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**
** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
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** This file is part of the QtCore module of the Qt Toolkit.
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****************************************************************************/

#include "qstring.h"

#import <Foundation/Foundation.h>

QT_BEGIN_NAMESPACE

QString QString::fromCFString(CFStringRef string)
{
    if (!string)
        return QString();
    CFIndex length = CFStringGetLength(string);

    // Fast path: CFStringGetCharactersPtr does not copy but may
    // return null for any and no reason.
    const UniChar *chars = CFStringGetCharactersPtr(string);
    if (chars)
        return QString(reinterpret_cast<const QChar *>(chars), length);

    QString ret(length, Qt::Uninitialized);
    CFStringGetCharacters(string, CFRangeMake(0, length), reinterpret_cast<UniChar *>(ret.data()));
    return ret;
}

CFStringRef QString::toCFString() const
{
    return CFStringCreateWithCharacters(0, reinterpret_cast<const UniChar *>(unicode()), length());
}

QString QString::fromNSString(const NSString *string)
{
    if (!string)
        return QString();
   QString qstring;
   qstring.resize([string length]);
   [string getCharacters: reinterpret_cast<unichar*>(qstring.data()) range: NSMakeRange(0, [string length])];
   return qstring;
}

NSString *QString::toNSString() const
{
    return [NSString stringWithCharacters: reinterpret_cast<const UniChar*>(unicode()) length: length()];
}

QT_END_NAMESPACE