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// This is the support for QString.
//
// Copyright (c) 2018 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of PyQt5.
//
// This file may be used under the terms of the GNU General Public License
// version 3.0 as published by the Free Software Foundation and appearing in
// the file LICENSE included in the packaging of this file. Please review the
// following information to ensure the GNU General Public License version 3.0
// requirements will be met: http://www.gnu.org/copyleft/gpl.html.
//
// If you do not wish to use this file under the terms of the GPL version 3.0
// then you may purchase a commercial license. For more information contact
// info@riverbankcomputing.com.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#include <Python.h>
#include <string.h>
#include <QString>
#include <QVector>
#include "qpycore_api.h"
#include "sipAPIQtCore.h"
// Work out if we should enable PEP 393 support. This is complicated by the
// broken LLVM that XCode v4 installs.
#if PY_VERSION_HEX >= 0x03030000
#if defined(Q_OS_MAC)
#if !defined(__llvm__) || defined(__clang__)
// Python v3.3 or later on a Mac using either g++ or Clang, but not LLVM.
#define PYQT_PEP_393
#endif
#else
// Python v3.3 or later on a non-Mac.
#define PYQT_PEP_393
#endif
#endif
// Convert a QString to a Python Unicode object.
PyObject *qpycore_PyObject_FromQString(const QString &qstr)
{
PyObject *obj;
#if defined(PYQT_PEP_393)
// We have to work out exactly which kind to use. We assume ASCII while we
// are checking so that we only go through the string once in the most
// common case. Note that we can't use PyUnicode_FromKindAndData() because
// it doesn't handle surrogates in UCS2 strings.
int qt_len = qstr.length();
int kind;
void *data;
if ((obj = sipUnicodeNew(qt_len, 0x007f, &kind, &data)) == NULL)
return NULL;
const QChar *qch = qstr.constData();
for (int qt_i = 0; qt_i < qt_len; ++qt_i)
{
ushort uch = qch->unicode();
if (uch > 0x007f)
{
// This is useless.
Py_DECREF(obj);
// Work out what kind we really need and what the Python length
// should be.
uint maxchar = 0x00ff;
int py_len = qt_len;
while (qt_i < qt_len)
{
uch = qch->unicode();
if (uch > 0x00ff)
{
if (maxchar == 0x00ff)
maxchar = 0x00ffff;
// See if this is a surrogate pair. Note that we cannot
// trust that the QString is terminated by a null QChar.
if (qch->isHighSurrogate() && qt_i + 1 < qt_len && (qch + 1)->isLowSurrogate())
{
maxchar = 0x10ffff;
--py_len;
++qch;
++qt_i;
}
}
++qch;
++qt_i;
}
// Create the correctly sized object.
if ((obj = sipUnicodeNew(py_len, maxchar, &kind, &data)) == NULL)
return NULL;
qch = qstr.constData();
int qt_i2 = 0;
for (int py_i = 0; py_i < py_len; ++py_i)
{
uint py_ch;
if (qch->isHighSurrogate() && qt_i2 + 1 < qt_len && (qch + 1)->isLowSurrogate())
{
py_ch = QChar::surrogateToUcs4(*qch, *(qch + 1));
++qt_i2;
++qch;
}
else
{
py_ch = qch->unicode();
}
++qt_i2;
++qch;
sipUnicodeWrite(kind, data, py_i, py_ch);
}
break;
}
++qch;
sipUnicodeWrite(kind, data, qt_i, uch);
}
#elif defined(Py_UNICODE_WIDE)
QVector<uint> ucs4 = qstr.toUcs4();
if ((obj = PyUnicode_FromUnicode(NULL, ucs4.size())) == NULL)
return NULL;
memcpy(PyUnicode_AS_UNICODE(obj), ucs4.constData(),
ucs4.size() * sizeof (Py_UNICODE));
#else
if ((obj = PyUnicode_FromUnicode(NULL, qstr.length())) == NULL)
return NULL;
memcpy(PyUnicode_AS_UNICODE(obj), qstr.utf16(),
qstr.length() * sizeof (Py_UNICODE));
#endif
return obj;
}
// Convert a Python Unicode object to a QString.
QString qpycore_PyObject_AsQString(PyObject *obj)
{
#if defined(PYQT_PEP_393)
int char_size;
Py_ssize_t len;
void *data = sipUnicodeData(obj, &char_size, &len);
if (char_size == 1)
return QString::fromLatin1(reinterpret_cast<char *>(data), len);
if (char_size == 2)
// The (QChar *) cast should be safe.
return QString(reinterpret_cast<QChar *>(data), len);
if (char_size == 4)
return QString::fromUcs4(reinterpret_cast<uint *>(data), len);
return QString();
#elif defined(Py_UNICODE_WIDE)
return QString::fromUcs4((const uint *)PyUnicode_AS_UNICODE(obj),
PyUnicode_GET_SIZE(obj));
#else
return QString::fromUtf16((const ushort *)PyUnicode_AS_UNICODE(obj),
PyUnicode_GET_SIZE(obj));
#endif
}
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