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arangodb/lib/Basics/Utf8Helper.cpp

269 lines
7.3 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// @brief Utf8/Utf16 Helper class
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2004-2012 triagens GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Frank Celler
/// @author Achim Brandt
/// @author Copyright 2010-2012, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "Utf8Helper.h"
#ifdef TRI_HAVE_ICU
#include "unicode/normalizer2.h"
#else
#include "string.h"
#endif
#include "Logger/Logger.h"
using namespace triagens::basics;
using namespace std;
Utf8Helper Utf8Helper::DefaultUtf8Helper;
// -----------------------------------------------------------------------------
// --SECTION-- constructors and destructors
// -----------------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup UTF8
/// @{
////////////////////////////////////////////////////////////////////////////////
Utf8Helper::Utf8Helper () : _coll(0) {
setCollatorLanguage("");
}
Utf8Helper::Utf8Helper (const string& lang) : _coll(0) {
setCollatorLanguage(lang);
}
Utf8Helper::~Utf8Helper () {
if (_coll) {
delete _coll;
}
}
/*
int Utf8Helper::compareUtf8 (const char* left, size_t leftLength, const char* right, size_t rightLength) {
#ifdef TRI_HAVE_ICU
if (!_coll) {
LOGGER_ERROR << "no Collator in Utf8Helper::compareUtf8()!";
return 0;
}
UErrorCode status = U_ZERO_ERROR;
int result = _coll->compareUTF8(StringPiece(left, leftLength), StringPiece(right, rightLength), status);
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::compareUTF8(...): " << u_errorName(status);
return 0;
}
return result;
#else
if (leftLength == rightLength) {
return memcmp((const void*)left, (const void*)right, leftLength);
}
int result = memcmp((const void*)left, (const void*)right, leftLength < rightLength ? leftLength : rightLength);
if (result == 0) {
if (leftLength < rightLength) {
return -1;
}
return 1;
}
return result;
#endif
}
*/
int Utf8Helper::compareUtf8 (const char* left, const char* right) {
#ifdef TRI_HAVE_ICU
if (!_coll) {
LOGGER_ERROR << "no Collator in Utf8Helper::compareUtf8()!";
return (strcmp(left, right));
}
UErrorCode status = U_ZERO_ERROR;
int result = _coll->compareUTF8(StringPiece(left), StringPiece(right), status);
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::compareUTF8(...): " << u_errorName(status);
return (strcmp(left, right));
}
return result;
#else
return (strcmp(left, right));
#endif
}
int Utf8Helper::compareUtf16 (const uint16_t* left, size_t leftLength, const uint16_t* right, size_t rightLength) {
#ifdef TRI_HAVE_ICU
if (!_coll) {
LOGGER_ERROR << "no Collator in Utf8Helper::compareUtf16()!";
#endif
if (leftLength == rightLength) {
return memcmp((const void*)left, (const void*)right, leftLength * 2);
}
int result = memcmp((const void*)left, (const void*)right, leftLength < rightLength ? leftLength * 2 : rightLength * 2);
if (result == 0) {
if (leftLength < rightLength) {
return -1;
}
return 1;
}
return result;
#ifdef TRI_HAVE_ICU
}
return _coll->compare((const UChar *)left, leftLength, (const UChar *)right, rightLength);
#endif
}
void Utf8Helper::setCollatorLanguage (const string& lang) {
#ifdef TRI_HAVE_ICU
UErrorCode status = U_ZERO_ERROR;
if (_coll) {
ULocDataLocaleType type = ULOC_ACTUAL_LOCALE;
const Locale& locale = _coll->getLocale(type, status);
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::getLocale(...): " << u_errorName(status);
return;
}
if (lang == locale.getName()) {
return;
}
}
Collator* coll;
if (lang == "") {
// get default collator for empty language
coll = Collator::createInstance(status);
}
else {
Locale locale(lang.c_str());
coll = Collator::createInstance(locale, status);
}
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::createInstance(): " << u_errorName(status);
if (coll) {
delete coll;
}
return;
}
// set the default attributes for sorting:
coll->setAttribute(UCOL_CASE_FIRST, UCOL_UPPER_FIRST, status); // A < a
coll->setAttribute(UCOL_NORMALIZATION_MODE, UCOL_OFF, status); // no normalization
coll->setAttribute(UCOL_STRENGTH, UCOL_IDENTICAL, status); // UCOL_IDENTICAL, UCOL_PRIMARY, UCOL_SECONDARY, UCOL_TERTIARY
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::setAttribute(...): " << u_errorName(status);
delete coll;
return;
}
if (_coll) {
delete _coll;
}
_coll = coll;
#endif
}
string Utf8Helper::getCollatorLanguage () {
#ifdef TRI_HAVE_ICU
if (_coll) {
UErrorCode status = U_ZERO_ERROR;
ULocDataLocaleType type = ULOC_VALID_LOCALE;
const Locale& locale = _coll->getLocale(type, status);
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::getLocale(...): " << u_errorName(status);
return "";
}
return locale.getLanguage();
}
#endif
return "";
}
string Utf8Helper::getCollatorCountry () {
#ifdef TRI_HAVE_ICU
if (_coll) {
UErrorCode status = U_ZERO_ERROR;
ULocDataLocaleType type = ULOC_VALID_LOCALE;
const Locale& locale = _coll->getLocale(type, status);
if(U_FAILURE(status)) {
LOGGER_ERROR << "error in Collator::getLocale(...): " << u_errorName(status);
return "";
}
return locale.getCountry();
}
#endif
return "";
}
#ifdef __cplusplus
extern "C" {
#endif
////////////////////////////////////////////////////////////////////////////////
/// @brief compare two utf16 strings
////////////////////////////////////////////////////////////////////////////////
int TR_compare_utf16 (const uint16_t* left, size_t leftLength, const uint16_t* right, size_t rightLength) {
return Utf8Helper::DefaultUtf8Helper.compareUtf16(left, leftLength, right, rightLength);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief compare two utf8 strings
////////////////////////////////////////////////////////////////////////////////
int TR_compare_utf8 (const char* left, const char* right) {
return Utf8Helper::DefaultUtf8Helper.compareUtf8(left, right);
}
#ifdef __cplusplus
}
#endif
////////////////////////////////////////////////////////////////////////////////
/// @}
////////////////////////////////////////////////////////////////////////////////
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