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author | Denis Dzyubenko <denis.dzyubenko@nokia.com> | 2011-04-12 12:48:13 (GMT) |
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committer | Denis Dzyubenko <denis.dzyubenko@nokia.com> | 2011-04-12 13:39:00 (GMT) |
commit | 46163663e956b988719563eae18773a2dedd424e (patch) | |
tree | 1064cae633e56f66f7a1cc49de4720f3807284e0 /src/corelib/tools/qlocale_icu.cpp | |
parent | 04d1cbce75e77392077ce4ae014fe8774c32a8fc (diff) | |
download | Qt-46163663e956b988719563eae18773a2dedd424e.zip Qt-46163663e956b988719563eae18773a2dedd424e.tar.gz Qt-46163663e956b988719563eae18773a2dedd424e.tar.bz2 |
Added support for libICU for collation and toLower/toUpper.
This patch uses icu to do string collation via QString::localeAwareCompare
function and for QString::toLower/toUpper - which is important e.g. for turkish
locales where uppercased 'i' is not a latin 'I'.
Based on the patch by Harald Fernengel
Reviewed-by: Harald Fernengel
Reviewed-by: Zeno Albisser
Diffstat (limited to 'src/corelib/tools/qlocale_icu.cpp')
-rw-r--r-- | src/corelib/tools/qlocale_icu.cpp | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/corelib/tools/qlocale_icu.cpp b/src/corelib/tools/qlocale_icu.cpp new file mode 100644 index 0000000..0e283dd --- /dev/null +++ b/src/corelib/tools/qlocale_icu.cpp @@ -0,0 +1,224 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qglobal.h" +#include "qlibrary.h" +#include "qdebug.h" + +#include "unicode/uversion.h" +#include "unicode/ucol.h" + +QT_BEGIN_NAMESPACE + +typedef UCollator *(*Ptr_ucol_open)(const char *loc, UErrorCode *status); +typedef void (*Ptr_ucol_close)(UCollator *coll); +typedef UCollationResult (*Ptr_ucol_strcoll)(const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength); +typedef int32_t (*Ptr_u_strToCase)(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode); + +static Ptr_ucol_open ptr_ucol_open = 0; +static Ptr_ucol_strcoll ptr_ucol_strcoll = 0; +static Ptr_ucol_close ptr_ucol_close = 0; +static Ptr_u_strToCase ptr_u_strToUpper = 0; +static Ptr_u_strToCase ptr_u_strToLower = 0; + +enum LibLoadStatus +{ + ErrorLoading = -1, + NotLoaded = 0, + Loaded = 1 +}; + +static LibLoadStatus status = NotLoaded; + +static UCollator *icuCollator = 0; + +#define STRINGIFY2(x) #x +#define STRINGIFY(x) STRINGIFY2(x) + +bool qt_initIcu(const QString &localeString) +{ + if (status == ErrorLoading) + return false; + + if (status == NotLoaded) { + + // resolve libicui18n + QLibrary lib(QLatin1String("icui18n"), QLatin1String(U_ICU_VERSION_SHORT)); + if (!lib.load()) { + qWarning() << "Unable to load library icui18n" << lib.errorString(); + status = ErrorLoading; + return false; + } + + ptr_ucol_open = (Ptr_ucol_open)lib.resolve("ucol_open"); + ptr_ucol_close = (Ptr_ucol_close)lib.resolve("ucol_close"); + ptr_ucol_strcoll = (Ptr_ucol_strcoll)lib.resolve("ucol_strcoll"); + + if (!ptr_ucol_open || !ptr_ucol_close || !ptr_ucol_strcoll) { + // try again with decorated symbol names + ptr_ucol_open = (Ptr_ucol_open)lib.resolve("ucol_open" STRINGIFY(U_ICU_VERSION_SUFFIX)); + ptr_ucol_close = (Ptr_ucol_close)lib.resolve("ucol_close" STRINGIFY(U_ICU_VERSION_SUFFIX)); + ptr_ucol_strcoll = (Ptr_ucol_strcoll)lib.resolve("ucol_strcoll" STRINGIFY(U_ICU_VERSION_SUFFIX)); + } + + if (!ptr_ucol_open || !ptr_ucol_close || !ptr_ucol_strcoll) { + ptr_ucol_open = 0; + ptr_ucol_close = 0; + ptr_ucol_strcoll = 0; + + qWarning("Unable to find symbols in icui18n"); + status = ErrorLoading; + return false; + } + + // resolve libicuuc + QLibrary ucLib(QLatin1String("icuuc"), QLatin1String(U_ICU_VERSION_SHORT)); + if (!ucLib.load()) { + qWarning() << "Unable to load library icuuc" << ucLib.errorString(); + status = ErrorLoading; + return false; + } + + ptr_u_strToUpper = (Ptr_u_strToCase)ucLib.resolve("u_strToUpper"); + ptr_u_strToLower = (Ptr_u_strToCase)ucLib.resolve("u_strToLower"); + + if (!ptr_u_strToUpper || !ptr_u_strToLower) { + ptr_u_strToUpper = (Ptr_u_strToCase)ucLib.resolve("u_strToUpper" STRINGIFY(U_ICU_VERSION_SUFFIX)); + ptr_u_strToLower = (Ptr_u_strToCase)ucLib.resolve("u_strToLower" STRINGIFY(U_ICU_VERSION_SUFFIX)); + } + + if (!ptr_u_strToUpper || !ptr_u_strToLower) { + ptr_u_strToUpper = 0; + ptr_u_strToLower = 0; + + qWarning("Unable to find symbols in icuuc"); + status = ErrorLoading; + return false; + } + + // success :) + status = Loaded; + } + + if (icuCollator) { + ptr_ucol_close(icuCollator); + icuCollator = 0; + } + + UErrorCode icuStatus = U_ZERO_ERROR; + icuCollator = ptr_ucol_open(localeString.toLatin1().constData(), &icuStatus); + + if (!icuCollator) { + qWarning("Unable to open locale %s in ICU, error code %d", qPrintable(localeString), icuStatus); + return false; + } + + return true; +} + +bool qt_ucol_strcoll(const QChar *source, int sourceLength, const QChar *target, int targetLength, int *result) +{ + Q_ASSERT(result); + Q_ASSERT(source); + Q_ASSERT(target); + + if (!icuCollator) + return false; + + *result = ptr_ucol_strcoll(icuCollator, reinterpret_cast<const UChar *>(source), int32_t(sourceLength), + reinterpret_cast<const UChar *>(target), int32_t(targetLength)); + + return true; +} + +// caseFunc can either be u_strToUpper or u_strToLower +static bool qt_u_strToCase(const QString &str, QString *out, const QLocale &locale, Ptr_u_strToCase caseFunc) +{ + Q_ASSERT(out); + + if (!icuCollator) + return false; + + QString result(str.size(), Qt::Uninitialized); + + UErrorCode status = U_ZERO_ERROR; + + int32_t size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(), + reinterpret_cast<const UChar *>(str.constData()), str.size(), + locale.bcp47Name().toLatin1().constData(), &status); + + if (U_FAILURE(status)) + return false; + + if (size < result.size()) { + result.resize(size); + } else if (size > result.size()) { + // the resulting string is larger than our source string + result.resize(size); + + status = U_ZERO_ERROR; + size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(), + reinterpret_cast<const UChar *>(str.constData()), str.size(), + locale.bcp47Name().toLatin1().constData(), &status); + + if (U_FAILURE(status)) + return false; + + // if the sizes don't match now, we give up. + if (size != result.size()) + return false; + } + + *out = result; + return true; +} + +bool qt_u_strToUpper(const QString &str, QString *out, const QLocale &locale) +{ + return qt_u_strToCase(str, out, locale, ptr_u_strToUpper); +} + +bool qt_u_strToLower(const QString &str, QString *out, const QLocale &locale) +{ + return qt_u_strToCase(str, out, locale, ptr_u_strToLower); +} + +QT_END_NAMESPACE |