qlocale_icu.cpp File Reference

#include "qglobal.h"
#include "qlibrary.h"
#include "qdebug.h"
#include "unicode/uversion.h"
#include "unicode/ucol.h"

Go to the source code of this file.

Macros
#define	STRINGIFY(x)   STRINGIFY2(x)
#define	STRINGIFY2(x)   #x

Typedefs
typedef int32_t(*	Ptr_u_strToCase) (UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode)
typedef void(*	Ptr_ucol_close) (UCollator *coll)
typedef UCollator *(*	Ptr_ucol_open) (const char *loc, UErrorCode *status)
typedef UCollationResult(*	Ptr_ucol_strcoll) (const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength)

Enumerations
enum	LibLoadStatus { ErrorLoading = -1, NotLoaded = 0, Loaded = 1 }

Functions
bool	qt_initIcu (const QString &localeString)
static bool	qt_u_strToCase (const QString &str, QString *out, const QLocale &locale, Ptr_u_strToCase caseFunc)
bool	qt_u_strToLower (const QString &str, QString *out, const QLocale &locale)
bool	qt_u_strToUpper (const QString &str, QString *out, const QLocale &locale)
bool	qt_ucol_strcoll (const QChar *source, int sourceLength, const QChar *target, int targetLength, int *result)

Variables
static UCollator *	icuCollator = 0
static Ptr_u_strToCase	ptr_u_strToLower = 0
static Ptr_u_strToCase	ptr_u_strToUpper = 0
static Ptr_ucol_close	ptr_ucol_close = 0
static Ptr_ucol_open	ptr_ucol_open = 0
static Ptr_ucol_strcoll	ptr_ucol_strcoll = 0
static LibLoadStatus	status = NotLoaded

Macro Definition Documentation

STRINGIFY

#define STRINGIFY

(

x

)

STRINGIFY2(x)

Definition at line 74 of file qlocale_icu.cpp.

Referenced by qt_initIcu().

STRINGIFY2

#define STRINGIFY2

(

x

)

#x

Definition at line 73 of file qlocale_icu.cpp.

Typedef Documentation

Ptr_u_strToCase

typedef int32_t(* Ptr_u_strToCase) (UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode)

Definition at line 54 of file qlocale_icu.cpp.

Ptr_ucol_close

typedef void(* Ptr_ucol_close) (UCollator *coll)

Definition at line 52 of file qlocale_icu.cpp.

Ptr_ucol_open

typedef UCollator*(* Ptr_ucol_open) (const char *loc, UErrorCode *status)

Definition at line 51 of file qlocale_icu.cpp.

Ptr_ucol_strcoll

typedef UCollationResult(* Ptr_ucol_strcoll) (const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength)

Definition at line 53 of file qlocale_icu.cpp.

Enumeration Type Documentation

LibLoadStatus

enum LibLoadStatus

Enumerator
ErrorLoading
NotLoaded
Loaded

Definition at line 62 of file qlocale_icu.cpp.

{
    ErrorLoading = -1,
    NotLoaded = 0,
    Loaded = 1
};

Function Documentation

qt_initIcu()

bool qt_initIcu

(

const QString &

localeString

)

Definition at line 76 of file qlocale_icu.cpp.

Referenced by QLocale::setDefault(), and QLocalePrivate::updateSystemPrivate().

{
    if (status == ErrorLoading)
        return false;

    if (status == NotLoaded) {

        // resolve libicui18n
        QLibrary lib(QLatin1String("icui18n"), QLatin1String(U_ICU_VERSION_SHORT));
        lib.setLoadHints(QLibrary::ImprovedSearchHeuristics);
        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));
        ucLib.setLoadHints(QLibrary::ImprovedSearchHeuristics);
        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;
}

qt_u_strToCase()

static bool qt_u_strToCase ( const QString &  str, QString *  out, const QLocale &  locale, Ptr_u_strToCase  caseFunc  )

static

Definition at line 175 of file qlocale_icu.cpp.

Referenced by qt_u_strToLower(), and qt_u_strToUpper().

{
    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;
}

qt_u_strToLower()

bool qt_u_strToLower	(	const QString &	str,
		QString *	out,
		const QLocale &	locale
	)

Definition at line 221 of file qlocale_icu.cpp.

Referenced by QLocale::toLower().

{
    return qt_u_strToCase(str, out, locale, ptr_u_strToLower);
}

qt_u_strToUpper()

bool qt_u_strToUpper	(	const QString &	str,
		QString *	out,
		const QLocale &	locale
	)

Definition at line 216 of file qlocale_icu.cpp.

Referenced by QLocale::toUpper().

{
    return qt_u_strToCase(str, out, locale, ptr_u_strToUpper);
}

qt_ucol_strcoll()

bool qt_ucol_strcoll	(	const QChar *	source,
		int	sourceLength,
		const QChar *	target,
		int	targetLength,
		int *	result
	)

Definition at line 159 of file qlocale_icu.cpp.

Referenced by QString::localeAwareCompare_helper().

{
    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;
}

Variable Documentation

icuCollator

UCollator* icuCollator = 0

static

Definition at line 71 of file qlocale_icu.cpp.

Referenced by qt_initIcu(), qt_u_strToCase(), and qt_ucol_strcoll().

ptr_u_strToLower

Ptr_u_strToCase ptr_u_strToLower = 0

static

Definition at line 60 of file qlocale_icu.cpp.

Referenced by qt_initIcu(), and qt_u_strToLower().

ptr_u_strToUpper

Ptr_u_strToCase ptr_u_strToUpper = 0

static

Definition at line 59 of file qlocale_icu.cpp.

Referenced by qt_initIcu(), and qt_u_strToUpper().

ptr_ucol_close

Ptr_ucol_close ptr_ucol_close = 0

static

Definition at line 58 of file qlocale_icu.cpp.

Referenced by qt_initIcu().

ptr_ucol_open

Ptr_ucol_open ptr_ucol_open = 0

static

Definition at line 56 of file qlocale_icu.cpp.

Referenced by qt_initIcu().

ptr_ucol_strcoll

Ptr_ucol_strcoll ptr_ucol_strcoll = 0

static

Definition at line 57 of file qlocale_icu.cpp.

Referenced by qt_initIcu(), and qt_ucol_strcoll().

status

LibLoadStatus status = NotLoaded

static

Definition at line 69 of file qlocale_icu.cpp.

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