); // UCOL_IDENTICAL, UCOL_PRIMARY, UCOL_SECONDARY, UCOL_TERTIARY
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::setAttribute(...): " << u_errorName(status);
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delete coll;
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return false;
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}
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if (_coll) {
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delete _coll;
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}
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_coll = coll;
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return true;
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}
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std::string Utf8Helper::getCollatorLanguage() {
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if (_coll) {
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UErrorCode status = U_ZERO_ERROR;
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ULocDataLocaleType type = ULOC_VALID_LOCALE;
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const Locale& locale = _coll->getLocale(type, status);
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::getLocale(...): " << u_errorName(status);
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return "";
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}
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return locale.getLanguage();
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}
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return "";
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}
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std::string Utf8Helper::getCollatorCountry() {
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if (_coll) {
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UErrorCode status = U_ZERO_ERROR;
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ULocDataLocaleType type = ULOC_VALID_LOCALE;
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const Locale& locale = _coll->getLocale(type, status);
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in Collator::getLocale(...): " << u_errorName(status);
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return "";
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}
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return locale.getCountry();
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}
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return "";
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Lowercase the characters in a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
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std::string Utf8Helper::toLowerCase(std::string const& src) {
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int32_t utf8len = 0;
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char* utf8 = tolower(TRI_UNKNOWN_MEM_ZONE, src.c_str(), (int32_t)src.length(),
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utf8len);
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if (utf8 == nullptr) {
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return std::string("");
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}
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std::string result(utf8, utf8len);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, utf8);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Lowercase the characters in a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
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char* Utf8Helper::tolower(TRI_memory_zone_t* zone, char const* src,
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int32_t srcLength, int32_t& dstLength) {
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char* utf8_dest = nullptr;
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if (src == nullptr || srcLength == 0) {
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utf8_dest = (char*)TRI_Allocate(zone, sizeof(char), false);
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if (utf8_dest != nullptr) {
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utf8_dest[0] = '\0';
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}
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dstLength = 0;
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return utf8_dest;
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}
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uint32_t options = U_FOLD_CASE_DEFAULT;
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UErrorCode status = U_ZERO_ERROR;
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std::string locale = getCollatorLanguage();
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LocalUCaseMapPointer csm(ucasemap_open(locale.c_str(), options, &status));
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in ucasemap_open(...): " << u_errorName(status);
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} else {
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utf8_dest =
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(char*)TRI_Allocate(zone, (srcLength + 1) * sizeof(char), false);
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if (utf8_dest == nullptr) {
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return nullptr;
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}
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dstLength = ucasemap_utf8ToLower(csm.getAlias(), utf8_dest, srcLength + 1,
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src, srcLength, &status);
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if (status == U_BUFFER_OVERFLOW_ERROR) {
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status = U_ZERO_ERROR;
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TRI_Free(zone, utf8_dest);
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utf8_dest =
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(char*)TRI_Allocate(zone, (dstLength + 1) * sizeof(char), false);
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if (utf8_dest == nullptr) {
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return nullptr;
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}
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dstLength = ucasemap_utf8ToLower(csm.getAlias(), utf8_dest, dstLength + 1,
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src, srcLength, &status);
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}
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in ucasemap_utf8ToLower(...): " << u_errorName(status);
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TRI_Free(zone, utf8_dest);
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} else {
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return utf8_dest;
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}
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}
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utf8_dest = TRI_LowerAsciiString(zone, src);
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if (utf8_dest != nullptr) {
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dstLength = (int32_t)strlen(utf8_dest);
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}
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return utf8_dest;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Uppercase the characters in a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
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std::string Utf8Helper::toUpperCase(std::string const& src) {
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int32_t utf8len = 0;
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char* utf8 = toupper(TRI_UNKNOWN_MEM_ZONE, src.c_str(), (int32_t)src.length(),
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utf8len);
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if (utf8 == nullptr) {
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return std::string("");
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}
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std::string result(utf8, utf8len);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, utf8);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Lowercase the characters in a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
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char* Utf8Helper::toupper(TRI_memory_zone_t* zone, char const* src,
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int32_t srcLength, int32_t& dstLength) {
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char* utf8_dest = nullptr;
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if (src == nullptr || srcLength == 0) {
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utf8_dest = (char*)TRI_Allocate(zone, sizeof(char), false);
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if (utf8_dest != nullptr) {
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utf8_dest[0] = '\0';
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}
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dstLength = 0;
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return utf8_dest;
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}
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uint32_t options = U_FOLD_CASE_DEFAULT;
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UErrorCode status = U_ZERO_ERROR;
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std::string locale = getCollatorLanguage();
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LocalUCaseMapPointer csm(ucasemap_open(locale.c_str(), options, &status));
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in ucasemap_open(...): " << u_errorName(status);
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} else {
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utf8_dest =
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(char*)TRI_Allocate(zone, (srcLength + 1) * sizeof(char), false);
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if (utf8_dest == nullptr) {
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return nullptr;
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}
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dstLength = ucasemap_utf8ToUpper(csm.getAlias(), utf8_dest, srcLength, src,
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srcLength, &status);
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if (status == U_BUFFER_OVERFLOW_ERROR) {
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status = U_ZERO_ERROR;
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TRI_Free(zone, utf8_dest);
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utf8_dest =
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(char*)TRI_Allocate(zone, (dstLength + 1) * sizeof(char), false);
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if (utf8_dest == nullptr) {
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return nullptr;
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}
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dstLength = ucasemap_utf8ToUpper(csm.getAlias(), utf8_dest, dstLength + 1,
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src, srcLength, &status);
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}
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if (U_FAILURE(status)) {
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LOG(ERR) << "error in ucasemap_utf8ToUpper(...): " << u_errorName(status);
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TRI_Free(zone, utf8_dest);
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} else {
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return utf8_dest;
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}
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}
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utf8_dest = TRI_UpperAsciiString(zone, src);
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if (utf8_dest != nullptr) {
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dstLength = (int32_t)strlen(utf8_dest);
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}
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return utf8_dest;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Extract the words from a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
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TRI_vector_string_t* Utf8Helper::getWords(char const* text, size_t textLength,
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size_t minimalLength,
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size_t maximalLength,
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bool lowerCase) {
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TRI_vector_string_t* words;
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UErrorCode status = U_ZERO_ERROR;
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UnicodeString word;
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if (textLength == 0) {
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// input text is empty
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return nullptr;
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}
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if (textLength < minimalLength) {
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// input text is shorter than required minimum length
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return nullptr;
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}
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size_t textUtf16Length = 0;
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UChar* textUtf16 = nullptr;
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if (lowerCase) {
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// lower case string
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int32_t lowerLength = 0;
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char* lower =
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tolower(TRI_UNKNOWN_MEM_ZONE, text, (int32_t)textLength, lowerLength);
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if (lower == nullptr) {
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// out of memory
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return nullptr;
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}
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if (lowerLength == 0) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, lower);
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return nullptr;
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}
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textUtf16 = TRI_Utf8ToUChar(TRI_UNKNOWN_MEM_ZONE, lower, lowerLength,
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&textUtf16Length);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, lower);
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} else {
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textUtf16 = TRI_Utf8ToUChar(TRI_UNKNOWN_MEM_ZONE, text, (int32_t)textLength,
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&textUtf16Length);
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}
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if (textUtf16 == nullptr) {
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return nullptr;
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}
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ULocDataLocaleType type = ULOC_VALID_LOCALE;
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const Locale& locale = _coll->getLocale(type, status);
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if (U_FAILURE(status)) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
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LOG(ERR) << "error in Collator::getLocale(...): " << u_errorName(status);
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return nullptr;
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}
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UChar* tempUtf16 = (UChar*)TRI_Allocate(
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TRI_UNKNOWN_MEM_ZONE, (textUtf16Length + 1) * sizeof(UChar), false);
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if (tempUtf16 == nullptr) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
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return nullptr;
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}
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words = (TRI_vector_string_t*)TRI_Allocate(
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TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_vector_string_t), false);
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if (words == nullptr) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, tempUtf16);
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return nullptr;
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}
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// estimate an initial vector size. this is not accurate, but setting the
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// initial size to some
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// value in the correct order of magnitude will save a lot of vector
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// reallocations later
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size_t initialWordCount = textLength / (2 * (minimalLength + 1));
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if (initialWordCount < 32) {
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// alloc at least 32 pointers (= 256b)
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initialWordCount = 32;
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} else if (initialWordCount > 8192) {
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// alloc at most 8192 pointers (= 64kb)
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initialWordCount = 8192;
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}
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TRI_InitVectorString2(words, TRI_UNKNOWN_MEM_ZONE, initialWordCount);
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BreakIterator* wordIterator =
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BreakIterator::createWordInstance(locale, status);
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UnicodeString utext(textUtf16);
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wordIterator->setText(utext);
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int32_t start = wordIterator->first();
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for (int32_t end = wordIterator->next(); end != BreakIterator::DONE;
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start = end, end = wordIterator->next()) {
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size_t tempUtf16Length = (size_t)(end - start);
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// end - start = word length
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if (tempUtf16Length >= minimalLength) {
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size_t chunkLength = tempUtf16Length;
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if (chunkLength > maximalLength) {
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chunkLength = maximalLength;
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}
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utext.extractBetween(start, (int32_t)(start + chunkLength), tempUtf16, 0);
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size_t utf8WordLength;
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char* utf8Word = TRI_UCharToUtf8(TRI_UNKNOWN_MEM_ZONE, tempUtf16,
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chunkLength, &utf8WordLength);
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if (utf8Word != nullptr) {
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TRI_PushBackVectorString(words, utf8Word);
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}
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}
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}
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delete wordIterator;
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, tempUtf16);
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if (words->_length == 0) {
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// no words found
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TRI_FreeVectorString(TRI_UNKNOWN_MEM_ZONE, words);
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return nullptr;
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}
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return words;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Extract the words from a UTF-8 string.
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////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool Utf8Helper::getWords(TRI_vector_string_t*& words, char const* text,
|
|
size_t textLength, size_t minimalLength,
|
|
size_t maximalLength, bool lowerCase) {
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
UnicodeString word;
|
|
|
|
if (textLength == 0) {
|
|
// input text is empty
|
|
return true;
|
|
}
|
|
|
|
if (textLength < minimalLength) {
|
|
// input text is shorter than required minimum length
|
|
return true;
|
|
}
|
|
|
|
size_t textUtf16Length = 0;
|
|
UChar* textUtf16 = nullptr;
|
|
|
|
if (lowerCase) {
|
|
// lower case string
|
|
int32_t lowerLength = 0;
|
|
char* lower =
|
|
tolower(TRI_UNKNOWN_MEM_ZONE, text, (int32_t)textLength, lowerLength);
|
|
|
|
if (lower == nullptr) {
|
|
// out of memory
|
|
return false;
|
|
}
|
|
|
|
if (lowerLength == 0) {
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, lower);
|
|
return false;
|
|
}
|
|
|
|
textUtf16 = TRI_Utf8ToUChar(TRI_UNKNOWN_MEM_ZONE, lower, lowerLength,
|
|
&textUtf16Length);
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, lower);
|
|
} else {
|
|
textUtf16 = TRI_Utf8ToUChar(TRI_UNKNOWN_MEM_ZONE, text, (int32_t)textLength,
|
|
&textUtf16Length);
|
|
}
|
|
|
|
if (textUtf16 == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
ULocDataLocaleType type = ULOC_VALID_LOCALE;
|
|
const Locale& locale = _coll->getLocale(type, status);
|
|
|
|
if (U_FAILURE(status)) {
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
|
|
LOG(ERR) << "error in Collator::getLocale(...): " << u_errorName(status);
|
|
return false;
|
|
}
|
|
|
|
UChar* tempUtf16 = (UChar*)TRI_Allocate(
|
|
TRI_UNKNOWN_MEM_ZONE, (textUtf16Length + 1) * sizeof(UChar), false);
|
|
|
|
if (tempUtf16 == nullptr) {
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
|
|
return false;
|
|
}
|
|
|
|
bool created = false;
|
|
|
|
if (words == nullptr) {
|
|
words = (TRI_vector_string_t*)TRI_Allocate(
|
|
TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_vector_string_t), false);
|
|
created = true;
|
|
}
|
|
|
|
if (words == nullptr) {
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, tempUtf16);
|
|
return false;
|
|
}
|
|
|
|
if (created) {
|
|
// estimate an initial vector size. this is not accurate, but setting the
|
|
// initial size to some
|
|
// value in the correct order of magnitude will save a lot of vector
|
|
// reallocations later
|
|
size_t initialWordCount = textLength / (2 * (minimalLength + 1));
|
|
if (initialWordCount < 32) {
|
|
// alloc at least 32 pointers (= 256b)
|
|
initialWordCount = 32;
|
|
} else if (initialWordCount > 8192) {
|
|
// alloc at most 8192 pointers (= 64kb)
|
|
initialWordCount = 8192;
|
|
}
|
|
TRI_InitVectorString2(words, TRI_UNKNOWN_MEM_ZONE, initialWordCount);
|
|
}
|
|
|
|
BreakIterator* wordIterator =
|
|
BreakIterator::createWordInstance(locale, status);
|
|
UnicodeString utext(textUtf16);
|
|
|
|
wordIterator->setText(utext);
|
|
int32_t start = wordIterator->first();
|
|
for (int32_t end = wordIterator->next(); end != BreakIterator::DONE;
|
|
start = end, end = wordIterator->next()) {
|
|
size_t tempUtf16Length = (size_t)(end - start);
|
|
// end - start = word length
|
|
if (tempUtf16Length >= minimalLength) {
|
|
size_t chunkLength = tempUtf16Length;
|
|
if (chunkLength > maximalLength) {
|
|
chunkLength = maximalLength;
|
|
}
|
|
utext.extractBetween(start, (int32_t)(start + chunkLength), tempUtf16, 0);
|
|
|
|
size_t utf8WordLength;
|
|
char* utf8Word = TRI_UCharToUtf8(TRI_UNKNOWN_MEM_ZONE, tempUtf16,
|
|
chunkLength, &utf8WordLength);
|
|
if (utf8Word != nullptr) {
|
|
TRI_PushBackVectorString(words, utf8Word);
|
|
}
|
|
}
|
|
}
|
|
|
|
delete wordIterator;
|
|
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, textUtf16);
|
|
TRI_Free(TRI_UNKNOWN_MEM_ZONE, tempUtf16);
|
|
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief builds a regex matcher for the specified pattern
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RegexMatcher* Utf8Helper::buildMatcher(std::string const& pattern) {
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
|
|
auto matcher = std::make_unique<RegexMatcher>(
|
|
UnicodeString::fromUTF8(pattern), 0, status);
|
|
if (U_FAILURE(status)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return matcher.release();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not value matches a regex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool Utf8Helper::matches(RegexMatcher* matcher, std::string const& value,
|
|
bool& error) {
|
|
return matches(matcher, value.c_str(), value.size(), error);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief whether or not value matches a regex
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool Utf8Helper::matches(RegexMatcher* matcher, char const* value,
|
|
size_t valueLength, bool& error) {
|
|
TRI_ASSERT(value != nullptr);
|
|
UnicodeString v = UnicodeString::fromUTF8(
|
|
StringPiece(value, static_cast<int32_t>(valueLength)));
|
|
|
|
matcher->reset(v);
|
|
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
error = false;
|
|
|
|
TRI_ASSERT(matcher != nullptr);
|
|
UBool result = matcher->matches(status);
|
|
if (U_FAILURE(status)) {
|
|
error = true;
|
|
}
|
|
|
|
return (result ? true : false);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief compare two utf8 strings
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int TRI_compare_utf8(char const* left, char const* right) {
|
|
TRI_ASSERT(left != nullptr);
|
|
TRI_ASSERT(right != nullptr);
|
|
return Utf8Helper::DefaultUtf8Helper.compareUtf8(left, right);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief compare two utf8 strings
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int TRI_compare_utf8(char const* left, size_t leftLength, char const* right,
|
|
size_t rightLength) {
|
|
TRI_ASSERT(left != nullptr);
|
|
TRI_ASSERT(right != nullptr);
|
|
return Utf8Helper::DefaultUtf8Helper.compareUtf8(left, leftLength, right,
|
|
rightLength);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Lowercase the characters in a UTF-8 string (implemented in
|
|
/// Basic/Utf8Helper.cpp)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
char* TRI_tolower_utf8(TRI_memory_zone_t* zone, char const* src,
|
|
int32_t srcLength, int32_t* dstLength) {
|
|
return Utf8Helper::DefaultUtf8Helper.tolower(zone, src, srcLength,
|
|
*dstLength);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Get words of an UTF-8 string (implemented in Basic/Utf8Helper.cpp)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TRI_vector_string_t* TRI_get_words(char const* text, size_t textLength,
|
|
size_t minimalWordLength,
|
|
size_t maximalWordLength, bool lowerCase) {
|
|
return Utf8Helper::DefaultUtf8Helper.getWords(
|
|
text, textLength, minimalWordLength, maximalWordLength, lowerCase);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Get words of an UTF-8 string (implemented in Basic/Utf8Helper.cpp)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool TRI_get_words(TRI_vector_string_t*& words, char const* text,
|
|
size_t textLength, size_t minimalWordLength,
|
|
size_t maximalWordLength, bool lowerCase) {
|
|
return Utf8Helper::DefaultUtf8Helper.getWords(
|
|
words, text, textLength, minimalWordLength, maximalWordLength, lowerCase);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief convert a utf-8 string to a uchar (utf-16)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
UChar* TRI_Utf8ToUChar(TRI_memory_zone_t* zone, char const* utf8,
|
|
size_t inLength, size_t* outLength) {
|
|
int32_t utf16Length;
|
|
|
|
// 1. convert utf8 string to utf16
|
|
// calculate utf16 string length
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
u_strFromUTF8(nullptr, 0, &utf16Length, utf8, (int32_t)inLength, &status);
|
|
if (status != U_BUFFER_OVERFLOW_ERROR) {
|
|
return nullptr;
|
|
}
|
|
|
|
UChar* utf16 =
|
|
(UChar*)TRI_Allocate(zone, (utf16Length + 1) * sizeof(UChar), false);
|
|
if (utf16 == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
// now convert
|
|
status = U_ZERO_ERROR;
|
|
// the +1 will append a 0 byte at the end
|
|
u_strFromUTF8(utf16, utf16Length + 1, nullptr, utf8, (int32_t)inLength,
|
|
&status);
|
|
if (status != U_ZERO_ERROR) {
|
|
TRI_Free(zone, utf16);
|
|
return nullptr;
|
|
}
|
|
|
|
*outLength = (size_t)utf16Length;
|
|
|
|
return utf16;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief convert a uchar (utf-16) to a utf-8 string
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
char* TRI_UCharToUtf8(TRI_memory_zone_t* zone, UChar const* uchar,
|
|
size_t inLength, size_t* outLength) {
|
|
int32_t utf8Length;
|
|
|
|
// calculate utf8 string length
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
u_strToUTF8(nullptr, 0, &utf8Length, uchar, (int32_t)inLength, &status);
|
|
|
|
if (status != U_ZERO_ERROR && status != U_BUFFER_OVERFLOW_ERROR) {
|
|
return nullptr;
|
|
}
|
|
|
|
char* utf8 = static_cast<char*>(TRI_Allocate(zone, utf8Length + 1, false));
|
|
|
|
if (utf8 == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
// convert to utf8
|
|
status = U_ZERO_ERROR;
|
|
// the +1 will append a 0 byte at the end
|
|
u_strToUTF8(utf8, utf8Length + 1, nullptr, uchar, (int32_t)inLength, &status);
|
|
|
|
if (status != U_ZERO_ERROR) {
|
|
TRI_Free(zone, utf8);
|
|
return nullptr;
|
|
}
|
|
|
|
*outLength = (size_t)utf8Length;
|
|
|
|
return utf8;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief normalize an utf8 string (NFC)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
char* TRI_normalize_utf8_to_NFC(TRI_memory_zone_t* zone, char const* utf8,
|
|
size_t inLength, size_t* outLength) {
|
|
size_t utf16Length;
|
|
|
|
*outLength = 0;
|
|
char* utf8Dest;
|
|
|
|
if (inLength == 0) {
|
|
utf8Dest = static_cast<char*>(TRI_Allocate(zone, sizeof(char), false));
|
|
|
|
if (utf8Dest != nullptr) {
|
|
utf8Dest[0] = '\0';
|
|
}
|
|
return utf8Dest;
|
|
}
|
|
|
|
UChar* utf16 = TRI_Utf8ToUChar(zone, utf8, inLength, &utf16Length);
|
|
|
|
if (utf16 == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
// continue in TR_normalize_utf16_to_NFC
|
|
utf8Dest = TRI_normalize_utf16_to_NFC(zone, (uint16_t const*)utf16,
|
|
(int32_t)utf16Length, outLength);
|
|
TRI_Free(zone, utf16);
|
|
|
|
return utf8Dest;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief normalize an utf8 string (NFC)
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
char* TRI_normalize_utf16_to_NFC(TRI_memory_zone_t* zone, uint16_t const* utf16,
|
|
size_t inLength, size_t* outLength) {
|
|
*outLength = 0;
|
|
char* utf8Dest;
|
|
|
|
if (inLength == 0) {
|
|
utf8Dest = static_cast<char*>(TRI_Allocate(zone, sizeof(char), false));
|
|
if (utf8Dest != nullptr) {
|
|
utf8Dest[0] = '\0';
|
|
}
|
|
return utf8Dest;
|
|
}
|
|
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
UNormalizer2 const* norm2 =
|
|
unorm2_getInstance(nullptr, "nfc", UNORM2_COMPOSE, &status);
|
|
|
|
if (status != U_ZERO_ERROR) {
|
|
return nullptr;
|
|
}
|
|
|
|
// normalize UChar (UTF-16)
|
|
UChar* utf16Dest;
|
|
bool mustFree;
|
|
char buffer[64];
|
|
|
|
if (inLength < sizeof(buffer) / sizeof(UChar)) {
|
|
// use a static buffer
|
|
utf16Dest = (UChar*)&buffer[0];
|
|
mustFree = false;
|
|
} else {
|
|
// use dynamic memory
|
|
utf16Dest =
|
|
(UChar*)TRI_Allocate(zone, (inLength + 1) * sizeof(UChar), false);
|
|
if (utf16Dest == nullptr) {
|
|
return nullptr;
|
|
}
|
|
mustFree = true;
|
|
}
|
|
|
|
size_t overhead = 0;
|
|
int32_t utf16DestLength;
|
|
|
|
while (true) {
|
|
status = U_ZERO_ERROR;
|
|
utf16DestLength =
|
|
unorm2_normalize(norm2, (UChar*)utf16, (int32_t)inLength, utf16Dest,
|
|
(int32_t)(inLength + overhead + 1), &status);
|
|
|
|
if (status == U_ZERO_ERROR) {
|
|
break;
|
|
}
|
|
|
|
if (status == U_BUFFER_OVERFLOW_ERROR ||
|
|
status == U_STRING_NOT_TERMINATED_WARNING) {
|
|
// output buffer was too small. now re-try with a bigger buffer (inLength
|
|
// + overhead size)
|
|
if (mustFree) {
|
|
// free original buffer first so we don't leak
|
|
TRI_Free(zone, utf16Dest);
|
|
mustFree = false;
|
|
}
|
|
|
|
if (overhead == 0) {
|
|
// set initial overhead size
|
|
if (inLength < 256) {
|
|
overhead = 16;
|
|
} else if (inLength < 4096) {
|
|
overhead = 128;
|
|
} else {
|
|
overhead = 256;
|
|
}
|
|
} else {
|
|
// use double buffer size
|
|
overhead += overhead;
|
|
|
|
if (overhead >= 1024 * 1024) {
|
|
// enough is enough
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
utf16Dest = (UChar*)TRI_Allocate(
|
|
zone, (inLength + overhead + 1) * sizeof(UChar), false);
|
|
|
|
if (utf16Dest != nullptr) {
|
|
// got new memory. now try again with the adjusted, bigger buffer
|
|
mustFree = true;
|
|
continue;
|
|
}
|
|
// fall-through intentional
|
|
}
|
|
|
|
if (mustFree) {
|
|
TRI_Free(zone, utf16Dest);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// Convert data back from UChar (UTF-16) to UTF-8
|
|
utf8Dest =
|
|
TRI_UCharToUtf8(zone, utf16Dest, (size_t)utf16DestLength, outLength);
|
|
|
|
if (mustFree) {
|
|
TRI_Free(zone, utf16Dest);
|
|
}
|
|
|
|
return utf8Dest;
|
|
}
|